Bsi bs en 00846 13 2001

Unknown BRITISH STANDARD BS EN 846 13 2001 Methods of test for ancillary components for masonry — Part 13 Determination of resistance to impact, abrasion and corrosion of organic coatings The European[.]

BRITISH STANDARD

846-13:2001

Methods of test for

ancillary components

for masonry —

Part 13: Determination of resistance to

impact, abrasion and corrosion of

organic coatings

The European Standard EN 846-13:2001 has the status of a

British Standard

ICS 91.080.30

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

This British Standard, having

been prepared under the

direction of the Sector Policy

and Strategy Committee for

Building and Civil

Engineering, was published

under the authority of the

Standards Policy and Strategy

Committee on

13 December 2001

© BSI 13 December 2001

ISBN 0 580 38784 4

National foreword

This British Standard is the official English language version of

EN 846-13:2001.

EN 846-13 is a supporting standard to the forthcoming “harmonized” European product standard specifications on ancillary components for masonry,

EN 845-1 and EN 845-2 These standards are the subject of transitional arrangements agreed under the Commission mandate The Member States have agreed a nominal transition period for the co-existence of these standards and their corresponding national standard(s) It is intended that this period will comprise a nominal nine month period during which any required changes

to national regulations are to be made, followed by a further nominal twelve month period for the implementation of CE marking At the end of this co-existence period, the national standard(s) will be withdrawn In the UK there are no corresponding national standards to EN 846-13.

The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated tests, to Subcommittee B/519/1, Masonry units, which has the responsibility to:

A list of organizations represented on this subcommittee can be obtained on request to its secretary.

Cross-references

The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic

Catalogue.

A British Standard does not purport to include all the necessary provisions of

a contract Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

— aid enquirers to understand the text;

— present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;

— monitor related international and European developments and promulgate them in the UK.

Summary of pages

This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover.

The BSI copyright date displayed in this document indicates when the document was last issued.

Amendments issued since publication

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 846-13

August 2001

ICS 91.080.30

English version Methods of test for ancillary components for masonry — Part 13: Determination of resistance to impact, abrasion and

corrosion of organic coatings

Méthodes d'essai pour composants accessoires de

maçonnerie — Partie 13: Détermination de la résistance à

l'impact, à l'abrasion et à la corrosion des protections

organiques

Prüfverfahren für Ergänzungsbauteile für Mauerwerk — Teil 13: Bestimmung der Schlagfestigkeit, des Abriebwiderstands und der Korrosionsbeständigkeit von

organischen Beschichtungen

This European Standard was approved by CEN on 23 June 2001.

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 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 European Standard 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2001 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members.

Ref No EN 846-13:2001 E

Page

Foreword 3

1 Scope 4

2 Normative references 4

3 Principle 4

4 Sampling 4

5 Apparatus 5

6 Determination of impact resistance 9

7 Determination of abrasion resistance 10

8 Accelerated corrosion test 11

9 Test report 13

Foreword

This European Standard has been prepared by Technical Committee CEN/TC 125, Masonry, the Secretariat of which is held by BSI

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 February 2002, and conflicting national

standards shall be withdrawn at the latest by February 2002

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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom

1 Scope

This European Standard specifies a method for determining the level of performance of those organic coatings classified in prEN 845-1 and prEN 845-2 as type 2 applied as a protective

system to zinc coated steel plate used in the fabrication of ancillary components for masonry

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 (including amendments)

EN 197-1, Cement — Part 1: Composition, specifications and conformity criteria for common

cements.

BS 871:19811, Specification for abrasive paper and cloths.

3 Principle

The performance of organic coatings is determined from tests for impact resistance, abrasion resistance and an accelerated corrosion test The impact and abrasion resistance are

determined using a heavy rigid pendulum apparatus whereby the spring loaded tip of the

pendulum strikes the test specimen at a specified distance from bottom dead centre The

accelerated corrosion performance is determined from the electrical resistance of the organic coating during a period of exposure to an alkaline solution

4 Sampling

4.1 Sampling for impact and abrasion tests

The minimum number of specimens for each test shall be six, plus two further specimens, if

required (see 6.2) Test specimens shall be flat plate not less than 300 mm long x 50 mm wide

either:

— cut from a sample of the product, where practicable; or

— purpose made and protected using a process identical to that used to protect the product

Where specimens are to be cut from a product, they shall be spaced not less than 300 mm apart

NOTE It is critical to use flat plate since any undulations in the metal will cause local high or low spots.

1 Published by the British Standards Institution, 389 Chiswick High Rd., London W4 4AL.

4.2 Sampling for accelerated corrosion test

The minimum number of specimens shall be three, see 8.1.1 Test specimens shall be flat

plate chosen to suit the test cell dimensions (see Figure 3) but shall preferably be not less

than 250 mm long x 100 mm wide either:

— cut from a sample of the product, where practicable; or

— cut from galvanized steel plate to the specification used to produce the product

Where specimens are to be cut from a product, they shall be spaced not less than 300 mm

apart

5 Apparatus

5.1 Tolerances

The permissible deviation on masses of the apparatus shall be ±10 g and on apparatus

dimensions ±1 %

5.2 Impact and abrasion tests apparatus

5.2.1 Steel pendulum

5.2.2 A typical steel pendulum is shown in Figure 1 Its mass acting at centre of action is

8,71 kg The pendulum tip for the impact test is 0,5 mm thick and 3 mm wide and made

from hardened carbon steel The form of the tip used is shown in Figure 2 This is attached to

the pendulum such as to produce a 3 mm wide impact strip (i.e with the flat dimension

perpendicular to the swing direction of the pendulum)

5.2.3 The pendulum tip used for the abrasion test is of hemi-cylindrical profile, radius

12,5 mm and length 12 mm, and made from hardened carbon steel The tip is covered with

first quality blue twill emery cloth conforming to the requirements of grade No 1 of

BS 871:1981

NOTE At present there is no European Standard or International standard which covers the type and

grade of the emery cloth used with the pendulum apparatus Accordingly, it has been agreed to refer to British Standard 871.

