oSIST prEN 1423:2009

SLOVENSKI STANDARD
oSIST prEN 1423:2009
01-februar-2009
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Road marking materials - Drops on materials - Glass beads, antiskid aggregates and
mixtures of the two
Straßenmarkierungsmaterialien - Nachstreumittel - Glasperlen, Griffigkeitsmittel,
Nachstreugemische
Produits de marquage routier - Produits de saupoudrage - Microbilles de verre, granulats
antidérapants et mélange de ces deux composants
Ta slovenski standard je istoveten z: prEN 1423
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
oSIST prEN 1423:2009 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1423:2009

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oSIST prEN 1423:2009
EUROPEAN STANDARD
DRAFT
prEN 1423
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2008
ICS 93.080.20 Will supersede EN 1423:1997
English Version
Road marking materials - Drops on materials - Glass beads,
antiskid aggregates and mixtures of the two
Produits de marquage routier - Produits de saupoudrage - Straßenmarkierungsmaterialien - Nachstreumittel -
Microbilles de verre, granulats antidérapants et mélange de Markierungs-Glasperlen, Griffigkeitsmittel,
ces deux composants Nachstreugemische
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 226.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre has the
same status as the official versions.
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.
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.
: This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
Warning
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1423:2008: E
worldwide for CEN national Members.

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oSIST prEN 1423:2009
prEN 1423:2008 (E)
Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Definitions .5
4 Requirements for glass beads .5
5 Requirements for antiskid aggregates .8
6 Mixture of glass beads and antiskid aggregates.9
7 Sampling.10
8 Evaluation of conformity.10
9 Marking .13
Annex A ( normative )  Test method to determine the refractive index of the glass beads.14
Annex B (normative)  Test methods to determine the resistance of the glass beads to the effects of
water, hydrochloric acid, calcium chloride and sodium ulphide.17
Annex C (normative)  Glass bead imperfections.19
Annex D (normative)  Test method to determine the quality of the glass beads.23
Annex E (normative)  Test method to determine the presence of the moisture proof coating.25
Annex F (normative) Test method to determine the presence of floatation coating.27
Annex G (normative)  Test method to determine the friability index of the antiskid aggregates .28
Annex H (informative) Alternative test methods to determine the percentage of defective of glass
beads.31
H.2.2 Procedure .31
H.2.3 Results of counting .32
Annex I (normative) Test Method to determine the presence of dangerous substances. .38
Annex J (Normative) Test method to determine glass beads and aggregates ratio in mixture.39
Annex ZA (Informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive.40
Bibliography .49

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oSIST prEN 1423:2009
prEN 1423:2008 (E)
Foreword
This document (prEN 1423:2008) has been prepared by Technical Committee CEN/TC 226 “Road equipment”, the
secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1423:1997.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this document.

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oSIST prEN 1423:2009
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1 Scope
This European Standard specifies the requirements for laboratory tests (production control) and qualification
procedures for the following drop on materials used in road markings.

These materials are dropped on to paints, thermoplastics, cold plastics and any other marking product applied in a
liquid state, immediately after application to the road surface.

The requirements taken into consideration in this standard are:

- glass bead : raw material nature, chemical composition, granulometry, refractive index of the glass, chemical
resistance, quality, surface treatment ;

- antiskid aggregate : chemical characteristics, friability, colour, granulometry ;

- mixture of glass beads and antiskid aggregates : the requirements for both components.

2 Normative references
This European Standard 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
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies.

IS0 565, Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings
IS0 787-9, General methods of test for pigments and extenders -
Part 9: Determination of pH value of an aqueous suspension
IS0 2591-1, Test sieving - Part 1: Methods using test sieves of woven wire cloth and perforated metal plate
ISO 3310-1, Test sieves: Technical requirements and check
EN ISO 5725, Precision of test methods – Determination of repeatability and reproducibility for a standard test
method by inter-laboratory test
IS0 7724-2 , Paints and varnishes - Colorimetry - Part 2: Colour measurement
ISO/CIE 10526, CIE Standard colorimetric illuminants
EN 12802, Road marking materials – Laboratory methods for identification
EN 13212, Road marking materials – Requirements for the factory production control
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3 Definitions
For the purpose of this product standard, the following definitions apply:

3.1
types of drop-on materials

3.1.1
glass bead
transparent spherical glass particle, used to provide night visibility for the road markings by retroreflecting the
incident headlight beams of a vehicle towards the driver.
This product is defined by four characteristics: refractive index, quality, granulometry, resistance to chemicals. In
addition, surface treatment with its intended use shall be declared by manufacturer (if any).

