SIST EN ISO 13473-1:2019
(Main)Characterization of pavement texture by use of surface profiles - Part 1: Determination of mean profile depth (ISO 13473-1:2019)
Characterization of pavement texture by use of surface profiles - Part 1: Determination of mean profile depth (ISO 13473-1:2019)
This document describes a test method to determine the average depth of pavement surface
macrotexture (see Clause 3) by measuring the profile of a surface and calculating the texture depth
from this profile. The technique is designed to provide an average depth value of only the pavement
macrotexture and is considered insensitive to pavement microtexture and unevenness characteristics.
The objective of this document is to make available an internationally accepted procedure for
determination of pavement surface texture depth which is an alternative to the traditionally used
volumetric patch technique (generally using sand or glass beads), giving comparable texture depth
values. To this end, this document describes filtering procedures that are designed to give the best
possible representation of texture depths determined with the volumetric patch method[13].
Modern profilometers in use are almost entirely of the contactless type (e.g. laser, light slit or light
sheet, to mention a few) and this document is primarily intended for this type. However, this does not
exclude application of parts of it for other types of profilometers.
This ISO 13473 series has been prepared as a result of a need identified when specifying a test surface
for vehicle noise measurement (see ISO 10844:2014[6]). Macrotexture depth measurements according
to this document are not generally adequate for specifying test conditions of vehicle or traffic noise
measurements, but have limited applications as a supplement in conjunction with other ways of
specifying a surfacing.
This test method is suitable for determining the mean profile depth (MPD) of a pavement surface.
This MPD can be transformed to a quantity which estimates the macrotexture depth according to
the volumetric patch method. It is applicable to field tests as well as laboratory tests on pavement
samples. When used in conjunction with other physical tests, the macrotexture depth values derived
from this test method are applicable to estimation of pavement skid resistance characteristics (see e.g.
Reference [15]), estimation of noise characteristics and assessment of the suitability of paving materials
or pavement finishing techniques.
The method, together with other measurements (where applicable), such as porosity or microtexture,
can be used to assess the quality of pavements.
This document is adapted for pavement texture measurement and is not intended for other applications.
Pavement aggregate particle shape, size and distribution are surface texture features not addressed
in this procedure. The method is not meant to provide a complete assessment of pavement surface
texture characteristics. In particular, it is known that there are problems in interpreting the result if
the method is applied to porous surfaces or to grooved surfaces (see Annex B).
NOTE Other International Standards dealing with surface profiling methods include, for example,
References [1], [2] and [3]. Although it is not clearly stated in these, they are mainly used for measuring surface
finish (microtexture) of metal surfaces and are not intended to be applied to pavements.
Charakterisierung der Textur von Fahrbahnbelägen unter Verwendung von Oberflächenprofilen - Teil 1: Bestimmung der mittleren Profiltiefe (ISO 13473-1:2019)
Dieser Teil von ISO 13473 beschreibt ein Prüfverfahren zur Bestimmung der mittleren Tiefe der Makrotextur der Fahrbahnoberfläche (siehe Abschnitt 3 „Begriffe“) durch Messung des Profils einer Oberfläche und Berechnung der Texturtiefe aus diesem Profil. Das Verfahren dient dazu, einen Wert ausschließlich für die mittlere Tiefe der Makrotextur des Fahrbahnbelags zu liefern, und ist als unempfindlich gegenüber der Mikrotextur und Unebenheit der Fahrbahn zu berücksichtigen.
Zweck dieses Teils von ISO 13473 ist es, ein international anerkanntes Verfahren zur Bestimmung der Texturtiefe der Fahrbahnoberfläche als Alternative zu dem herkömmlichen volumetrischen Verfahren (üblicherweise unter Verwendung von Sand- oder Glaskugelflecken), das vergleichbare Texturtiefenwerte ergibt, verfügbar zu machen.
Die meisten aktuell verwendeten Profilometer sind in kontaktloser Ausführung (z. B. Laser oder Lichtschlitz, um nur einige zu nennen) und diese Norm ist für diese Ausführung vorgesehen. Relevante Teile dieser Norm können jedoch auch für eine Kontakt-Ausführung der Profilometer gelten.
Die Normenreihe ISO 13473 wurde aufgrund eines festgestellten Bedarfs bei der Festlegung einer Prüfoberfläche für Messungen der Fahrzeuggeräusche (ISO 10844) erstellt. Makrotexturtiefenmessungen nach der vorliegenden Internationalen Norm sind nicht in jedem Fall dafür geeignet, Prüfbedingungen für Fahrzeug- oder Verkehrsgeräuschmessungen festzulegen, sie sind aber in Verbindung mit anderen Verfahren zur Festlegung einer Oberfläche bedingt als Ergänzung verwendbar.
Das hier beschriebene Prüfverfahren ist für die Bestimmung der mittleren Profiltiefe einer Fahrbahnober-fläche geeignet. Diese mittlere Profiltiefe kann zu einer Größe umgerichtet werden, die eine Schätzung der Makrotexturtiefe in Übereinstimmung mit dem volumetrischen Verfahren darstellt. Es ist gleichermaßen bei Feld- und Laborprüfungen an Belagproben anwendbar. Bei Anwendung in Kombination mit anderen physikalischen Prüfverfahren sind die aus diesem Prüfverfahren abgeleiteten Makrotextur¬tiefen¬werte für die Schätzung der Merkmale der Fahrbahngriffigkeit (siehe beispielsweise Literatur¬hinweis [1]), die Schätzung der Geräuschmerkmale und die Beurteilung der Eignung des Belagmaterials oder der Oberflächenbearbeitungsverfahren anwendbar.
