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1、BRITISH STANDARD BS EN 12390-3:2002 Testing hardened concrete Part 3: Compressive strength of test specimens The European Standard EN 12390-3:2001 has the status of a British Standard ICS 91.100.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed copy:PONTYPRIDD COLLEG
2、E, 05/06/2007, Uncontrolled Copy, BSI BS EN 12390-3:2002 This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 25 February 2002 BS
3、I 25 February 2002 ISBN 0 580 39128 0 National foreword This British Standard is the official English language version of EN 12390-3:2001. It will supersede BS 1881-116:1983, which will be withdrawn in 2003 when the full package of the Concrete Standards is available. The UK participation in its pre
4、paration was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/1, Concrete production and testing, 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
5、 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
6、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
7、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
8、, pages 2 to 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed copy:PONTYPRIDD COLLEGE, 05/06/2007, Uncontrolled Copy, BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE
9、 NORM EN 12390-3 December 2001 ICS 91.100.30 English version Testing hardened concrete - Part 3: Compressive strength of test specimens Essais pour bton durci - Partie 3: Rsistance la compression des prouvettes Prfung von Festbeton - Teil 3: Druckfestigkeit von Probekrpern This European Standard was
10、 approved by CEN on 2 September 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 n
11、ational 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 n
12、otified 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
13、and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 123
14、90-3:2001 E Licensed copy:PONTYPRIDD COLLEGE, 05/06/2007, Uncontrolled Copy, BSI EN 12390-3:2001 (E) 2 Contents page 1Scope 4 2Normative references 4 3Principle4 4Apparatus .4 5Test specimens4 6Procedure .5 7Expression of results 6 8Test report 6 9Precision.9 Annex A (normative) Adjustment of test s
15、pecimens.10 Annex B (normative) Procedure for testing specimens with dimensions which are outside the tolerances of the designated sizes of EN 12390-114 Figures Figure 1 Satisfactory failures of cube specimens 7 Figure 2 Some unsatisfactory failures of cube specimens .7 Figure 3 Satisfactory failure
16、 of cylinder specimen.8 Figure 4 Some unsatisfactory failures of cylinder specimens8 Figure A.1 Capping: Sandbox method.13 Figure A.2 Detail of sandbox.13 Figure A.3 Positioning frame 13 Figure B.1 Dotted lines showing measuring positions for the loading faces of cubes15 Figure B.2 Dotted lines show
17、ing measuring positions for the non-loaded faces of cubes.15 Figure B.3 Dotted lines showing the measuring positions for the ends of a cylinder15 Figure B.4 Dotted lines showing the measuring positions for the height of a cylinder.15 Tables Table 1 Precision data for measurements of the compressive
18、strength of hardened concrete, expressed as percentages of the mean of the two cube strengths whose difference is to be compared with repeatability (r) or reproducibility (R)9 Table 2 Precision data for measurements of the compressive strength of hardened concrete, expressed as percentages of the me
19、an of the three cylinder strengths whose differences are to be compared with repeatability (r) or reproducibility (R). .9 Table A.1 Restrictions on methods of adjustment .10 Licensed copy:PONTYPRIDD COLLEGE, 05/06/2007, Uncontrolled Copy, BSI ? EN 12390-3:2001 (E) 3 Foreword This European Standard h
20、as been prepared by Technical Committee CEN /TC 104, “Concrete“, 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 June 2002, and conflicting national standa
21、rds shall be withdrawn at the latest by December 2003. 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, Icelan
22、d, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This standard is based on the draft International Standard ISO 4012 Concrete Determination of compressive strength of test specimens. It is recognised good practice to include measurement
23、 of density prior to the determination of compressive strength. The methods for adjusting the ends of test specimens, given in annex A, have been validated in a recent laboratory inter-comparison, part-funded by the EC under the Measurement and Testing Programme, contract MATI-CT-94- 0043. A draft f
24、or this standard was published in 1996 for CEN enquiry as prEN 12394. It was one of a series of individually numbered test methods for fresh or hardened concrete. For convenience it has now been decided to combine these separate draft standards into three new standards with separate parts for each m
25、ethod, as follows: ? Testing fresh concrete (EN 12350) ? Testing hardened concrete (EN 12390) ? Testing concrete in structures (EN 12504) The series EN 12390 includes the following parts where the brackets give the numbers under which particular test methods were published for CEN enquiry: EN 12390
26、Testing hardened concrete Part 1:Shape, dimensions and other requirements for specimens and moulds (former prEN 12356:1996) Part 2:Making and curing specimens for strength tests (former prEN 12379:1996) Part 3:Compressive strength of test specimens (former prEN 12394:1996) Part 4:Compressive strengt
27、h Specification for testing machines (former prEN 12390:1996) Part 5:Flexural strength of test specimens (former prEN 12359:1996) Part 6:Tensile splitting strength of test specimens (former prEN 12362:1996) Part 7:Density of hardened concrete (former prEN 12363:1996) Part 8:Depth of penetration of w
28、ater under pressure (former prEN 12364:1996) Licensed copy:PONTYPRIDD COLLEGE, 05/06/2007, Uncontrolled Copy, BSI ? EN 12390-3:2001 (E) 4 The annexes A and B are normative. 1 Scope This standard specifies a method for the determination of the compressive strength of test specimens of hardened concre
29、te. 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 re
30、visions 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 cri
31、teria for common cements. EN 12350-1, Testing fresh concrete Part 1: Sampling. EN 12390-1, Testing hardened concrete Part 1: Shape, dimensions and other requirements for specimens and moulds. EN 12390-2, Testing hardened concrete Part 2: Making and curing specimens for strength tests. EN 12390-4, