CEN/TS 15901-5:2009

Road and airfield surface characteristics - Part 5: Procedure for determining the skid resistance of a pavement surface using a device with longitudinal controlled slip (LFCRDK): ROAR (Road Analyser and Recorder of Norsemeter)

This Technical Specification describes a method for determining the skid resistance of a surface by measurement of the longitudinal friction coefficient LFCN.
The method provides a measure of the wet skid resistance properties of a bound surface by measurement of the longitudinal friction coefficient using a continuous reading braked wheel fixed-slip device.
The test tyre is dragged over a pre-wetted pavement under controlled speed conditions while the test tyre is parallel to the direction of motion and perpendicular to the pavement.
This Technical Specification covers the operation of the Road Analyser and Recorder of Norsemeter (ROAR). The fixed slip ratio is 20 %.
A machine conforming to the general characteristics of the ROAR and the specific provisions of this Technical Specification may also be used for the tests.
In addition to friction measurements, to determine the macrotexture of the pavement surface a laser system is used. This system is placed in front of the towing vehicle in order to measure the macrotexture (mean profile depth - MPD) on dry pavements and on the same path as the skid resistance measurement is done. The standard for this measurement and the device is described in EN ISO 13473-1.
The skid resistance of a pavement is determined by friction measurements and measurements of pavement texture. The skid resistance may be reported either as friction measurement or as a combination of friction and texture measurements.

Oberflächeneigenschaften von Straßen und Flugplätzen - Teil 5: Verfahren zur Bestimmung der Griffigkeit von Fahrbahndecken durch Verwendung eines Geräts mit geregeltem Schlupf in Längsrichtung (LFCRDK): das in Dänemark verwendete ROAR-Gerät (Road Analyser and Recorder of Norsemeter)

Diese Technische Spezifikation beschreibt ein Verfahren für die Bestimmung der Griffigkeit von Fahrbahn-decken durch Messung des Reibungskoeffizienten in Längsrichtung LFCN.
Das Verfahren liefert ein Maß für die Nassgriffigkeitseigenschaften einer gebundenen Oberfläche durch Mes-sung des Reibungskoeffizienten in Längsrichtung mit Hilfe eines kontinuierlich messenden Messfahrzeugs mit gebremstem Rad und festem Schlupf.
Der Messreifen wird mit geregelter Geschwindigkeit über eine zuvor angenässte Fahrbahndecke gezogen, wobei er parallel zur Bewegungsrichtung und rechtwinklig zur Fahrbahn läuft.
Diese Technische Spezifikation behandelt den Betrieb des ROAR-Geräts (en: Road Analyser and Recorder) von Norsemeter. Das feste Schlupfverhältnis beträgt 20 %.
Für diese Prüfungen darf auch ein Messgerät verwendet werden, das den allgemeinen Merkmalen des ROAR-Geräts und den speziellen Vorgaben dieser Technischen Spezifikation entspricht.
Zusätzlich zu den Reibungsmessungen wird zur Bestimmung der Makrotextur der Fahrbahndecke ein Laser-system verwendet. Dieses System wird vor dem Schleppfahrzeug angeordnet, um die Messung der Makrotex¬tur (bzw. der mittleren Profiltiefe, MPD) auf der trockenen Fahrbahn und auf der für die Griffigkeitsmessungen verwendeten Messstrecke zu ermöglichen. Das Normverfahren für diese Messung und das dafür zu verwen¬dende Messgerät sind in EN ISO 13473 1 beschrieben.
Die Griffigkeit einer Fahrbahn wird durch Reibungsmessungen und Messungen der Textur der Fahrbahndecke ermittelt. Die Griffigkeit kann entweder als Reibungsmessung oder als eine Kombination aus Reibungs- und Texturmessung angegeben werden.

Caractéristiques de surface des routes et aéroports - Partie 5 : Mode opératoire de détermination de l'adhérence d'un revêtement de chaussée à l'aide d'un dispositif à frottement longitudinal contrôlé (CFLRDK) : le ROAR (Analyseur de Route et Enregistreur du Norsemeter)

Le présent document décrit une méthode permettant de déterminer l’adhérence d’une surface par mesure du coefficient de frottement longitudinal CFLDDK.
La méthode permet de déterminer les propriétés d’adhérence d’une surface limitée mouillée en mesurant le coefficient de frottement longitudinal à l’aide d’un appareil de mesure en continu dont le taux de glissement de la roue freinée est constant.
Le pneumatique d’essai est traîné sur une chaussée préalablement mouillée, dans des conditions contrôlées de vitesse, parallèle à la direction du mouvement et perpendiculaire à la chaussée.
La présente Spécification technique porte sur le système ROAR (Road Analyser and Recorder) de Norsemeter. Le taux de glissement fixe est de 20 %.
Pour les essais, il est également possible d’utiliser une machine conforme aux caractéristiques générales du système ROAR et aux dispositions particulières de la présente Spécification technique.
Outre les mesures du frottement, un système laser est utilisé pour déterminer la macrotexture de la chaussée. Ce système est placé devant le véhicule tracteur afin de mesurer la macrotexture (profondeur moyenne du profil - PMP) sur des chaussées sèches, sur la même trace que la mesure de frottement. Cette mesure et le dispositif correspondant sont présentés dans l’EN ISO 13473-1.
L’adhérence d’une chaussée est déterminée par mesures du frottement et de la texture de la chaussée. L’adhérence peut être reportée sous forme de mesure du frottement ou d’une combinaison de mesures du frottement et de la texture.