Dieses Verfahren kann zusammen mit anderen Messungen (sofern anwendbar) wie etwa der Porosität oder Mikrotextur zur Beurteilung der Qualität von Fahrbahnbelägen verwendet werden.
Dieser Teil von ISO 13473 ist an die Messung der Textur eines Fahrbahnbelags angepasst und nicht für andere Anwendungen vorgesehen. Form, Größe und Verteilung der Partikel von Zuschlagstoffen sind nicht Gegenstand der Belagsmerkmale für dieses Verfahren. Das Verfahren ist nicht als vollständige Beurteilung aller Oberflächeneigenschaften der Textur eines Fahrbahnbelags gedacht. Besondere Vorsicht ist bei der Auswertung der Ergebnisse geboten, wenn das Verfahren auf poröse oder gerillte Oberflächen angewendet wird (siehe Anhang B).
ANMERKUNG Andere Internationale Normen, die sich mit Methoden zur Messung von Oberflächenprofilen befassen, umfassen beispielsweise ISO 468 [2], ISO 1878 [3], ISO 1879 [4], ISO 1880 [5], ISO 3274 [6], ISO 4287 [7] [8] und ISO 4288 [9] (siehe Literaturhinweise). Obwohl es in diesen Normen nicht ausdrücklich vermerkt ist, werden sie vor allem für die Messung (der Mikrotextur) endbehandelter Metalloberflächen verwendet und gelten nicht für Fahrbahnbeläge.
Caractérisation de la texture d'un revêtement de chaussée à partir de relevés de profils de la surface - Partie 1: Détermination de la profondeur moyenne du profil (ISO 13473-1:2019)
Le présent document décrit une méthode d'essai permettant de déterminer la profondeur moyenne de la macrotexture de la surface d'un revêtement (voir Article 3) en mesurant le profil de cette surface et en calculant la profondeur de texture à partir de ce profil. Cette technique est conçue pour fournir une valeur de la profondeur moyenne de la macrotexture du revêtement uniquement et est considérée comme insensible aux caractéristiques de microtexture et d'uni du revêtement.
L'objectif du présent document est de proposer une procédure reconnue à l'échelle internationale permettant de déterminer la profondeur de texture de la surface d'un revêtement qui soit une alternative à la méthode volumétrique traditionnelle à la tache (qui utilise généralement du sable ou des microbilles de verre) et qui donne des valeurs de profondeur de texture comparables. A cette fin, le présent document décrit une procédure de filtrage conçue pour donner la meilleure représentation possible de la profondeur de texture déterminée avec la méthode volumétrique [13].
Les profilomètres modernes utilisés sont presque tous du type sans contact (par exemple à laser ou lumière à fente pour n'en citer que quelques-uns) et le présent document concerne principalement ce type de capteurs. Toutefois, cela n'exclut pas l'application de certaines parties du présent document à d'autres types de profilomètre.
La série des normes ISO 13473 a été préparée pour répondre à un besoin identifié au moment de l'élaboration de la norme décrivant les spécifications des surfaces d'essai pour le mesurage du bruit émis par les véhicules routiers (voir ISO 10844:2014[6]). Les mesurages de la profondeur de la macrotexture, conformément au présent document ne conviennent généralement pas pour spécifier des conditions d'essai relatives aux mesurages du bruit occasionné par les véhicules ou le trafic routiers, mais ont des applications limitées comme supplément en conjonction avec d'autres façons de spécifier un revêtement de surface.
Il convient d'utiliser la présente méthode d'essai pour déterminer la profondeur moyenne du profil (PMP) de la surface d'un revêtement. Cette profondeur moyenne du profil peut être transformée en une valeur permettant d'évaluer la profondeur de la macrotexture selon la méthode volumétrique à la tâche. Elle est applicable soit pour des essais sur le terrain, soit pour des essais en laboratoire sur des échantillons de revêtement. Quand on combine les valeurs de la profondeur de la macrotexture obtenues par la présente méthode à d'autres essais physiques, on peut les utiliser pour évaluer les caractéristiques d'adhérence du revêtement (voir par exemple la Référence [15]), estimer les caractéristiques du bruit et évaluer l'adéquation des matériaux de pavage ou des techniques de finition.
Cette méthode ainsi que d'autres mesurages comme les mesurages de la porosité ou de la microtexture, quand il est possible de les effectuer, peuvent également servir à déterminer la qualité des revêtements.
Le présent document est adapté au mesurage de la texture des revêtements de chaussée et n'est pas destinée à d'autres applications. La forme, la taille et la distribution des granulats sont des caractéristiques de la texture de surface qui ne sont pas traitées dans la présente norme. Cette méthode n'a pas pour objectif de déterminer toutes les caractéristiques de la texture de surface d'un revêtement. En particulier, des précautions doivent être prises lors de l'interprétation des r
Karakterizacija teksture vozišča z uporabo profilov površine - 1. del: Ugotavljanje povprečne globine profila (ISO 13473-1:2019)
Ta dokument opisuje preskusno metodo za ugotavljanje povprečne globine makrostrukture površine vozišča (glej točko 3) z merjenjem profila površine in izračunom globine teksture
na podlagi tega profila. Tehnika je zasnovana tako, da podaja povprečno vrednost globine zgolj
makroteksture vozišča ter se obravnava kot neobčutljiva za mikroteksturo vozišča in lastnosti neravnosti.
