1、June 2010 Translation by DIN-Sprachendienst.English price group 12No 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).ICS 9
2、1.100.30!$i/O“1701244www.din.deDDIN EN 15304Determination of the freeze-thaw resistance of autoclaved aeratedconcreteEnglish translation of DIN EN 15304:2010-06Bestimmung des Frost-Tau-Widerstandes von dampfgehrtetem PorenbetonEnglische bersetzung von DIN EN 15304:2010-06Dtermination de la rsistance
3、 au gel/dgel du bton cellulaire autoclavTraduction anglaise de DIN EN 15304:2010-06SupersedesDIN EN 15304:2007-08www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2106.10 DIN EN 15304:2010-06 A comma is used as the decimal marker. Na
4、tional foreword This standard has been prepared by Technical Committee CEN/TC 177 “Prefabricated reinforced components of autoclaved aerated concrete or lightweight aggregate concrete with open structure” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the No
5、rmenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Working Committee NA 005-07-09 AA Porenbeton und haufwerksporiger Leichtbeton. Amendments This standard differs from DIN EN 15304:2007-08 as follows: a) Clause 3 “Definitions, symbols and abbreviations” has been added. b) N
6、ormative references have been updated. c) Tolerances have been added to improve the ease of application. d) The calculation of the moisture content has been expanded. e) The requirements for the test report have been expanded. f) The determination of the mass loss, the calculation of the dry density
7、 and the calculation of the moisture content have been clarified. Previous editions DIN EN 15304: 2007-08 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15304 March 2010 ICS 91.100.30 Supersedes EN 15304:2007English Version Determination of the freeze-thaw resistance of autoclaved aerated co
8、ncrete Dtermination de la rsistance au gel/dgel du bton cellulaire autoclav Bestimmung des Frost-Tau-Widerstandes von dampfgehrtetem Porenbeton This European Standard was approved by CEN on 23 January 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
9、 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 CEN Management Centre or to any CEN member. This European Standard exists i
10、n 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 bodie
11、s of Austria, Belgium, Bulgaria, Croatia, 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 King
12、dom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15304:2010: EEN 153
13、04:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Definitions, symbols and abbreviations 43.1 Superscripts and subscripts 43.2 Symbols 43.2.1 Symbols used in the main body of the standard 43.2.2 Symbols specific to Annex A .54 Principle 65 Apparatus .66 Test specimens 66.1 Sam
14、ple 66.2 Shape and size of the test specimens .76.3 Number of test specimens 76.4 Preparation of test specimens .76.5 Measurement of test specimens and determination of their volume .86.6 Conditioning of test specimens .87 Testing procedure87.1 Freeze-thaw test .87.2 Determination of actual moisture
15、 content and dry density of AAC .98 Test results .98.1 Calculation of dry density .98.2 Calculation of moisture content 108.3 Calculation of mass loss 109 Test report . 11Annex A (informative) Determination of the loss in compressive strength in addition to the loss in mass . 13A.1 General . 13A.2 T
16、est specimens . 13A.2.1 Number of test specimens . 13A.2.2 Preparation of test specimens 13A.3 Testing procedure. 13A.3.1 Freeze-thaw tests 13A.3.2 Conditioning of the test specimens for compression test after the freeze-thaw cycles. 13A.3.3 Compression test 14A.4 Test results 14A.4.1 Calculation of
17、 loss of compressive strength of main test specimens 14A.4.2 Determination of mass loss . 15A.4.3 Calculation of dry density 16A.4.4 Calculation of moisture content 16Annex B (informative) Flow chart of freeze-thaw test 17Bibliography . 19Figures Figure 1 Cutting scheme .8Figure B.1 Cutting scheme .
18、 17 DIN EN 15304:2010-06 EN 15304:2010 (E) 3 Foreword This document (EN 15304:2010) has been prepared by Technical Committee CEN/TC 177 “Prefabricated reinforced components of autoclaved aerated concrete or lightweight aggregate concrete with open structure”, the secretariat of which is held by DIN.
19、 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 September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. Attention is drawn to the possibility that s
20、ome of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 15304:2007. The main changes with respect to EN 15304:2007 are listed below: a) the clause “Definition
21、s, symbols and abbreviations“ has been added; b) the normative references have been updated; c) tolerances have been added to improve the ease of application; d) the calculation of moisture content has been expanded; e) the requirements for the test report have been expanded; f) the determination of
22、 mass loss, calculation of dry density and calculation of moisture content have been clarified. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cypru
23、s, 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 the United Kingdom. DIN EN 15304:2010-06 EN 15304:2010 (E)
24、 4 1 Scope This document specifies a method of determining the freeze-thaw resistance of autoclaved aerated concrete (AAC) manufactured according to EN 12602 or EN 771-4. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer
25、ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 678, Determination of the dry density of autoclaved aerated concrete EN 1353, Determination of moisture content of autoclaved aerated concrete EN 12390-
26、4, Testing hardened concrete Part 4: Compressive strength Specification for testing machines 3 Definitions, symbols and abbreviations 3.1 Superscripts and subscripts m main test specimen (superscript) r reference test specimen (superscript) i identification number of the test specimen (subscript) 3.