Značilnosti cestnih in vzletnih površin - 5. del: Postopek določanja torne sposobnosti vozne površine z opremo za vzdolžne meritve s kontroliranim drsenjem (LFCRDK): ROAR (Road Analyser and Recorder of Norsemeter)

Ta tehnična specifikacija opisuje metodo določanja torne sposobnosti površine z meritvijo količnika trenja LFCN. Metoda določa merilo lastnosti tornih sposobnosti mokre omejene površine z merjenjem količnika trenja z opremo za neprekinjeno pregledovanje kontrolirane zdrsnosti zavornega kolesa. S preskusno pnevmatiko se zavira na predhodno namočeni površini pod nadzorovanimi pogoji upora in hitrosti, medtem ko je preskusna pnevmatika vzporedna s smerjo gibanja in navpična na površino. Ta tehnična specifikacija zajema delovanje opreme Road Analyser and Recorder of Norsemeter (ROAR). Kontroliran zdrsni zaostanek kolesa je 20 %. Za preskuse se lahko uporablja tudi stroj, ki ustreza splošnim značilnostim opreme ROAR in posebnim določbam te tehnične specifikacije. Za določevanje makroteksture vozne površine se poleg meritev trenja  uporablja laserski sistem. Ta sistem je nameščen pred vozilo za vleko, da se meri makrotekstura (povprečna globina profila – MDP) suhih površin in na isti stezi, na kateri se izvaja meritev torne sposobnosti. Standard za to meritev in napravo je opisan v EN ISO 13473-1. Torna sposobnost površine je določena z meritvami trenja in meritvami teksture površine. Torna sposobnost je lahko predstavljena bodisi kot meritev trenja ali kot kombinacija meritev trenja in teksture.

General Information

• Status: Published
• Publication Date: 17-Nov-2009
• ICS: 93.080.20 - Road construction materials
• ICS: 93.120 - Construction of airports
• Technical Committee: CEN/TC 227 - Road materials
• Drafting Committee: CEN/TC 227/WG 5 - Surface characteristics
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 26-Jun-2012
• Completion Date: 26-Jun-2012
• Ref Project: SIST-TS CEN/TS 15901-5:2010 - Road and airfield surface characteristics - Part 5: Procedure for determining the skid resistance of a pavement surface using a device with longitudinal controlled slip (LFCRDK): ROAR (Road Analyser and Recorder of Norsemeter)

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2010
=QDþLOQRVWLFHVWQLKLQY]OHWQLKSRYUãLQGHO3RVWRSHNGRORþDQMDWRUQH
VSRVREQRVWLYR]QHSRYUãLQH]RSUHPR]DY]GROåQHPHULWYHVNRQWUROLUDQLP
GUVHQMHP/)&5'.52$55RDG$QDO\VHUDQG5HFRUGHURI1RUVHPHWHU
Road and airfield surface characteristics - Part 5: Procedure for determining the skid
resistance of a pavement surface using a device with longitudinal controlled slip
(LFCRDK): ROAR (Road Analyser and Recorder of Norsemeter)
Verfahren zur Bestimmung der Griffigkeit von Fahrbahndecken durch Verwendung eines
Geräts mit geregeltem Schlupf in Längsrichtung (LFCRDK): das in Dänemark
verwendete ROAR-Gerät (Road Analyser und Recorder of Norsemeter)
Caractéristiques de surface des routes et aéroports - Partie 5 : Mode opératoire de
détermination de l'adhérence d'un revêtement de chaussée à l'aide d'un dispositif à
frottement longitudinal contrôlé (CFLRDK) : le ROAR (Analyseur de Route et
Enregistreur du Norsemeter)
Ta slovenski standard je istoveten z: CEN/TS 15901-5:2009
ICS:
17.040.20 Lastnosti površin Properties of surfaces
93.080.10 Gradnja cest Road construction
93.120 *UDGQMDOHWDOLãþ Construction of airports
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN/TS 15901-5
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
November 2009
ICS 93.080.20
English Version
Road and airfield surface characteristics - Part 5: Procedure for
determining the skid resistance of a pavement surface using a
device with longitudinal controlled slip (LFCRDK): ROAR (Road
Analyser and Recorder of Norsemeter)
Caractéristiques de surface des routes et aéroports - Partie Oberflächeneigenschaften von Straßen und Flugplätzen -
5 : Mode opératoire de détermination de l'adhérence d'un
Teil 5: Verfahren zur Bestimmung der Griffigkeit von
revêtement de chaussée à l'aide d'un dispositif à frottement Fahrbahndecken durch Verwendung eines Geräts mit
longitudinal contrôlé (CFLRDK) : le ROAR (Analyseur de geregeltem Schlupf in Längsrichtung (LFCRDK): das in
Route et Enregistreur du Norsemeter) Dänemark verwendete ROAR-Gerät (Road Analyser and
Recorder of Norsemeter)
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 15901-5:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Recommended uses .4
4 Terms and definitions .5
5 Safety .7
6 Essential characteristics .7
6.1 Principle of measurements .7
6.2 Description of ROAR .7
7 Key characteristics .8
7.1 General .8
7.2 Test speed .8
7.3 Braking system .8
7.4 Static wheel load .8
7.5 Test wheel arrangement .8
7.6 Test tyre .8
7.7 Minimum sampling interval .9
7.8 Pavement wetting system, water film thickness .9
7.9 General requirements for measuring system .9
7.10 Parameters recorded .9
8 Test procedure . 10
8.1 Standard test conditions . 10
8.2 Prior to testing . 10
8.3 Testing . 10
9 Data recording . 10
10 Calibration . 11
11 Accuracy . 11
12 Test report . 11
Bibliography . 13