Namen tega dokumenta je omogočiti razpoložljivost mednarodno priznanega postopka za ugotavljanje globine teksture površine vozišča, ki je alternativa tradicionalno uporabljani tehniki z volumetričnimi zaplatami (običajno s peskom ali steklenimi kroglicami) in podaja primerljive vrednosti globine teksture. V skladu s tem namenom ta dokument opisuje postopke filtriranja, ki so zasnovani tako, da zagotavljajo najboljši možen prikaz globin teksture na podlagi metode z volumetrično zaplato [13].
Sodobni merilniki profilov, ki so v uporabi, so skoraj v celoti brezstični (npr. laser, svetlobna reža, svetlobni trak) in ta dokument je namenjen predvsem tej vrsti merilnikov. Vendar to ne izključuje uporabe njegovih delov za druge vrste merilnikov profilov.
Ta skupina standardov ISO 13473 je bila pripravljena zaradi potrebe, ugotovljene pri določanju preskusne površine za merjenje hrupa vozil (glej ISO 10844:2014[6]). Meritve globine makroteksture v skladu s tem dokumentom na splošno niso primerne za določanje preskusnih pogojev za meritve hrupa vozil ali prometa, vendar se lahko omejeno uporabljajo kot dodatek v povezavi z drugimi načini določanja površine.
Ta preskusna metoda je primerna za ugotavljanje povprečne globine profila (MPD) površine vozišča. Ta povprečna globina profila se lahko preoblikuje v količino, ki omogoča oceno globine makroteksture v skladu z metodo z volumetrično zaplato. Uporablja se za terenske in laboratorijske preskuse na vzorcih vozišč. Pri uporabi v povezavi z drugimi fizičnimi preskusi se lahko vrednosti globine makroteksture,
izpeljane iz te preskusne metode, uporabijo za ocenjevanje značilnosti torne sposobnosti vozišča (glej npr. sklic [15]), značilnosti hrupa in primernosti materialov za vozišča ali tehnik končne obdelave vozišč.
Metoda se lahko skupaj z drugimi meritvami (kadar je to primerno), kot so meritve poroznosti ali mikroteksture, uporablja za oceno kakovosti vozišč.
Ta dokument je prilagojen za merjenje teksture vozišča in ni namenjen za druge vrste uporabe.
Oblika, velikost in porazdelitev delcev agregata vozišča so lastnosti teksture površine,
ki v tem postopku niso obravnavane. Metoda ni namenjena temu, da bi podala popolno oceno
lastnosti teksture površine vozišča. Do težav lahko pride zlasti pri razlagi rezultata,
če se metoda nanaša na porozne površine ali na površine z utori (glej dodatek B).
OPOMBA: Drugi mednarodni standardi, ki obravnavajo metode profiliranja površin, vključujejo npr.
sklice [1], [2] in [3]. Čeprav to v njih ni jasno navedeno, se uporabljajo predvsem za merjenje površinske obdelave (mikroteksture) kovinskih površin in se predvidoma ne uporabljajo za vozišča.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13473-1:2019
01-maj-2019
1DGRPHãþD
SIST EN ISO 13473-1:2004
.DUDNWHUL]DFLMDWHNVWXUHYR]LãþD]XSRUDERSURILORYSRYUãLQHGHO 8JRWDYOMDQMH
SRYSUHþQHJORELQHSURILOD ,62
Characterization of pavement texture by use of surface profiles - Part 1: Determination of
mean profile depth (ISO 13473-1:2019)
Charakterisierung der Textur von Fahrbahnbelägen unter Verwendung von
Oberflächenprofilen - Teil 1: Bestimmung der mittleren Profiltiefe (ISO 13473-1:2019)
Caractérisation de la texture d'un revêtement de chaussée à partir de relevés de profils
de la surface - Partie 1: Détermination de la profondeur moyenne du profil (ISO 13473-
1:2019)
Ta slovenski standard je istoveten z: EN ISO 13473-1:2019
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
93.080.20 Materiali za gradnjo cest Road construction materials
SIST EN ISO 13473-1:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 13473-1:2019
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SIST EN ISO 13473-1:2019
EN ISO 13473-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 17.140.30; 93.080.20 Supersedes EN ISO 13473-1:2004
English Version
Characterization of pavement texture by use of surface
profiles - Part 1: Determination of mean profile depth (ISO
13473-1:2019)
Caractérisation de la texture d'un revêtement de Charakterisierung der Textur von Fahrbahnbelägen
chaussée à partir de relevés de profils de la surface - unter Verwendung von Oberflächenprofilen - Teil 1:
Partie 1: Détermination de la profondeur moyenne du Bestimmung der mittleren Profiltiefe (ISO 13473-
profil (ISO 13473-1:2019) 1:2019)
This European Standard was approved by CEN on 21 January 2019.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13473-1:2019 E
worldwide for CEN national Members.
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SIST EN ISO 13473-1:2019
EN ISO 13473-1:2019 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 13473-1:2019
EN ISO 13473-1:2019 (E)
European foreword
This document (EN ISO 13473-1:2019) has been prepared by Technical Committee ISO/TC 43
"Acoustics" in collaboration with Technical Committee CEN/TC 227 “Road materials” the secretariat of
which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2019, and conflicting national standards
shall be withdrawn at the latest by September 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13473-1:2004.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13473-1:2019 has been approved by CEN as EN ISO 13473-1:2019 without any
modification.
