DIN EN 12390-2 Berichtigung 1-2012 Testing hardened concrete - Part 2 Making and curing specimens for strength tests German version EN 12390-2 2009 Corrigendum to DIN EN 12390-2 20.pdf

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1、February 2012 Translation by DIN-Sprachendienst.English price group 99No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I

2、CS 91.100.30!$p8“1907721www.din.deDThis corrigendum should be filed together withthe translation of the standard to which it refersand a corresponding note made on thetranslation.DIN EN 12390-2 Corrigendum 1Testing hardened concrete Part 2: Making and curing specimens for strength tests;English vers

3、ion EN 12390-2:2009,Corrigendum to DIN EN 12390-2:2009-08,English translation of DIN EN 12390-2 Berichtigung 1:2012-02Prfung von Festbeton Teil 2: Herstellung und Lagerung von Probekrpern fr Festigkeitsprfungen;Englische Fassung EN 12390-2:2009,Berichtigung zu DIN EN 12390-2:2009-08,Englische berset

4、zung von DIN EN 12390-2 Berichtigung 1:2012-02Essai pour bton durci Partie 2: Confection et conservation des prouvettes pour essais de rsistance;Version anglaise EN 12390-2:2009,Corrigendum DIN EN 12390-2:2009-08,Traduction anglaise de DIN EN 12390-2 Berichtigung 1:2012-02www.beuth.deDocument compri

5、ses 2 pagesIn case of doubt, the German-language original shall be considered authoritative.07.12 DIN EN 12390-2 Cor. 1:2012-02 2 In the English version of DIN EN 12390-2:2009-08 the following correction is to be made: Include the following informative national Annex NA: National Annex NA (informati

6、ve) Curing conditions for test specimens for compressive strength testing and determining the elastic modulus NA.1 General DIN EN 12390-2:2009-08 specifies methods for making and curing test specimens for strength tests. Curing conditions deviating from those specified in this European Standard are

7、permitted. Such deviating conditions are commonly used in Germany and are expressly required in the relevant material standards on concrete. Therefore, the curing conditions commonly used in Germany for strength testing and for determining the elastic modulus are described in this National Annex. Th

8、is Annex describes the curing conditions for concrete test specimens in accordance with DIN EN 12390-2:2009-08, 5.5.3 with which the compressive strength dryc,f or the elastic modulus dryc,E are determined. NA.2 Curing conditions After they are made, leave the test specimens in the moulds for (24 2)

9、 h in a closed room with an air temperature of 15 C to 22 C (the aim should be to achieve a temperature range of (20 2) C), protected against draughts and dehydration, e.g. by covering them with PE film. During the setting time the specimens are to be protected against shock and vibration, e.g. duri

10、ng transport. After (24 2) h remove the specimens from the moulds and cure them for 6 days on a grating in a bath of tap water at a temperature of (20 2) C. As an alternative, specimens can also be cured for 6 days on a slatted frame in a humidity chamber at a temperature of (20 2) C and 95 % relati

11、ve humidity. When the specimens have reached an age of 7 days after they have been made, take them out of the water bath or humidity chamber and cure them on a slatted frame in a closed room at a temperature of 15 C to 22 C (the aim should be to achieve a temperature range of (20 2) C) and a relative humidity of (65 5) %). Specimens are to be protected from direct draughts.