Foreword
This document (CEN/TS 15901-5:2009) 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.
1 Scope
This Technical Specification describes a method for determining the skid resistance of a surface by
measurement of the longitudinal friction coefficient LFCN.
The method provides a measure of the wet skid resistance properties of a bound surface by measurement of
the longitudinal friction coefficient using a continuous reading braked wheel fixed-slip device.
The test tyre is dragged over a pre-wetted pavement under controlled speed conditions while the test tyre is
parallel to the direction of motion and perpendicular to the pavement.
This Technical Specification covers the operation of the Road Analyser and Recorder of Norsemeter (ROAR).
The fixed slip ratio is 20 %.
A machine conforming to the general characteristics of the ROAR and the specific provisions of this Technical
Specification may also be used for the tests.
In addition to friction measurements, to determine the macrotexture of the pavement surface a laser system is
used. This system is placed in front of the towing vehicle in order to measure the macrotexture (mean profile
depth – MPD) on dry pavements and on the same path as the skid resistance measurement is done. The
standard for this measurement and the device is described in EN ISO 13473-1.
The skid resistance of a pavement is determined by friction measurements and measurements of pavement
texture. The skid resistance may be reported either as friction measurement or as a combination of friction
and texture measurements.
2 Normative references
The following referenced documents are indispensable for the application 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.
EN ISO 13473-1, Characterization of pavement texture by use of surface profiles – Part 1: Determination of
Mean Profile Depth (ISO 13473-1:1997)
ISO 13473-2, Characterization of pavement texture by use of surface profiles – Part 2: Terminology and basic
requirements related to pavement texture profile analysis
3 Recommended uses
The ROAR is used in the following fields of application:
 network monitoring (Pavement Management);
 approval of new surfacing;
 measurements for project-level compliance;
 investigation of surface skid resistance;
 comparative measurements among different devices;
 research measurements.
4 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4.1
friction
resistance to relative motion between two bodies in contact, the frictional force being the force, acting
tangentially in the contact area, which is measured by a friction-measuring device
4.2
braking force coefficient
ratio between the longitudinal frictional force and the load on the test tyre, the test tyre mass and the rim mass,
which is without dimension
4.3
skid resistance
characterisation of the friction of a road surface when measured in accordance with a standardised method
4.4
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 are tyre pressure, contact area, tread pattern and rubber
composition: the alignment, texture, surface contamination and characteristics of the road surface, vehicle speed and
weather conditions.
The skid resistance of a 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 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.
Where the surface contains aggregate with a coating of binders, e.g. bitumen, resin or Portland cement, the skid
resistance can change as the coating is worn away by tyres.
4.5
friction coefficient ROAR
µ
ratio between the horizontal force in the direction of the motion that can be activated between the test wheel
and the wet pavement and the vertical wheel load accomplished under controlled slipping conditions
NOTE The controlled slipping condition is achieved by a hydraulic brake system. If the vehicle is in motion, the test
wheel slides or slips in the forward direction.
4.6
microtexture
deviation of a pavement from a true planar pavement with characteristic dimensions along the pavement of
less than 0,5 mm, corresponding to texture wavelengths with one-third-octave bands and up to 0,5 mm centre
wavelengths
NOTE 1 Peak to peak amplitudes normally vary in the range 0,001 mm to 0,5 mm.
NOTE 2 Microtexture is a primary component in skid resistance at slow speeds. Those devices that utilize a relatively
low slip speed primarily
...