3
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SIST EN ISO 13473-1:2019
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SIST EN ISO 13473-1:2019
INTERNATIONAL ISO
STANDARD 13473-1
Second edition
2019-02
Characterization of pavement texture
by use of surface profiles —
Part 1:
Determination of mean profile depth
Caractérisation de la texture d'un revêtement de chaussée à partir de
relevés de profils de la surface —
Partie 1: Détermination de la profondeur moyenne du profil
Reference number
ISO 13473-1:2019(E)
©
ISO 2019
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SIST EN ISO 13473-1:2019
ISO 13473-1:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 13473-1:2019
ISO 13473-1:2019(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Test surfaces . 4
4.1 Condition of the surface . 4
4.2 Amount of data to be collected per field test section . 4
4.2.1 Continuous measurements . 4
4.2.2 Spot measurements . 5
4.3 Amount of data to be collected on laboratory samples . 5
5 Measurement instruments . 5
5.1 Instruments in general . 5
5.2 Vertical resolution . 6
5.3 Horizontal resolution . 6
5.4 Measurement speed . 6
5.5 Alignment of sensor . 7
5.6 Bandwidth of sensor and recording system . 7
5.7 Performance check . 8
5.8 Indication of invalid readings (drop-outs) . 8
5.9 Sensitivity to vibrations . 8
6 Measurement procedure . 8
6.1 Performance checks. 8
6.2 Measurements . 8
6.3 Continuous or spot measurements . 8
7 Data processing procedure . 9
7.1 General . 9
7.2 Summary of data processing steps . 9
7.3 Drop-out correction and interpolation .10
7.4 Resampling to a certain spatial resolution .11
7.5 Spike identification and reshaping the profile .11
7.6 Removal of long-wavelength components and normalization of profile sharpness .11
7.7 Segment limiting.12
7.8 Peak and MSD determination .12
7.9 Extreme MSD value removal (optional) .12
7.10 Averaging of MSD to determine the MPD .12
7.11 Calculation of ETD (optional) .12
8 Measurement uncertainty assessment according to ISO/IEC Guide 98-3 .13
9 Safety considerations .15
10 Test report .15
Annex A (informative) Texture ranges .17
Annex B (informative) Problems experienced on special surfaces .20
Annex C (informative) Procedure for sampling of mean segment depth values by spot
measurements .22
Annex D (normative) Data quality-enhancing procedures .25
Annex E (normative) Spike removal procedure .29
Annex F (informative) Measurement uncertainty .32
© ISO 2019 – All rights reserved iii
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SIST EN ISO 13473-1:2019
ISO 13473-1:2019(E)
Annex G (informative) Performance check .36
Annex H (informative) Flow charts for determination of MSD and MPD .39
Bibliography .42
iv © ISO 2019 – All rights reserved
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SIST EN ISO 13473-1:2019
ISO 13473-1:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.
This second edition cancels and replaces the first edition (ISO 13473-1:1997), which has been technically
revised. The main changes compared to the previous edition are as follows:
— Some alternative calculation options such as the slope suppression for continuous data have
been removed.
— A more precise definition of high-pass and low-pass filtering has been provided.
— Removal of spikes has been introduced in the profile.
— The MPD now refers only to the overall value obtained after averaging all MSDs where MSD
means Mean Segment Depth (earlier, MPD was used as the term both for the mean segment depth and
for mean profile depth, which might have been confusing).
A list of all parts in the ISO 13473 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
© ISO 2019 – All rights reserved v
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SIST EN ISO 13473-1:2019
ISO 13473-1:2019(E)
Introduction
Road surface texture determines factors such as noise emission from the tyre/pavement interface,
acoustic comfort inside vehicles, friction between the tyre and road, rolling resistance and tyre wear.
The main concept and the basic terms are illustrated for information in Annex A. Valid methods for
measuring surface texture are therefore highly desirable.
The so-called “sand patch” method, or the more general “volumetric patch” method (see Clause 3), has
been used worldwide for many years to give a single and very simple measurement describing surface
texture. It relies on a given volume of sand or glass beads which is spread out on a surface. The material
is distributed to form a circular patch, the diameter of which is measured. By dividing the volume
of material spread out by the area covered, a value is obtained which represents the average depth
of the sand or glass bead layer, known as “mean texture depth” (MTD). The method was originally
1)
[5]
standardized in ISO 10844:1994 , Annex A in order to put limits concerning surface texture for a
[13]
reference surface used for vehicle noise testing but was later adopted by CEN as EN 13036-1 .
The volumetric patch method is operator-dependent and can be used only on surfaces which are partly
or fully closed to traffic. Therefore, it is not practical for use in network surveys of roads, for example.
Along with developments in contactless surface profiling techniques, it has become possible to replace
the volumetric patch measurements with those derived from profile recordings, which are possible
to make by mobile equipment in flowing traffic. However, several very different techniques have been
used to calculate a “predicted mean texture depth”, many of them quite successfully. The values they
give are not always comparable, although individually they generally offer good correlation coefficients
with texture depth measured with the volumetric patch method.
It is, therefore, important to have a standardized method for measuring and evaluating the texture
depth by a more modern, safe and economical technique than the traditional volumetric patch method,
resulting in values which are directly compatible both with the patch-measured values and between
different equipment.
