EN 12390-3-2009 en Testing hardened concrete - Part 3 Compressive strength of test specimens (Incorporating corrigendum August 2011)《硬化混凝土试验 第3部分 试件抗压强度》.pdf

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1、BSEN12390-3:2009ICS91.100.30NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBY COPYRIGHTLAWBRITISHSTANDARDTestinghardenedconcretePart3:CompressivestrengthoftestspecimensIncorporatingcorrigendumAugust 2011National forewordThis British Standard is the UK implementation of EN 12390-3:2009, incorporating

2、corrigendum August 2011. It supersedes BS EN 12390-3:2002 which is withdrawn.The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by CEN corrigendum August 2011 is indicated in the text by .The UK participation in its preparation was entrus

3、ted to Technical Committee B/517/1, Concrete production and testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applica

4、tion.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 12390-3:2009This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2009 BSI 2011ISBN 978 0 580 76658 9Amendments/corrigenda issued since publicationDa

5、te Comments30 November 2011 Implementation of CEN corrigendum August 2011EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12390-3February 2009ICS 91.100.30 Supersedes EN 12390-3:2001 English VersionTesting hardened concrete - Part 3: Compressive strength oftest specimensEssais pour bton durci - Par

6、tie 3: Rsistance lacompression des prouvettesPrfung von Festbeton - Teil 3: Druckfestigkeit vonProbekrpernThis European Standard was approved by CEN on 27 December 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanSt

7、andard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, Frenc

8、h, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Cze

9、ch 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 Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN

10、 DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12390-3:2009: EIncorporating corrigendumAugust 20112 Contents PageForeword 31Scop

11、e 52Normative references53Principle 54Apparatus .55Test specimens56Procedure .67Expression of results78Test report 79Precision 10Annex A (normative) Adjustment of test specimens 11Annex B (normative) Procedure for testing specimens with dimensions which are outside thetolerances of the designated si

12、zes of EN 12390-1 16Bibliography . 19BS EN 12390-3:2009 EN 12390-3:2009 (E)3 Foreword This document (EN 12390-3:2009) has been prepared by Technical Committee CEN/TC104 “Concrete andrelated products”, the secretariat of which is held byDIN. This European Standard shall be given the status ofa nation

13、al standard, either by publication of an identical text or byendorsement, at the latest by August 2009, and conflicting national standards shall be withdrawn at the latest by August 2009.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig

14、hts. CEN and/or CENELEC shall not be held responsible for identifying any orall such patent rights. This document supersedes EN 12390-3:2001.It is recognised good practice to include measurement of densitypr ior to the determination of compress ive strength.The methods for adjusting the ends of test

15、 specimens, given in Annex A, have been validated in a laboratoryinter-comparison, part-funded by the EC under the Measurement and Testing Programme; contract MATI-CT-94-0043.This standard is one of a series concerned with testing concrete.The series EN 12390 includes the following parts:EN 12390 Te

16、sting hardened concrete Part 1:Shape, dimensions and other requirements for specimens and moulds; Part 2:Making and curing specimens for strength tests;Part 3:Compressive strength of test specimens; Part 4:Compressive strength - Specification for testing machines; Part 5:Flexural strength of test sp

17、ecimens; Part 6:Tensile splitting strength of test specimens; Part 7:Density of hardened concrete; Part 8:Depth of penetration of water under pressure. The following amendments have been made to the 2001-12 edition of this standard: editorialrevision the compressive strength to be expressed to the n

18、earest 0,1 MPA (N/mm) instead of 0,5 MPa (N/mm) the loading rate has been changed from between 0,2 MPa/s and 1,0 MPa/s to 0,6 0,2 MPa/s the allowable tolerance for specimens which do not meet the tolerance given in EN 12390-1 fordesignated size has been increasedBS EN 12390-3:2009 EN 12390-3:2009 (E

19、)4 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

20、 Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the UnitedKingdom. BS EN 12390-3:2009 EN 12390-3:2009 (E)5 1 ScopeThis European Standard specifies a method fo r the determination of the compressive strength of t

21、estspecimens of hardened concrete.2 NormativereferencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including anyamendments) applie

