ENV 12633:2003

SLOVENSKI STANDARD
01-julij-2003
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Method of determination of unpolished and polished slip/skid resistance value
Verfahren zur Bestimmung des Griffigkeitsbeiwertes vor und nach Polierung
Méthode de détermination de la valeur de résistance au dérapage/a la glissance des
pavés polis ou non polis
Ta slovenski standard je istoveten z: ENV 12633:2003
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN PRESTANDARD
ENV 12633
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
January 2003
ICS 93.080.20
English version
Method of determination of unpolished and polished slip/skid
resistance value
Méthode de détermination de la valeur de résistance au Verfahren zur Bestimmung des Griffigkeitsbeiwertes vor
dérapage/à la glissance des pavés polis ou non polis und nach Polierung
This European Prestandard (ENV) was approved by CEN on 21 November 2002 as a prospective standard for provisional application.
The period of validity of this ENV 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 ENV can be converted into a European Standard.
CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final
decision about the possible conversion of the ENV into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 12633:2003 E
worldwide for CEN national Members.

Contents
page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Principle.5
4 Apparatus .5
5 Sampling.8
6 Determination of the unpolished slip/skid resistance value (USRV).8
7 Determination of the polished slip/skid resistance value (PSRV) .8
7.1 Preparation of test specimen.8
7.2 Accelerated polishing procedure.9
7.3 Validation of polishing procedure.10
8 Test report .10
Annex A (normative)  Method for the determination of unpolished slip/skid resistance value (USRV)
and polished slip/skid resistance value (PSRV).11
A.1 Principle.11
A.2 Apparatus .11
A.2.1 Pendulum friction tester.11
A.3 Calibration .16
A.4 Procedure .16
A.4.1 Validation of the pendulum test equipment .16
A.4.2 Test procedure .16
A.5 Calculation of test results.17
A.5.1 Unpolished slip resistance value (USRV).17
A.5.2 Polished slip resistance value (PSRV) .17
Annex B (normative)  Procedure for checking the state of a pendulum tester .18
B.1 Standard surface.19
B.1.1 Determination of the pendulum value .19
B.1.2 Product units as standard surfaces.19
B.1.3 Abrasive papers as standard surfaces.19
Annex C (normative)  Sample selection and preparation .20
C.1 Flow chart .20
C.2 Measurement of flatness.21
C.3 Small units.21
C.3.1 General.21
C.3.2 Equipment.21
C.3.3 Procedure .21
Annex D (informative)  Preparation of reference material specimens.23
D.1 Reference material.23
D.2 Apparatus and equipment.23
D.3 Preparation of reference material specimens.24
Bibliography .25
Foreword
This document (ENV 12633:2003) has been prepared by Technical Committee CEN/TC 178 "Paving units and
kerbs", the secretariat of which is held by BSI.
Annexes A, B and C are normative. Annex D is informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this European Prestandard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
Introduction
Health and safety aspects
WARNING: The application of emery polishing agents during the course of the operations described in this
European Prestandard can generate particles that could be injurious to health. It is essential to ensure that
appropriate precautions are taken, e.g. the use of dust masks and/or dust extracting facilities. It is also essential to
ensure that the equipment is electrically safe in wet test conditions.
1 Scope
This European Prestandard describes a laboratory method for determining the unpolished slip/skid resistance value
(USRV) and the polished slip/skid resistance value (PSRV) of paving units using a flat-bed polishing machine in
conjunction with pendulum test equipment.
2 Normative references
This European Prestandard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Prestandard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (Hardness between 10 IRHD and
100 IRHD).
ISO 3310, Test sieves – Technical requirements and testing.
ISO 4662, Rubber — Determination of rebound resilience of vulcanizates.
ISO 7619, Rubber — Determination of indentation hardness by means of pocket hardness meters.
3 Principle
The test methodology for determining the slip/skid resistance values of paving units consists of measuring the
pendulum value of a sample, before and/or after polishing with a flat-bed polishing machine, using the pendulum
test equipment.
4 Apparatus
4.1 Straight-edge.
4.2 Set of feeler gauges with a width of (6 ± 1) mm capable of measuring with an accuracy to 0,05 mm.
4.3 Pendulum test equipment conforming to A.2.
4.4 Flat-bed polishing machine (see Figure 1) comprising the following:
Key
1  Sample holder 5  Emery hoppers with adjustable conveyors
2  Sample 6  Polishing lap
3  Adjustable mass 7  Rubber annulus
4  Water supply
Figure 1 — Flat-bed polishing machine
a) a machined, flat circular cast iron or steel grinding/polishing lap not less than (600 ± 3) mm in diameter, which
can be rotated in a horizontal plane at a speed of (29 ± 1) r/min;
b) a flat smooth-surfaced styrene butadiene rubber annulus of (600 ± 3) mm external diameter, approximately
(320 ± 3) mm internal diameter and (9 ± 1) mm thickness, attached to the upper surface;
The rubber annulus shall have an initial hardness of (69 ± 3) IRHD in accordance with ISO 48. It shall be
covered by a certificate of conformity from the manufacturer which includes the date of manufacture. It shall be
stored in the dark at a temperature in the range 5 °C to 25 °C and shall be conditioned by bringing to a uniform
temperature of (20 ± 5) °C before attaching to the grinding plate. After attachment, the grinding plate and
annulus shall be kept in the dark at a temperature in the range (20 ± 5) °C. The annulus shall not be used after
three years from the date of manufacture or after testing 500 specimens.
If glue is used to attach the annulus to the grinding plate, care shall be taken to ensure it does not affect the
hardness of the rubber.
c) two adjustable metal holders capable of loosely holding in place the (150 ± 2 excluding at least one 5-8 mm
chamfer) mm · (85 ± 2 excluding at least one 5-8 mm chamfer) mm specimens;
d) means of locating two specimens within the two holders according to the following configuration:
 with the centre points of their outer edges (270 ± 1) mm from the centre of the lap;
 positioned diametrically opposite to each other;
 with their long sides lying in the direction of rotation of the lap.
The specimens shall be free to move in a vertical plane but be restrained from moving in the horizontal plane.
e) means to ensure that the required load can be applied evenly at the centre of each test specimen and which
can move in a vertical direction;
f) weights which permit uniform loading of the test specimen against the surface of the rubber annulus and which,
including test specimen, tray (if used) and adjustable weight, will provide a contact stress of (2 250 ± 50) Pa
over the area of the final prepared contact surface;
NOTE This stress corresponds to a total mass of 2,924 kg for an area of 150 mm · 85 mm.
g) separate mechanisms to feed corn emery and emery flour and a means to feed water.
Figure 2 — Position of the paving units onto the Flat-bed polishing machine
4.5 Polishing media, consisting of the following:
a) unused natural corn emery, of a grading
...