1) Withdrawn and replaced by ISO 10844:2014.
vi © ISO 2019 – All rights reserved
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SIST EN ISO 13473-1:2019
INTERNATIONAL STANDARD ISO 13473-1:2019(E)
Characterization of pavement texture by use of surface
profiles —
Part 1:
Determination of mean profile depth
1 Scope
This document describes a test method to determine the average depth of pavement surface
macrotexture (see Clause 3) by measuring the profile of a surface and calculating the texture depth
from this profile. The technique is designed to provide an average depth value of only the pavement
macrotexture and is considered insensitive to pavement microtexture and unevenness characteristics.
The objective of this document is to make available an internationally accepted procedure for
determination of pavement surface texture depth which is an alternative to the traditionally used
volumetric patch technique (generally using sand or glass beads), giving comparable texture depth
values. To this end, this document describes filtering procedures that are designed to give the best
[13]
possible representation of texture depths determined with the volumetric patch method .
Modern profilometers in use are almost entirely of the contactless type (e.g. laser, light slit or light
sheet, to mention a few) and this document is primarily intended for this type. However, this does not
exclude application of parts of it for other types of profilometers.
This ISO 13473 series has been prepared as a result of a need identified when specifying a test surface
[6]
for vehicle noise measurement (see ISO 10844:2014 ). Macrotexture depth measurements according
to this document are not generally adequate for specifying test conditions of vehicle or traffic noise
measurements, but have limited applications as a supplement in conjunction with other ways of
specifying a surfacing.
This test method is suitable for determining the mean profile depth (MPD) of a pavement surface.
This MPD can be transformed to a quantity which estimates the macrotexture depth according to
the volumetric patch method. It is applicable to field tests as well as laboratory tests on pavement
samples. When used in conjunction with other physical tests, the macrotexture depth values derived
from this test method are applicable to estimation of pavement skid resistance characteristics (see e.g.
Reference [15]), estimation of noise characteristics and assessment of the suitability of paving materials
or pavement finishing techniques.
The method, together with other measurements (where applicable), such as porosity or microtexture,
can be used to assess the quality of pavements.
This document is adapted for pavement texture measurement and is not intended for other applications.
Pavement aggregate particle shape, size and distribution are surface texture features not addressed
in this procedure. The method is not meant to provide a complete assessment of pavement surface
texture characteristics. In particular, it is known that there are problems in interpreting the result if
the method is applied to porous surfaces or to grooved surfaces (see Annex B).
NOTE Other International Standards dealing with surface profiling methods include, for example,
References [1], [2] and [3]. Although it is not clearly stated in these, they are mainly used for measuring surface
finish (microtexture) of metal surfaces and are not intended to be applied to pavements.
© ISO 2019 – All rights reserved 1
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SIST EN ISO 13473-1:2019
ISO 13473-1:2019(E)
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
measurement (GUM: 1995)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
texture wavelength
λ
quantity describing the horizontal dimension of the irregularities of a texture profile (3.3)
Note 1 to entry: Texture wavelength is normally expressed in metres (m) or millimetres (mm).
Note 2 to entry: Texture wavelength is a descriptor of the wavelength components of the profile and is related
to the concept of the Fourier Transform of a series regularly sampled measurement points along a spatial axis.
Vertical displacement (height) has an arbitrary reference.
3.2
texture
pavement texture
deviation of a pavement surface from a true planar surface, with a texture wavelength (3.1) less than 0,5 m
3.3
surface profile
texture profile
upper contour of a vertical cross-section through a pavement
Note 1 to entry: Texture profile is similar to surface profile but limited to the texture range.
Note 2 to entry: The profile of the surface is described by two coordinates: one in the surface plane, called
distance (the abscissa), and the other in a direction normal to the surface plane, called vertical displacement
(the ordinate). An example is given in Figure A.1. The distance may be in the longitudinal or lateral (transverse)
directions in relation to the travel direction on a pavement, or in a circle or any other direction between these
extremes.
3.4
macrotexture
pavement macrotexture
deviation of a pavement surface from a true planar surface with the characteristic dimensions along the
surface of 0,5 mm to 50 mm, corresponding to texture wavelengths (3.1) with one-third-octave bands
including the range 0,63 mm to 50 mm of centre wavelengths
Note 1 to entry: Peak-to-peak amplitudes may normally vary in the range 0,1 mm to 20 mm. This type of texture
is the texture which has wavelengths of the same order of size as tyre tread elements in the tyre/road interface.
Surfaces are normally designed with a sufficient macrotexture to obtain suitable water drainage in the tyre/
road interface. The macrotexture is obtained by suitable proportioning of the aggregate and mortar of the mix or
by surface finishing techniques.
2 © ISO 2019 – All rights reserved
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ISO 13473-1:2019(E)
Note 2 to entry: Based on physical relations between texture and friction, noise, etc., the World Road Association
[16]
(PIARC) originally defined the ranges of micro-, macro- and megatexture . Figure A.2, which is a modified
version of the original PIARC figure, illustrates how these definitions cover certain ranges of surface texture
wavelength and spatial frequency. In this figure, “discomfort for travellers” includes effects experienced in and
on motorized road vehicles and bicycles, as well as wheelchairs and other vehicles used by disabled people.
