SIST-TS CEN/TS 15901-9:2010

Road and airfield surface characteristics - Part 9: Procedure for determining the skid resistance of a pavement surface by measurement of the longitudinal friction coefficient (LFCD): DWWNL skid resistance trailer

This Technical Specification describes a method for determining the wet-road skid resistance of a surface by measuring the LFCD.
The method provides a measure of the wet-road skid resistance properties of a bound surface by measurement of the longitudinal friction coefficient at a fixed slip ratio of 86 % and at a controlled speed. The method has been developed for use on roads, but is also applicable to other paved areas such as airports.
This Technical Specification covers the following proprietary devices:
- DWWNL skid resistance trailer device, which has been developed by the Dienst Weg en Waterbouwkunde (DWW) of Rijkswaterstaat in the Netherlands. The device uses a standard PIARC smooth test tyre being dragged over a pre-wetted pavement under controlled speed conditions while its running direction is parallel to the direction of motion and perpendicular to the pavement. Several DWW skid resistance trailer devices have been manufactured under license and operate in combination with variable towing vehicles.

Oberflächeneigenschaften von Straßen und Flugplätzen - Teil 9: Verfahren zur Bestimmung der Griffigkeit von Fahrbahndecken durch Messung des Reibungskoeffizienten in Längsrichtung (LFCD): das RWS/NL-Griffigkeitsmessgerät (Anhänger)

Diese Technische Spezifikation beschreibt ein Verfahren für die Bestimmung der Nassgriffigkeit von Fahrbahndecken durch Messung des LFCD.
Dieses Verfahren liefert ein Maß für die Nassgriffigkeitseigenschaften einer gebundenen Oberfläche durch Messung des Reibungskoeffizienten in Längsrichtung bei einem festen Schlupfverhältnis von 86 % und gere-gelter Geschwindigkeit. Dieses Verfahren wurde für die Anwendung auf Straßen entwickelt, es lässt sich aber auch auf andere befestigte Flächen, wie z. B. Flugplätze, anwenden.
Diese Technische Spezifikation behandelt den Betrieb des folgenden eigentumsrechtlich geschützten Mess-geräts:
-   das vom Rijkswaterstaat (RWS) in den Niederlanden entwickelte RWSNL-Griffigkeitsmessgerät (Anhänger). Dieses Messgerät verwendet einen genormten profillosen PIARC-Messreifen, der mit geregelter Geschwindigkeit über eine zuvor angenässte Fahrbahn gezogen wird, wobei seine Laufrichtung parallel zur Fahrtrichtung und rechtwinklig zur Fahrbahndecke ist. Es werden mehrere RWS-Griffigkeitsmessgeräte in Lizenz hergestellt, die sich in Verbindung mit unterschiedlichen Schleppfahrzeugen verwenden lassen.

Caractéristiques de surface des routes et aéroports - Partie 9: Mode opératoire de détermination de l'adhérence d'un revêtement de chaussée en procédant au mesurage du coefficient de frottement longitudinal (CFLD) : la remorque d'adhérence DWW NL

Značilnosti cestnih in vzletnih površin - 9. del: Postopek določanja torne sposobnosti vozne površine z meritvijo količnika trenja (LFCD): DWWNL

Ta tehnična specifikacija opisuje metodo določanja torne sposobnosti površine mokre ceste z meritvijo LFCT. Ta metoda določa merilo lastnosti torne sposobnosti omejene površine mokre ceste z meritvijo količnika trenja pri kontroliranem zdrsnem zaostanku kolesa na 86 % in pri nadzorovani hitrosti. Ta metoda je bila razvita za uporabo na cestah, vendar se uporablja tudi za druge vozne površine, kot so letališča. Ta tehnična specifikacija zajema naslednjo zaščiteno opremo: RWSNL priklopna oprema za merjenje torne sposobnosti, ki jo je razvilo podjetje Rijkswaterstaat iz Nizozemske. Oprema uporablja standardno PIARC pnevmatiko za preskus gladkosti, s katero se zavira na predhodno namočeni površini pod nadzorovanimi pogoji upora in hitrosti, medtem ko je njena smer vožnje vzporedna s smerjo gibanja in navpična na površino. Več RWS priklopne opreme za merjenje torne sposobnosti je bilo proizvedene pod licenco in deluje v kombinaciji s spremenljivimi vlačilci.