3.1.2
antiskid aggregate
hard grain of natural or artificial origin, used to provide antiskid qualities for the road markings.
This product is defined by two characteristics: granulometry, friability index. For non-transparent antiskid aggregate
only, third characteristic is color co-ordinates and luminance factor.

3.1.3
mixture of glass beads and antiskid aggregates
this product is a combination of here above product criterias and their relative ratio.

3.2
intermediate bulk container (IBC)
container with a capacity of up to 1300 kg, used as an intermediate solution in between bags and tins (25 kg to 50
kg) and bulk transport.
4 Requirements for glass beads
4.1 Dangerous substances
In order to check the content of arsenic, lead and antimony, the glass beads shall be tested in accordance with
annex I
Each element (As, Pb, Sb) shall be separately classified into one of the three following classes:

- Class 0: NPD
- Class 1: ≤ 1000 ppm
- Class 2: ≤ 200 ppm

4.2 Granulometry
The granulometry of the glass beads shall be described giving the minimum and the maximum percentages by
mass of the cumulative retained glass beads on metal wire cloth test sieves: IS0 565 - Sizes R 40/3 using the test
sieving procedure defined in IS0 2591-1.
Granulometries shall be described by selecting sieves in accordance with the following rules (also see table 1):

- the upper safety sieve shall retain less than 0 % to 2 % of the total mass of the glass beads ;
- the upper nominal sieve shall retain 2% to 10 % of the beads ;
- if necessary, intermediate sieves shall be added to limit the ratio between the nominal sizes of openings of
two successive sieves to a maximum of 1,7 : 1 ;
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- for each of the intermediate sieves, the range by mass between the minimum N % and the maximum N %
1 2
of the cumulative retained percentages shall be not more than 40 % (N - N ≤ 40) ;
2 1
- the lower nominal sieve shall retain 95 % to 100 % of the beads.

Table 1 - Selecting sieves for glass beads

Sieves IS0 565 R 40/3 Cumulative retained mass

%

upper safety 0 to 2

upper nominal 0 to 10

intermediate N to N
1 2

lower nominal 95 to 100

Examples of the interpretation of the rules to specify the granulometry of glass beads are given in table 2 and
Table 3.
Table 2 - Example 1: 425-90 microns
Sieves IS0 565 R 40/3 Cumulative retained mass
µm %
500 0 to 2
425 0 to 10
250 20 to 60
150 60 to 95
90 95 to 100

Table 3 - Example 2: 600-125 microns
Sieves IS0 565 R 40/3 Cumulative retained mass
µm %
710 0 to 2
600 0 to 10
355 30 to 70
212 70 to 100
125 95 to 100


The reference method to determine the granulometry of the glass beads is IS0 2591-1

4.3 Refractive index
The refractive index n of the glass beads, shall be determined in accordance with annex A. It shall conform to the
following classes:

Class A : n ≥ 1,5;

Class B : n ≥ 1,7;

Class C : n ≥ 1,9.

4.4 Resistance to chemicals : water, hydrochloric acid, calcium chloride and sodium sulphide
The resistance shall be determined in accordance with annex B and glass beads shall not develop any surface
haze or dulling when in contact with any of the following: water, hydrochloric acid, calcium chloride and sodium
sulfide.

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4.5 Quality requirements
The reference method of testing quality is described in annex D; glass beads with imperfections as described in
annex C shall be considered defective.
Quality of glass beads = 100% minus total weighted percentage of defective glass beads.

Applying the reference method and taking into consideration only one defect per bead, the maximum weighted
percentage of defective beads shall be 20 % including a maximum of 3 % of grains and foreign particles (see table 4).
If a granulometry includes beads with diameters lower than 1 mm and diameters equal to or greater than 1 mm they
shall be separated by means of a sieve with nominal sizes of openings of 1 mm and checked separately.