3.5 Texture depth measurements
3.5.1
texture depth
TD
in the three-dimensional case, the distance between the surface and a plane through the top of the
three highest peaks within a surface area in the same order of a size as that of a car tyre/pavement
interface
Note 1 to entry: See Figure A.3.
3.5.2
mean texture depth
MTD
texture depth (3.5.1) obtained from the volumetric patch method
Note 1 to entry: In the application of the “volumetric patch method” (see below), the “plane” is in practice
determined by the contact between a rubber pad and the surface when the pad is rubbed over the area. Therefore,
the texture depth obtained in this case is not based on exactly a “plane”, but rather an approximation which is a
somewhat curved surface that is hard to define.
3.5.3
profile depth
PD
in the two-dimensional case, i.e. when studying a profile, the difference, within a certain longitudinal/
lateral distance in the same order of length as that of a car tyre/pavement contact interface, between
the profile and a horizontal line through the top of the highest peak within this profile
3.5.4
evaluation length
l
length of a portion of one or more profiles for which MPD (3.5.2) is to be calculated
3.5.5
segment
portion of the profile over a length
...
SLOVENSKI STANDARD
oSIST prEN ISO 13473-1:2017
01-september-2017
.DUDNWHUL]DFLMDWHNVWXUHYR]LãþD]XSRUDERSURILORYSRYUãLQHGHO 8JRWDYOMDQMH
SRYSUHþQHJORELQHSURILOD ,62',6
Characterization of pavement texture by use of surface profiles - Part 1: Determination of
mean profile depth (ISO/DIS 13473-1:2017)
Charakterisierung der Textur von Fahrbahnbelägen unter Verwendung von
Oberflächenprofilen - Teil 1: Bestimmung der mittleren Profiltiefe (ISO/DIS 13473-
1:2017)
Caractérisation de la texture d'un revêtement de chaussée à partir de relevés de profils
de la surface - Partie 1: Détermination de la profondeur moyenne du profil (ISO/DIS
13473-1:2017)
Ta slovenski standard je istoveten z: prEN ISO 13473-1
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
93.080.20 Materiali za gradnjo cest Road construction materials
oSIST prEN ISO 13473-1:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 13473-1:2017
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oSIST prEN ISO 13473-1:2017
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13473-1
ISO/TC 43/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2017-07-11 2017-10-02
Characterization of pavement texture by use of surface
profiles —
Part 1:
Determination of mean profile depth
Caractérisation de la texture d’un revêtement de chaussée à partir de relevés de profils de la surface —
Partie 1: Détermination de la profondeur moyenne du profil
ICS: 17.140.30; 93.080.20
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 13473-1:2017(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2017
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oSIST prEN ISO 13473-1:2017
ISO/DIS 13473-1:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
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ii © ISO 2017 – All rights reserved
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oSIST prEN ISO 13473-1:2017
ISO/DIS 13473-1:2017(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Test surfaces . 4
4.1 Condition of the surface . 4
4.2 Amount of data to be collected per field test section . 5
4.2.1 Continuous measurements . 5
4.2.2 Spot measurements . 5
4.3 Amount of data to be collected on laboratory samples . 5
5 Measurement instruments . 6
5.1 Instruments in general . 6
5.2 Vertical resolution . 6
5.3 Horizontal resolution . 6
5.4 Horizontal accuracy . 6
5.5 Measurement speed . 7
5.6 Alignment of sensor . 7
5.7 Bandwidth of sensor and recording system . 8
5.8 Performance check . 8
5.9 Indication of invalid readings (drop-outs) . 9
5.10 Sensitivity to vibrations . 9
6 Measurement procedure . 9
6.1 Performance checks. 9
6.2 Measurements . 9
6.3 Continuous or spot measurements . 9
7 Data processing procedure . 9
7.1 Introduction . 9
7.2 Summary of data processing steps .10
7.3 Drop-out correction .10
7.4 Resampling to a certain spatial resolution .12
7.5 Spike identification and reshaping the profile .12
7.6 Removal of long-wavelength components and normalization of profile sharpness .12
7.7 Segment limiting.13
7.8 Peak and MSD determination.13
7.9 Extreme MSD value removal (optional) .13
7.10 Averaging of MSD to determine the MPD .13
7.11 Calculation of ETD (optional) .13
8 Measurement uncertainty assessment according to ISO/IEC Guide 98-3 .14
9 Safety considerations .16
10 Test report .16
Annex A (informative) Texture ranges .17
Annex B (informative) Problems experienced on special surfaces .21
Annex C (informative) Procedure for sampling of Mean Segment Depth values .23
Annex D (informative) Data quality-enhancing procedures .26
Annex E (normative) Spike removal procedure .31
Annex F (informative) Measurement uncertainty .34
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Annex G (informative) Performance check .37
Annex H (informative) Flow charts for determination of MSD and MPD.40
Bibliography .43
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oSIST prEN ISO 13473-1:2017
ISO/DIS 13473-1:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.
This second edition cancels and replaces the first edition (ISO 13473-1:1997), which has been technically
revised.
A list of all parts in the ISO 13473- series can be found on the ISO website.
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Introduction
Road surface texture determines factors such as noise emission from the tyre/pavement interface,
acoustic comfort inside vehicles, friction between the tyre and road, rolling resistance and tyre wear.
Valid methods for measuring surface texture are therefore highly desirable.