General Information

• Status: Published
• Publication Date: 21-Jan-2010
• ICS: 17.040.20 - Properties of surfaces
• ICS: 93.080.10 - Road construction
• ICS: 93.120 - Construction of airports
• Technical Committee: CES - Roads
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 23-Nov-2009
• Due Date: 28-Jan-2010
• Completion Date: 22-Jan-2010
• Ref Project: CEN/TS 15901-9:2009 - Road and airfield surface characteristics - Part 9: Procedure for determining the skid resistance of a pavement surface by measurement of the longitudinal friction coefficient (LFCD): DWWNL skid resistance trailer

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CEN/TS 15901-9:2010
01-februar-2010
=QDþLOQRVWLFHVWQLKLQY]OHWQLKSRYUãLQGHO3RVWRSHNGRORþDQMDWRUQH
VSRVREQRVWLYR]QHSRYUãLQH]PHULWYLMRNROLþQLNDWUHQMD/)&''::1/
Road and airfield surface characteristics - Part 9: Procedure for determining the skid
resistance of a pavement surface by measurement of the longitudinal friction coefficient
(LFCD): DWWNL skid resistance trailer
Oberflächeneigenschaften von Straßen und Flugplätzen - Teil 9: Verfahren zur
Bestimmung der Griffigkeit von Fahrbahndecken durch Messung des
Reibungskoeffizienten in Längsrichtung (LFCD): das RWS/NL-Griffigkeitsmessgerät
(Anhänger)
Caractéristiques de surface des routes et aéroports - Partie 9: Mode opératoire de
détermination de l'adhérence d'un revêtement de chaussée en procédant au mesurage
du coefficient de frottement longitudinal (CFLD) : la remorque d'adhérence DWW NL
Ta slovenski standard je istoveten z: CEN/TS 15901-9:2009
ICS:
17.040.20 Lastnosti površin Properties of surfaces
93.080.10 Gradnja cest Road construction
93.120 *UDGQMDOHWDOLãþ Construction of airports
SIST-TS CEN/TS 15901-9:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN/TS 15901-9:2010

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SIST-TS CEN/TS 15901-9:2010


TECHNICAL SPECIFICATION
CEN/TS 15901-9

SPÉCIFICATION TECHNIQUE

TECHNISCHE SPEZIFIKATION
November 2009
ICS 93.080.20
English Version
Road and airfield surface characteristics - Part 9: Procedure for
determining the skid resistance of a pavement surface by
measurement of the longitudinal friction coefficient (LFCD):
DWWNL skid resistance trailer
Caractéristiques de surface des routes et aéroports - Partie Oberflächeneigenschaften von Straßen und Flugplätzen -
9 : Mode opératoire de détermination de l'adhérence d'un
Teil 9: Verfahren zur Bestimmung der Griffigkeit von
revêtement de chaussée en procédant au mesurage du Fahrbahndecken durch Messung des
coefficient de frottement longitudinal (CFLD) : la remorque Reibungskoeffizienten in Längsrichtung (LFCD): das
d'adhérence DWW NL DWW/NL-Griffigkeitsmessgerät (Anhänger)
This Technical Specification (CEN/TS) was approved by CEN on 27 June 2009 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15901-9:2009: E
worldwide for CEN national Members.

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CEN/TS 15901-9:2009 (E)
Contents Page
Foreword .3
1 Scope .4
2 Fields of application .4
3 Terms and definitions .4
4 Safety .6
5 Principle of measurements and description of the device .7
5.1 Principle of measurements .7
5.2 Description of the device .7
6 Key characteristics .7
6.1 General .7
6.2 Test speed .7
6.3 Distance measuring .8
6.4 Slip ratio .8
6.5 Static wheel load .8
6.6 Horizontal load measuring unit .8
6.7 Test wheel assembly .8
6.8 Test tyre .8
6.9 Sampling interval .9
6.10 Pavement wetting system, water film thickness .9
6.11 General requirements for measuring system .9
7 Test Procedure .9
7.1 Standard test conditions .9
7.2 Prior to testing . 10
7.3 Testing . 10
8 Data recording . 11
9 Calibration . 11
9.1 Static calibration . 11
9.2 Dynamic Monthly Correlation Trial (MCT) . 11
10 Accuracy . 12
11 Test report . 12

