SIST EN 990:2003

SLOVENSKI STANDARD
01-julij-2003
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SIST EN 990:2001
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Test methods for verification of corrosion protection of reinforcement in autoclaved
aerated concrete and lightweight aggregate concrete with open structure
Prüfverfahren zur Überprüfung des Korrosionsschutzes der Bewehrung in
dampfgehärtetem Porenbeton und in haufwerksporigem Leichtbeton
Méthodes d'essai pour la vérification de la protection contre la corrosion des armatures
dans le béton cellulaire autoclavé et le béton de granulats légers a structure ouverte
Ta slovenski standard je istoveten z: EN 990:2002
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 990
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2002
ICS 91.100.30 Supersedes EN 990:1995
English version
Test methods for verification of corrosion protection of
reinforcement in autoclaved aerated concrete and lightweight
aggregate concrete with open structure
Méthodes d'essai pour la vérification de la protection contre Prüfverfahren zur Überprüfung des Korrosionsschutzes der
la corrosion des armatures dans le béton cellulaire Bewehrung in dampfgehärtetem Porenbeton und in
autoclavé et le béton de granulats légers à structure haufwerksporigem Leichtbeton
ouverte
This European Standard was approved by CEN on 21 July 2002.
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, Malta, Netherlands, Norway, Portugal, 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
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 990:2002 E
worldwide for CEN national Members.

Contents
page
Foreword.3
1 Scope .3
2 Normative references .3
3 Principle.4
4 Apparatus .4
5 Test specimens .4
5.1 General.4
5.2 Sealing of the end faces and conditioning of the test specimens.5
6 Corrosion tests.5
6.1 Short-term test with alternate wetting with sodium chloride solution and drying in air (method
1) .5
6.1.1 Exposure cycles.5
6.1.2 Examination of steel surface and evaluation of results .6
6.2 Short-term test with alternate wetting with water and drying in warm air (method 2) .6
6.2.1 Exposure cycles.6
6.2.2 Examination of the steel surface and evaluation of results .6
6.3 Short-term test with alternating temperature (method 3) .6
6.3.1 Exposure cycles.6
6.3.2 Examination of the steel surface and evaluation of results .6
7 Test report .7
Foreword
This document (EN 990:2002) has been prepared by Technical Committee CEN /TC 177 "Prefabricated reinforced
components of autoclaved aerated concrete or light-weight aggregate concrete with open structure", the secretariat
of which is held by DIN.
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 March 2003, and conflicting national standards shall be withdrawn at the latest by
March 2003.
This document supersedes EN 990:1995.
In order to meet the performance requirements as laid down in the product standards for prefabricated reinforced
components of autoclaved aerated concrete or for prefabricated reinforced components of lightweight aggregate
concrete with open structure a number of standardised test methods are necessary.
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, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard specifies the test methods for verification of the effectiveness of the corrosion protection of
reinforcing steel embedded in components of autoclaved aerated concrete (AAC) according to prEN 12602 or in
components of lightweight aggregate concrete with open structure (LAC) according to prEN 1520.
Tests according to this European Standard are not required for LAC-components if corrosion protection is achieved
by embedding the reinforcing bars completely in a zone of concrete with closed structure according to prEN
1520:2002, 5.8.3.3.
Three different methods of short-term tests (methods 1 to 3) are provided.
The test methods can be used to examine the fundamental suitability of a corrosion protective system in combination
with a defined manufacturing process for the production of reinforced components. They can also be used for current
production control.
NOTE The specification of three different short-term test methods is based on historical reasons and established procedures
rather than on technical needs.
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).
prEN 1520:2002, Prefabricated reinforced components of lightweight aggregate concrete with open structure.
prEN 12602, Prefabricated reinforced components of autoclaved aerated concrete.
3 Principle
Test specimens consisting of autoclaved aerated concrete (AAC) or lightweight aggregate concrete with open
structure (LAC) with embedded reinforcing bars are cut from prefabricated reinforced components or manufactured
separately. The test specimens are exposed to a defined corrosive environment for a specified series of exposure
cycles. Immediately after the end of the corrosive exposure the concrete and the protective coating are removed
from the embedded bars. The steel surface is examined visually for corrosion and the area of the corroded surface
is determined and compared with the limits according to the relevant product standard prEN 1520 or prEN 12602.
4 Apparatus
a) Saw
A saw for cutting test specimens from reinforced components without excessive heating or vibrations.
b) Equipment for short-term test with alternate wetting wit
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