The so-called ‘sand patch’ method, or the more general ‘volumetric patch’ method (see Clause 3,
Definitions) has been used worldwide for many years to give a single and very simple measurement
describing surface texture. It relies on a given volume of sand or glass beads which is spread out on
a surface. The material is distributed to form a circular patch, the diameter of which is measured. By
dividing the volume of material spread out by the area covered, a value is obtained which represents
the average depth of the sand or glass bead layer, i.e. a ‘Mean Texture Depth’. The method was originally
[25]
standardized in Annex A of ISO 10844:2014 in order to put limits concerning surface texture for a
reference surface used for vehicle noise testing but was later adopted by CEN as EN 13036-1.
The volumetric patch method is operator-dependent and can be used only on surfaces which are partly
or fully closed to traffic. Therefore, it is not practical for use in network surveys of roads, for example.
Along with developments in contactless surface profiling techniques, it has become possible to replace
the volumetric patch measurements with those derived from profile recordings, which are possible
to make by mobile equipment in flowing traffic. However, several very different techniques have been
used to calculate a ‘predicted mean texture depth’, many of them quite successfully. The values they
give are not always comparable, although individually they generally offer good correlation coefficients
with texture depth measured with the volumetric patch method.
It is, therefore, important to have a standardized method for measuring and evaluating the texture
depth by a more modern, safe and economical technique than the traditional volumetric patch method,
resulting in values which are directly compatible both with the patch-measured values and between
different equipment.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 13473-1:2017(E)
Characterization of pavement texture by use of surface
profiles —
Part 1:
Determination of mean profile depth
1 Scope
This part of ISO 13473 describes a test method to determine the average depth of pavement surface
macrotexture (see Clause 3, Definitions) by measuring the profile of a surface and calculating the
texture depth from this profile. The technique is designed to provide an average depth value of only
the pavement macrotexture and is considered insensitive to pavement microtexture and unevenness
characteristics.
The objective of this part of ISO 13473 is to make available an internationally accepted procedure for
determination of pavement surface texture depth which is an alternative to the traditionally used
volumetric patch technique (generally using sand or glass beads), giving comparable texture depth values.
Modern profilometers in use are almost entirely of the contactless type (e.g. laser or light slit to mention
a few) and this standard is intended for this type. However, a contact-type of profilometer may use
applicable parts of this standard.
This ISO 13473- series has been prepared as a result of a need identified when specifying a test surface
for vehicle noise measurement (ISO 10844). Macrotexture depth measurements according to this
International Standard are not generally adequate for specifying test conditions of vehicle or traffic
noise measurements, but have limited applications as a supplement in conjunction with other ways of
specifying a surfacing.
This test method is suitable for determining the Mean Profile Depth of a pavement surface. This Mean
Profile Depth can be transformed to a quantity which estimates the macrotexture depth according
to the volumetric patch method. It is applicable to field tests as well as laboratory tests on pavement
samples. When used in conjunction with other physical tests, the macrotexture depth values derived
from this test method are applicable to estimation of pavement skid resistance characteristics (see e.g.
[1]
reference in the Bibliography), estimation of noise characteristics, and assessment of the suitability
of paving materials or pavement finishing techniques.
The method, together with other measurements (where applicable), such as porosity or microtexture,
can be used to assess the quality of pavements.
This part of ISO 13473 is adapted for pavement texture measurement and is not intended for other
applications. Pavement aggregate particle shape, size, and distribution are surface texture features not
addressed in this procedure. The method is not meant to provide a complete assessment of pavement
surface texture characteristics. In particular, care should be exercised in interpreting the result if the
method is applied to porous surfaces or to grooved surfaces (see Annex B).
NOTE Other International Standards dealing with surface profiling methods include for example ISO 468 [2],
ISO 1878 [3], ISO 1879 [4], ISO 1880 [5], ISO 3274 [6], ISO 4287 [7][8] and ISO 4288 [9] (see the Bibliography).
Although it is not clearly stated in these, they are mainly used for measuring surface finish (microtexture) of
metal surfaces and were not intended to be applied to pavements.
© ISO 2017 – All rights reserved 1
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oSIST prEN ISO 13473-1:2017
ISO/DIS 13473-1:2017(E)
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/TS 13473-6, Verification procedure for the performance of contactless profilometers
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
measurement (GUM: 1995)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
texture wavelength
λ
quantity describing the horizontal dimension of the irregularities of a texture profile
Note 1 to entry: Texture wavelength is normally expressed in metres (m) or millimetres (mm).
3.2
texture
pavement texture
deviation of a pavement surface from a true planar surface, with a texture wavelength less than 0,5 m
3.3
surface profile
texture profile
upper contour of a vertical cross-section through a pavement
Note 1 to entry: Texture profile is similar to surface profile but limited to the texture range.
Note 2 to entry: The profile of the surface is described by two coordinates: one in the surface plane, called
distance (the abscissa), and the other in a direction normal to the surface plane, called vertical displacement
(the ordinate). An example is illustrated in Figure A.1. The distance may be in the longitudinal or lateral
(transverse) directions in relation to the travel direction on a pavement, or in a circle or any other direction
between these extremes.
Note 3 to entry: “Texture wavelength” is a descriptor of the wavelength components of the profile and is related
to the concept of the Fourier Transform of a series regularly sampled measurement points along a spatial axis. It
should also be noted that vertical displacement (height) has an arbitrary reference.