27、2 Symbols 3.2.1 Symbols used in the main body of the standard ri,0mmeasured initial moist mass of the reference test specimen i immediately after removal from polythene bag (or similar) rni,m measured moist mass of the reference test specimen i representing the state immediately after completion of
28、n freeze-thaw cycles (should be equal to ri,0m ) rnid,mmeasured oven-dry mass of the reference test specimen i immediately after completion of n freeze-thaw cycles of the main test specimens mi,0m measured initial moist mass of the main test specimen i immediately after removal from polythene bag (o
29、r similar) prior to commencing the freeze-thaw cycles mni,mmoist mass of the main test specimen i immediately after completion of n freeze-thaw cycles mid,0m equivalent oven-dry mass of the main test specimen i immediately after removal from the polythene bag (or similar) mnid,m measured oven-dry ma
30、ss of the main test specimen i immediately after completion of n freeze-thaw cycles DIN EN 15304:2010-06 EN 15304:2010 (E) 5 ri,0 moisture content of the reference test specimen i immediately after removal from polythene bag (or similar) mi,0 moisture content of the main test specimen i immediately
31、after removal from polythene bag or similar (assumed to be equal tori,0 ) mni, moisture content of the main test specimen i immediately after completion of n freeze-thaw cycles (at the end of the freeze-thaw test) miLloss in oven-dry mass of the main test specimen i after completion of n freeze-thaw
32、 cycles 3.2.2 Symbols specific to Annex A rfai,m measured moist mass of the fragments of the saturated (see A.3.2.2) reference test specimen i immediately after the compression test rfdi,m measured oven-dry mass of the fragments of the saturated (see A.3.2.2) reference test specimen i tested on comp
33、ression mn2i,m measured moist mass of the saturated (see A.3.2.2) main test specimen i after finalisation of the n freeze-thaw cycles and after water immersion, immediately before testing of compressive strength (if grinding is needed, before that) mfai,m measured moist mass of the fragments of the
34、saturated (see A.3.2.2) main test specimen i immediately after the compression test mfdi,m measured oven-dry mass of the fragments of the saturated (see A.3.2.2) main test specimen i tested on compression rnai, calculated moisture content of the saturated (see A.3.2.2) reference test specimen i imme
35、diately after compression test (assumed to be equal to the moisture content directly before compression test) mnai, calculated moisture content of the saturated (see A.3.2.2) main test specimen i after finalisation of the n freeze-thaw cycles, immediately after compression test mnci,f individual val
36、ue of the compressive strength of the main test specimen i after the specified number of cycles (n) and subsequent conditioning according to A.3.2.1 or A.3.2.2, in megapascals rnci,f individual value of the compressive strength of the appropriate reference test specimen i , conditioned in the same m
37、anner (according to A.3.2.1 or A.3.2.2) and tested at the same time as the corresponding main test specimen, in megapascals relci,f relative decrease of compressive strength of the main test specimen i as a percentage of the initial compressive strength DIN EN 15304:2010-06 EN 15304:2010 (E) 6 4 Pri
38、nciple Cubic test specimens (two equal groups consisting of main test specimens and reference test specimens) are cut from products sampled from normal production, saturated in water for (48 1) h, removed and then placed in polythene bags or similar protecting against drying for (24 1) h to equilibr
39、ate. The main test specimens are subjected to repeated freezing at (15 2) C for at least 8 h followed by thawing in an environment of 95 % relative humidity and (20 2) C for at least 8 h. The reference test specimens are stored in a climatic chamber at (20 5) C in conditions that prevent drying of t
40、he AAC during storage. After the specified number of freeze-thaw cycles (not less than 15), the mass loss of the main test specimens is determined. The dry density and moisture content is also determined on the reference test specimens. If the loss in compressive strength is also required to be dete
41、rmined, then Annex A should be followed. NOTE Depending on the conditions at the place of use, the number of freeze-thaw cycles and requirements for limit values of loss in mass and compressive strength can be specified by national provisions. 5 Apparatus 5.1 Saw with rotating carborundum or diamond
42、 blade or similar equipment for cutting test specimens. 5.2 Balance, capable of determining the mass of the test specimens to an accuracy of 0,1 %. 5.3 Callipers, capable of reading the dimensions of the test specimens to an accuracy of 0,1 mm. 5.4 Container, to store the test specimens under water
43、at (20 2) C. 5.5 Feeler gauge, capable of measuring 0,1 mm, (if required) 0,5 mm and 1 mm. 5.6 Room or cabinet for thawing of the main test specimens able to maintain a relative humidity 95 % at (20 2) C. 5.7 Storage room for reference test specimens able to maintain a relative humidity 95 % at (20
44、5) C. 5.8 Freezing chamber with internal air circulation capable of maintaining a uniformly distributed temperature of (15 2) C. 5.9 Ventilated drying oven, capable of maintaining a temperature of (105 5) C. 5.10 Straight edge, at least 200 mm long, and a square. 5.11 Compression testing machine, pr
45、eferably hydraulically operated, which meets the requirements of EN 12390-4. NOTE The room according to 5.6 needs not necessarily be humidity-controlled. Alternatively it is possible to substitute moisture losses by 2 h prior to the end of the thawing period placing the main test specimens in underw
46、ater storage for 1 h at (20 5) C and subsequently leaving the test specimens to equilibrate in air for 1 h at (20 5) C before freezing. This procedure is especially appropriate in combination with automatic systems. It should be ensured that the starting moisture content is not exceeded. 6 Test spec
47、imens 6.1 Sample The sample for the preparation of the test specimens shall be taken in such a manner that it is representative of the product to be investigated, and the test specimens shall be cut from the sample as illustrated in Figure 1. DIN EN 15304:2010-06 EN 15304:2010 (E) 7 6.2 Shape and si
48、ze of the test specimens The test specimens shall be cubes with an edge length of (100 2) mm. 6.3 Number of test specimens A test set shall consist of 12 test specimens: 6 main test specimens and 6 reference test specimens. The main test specimens are exposed to a specified number of freeze-thaw cyc
49、les in accordance with 7.1, and their loss in mass (see 8.3) and, if required, their loss in compressive strength due to this exposure is determined (see A.3 and A.4). The reference test specimens are used for determination of the moisture content of the AAC prior to the freeze-thaw test and of the dry density and, if required, for the determination of