Table 4 - Maximum weighted percentage of defective glass beads
Diameter of glass beads Maximum weighted Maximum weighted
mm percentage of defective percentage of grains and

glass beads foreign particles
% %
<  1 20 3
20 3
≥ 1

1) Checking separately the glass beads with diameters lower than 1mm and diameters equal to or greater
than 1mm, the quality of each fraction shall be recorded separately in the results of counting.

2) When alternative test methods are used as in Annex H (informative) of this European Standard, the
correlated values shall be applied. Method described in annex D (normative) shall be always considered
as the reference test method.

4.6 Surface treatments of the glass beads
Special coatings may be applied to the surface of the glass beads to enhance their properties.

4.6.1 Moisture proof coating

When the manufacturer declares the presence of a moisture proof coating the glass beads shall be tested in
accordance with annex E. When procedure A of annex E is used 80 % of the glass beads shall pass the test
showing the presence of the moisture proof coating. When procedure B of annex E is used the glass beads shall
pass the test without any flow stoppage. When procedure A fails procedure B shall be used.

4.6.2 Floatation coating

When the manufacturer declares the presence of a floatation coating the glass beads shall be tested in accordance
with annex F. When procedure of annex F is not applicable, then an alternative test method shall be declared by
the manufacturer.

4.6.3 Adhesion coating

When the manufacturer declares the presence of an adhesion coating it shall be proved by testing the glass beads
in accordance with a test method declared by the manufacturer.

4.6.4 Other coatings

When the manufacturer declares the presence of a coating, other than those in 4.6.1, 4.6.2 and 4.6.3, it shall be
proved by testing the glass beads in accordance with a test method declared by the manufacturer.

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5 Requirements for antiskid aggregates

5.1 Chemical characteristics

5.1.1 pH value

The pH value of the antiskid aggregates shall be determined in accordance with ISO 787-9. The ph value shall be
not less than 5 and not greater than 11.

5.1.2 Dangerous substances

In order to check the content of arsenic, lead and antimony, the glass aggregates shall be tested in accordance
with annex I
Each element (As, Pb, Sb) shall be separately classified into one of the following three classes:

- Class 0: NPD
- Class 1: ≤ 1000 ppm
- Class 2: ≤ 200 ppm

5.2 Friability index
The friability index of the antiskid aggregates shall be determined in accordance with annex G.
The maximum value of the friability index shall be indicated in the data sheet of the product.

5.3 Colour co-ordinates and luminance factor
If the antiskid aggregate is not transparent, the chromaticity co-ordinates and the luminance factor shall be
determined in accordance with IS0 7724-2. The chromaticity co-ordinates shall lie inside the region defined by the
corner points given in table 5 and the luminance factor ß shall be greater than 0,70 :

Table 5 - Corner points of the chromaticity regions for non transparent antiskid aggregates
1
Corner point No. 2 3 4
X
0,355 0,305 0,285 0,335
y 0,355 0,305 0,325 0,375

Sample preparation; since the grains of the antiskid aggregates are not fine
enough to form a tablet when pressed without a binder, as done for the barium sulphate reflectance standard
in accordance with IS0 7724-2, the antiskid aggregates are pressed as for the BaSO standard in IS0 7724-2
4
; but after removing the glass the material is kept in the container with the uncovered surface upward in a
horizontal position for illumination and observation.

5.4 Granulometry
The granulometry of the antiskid aggregates shall be described giving the minimum and the maximum
percentages, by mass, of the cumulative retained particles on metal wire cloth test sieves IS0 565 - sizes R 40/3 -
using the test sieving procedure defined in IS0 2591-1.

Granulometries shall be described by selecting sieves in accordance with the following rules (also see table 6):

- the upper safety sieve shall retain less than 2 % of the total mass of the antiskid aggregates ;
- the upper nominal sieve shall retain 0 % to 10 % of the aggregates ;
- if necessary, intermediate sieves shall be added to limit the ratio between the nominal sizes of openings of
two successive sieves to a maximum of 1,7 to 1 ;
- for each of the intermediate sieves, the range by mass between the minimum N % and the maximum N %
1 2
of the cumulative retained percentages shall be not more than 40 % (N - N ≤ 40) ;
2 1
- the lower nominal sieve shall retain 95 % to 100 % of the aggregates ;
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- the lower safety sieve shall retain 99 % to 100 % of the aggregates; this sieve shall not be lower than 90
microns.