3.4
macrotexture
pavement macrotexture
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ISO/DIS 13473-1:2017(E)
deviation of a pavement surface from a true planar surface with the characteristic dimensions along
the surface of 0,5 mm to 50 mm, corresponding to texture wavelengths with one-third-octave bands
including the range 0,63 mm to 50 mm of centre wavelengths
Note 1 to entry: Peak-to-peak amplitudes may normally vary in the range 0,1 mm to 20 mm. This type of texture
is the texture which has wavelengths of the same order of size as tyre tread elements in the tyre/road interface.
Surfaces are normally designed with a sufficient macrotexture to obtain suitable water drainage in the tyre/road
interface. The macrotexture is obtained by suitable proportioning of the aggregate and mortar of the mix or by
surface finishing techniques.
Note 2 to entry: Based on physical relations between texture and friction/noise, etc., the World Road Association
(PIARC), originally defined the ranges of micro-, macro- and megatexture [10]. Figure A.2, which is a modified
version of the original PIARC figure, illustrates how these definitions cover certain ranges of surface texture
wavelength and spatial frequency. Note that ride discomfort includes effects experienced in and on motorised
road vehicles and bicycles, as well as wheelchairs and other vehicles used by disabled people.
3.5 Texture depth measurements
3.5.1
Texture Depth
TD
in the three-dimensional case, the distance between the surface and a plane through the top of the
three highest peaks within a surface area in the same order of a size as that of a car tyre/pavement
interface
Note 1 to entry: See Figure A.3.
3.5.2
Mean Texture Depth
MTD
texture depth obtained from the volumetric patch method
Note 1 to entry: In the application of the ‘volumetric patch method’ (see below) the ‘plane’ is in practice determined
by the contact between a rubber pad and the surface when the pad is rubbed over the area. Therefore, the texture
depth obtained in this case is not based on exactly a ‘plane’, but rather an approximation which is a somewhat
curved surface which is hard to define.
3.5.3
Profile Depth
PD
in the two-dimensional case; i.e. when studying a profile, the difference, within a certain
longitudinal/lateral distance in the same order of length as that of a car tyre/pavement contact interface,
between the profile and a horizontal line through the top of the highest peak within this profile
Note 1 to entry: See Figure A.4.
3.5.4
evaluation length
l
length of a portion of a profile for which MPD is to be calculated
3.5.5
reporting length
length of a pavement for which MPD is to be reported either as a single value for the entire length or for
a sequence of smaller sections
3.5.6
segment
portion of the profile over a length of 100 mm
Note 1 to entry: See Figure A.4.
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3.5.7
Mean Segment Depth
MSD
average value of the profile depth of a segment
Note 1 to entry: See Figure A.4.
3.5.8
Mean Profile Depth
MPD
average of the values of the Mean Segment Depth (MSD) of the tested section
3.5.9
Estimated Texture Depth
ETD
term used when the Mean Profile Depth (MPD) is used to estimate the Mean Texture Depth (MTD) by
means of a transformation equation
3.6
volumetric patch method
method relying on the spreading of a material, usually sand or graded glass beads, in a patch
Note 1 to entry: The material is distributed with a rubber pad to form an approximately circular patch, the average
diameter of which is measured. By dividing the volume of material by the area covered, a value is obtained which
represents the average depth of the layer, i.e. a ‘Mean Texture Depth’. The volumetric patch method is described
in EN 13036-1.
Note 2 to entry: The volumetric patch method is used not only with sand or glass beads as the patch material, but
in some cases with putty or grease. However, such materials have certain disadvantages, and for international
standardization only glass beads have been recommended. The ETD measure is based on glass beads as the patch
material.
3.7
drop-out
data in the measured profile indicated by the sensor as invalid
3.8
spike
unusually high and sharply defined peak in the measured profile, which is not part of the true profile,
and which is not automatically detected as invalid by the system
Note 1 to entry: See Annex E for a quantitative definition of a spike.
4 Test surfaces
4.1 Condition of the surface
Measurements shall not be made during rain or snow fall. Unless it has been demonstrated that the
equipment provides valid measurements on wet or damp surfaces, the surface shall be dry during the
measurements. It shall also be clean and reasonably free of debris and foreign objects.
NOTE 1 Optical-based measuring systems may not perform properly on newly laid asphalt surfaces which
are glossy and dark. If the test is performed during the paving process, optical distortions due to temperature
gradients in the air above the tested surface may produce invalid data.
NOTE 2 For roads which have been in service, the texture may vary across the pavement. In this case, the
transverse location of the measurement will normally be determined by the intended use of the data.
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4.2 Amount of data to be collected per field test section
4.2.1 Continuous measurements
Continuous measurements are made when a certain length of a road is measured with possible
interruptions of a maximum of 10 % of the length. The minimum evaluation length over which MPD is
calculated shall be 1,0 metre. It is not meaningful to report MPD over shorter lengths.
It is recommended that measurements and calculations be made continuously along the entire test
section.
4.2.2 Spot measurements
If a continuous measurement is not possible, as is the case for stationary devices, one may make
measurements at certain spots which are appropriately distributed. The following minimum
requirements apply:
— Each evaluation length shall include at least eight single measured segments of at least 100 mm
length. This would normally be along a straight line, but may also be in a circular path or in parallel
lines (in connection with 3D measurements). Each segment shall be measured continuously. The
exception is when analysing round laboratory samples; see 4.3.
— The procedure in Annex C is recommended to select measurement positions and evaluation lengths
...
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