SIST EN 1423:1999/A1:2004
(Amendment)Road marking materials - Drop on materials - Glass beads, antiskid aggregates and mixtures of the two
Road marking materials - Drop on materials - Glass beads, antiskid aggregates and mixtures of the two
This European Standard specifies the requirements for laboratory tests (Product 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 beads: granulometry, refractive index of the glass, chemical resistance, quality, surface treatments; - antiskid aggregates: granulometry, chemical characteristics, friability, colours.
Straßenmarkierungsmaterialien - Nachstreumittel - Markierungs-Glasperlen, Griffigkeitsmittel und Nachstreugemische
Produits de marquage routier - Produits de saupoudrage - Microbilles de verre, granulats antidérapants et mélange de ces deux composants
Materiali za označevanje vozišča – Materiali za posipanje – Steklene kroglice, posipi za zmanjšanje drsnosti in mešanice obeh
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 1423:1999/A1:2004
01-januar-2004
0DWHULDOL]DR]QDþHYDQMHYR]LãþD±0DWHULDOL]DSRVLSDQMH±6WHNOHQHNURJOLFH
SRVLSL]D]PDQMãDQMHGUVQRVWLLQPHãDQLFHREHK
Road marking materials - Drop on materials - Glass beads, antiskid aggregates and
mixtures of the two
Straßenmarkierungsmaterialien - Nachstreumittel - Markierungs-Glasperlen,
Griffigkeitsmittel und 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: EN 1423:1997/A1:2003
ICS:
93.080.20
SIST EN 1423:1999/A1:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 1423:1997/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2003
ICS 93.080.20
English version
Road marking materials - Drop 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 und
ces deux composants Nachstreugemische
This amendment A1 modifies the European Standard EN 1423:1997; it was approved by CEN on 2 May 2003.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Management Centre or to any CEN member.
This amendment 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 Management Centre has the same status as the official versions.
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. EN 1423:1997/A1:2003 E
worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
EN 1423:1997/A1:2003 (E)
Foreword
This document (EN 1423:1997/A1:2003) has been prepared by Technical Committee CEN/TC 226 “Road
equipment”, the secretariat of which is held by AFNOR.
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 January 2004, and conflicting national standards shall be withdrawn at the latest
by April 2005.
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 EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
This amendment is included in a package with EN 1463-1:1997/prA1 and EN 13212:2001, with a common DOW
fixed on 2003-09-30.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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.
2
---------------------- Page: 3 ----------------------
EN 1423:1997/A1:2003 (E)
Amendments of Technical nature:
Page 3, add two new sentences to the foreword
•
• Add the following amendments, originally included in document CEN/TC226 N503E and that
correspond to the above mentioned EN 1423:1997/A1 (amendment):
• Page 5/4.1, delete a part of the second paragraph
• Page 6/4.4, complete the first paragraph
• Page 7/4.4, complete the second paragraph and table 4
• Page 8/5.1, modify the maximum value for the pH (9,5 instead of 9,0)
Page 8/5.4, delete a part of the second paragraph
•
• Page 10, delete clause 8 “Marking”
th
• Page 15/Annex B-B.4.1, deletion and substitution of the 4 item
st
• Page 19/Annex C-C.8, deletion and substitution of the 1 paragraph
• Page 29, after Annex G, add a new Annex H (informative)
End of the standard, after (new) Annex H, add Annex ZA (informative)
•
Amendments of Editorial nature:
• Page 4/clause 2 “Normative references”, add the following references mentioned in
amendment A1:
EN 13212:2001 Road marking materials – Requirements for the factory
production control
EN ISO 5725 Precision of test methods – Determination of repeatability and
reproducibility for a standard test method by inter-
laboratory tests
• Page 8/5.2 “Friability index”, delete the NOTE.
(reason: not needed and wrong information)
• Page 12/A.2.2 “Liquids with known refractive index”:
- replace "cedar oil" by cedar wood oil"
- replace "diphenylethylen" by "1,1 - diphenylethylen"
- replace "monobromnaphthalin" by "1-bromnaphthalin"
(reason: those terms are not correct)
- delete "methylen iodide"
3
---------------------- Page: 4 ----------------------
EN 1423:1997/A1:2003 (E)
(reason: is the same as "diiodomethane")
- delete "arsenic tribromide"
(reason: very dangerous substance)
4
---------------------- Page: 5 ----------------------
EN 1423:1997/A1:2003 (E)
Foreword
• At the end, add the following sentence related to the “transitional period”:
Twelve (12) months after the date of publication of the harmonised part of this European standard
(Annex ZA) in the Official Journal of the European Communities (which follows its availability and
notification to the European Commission by CEN/CENELEC), compliance with all the provisions of the
Construction Products Directive (CE-marking) becomes compulsory for all products falling within the
scope of this European standard that are placed on the EEA market.