Table 6 - Selecting sieves for aggregates
Sieves IS0 565 Cumulative retained mass
%
R 40/3
upper safety 0 to 2
upper nominal 0 to 10
N to N
intermediate
1 2
lower nominal 95 to 100
lower safety 99 to 100

Examples of the interpretation of the rules to specify the granulometry of the antiskid aggregates are given in table
7 and table 8.

Table 7 - Example 3: 710-150 microns

Sieves IS0 565 Cumulative retained mass
R 40/3
%

1  mm 0 to 2
710 µm 0 to 10
425 µm 5 to 25
250 µm 40 to 80
150 µm 95 to l00
90 µm 99 to 100

Table 8 - Example 4: 1000-150 microns

Sieves IS0 565 Cumulative retained mass
R40/3
%
1,18 mm 0 to 2
1 mm 0 to 10
600 µm 10to 50
355 µm 50 to 80
212 µm 85 to 100
150 µm 95 to 100
90 µm 99 to 100

6 Mixture of glass beads and antiskid aggregates

In a mixture of glass beads and antiskid aggregates the glass beads shall conform to clause 4 and the antiskid
aggregates shall conform to clause 5 of this product standard. The tests on the glass beads and the antiskid
aggregates to be incorporated in mixtures shall be conducted separately before mixing.

In order to check the relative ratio between glass beads and antiskid aggregates in a mixture, the test method
described in annex J shall be used.


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7 Sampling

In order to test glass beads, antiskid aggregates and mixtures of them a representative sample of the material to be
tested shall be taken as follows.

The drop on material sample shall be taken from at least three bags or one Intermediate Bulk
Container (IBC).

When M, in kilogramms, is the mass of the drop on material to be tested, at least 1,5 kg of the material shall be
taken by inserting an appropriate probe in the full height of a certain number 'S' of bags, or inserting the probe S
times in the whole height of an IBC. The probe shall be driven to the bottom of the bag, in an upright position, or
into the IBC containing the material to be tested.

Another possibility to take a representative sample from the S bags is to use a 1/1 splitter.

S is calculated by the formula: S =  M / 150; and it shall be rounded up to the next higher unit

A representative sample shall be obtained by mixing the material taken with the S insertions of the probe in the
bags. The representative sample shall be split by means of a 1/1 splitter in the number of samples necessary for
the tests.

NOTE: A test probe can be constructed from a tube of 28 mm to 34 mm diameter and 1000 mm to 1200
mm in length. The end of the probe which reaches the bottom of the bag or the IBC should be fitted with a
plugging system. After penetration of the probe to the full depth of the bag or the IBC, the plug is inserted
and the probe removed. The contents of the probe represent a single sample of the material to be tested.

When sampling into the IBC, if the test probe can not go to the full depth of the container, the following alternative
method shall be used:
- a quantity of 20kg +/- 1 kg shall be removed from the IBC in a bucket
- the content of the bucket shall be split by means of a 1/1 splitter in the number of samples necessary
for the tests.


8 Evaluation of conformity

8.1 General
The conformity of drop on materials with the requirements of this European Standard and with the declared values
shall be demonstrated by:

- initial type testing;
- factory production control by the manufacturer, including product assessment.

The initial type testing shall be performed for each production unit separately and on each distinct granulometry.
For the purposes of testing, the drop on materials may be grouped into families, where it is considered that the
results for one or more characteristics from any one product within the family are representative for that same
characteristics for all drop on materials within that same family (a product may be in different families for different
characteristics). The only characteristics where the grouping in families are allowed are:
- for glass beads: refractive index and resistance to water , hydrochloric acid, calcium chloride and sodium
sulphide
- for antiskid aggregates: friability index ; if the antiskid aggregates are not transparent : colour co-ordinates
and luminance factor

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8.2 Initial type testing (ITT)
8.2.1 General

An initial type test is the complete set of tests or other procedures, in respect of the characteristics to be assessed,
determining the performance of samples of products representative of the product type.