22、s.EN 197-1, Cement Part 1: Composition, specifications and conformity criteria for common cementsEN 12350-1, Testing fresh concrete Part 1: SamplingEN 12390-1, Testing hardened concrete - Part1: Shape, dimensions and other requirements for specimensand mouldsEN 12390-2, Testing hardened concrete Par

23、t2: Making and curing specimens for strength testsEN 12390-4, Testing hardened concrete Part4: Compressive strength Specification for testing machinesEN 12504-1, Testing concrete in structures Part1: Cored specimens Taki ng, examining and testing incompressionISO 3310-1, Test sieves; technical requi

24、rements and testing Part 1: Test sieves of metal wire cloth3 PrincipleSpecimens are loaded to failure in a compression testing machine conforming to EN 12390-4. The maximumload sustained by the specimen is recorded and the compressive strength of the concrete is calculated.4 ApparatusCompression tes

25、ting machine, conforming to EN 12390-4.5 Test specimens5.1 RequirementThe test specimen shall be a cube, cylinder or core meeting the requirements of EN 12350-1,EN 12390-1, EN 12390-2, or EN 12504-1. If the dimension of the test specimen does not conform to the tolerances for designatedsize in EN 12

26、390-1, it can be tested in accordance with the procedure given inAnnex B.NOTE Damaged specimens or specimens which are badly honeycombed should not be tested.BS EN 12390-3:2009 EN 12390-3:2009 (E)6 5.2Adjustment oftest specimensWhere the dimensions or shapes of test specimens do not conform to the r

27、equirements given inEN 12390-1 because they exceed the re spective tolerances, they shall be rejected, adjusted ortested inaccordance with AnnexB.One of the methods given in Annex A shall be used toadjust specimens. 6 Procedure6.1Specimen preparationand positioning Wipe all testing machine bearing s

28、urfaces clean and remove anyloose grit or other extraneous material fromthe surfaces of the specimen thatwill be in contact with the platens.Do not use packing, other than auxiliaryplatens or spacing blocks (see EN 12390-4) between the specimen and the platens of the testing machine.Wipe the excessm

29、oisture from the surface of the specimen before placing in the testing machine.Position the cube specimens so that the load is applied perpendicularlyto the direction of casting.Centre the specimen with respect to the lower platen to an accuracy of 1 % of the designated size of cubic, ordesignated d

30、iameter of cylindrical specimens. If auxiliaryplatens are used, align them with the top and bottom face of the specimen.With two-column testing machines, cubic specimens should be placed with the trowelled surface facing a column.6.2 Loading Select a constant rate of loading within the range 0,6 0,2

31、 MPa/s (N/mms). After the application of the initial load, which does not exceed approximately 30% of the failure load, applythe load to the specimen without shock and increase continuously at the selected constant rate 10 %, until no greater load can be sustained.When using manually controlled test

32、ing machines, correct any tendency for the selected rate of loading todecrease, as specimen failure is approached byappropriate adjustment of the controls.Record the maximum load indicated in kN. NOTE Further guidance on loading rates for high and low strength concrete e.g. above 80 MPa and below 20

33、 MPa cube strengths, may be given in national Annex NA6.3Assessment oftype of failureExamples of the failure of specimen showing that the tests have proceeded satisfactorily are given in Figure 1 for cubes and in Figure 3 for cylinders.Examples for unsatisfactory failure of specimens are shown in Fi

34、gure 2 for cubes and in Figure 4 for cylinders.If failureis unsatisfactory this shall be recorded with reference to the pattern letter according to Figure 2 or 4closest to that observed.NOTE Unsatisfactoryfailures can be caused by: BS EN 12390-3:2009 EN 12390-3:2009 (E)7 insufficient attention to te

35、sting procedures, especially positioning of the specimen;a fault with the testing machine. For cylindrical specimens, failure of the capping before the concrete is an unsatisfactory failure.7 Expression of resultsThe compressive strength is given bythe equation: ccFfA=wheref c is the compressive str