• The following (two) sentences shall be added after the first paragraph of the foreword:
This document has been prepared under a mandate given to CEN by the European Commission and the
Free Trade Association and support essential requirements of EU Directive(s).
For relationship with the Construction Products Directive (89/106/EEC), see informative Annex ZA, which
is an integral part of this document.
5
---------------------- Page: 6 ----------------------
EN 1423:1997/A1:2003 (E)
Page 5: Chapter 4.1 “Granulometry”
Delete a part of the second paragraph as follows:
"For a period of 5 years after the date of publication of this European Standard existing national
standard granulometries can be used, even if they use sieves other than those defined in ISO 565
- Sizes R 40. Thereafter,”
The second paragraph shall be:
Granulometries shall be described by selecting sieves in accordance with the following rules
(see Table 1)
Page 6: Chapter 4.4 “Quality requirements”
Complete the first paragraph as follows:
"When tested in accordance with annex D (reference method), glass beads with imperfections as
described in annex C, shall be considered defective.
Page 7: Chapter 4.4 “Quality requirements”
• Complete the paragraph (beginning) above Table 4, as follows:
Using the reference method, and taking into consideration only one defect per bead,…"
• Replace Table 4 as follows:
Diameter of glass beads Maximum weighted Maximum weighted
percentage of defective percentage of grains and
1)
mm
glass beads foreign particles
% %
< 1 20 3
> 1 30 3
1) 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) of EN 1423:1997 shall be always considered as the reference test
method.
Page 8: Chapter 5.1 “Chemical characteristics”
Modification of the text, as follows:
"When tested in accordance with ISO 787-9, the pH value of the antiskid aggregates shall be not less
than 5 and not greater than 9.5"
6
---------------------- Page: 7 ----------------------
EN 1423:1997/A1:2003 (E)
Page 8: Chapter 5.4 “Granulometry”
Delete a part of the second paragraph as follows:
For a period of 5 years after the date of publication of this European Standard existing national
standard granulometries can be used, even if they use sieves other than those defined in ISO 565
- Sizes R 40. Thereafter, granulometries shall be described by selecting sieves in accordance
with the following rules (also see Table 1):
Page 10: Chapter 8 “Marking”
Delete the complete Clause 8.
Page 15: Annex B/B.4.1 “Apparatus and reagents”
th
• Delete the sentence (4 item):
a solution, containing by mass : * 50 % sodium sulfide as Na S ;
2
* 48 % distilled water;
* 2 % anionic wetting agent (1)
• and replace it by:
a saturated solution of sodium sulphide in distilled water at 20 ºC with the addition of 2,0 %
anionic wetting agent
Page 19: Annex C/C.8 “Gas inclusions (see Figure C.8)”
Replace the existing paragraph by the following text:
When the ratio of the sum of the projected area of the bubbles inside a glass bead to the
i
projected area of the glass bead S is greater than 0,25 (/S > 0,25), the glass bead is
i
considered defective.
7
---------------------- Page: 8 ----------------------
EN 1423:1997/A1:2003 (E)
Page 29 (new): add Annex H (informative)
Annex H
(informative)
Alternative test methods to determine the quality of glass beads
H.1 Scope
This annex establishes two alternative methods to determine the quality of glass beads. The test
method defined in Annex D shall be considered as the reference test method.
These alternative methods incorporate the correlated values to be used, in accordance with the
maximum weighted percentage of defective glass beads given in Table 4.
H.2 VISUAL TEST METHOD
H.2.1 Equipment and materials
- A complete series of 1/1 splitters.
- A projector shall be fitted with a 25 x magnification lens placed at a distance which gives an image diameter
of between 750 mm and 800 mm onto a screen provided with a 500 mm square screen divided into 25
squares, or an optical magnifying device which allows a glass bead projection of between 50 and 150 units.
- A plane base capsule, between 60 mm and 70 mm in internal diameter or a glass plate with a minimum area
of 700 mm2.
- A silicone grease or a transparent adhesive tape.
- A liquid with a similar refractive index to that of the glass beads.
H.2.2 Procedure
A representative sample of an approximate mass of 0,3 g shall be prepared by reductions with splitters
1/1.
The representative sample so obtained is placed in the plane base capsule, previously wetted with a thin
coat of silicone grease, or on a transparent adhesive tape, distributed uniformly in order to cover
completely the square part of the screen with a single thickness of glass beads.
In case of obtaining a projection of over 150 glass beads, the count of the total number of glass beads is
made in three alternate diagonal squares. The obtained number is multiplied by 25 and is divided by 3.
In case of obtaining a projection of below 150 glass beads, the counting operation will include the total
glass beads in the visual field. The total number of glass beads shall include between 150 and 400.