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SIST-TS CEN/TS 15901-9:2010
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Foreword
This document (CEN/TS 15901-9:2009) has been prepared by Technical Committee CEN/TC 227 “Road
materials”, the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
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SIST-TS CEN/TS 15901-9:2010
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1 Scope
This Technical Specification describes a method for determining the wet-road skid resistance of a surface by
measuring the LFCD.
The method provides a measure of the wet-road skid resistance properties of a bound surface by
measurement of the longitudinal friction coefficient at a fixed slip ratio of 86 % and at a controlled speed. The
method has been developed for use on roads, but is also applicable to other paved areas such as airports.
This Technical Specification covers the following proprietary devices:
RWS skid resistance trailer device, which has been developed by the Rijkswaterstaat in the Netherlands.
NL
The device uses a standard PIARC smooth test tyre being dragged over a pre-wetted pavement under
controlled speed conditions while its running direction is parallel to the direction of motion and perpendicular to
the pavement. Several RWS skid resistance trailer devices have been manufactured under license and
operate in combination with variable towing vehicles.
2 Fields of application
The method provides a means for the evaluation of the skid resistance of a road surface. It is suitable for use
in the following situations:
 routine measurements of a road in service, either network monitoring for Pavement Management, or
measurements on project-level;
 approval of new works;
 research measurements.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
skid resistance
characterisation of the friction of a road surface when measured in accordance with a standardised method
3.2
wet-road skid resistance
property of a trafficked surface that limits relative movement between the surface and the part of a vehicle tyre
in contact with the surface, when lubricated with a film of water
NOTE Factors that contribute to skid resistance include the tyre pressure, contact area, tread pattern, and rubber
composition; the alignment, texture, surface contamination, and characteristics of the road surface; the vehicle speed; and
the weather conditions.
The skid resistance of a road surface in Europe varies seasonally. Generally, wet skid resistance is higher in winter as a
result of the effects of wet detritus and the effects of frost and wear by tyres on microtexture and macrotexture. Wet skid
resistance is lower in summer as a result of dry polishing by tyres in the presence of fine detritus.
The change in skid resistance of a surface in service is affected by the volume of traffic and the composition of the traffic,
i.e. cars, buses, commercial vehicles of different sizes, as the tyres of these vehicles polish and/or wear away the
surfacing material in different ways. The geometry of the road will affect the change in skid resistance. Generally, tyres
polish less on straight roads than on bends.
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Where the surface contains aggregate with a coating of binder, e.g. bitumen, resin or Portland cement, the skid resistance
will change as the coating is worn away by tyres.
3.3
bound surface
top layer or surface course of a road with the aggregates secured permanently in place
NOTE Aggregates are commonly secured in place by bitumen or Portland cement.
3.4
calibration
periodic adjustment of the offset, the gain and the linearity of the output of a measurement method so that all
the calibrated devices of a particular type deliver the same value within a known and accepted range of
uncertainty, when measuring under identical conditions within given boundaries or parameters
3.5
contact area
overall area of the road surface instantaneously in contact with a tyre
NOTE This term describes the overall area generally covered by the tyre. Due to the effects of surface texture or any
tyre tread pattern, not all of the tyre or road surface in the contact area can be in contact at any instant.
3.6
RWS skid resistance trailer
NL
device developed by the Rijkswaterstaat in the Netherlands that uses the longitudinal force principle to make
routine measurements of skid resistance continuously
NOTE All devices are manufactured under license from RWS.
3.7
longitudinal friction coefficient
ratio between horizontal force (drag) and vertical load (load) for a braked wheel in controlled conditions, which
is normally a decimal number quoted to two significant figures
NOTE LFC varies depending on the slip ratio of the device and the operational speed.
3.8
LFCD
longitudinal friction coefficient measured with a device conforming with this Technical Specification
3.9
operating speed
speed at which the device traverses the test surface
3.10
repeatability
r
maximum difference expected between two measurements made by the same machine, with the same tyre,
operated by the same crew on the same section of road in a short space of time, with a probability of 95 %
3.11
reproducibility
R
maximum difference expected between two measurements made by different machines with different tyres
using different crews on the same section of road in a short space of time, with a probability of 95 %
3.12
slip speed
relative speed between the test tyre and the travelled surface in the contact area
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3.13
slip ratio
slip speed divided by the operating speed
3.14
sampling interval
distance over which responses of the sensors are sampled to determine a single measurement of the
recorded variables
NOTE 1 The sampling length depends upon the detailed operation of device and its recording system; a number of
samples may be combined to determine a measurement for a subsection.
NOTE 2 This should not be confused with horizontal resolution which is the shortest distance over which a change in
the measured parameter can be detected.
3.15
test section
length of road between defined points (e.g. location references, specific features, or measured distances)
comprising a number of subsections over which a continuous sequence of measurements is made
3.16
theoretical water film thickness
theoretical thickness of a water film deposited on the surface in front of the measuring tyre, assuming the
surface has zero texture depth
3.17
wheelpath
part of the pavement surface where the majority of vehicle wheel passes are concentrated
NOTE The wh
...