36、ength, in MPa (N/mm); F is the maximum load at failure, in N;A c is the cross-sectional area of the specimen onwhich the compressive force acts, calculated fromthe designated size of the specimen (see EN 12390-1) or from measurements on the specimen if tested according to Annex B, in mm2 . The compr

37、essive strength shall be expressed to the nearest 0,1 MPa (N/mm).8 Test reportThe report shall include:a) identification of the test specimen;b) designated dimensions of the specimen or if tested inaccordance with Annex B,actual dimensions;c) details of adjustment bygrinding/capping (if appropriate)

38、;d) date oftest;e) maximum load at failure, inkN;f) compressive strength of specimen, to the nearest 0,1 MPa (N/mm);g) unsatisfactory failure (if appropriate) and if unsatisfactory the closest type;h) anydeviations from the standard method of testing;i) a declaration from the person technicallyrespo

39、nsible for the test that it was carried out in accordance withthis document, except as detailed in item h). The report mayinclude:j) mass of the specimen; k) apparent densityof specimen, to the nearest 10 kg/m3 ; l) condition of the specimen on receipt;BS EN 12390-3:2009 EN 12390-3:2009 (E)8 m) curi

40、ng conditions since receipt;n) time of test (if appropriate);o) age of specimen at time of test (if known).ExplosivefailureNOTE All four exposed faces are cracked approximately equally, generally with little damage to faces in contact withthe platens.Figure 1 Satisfactory failures of cube specimensN

41、OTE T = tensile crackFigure 2 Some unsatisfactory failures of cube specimensBS EN 12390-3:2009 EN 12390-3:2009 (E)9 Figure 3 Satisfactory failure of cylinder specimenFigure 4 Some unsatisfactory failures of cylinder specimensBS EN 12390-3:2009 EN 12390-3:2009 (E)10 9 PrecisionTable 1 Precision data

42、for measurements of the compressive strength of hardened concrete, expressed as percentages of the mean of the two cube strengths whose difference is to be comparedwith repeatability (r ) or reproducibility ( R ).Test method Repeatability conditions Reproducibility conditionss r %r%s R%R %100 mm cub

43、es150 mm cubes3,23,29,09,05,44,715,113,2NOTE1The precision data were determined as part of an experiment carried out in 1987 in which precisiondata were obtained for several of the tests described in BS 1881. The experiment involved16 operators. The concretes were made using an ordinary Portland cem

44、ent, Thames Valley sand, and ThamesValley 10 mm and 20 mm coarse aggregates.NOTE2The difference between two test results from the same sample by one operator using the sameapparatus within the shortest feasible time interval will exceed the repeatability value r on average not more thanonce in 20 ca

45、ses in the normal and correct operation of the method.NOTE3Test results on the same sample obtained within the shortest feasible time interval by two operatorseach using their own apparatus will differ by the reproducibility value R on average not more than once in 20cases in the normal and correct

46、operation of the method. NOTE4For further information on precision, and for definitions of the statistical terms used in connectionwith precision, see ISO 5725-1.BS EN 12390-3:2009 EN 12390-3:2009 (E)Table 2 Precision data for measurements of the compressive strength of hardened concrete, expressed

47、as percentages of the mean of the three cylinder strengths whose differences are to be compared with repeatability (r) or reproducibility (R) Test method Repeatability conditions Reproducibility conditions srr sRR % % % % cylinder (160 mm diameter, 320 mm height) 2,9 8,0 4,1 11,7 NOTE 1 The precisio

48、n data were determined in France as part of a Round Robin Test carried out in 1992. They are based on the results obtained by 89 laboratories which had participated in the test. NOTE 2 The concretes were made using CPA55 cement (CEMI), Seine river sand and 20 mm aggregate. The average value was 38,8

49、7 MPa. NOTE 3 The precision data only includes the procedure of testing for compressive strength. 11 Annex A(normative) Adjustment of test specimensA.1 GeneralWhen it is necessary to reduce the size of a specimen, it shall be ground or sawn.The intended load-bearing surfaces shall be prepared bygrinding or by capping. (See Table A.1).Table A.1 Restrictions on methods of adjustmentMethod Restriction based on (anticipated) measured strengthGrinding unlimitedCalcium aluminate cement mortar up to approximately