Dimensions in millimetres

Key

a Centre of action at 475 mm radius

d Distance of point of impact from centre line of apparatus

Ei Tangent angle of impact

h Drop height = 150 mm for impact tests and 815 mm for abrasion tests

L Length of pendulum

Pn Release catch position

= Test specimen

> Base plate

? Pendulum = 54 mm diameter steel bar

@ Adjustable height pivot point

A Spring loaded tip (spring rate = 0,5 mm/kg)

Figure 1 — Steel pendulum impact/abrasion test apparatus

Dimensions in millimetres

Key

a Main disc

b Contact tip

c Ground bevel

d Fixing screw hole

e Locating pin hole

Figure 2 — Tip for use in impact tests

5.3 Accelerated corrosion test apparatus

5.3.1 Glass test cells as shown in Figure 3.

5.3.2 An a.c resistance bridge capable of measuring resistances in the range

10 9 to1 000 M9 to an accuracy of 0,1 % at a frequency of 1 600 Hz ± 20 Hz and a voltage of

3 V ± 0,5 V It is essential to use alternating current for this test

5.3.3 Holiday detector, used for detecting discontinuities in the protective coating.

Key

a Alkaline electrolyte

b Glass test cell

c Platinum electrode

d Epoxy resin sealing fillet

e Resistance bridge

f Coating layer

g Galvanizing layer

h Steel substrate

Figure 3 — Accelerated corrosion test apparatus

6 Determination of impact resistance

6.1 Procedure

Test each of the specimens as follows

a) Place the specimen below the pendulum with its edges parallel to the line of swing of

the pendulum

b) Set the pendulum with the impact resistance tip to the position shown in Figure 1 and

release it from a height of 150 mm

c) After impact, remove the specimen and examine its surface

After each test, check the pendulum tip for wear and/or damage Regrind or renew as

necessary

6.2 Assessment of results

Assess and classify the impact resistance category using Table 1 and the diagram in Figure 4

as given below

a) The impact resistance category of all six specimens is 1 or less

b) The impact resistance category of not less than five specimens is 1 or less, but the impact resistance category of the sixth specimen is greater than 1 but less than or equal to 2 In this case tests on two further specimens have an impact resistance category of 1 or less

c) As b) above, but if either of the two further specimens has an impact resistance category greater than 1

d) In all other cases, or if the impact resistance category of any specimen is greater than 2

d

c

b 0

1

2

3

Key

a Point of impact

b Centre of test arc

c Coated area of specimen

d Exposed galvanized area

Figure 4 — Assessment of impact test results

Table 1 — Classification of impact test results Resistance

category

Description (See also Figure 4)

0 Surface marring at area of initial impact; no galvanized surface exposed;

coating marked but not cut through along areas of swing

1 Coating gouged at area of initial impact; galvanized surface exposed but no

flaking; coating marked but not cut through along areas of swing

2 Coating gouged at areas of initial and first subsidiary impact and also possibly

at additional high spots; galvanized surface exposed but no flaking at edges; coating marked but not cut through along other areas of swing

3 Coating gouged at areas of initial and subsidiary impact; scraping; not more

than 25 % of test area having exposed galvanizing; slight flaking at edges; coating marked along areas of swing

7 Determination of abrasion resistance

7.1 Procedure

Test each of the specimens as follows

a) Place the specimen below the pendulum with its edges parallel to the line of swing of

the pendulum

b) Set the pendulum with the abrasion resistance tip to the position shown in Figure 1

and release it from a height of 850 mm

c) After impact, remove the specimen and examine its surface

After each test, check the pendulum tip for wear and/or damage Regrind or renew as

necessary

7.2 Assessment of results

Assess and classify the results of the abrasion test as follows

a) The protective coating is intact, with no part of the zinc coating exposed

b) The protective coating on five specimens is intact, but the coating on the sixth specimen is exposed, and tests on two further test specimens retain their protective coatings intact c) As b) above, but if either of the two further specimens has any part of the zinc coating exposed

d) In all other cases

8 Accelerated corrosion test

8.1 Preparation of steel test panels

Apply a type of protective coating that has passed the impact and abrasion tests described in

7.1 and 8.1 to the steel test panels, using the same method and pre-treatment as that to be

used to coat the product during manufacture

Inspect the panels to determine the quality of the surface and any visible defects, such as

voids, cracks, runs or sags

Check for discontinuities in the protective coating, using the holiday detector

If defects are found in any test panel, reject the panel and prepare a new panel

8.2 Preparation of alkaline solution

Add 300 g of Portland Cement, conforming to EN 197-1 type CEM I, to one litre of deionized

water Stir for not less than 1/2 h Allow to settle Ensure that the pH of the clear liquid is

12,6 ± 0,1, adjusting to this value if necessary Decant off the liquid

8.3 Procedure

Test the panels as follows:

a) Attach the test cells to not less than three prepared test panels using an epoxy resin

adhesive compatible with the paint coating to seal the outer edges of the cell

b) Allow the adhesive not less than 24 h to set

c) Fill the cells with alkaline solution (see 8.1.2) to a height of 30 mm.

d) Position a platinum electrode in the solution 25 mm above each test panel

e) Connect a lead from one side of the a.c resistance bridge to the substrate steel of

each panel and the corresponding lead from the other side of the resistance bridge to the appropriate platinum electrode