8
---------------------- Page: 9 ----------------------
EN 1423:1997/A1:2003 (E)
After that, a second count is made of the number of non-round defective glass beads existing in the
whole squared screen, that is to say oval, satellites, tear shaped, fused together, roundish glass beads,
grains and foreign particles.
The sample is then covered by the liquid with refraction index similar to glass beads. In these conditions,
only the shape of those will be seen, and the glass inclusions will appear as black spots.
A third count is made of the number of round defective glass beads existing in the whole squared
screen, that is to say those which present black spots over 25 % of their surface, opaque and milky glass
beads.
The defective glass beads will be counted only once although they present several defects.
H.2.3 Results of counting
The percentage of defective glass beads will be calculated by the formula:
Md = (100 x Nmd)/Nm
Where Md is the percentage of defective glass beads
Nmd is the total number of defective glass beads resulting from the sum obtained in
those last two counts.
Nm is the total number of glass beads
The final result of Md is the average of, at least, three determinations.
H.2.4 Correlated values
When this alternative visual test method is used, the maximum weighted percentage of defective glass
beads, as defined in Table 4, shall comply with Table H.1.
Table H.1 - Maximum weighted percentage of defective glass beads
Diameter of glass beads Maximum weighted percentage of Maximum weighted percentage of
defective glass beads grains and foreign particles
mm
% %
< 1 18 3
> 1 28 3
9
---------------------- Page: 10 ----------------------
EN 1423:1997/A1:2003 (E)
H.3AUTOMATIC TEST METHOD
H.3.1. Principle
The method is applicable to glass beads with particle diameters of between 0,08 mm and 1 mm used for
road marking purposes.
The method relies upon: the optical properties of glass microbeads and defects to visually separate out
these elements; and image analysis techniques to determine the percentage of defects of the glass
microbeads.
The glass beads spread onto an opaque and shiny adhesive base (tape) are observed using reflected
light through a microscope lens.
The glass beads applied onto the adhesive tape constitute the test specimen.
The distinction between the specimen's various elements is governed by the phenomena of specular
reflection, diffusion and retro-reflection.
Under these observation conditions:
-the supporting base is reflective;
-the glass beads are both reflective and retro-reflective;
-the defects exhibit the same properties as the glass beads, but are less retro-reflective; they may be
diffusive;
The specimen is positioned perpendicularly to the optical axis. This experimental set-up makes it
possible to visually separate the glass beads, the defects and the supporting base. In these conditions:
- the observed spherically-shaped glass beads appear grey in colour;
- defects of beads appear darker than spherically-shaped glass beads;
- the supporting base appears white in colour.
H.3.2. Equipment
The measurement device consist of: an optical component that allows the observation of the test
specimen under reflected light, an image-acquisition system, and a software program to coordinate
image acquisition and processing
Optical system (see Figure H.1)
As regards both lighting and observation, the optical system is composed of microscope parts.
The selected lens provides for a 2.5x enlargement capacity and a 0,075 digital aperture.
The specimen is placed on a three axis mobile table:
-vertical motion allows focus adjustment;
-longitudinal and transversal motions allow the observation of various parts of the specimen.
10
---------------------- Page: 11 ----------------------
EN 1423:1997/A1:2003 (E)
In order to observe the specimen, the table shall be capable of rotating around its longitudinal axis.
The light intensity can be adjusted by means of a system of filters and diaphragms.
The acquisition and processing system comprises:
-a camera fastened to the optical system and a video screen;
-a computer;
- a specialized interface between the camera and the computer.
11
---------------------- Page: 12 ----------------------
EN 1423:1997/A1:2003 (E)
Key
1 Camera 8 Rotation
2 Source filter 9 Vertical
3 Camera filter 10 Transversal
4 Source 11 Longitudinal
5 Diaphragm F 12 Glass beads
6 Diaphragm A 13 Semi-reflective mirror
7 Table
Figure H.1 - Diagram of the optical system
12
---------------------- Page: 13 ----------------------
EN 1423:1997/A1:2003 (E)
H.3.3. Image analysis
These techniques allow for the automatic separation of those elements displaying different grey levels
and then performing the series of calculations necessary to obtain the percentage of defects.
Determination of the percentage of defects in the glass microbeads consists of:
-computing a grey-level histogram of the image (pixels) ;
-computing the surface area occupied by each category of object (defects/glass beads/
supporting base) in the picture on the basis of the histogram generated.
NOTE The graphic should show enough contrast to enable each category of object to be identified by a peak on the
histogram (see Figure H.2)
Key 1
1. Supporting base
2. Glass beads
3. Defects
X. Grey level
Y. % of grey levels
Figure H.2 - Sample histogram of the levels of grey.
The normalized histogram of the shades of grey for all of the specimen's pictures exhibits three modes;
their separation is
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.