Initial type testing shall be performed to show conformity with this European Standard for glass beads, anti-skid
aggregates and mixtures being put onto the market and:
- at the beginning of the production of a new or modified glass bead, anti-skid aggregate, a change to
the raw material or supplier of the components where this could affect the performance of the
product,
- at the beginning of a new or modified method of production.

If ITT is the responsibility of a certification body (e.g. for regulatory marking),
- the certification body is responsible for the sampling for the initial type test of the product;
- the certification body checks if the initial type test is carried out according to the provisions of this
standard;
- the manufacturer has to demonstrate that the samples are representative for the product (industrial
product);
- the certification body decides if the grouping is acceptable and/or verifies it by testing some samples
of the family.

8.2.2 Characteristics

All characteristics in Clauses 4 and 5 shall be subject to initial type testing.

8.2.3. Sampling, testing and compliance criteria

Initial type testing shall be performed on samples of products representative for the manufactured products
(industrial production, no prototype production on lab scale) .

8.2.3.1 Sampling procedure

If Initial type testing is the responsibility of a certification body the certification body (e.g. for regulatory marking)
shall evaluate the representativity of the sampled product (comparison with available test result(s) of FPC for this
product).
The method of sampling shall be as defined in clause 7 of this European standard.

8.2.3.2 Testing and conformity criteria

For each type of drop-on product the number of characteristics to be assessed shall be in accordance with table 9.

Table 9 – Number of characteristics, number of samples and conformity criteria for initial type testing

Characteristic Requirement Number of
clause samples /tests
by product or
family
(*1)
Refractive index (of the glass beads) 4.3 2 / family
Granulometry 4.2 and/or 5.4 1 / product
Quality ( proportion of defective glass beads) 4.5 1/ product
(*1)
Colour co-ordinates (x,y), of non-transparent anti-skid 5.3 2 / family
aggregates
(*1)
Luminance factor (ß), of non-transparent anti-skid 5.3 2 / family
aggregates.
(*1)
Resistance to chemicals (for glass beads) 4.4 2 / family
(*1)
Resistance to fragmentation (for anti-skid aggregates) 5.2 2 / family

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(*1)
As long as there is only one product in the family only one sample has to be tested for ITT. From 2 products on
a second product has to be sampled to carry out an ITT of this characteristic to show the results for this
characteristic are representative for all drop on material within this same family. (See clause 8.1 of this standard)

The result of all type tests shall be reported by the certification body and held by the manufacturer for at least 5
years after the last date of production of the product(s) to which they apply.

8.3 Factory Production control (FPC)
The rules for FPC are given in EN 13212.

8.4 Inspection of the factory production control
When required, inspection of the factory and of the factory production control shall be made on the provisions
contained in EN 13212 and clause 8.4 of this standard.

8.4.1 Initial inspection of the factory and the Factory Production Control

The initial inspection shall:
- Check that the producer’s FPC system complies with all the requirements of this product standard.
- Visit the production unit, review the resources and check the practical application of the system of
Factory Production Control.

The certification body shall verify whether all requirements of EN 13212 have been dealt with appropriately in the
production control manual and related documents. If this is not the case the certification body will inform the
producer of the non-compliances found and request corrective action, including an updated version of the
documents if necessary.

During the initial inspection the certification body will investigate whether the documented system is implemented in
accordance with the requirements of EN 13212. Items found not to be in compliance are classified as either
observations, remarks or non-conformities. These will all be reported to the producer at the end of the initial
inspection.

The initial type testing (ITT) is not part of the FPC, but has to be carried out in accordance with the test methods
and systems of attestation of conformity described in this standard. (see 8.2.1)

Test results from the FPC shall comply with the requirements of the appropriate part of EN 13212 and the product
specification (manufacturer’s stated values as referred to in clause ZA.1 of Annex ZA of the relevant product
standard). The manufacturer’s stated values and a procedure for the evaluation of the test results shall therefore be
part of the FPC-system.

Results of production control tests of the drop on material relating to this product standard shall be available at the
time of the initial inspection.

Even if on
...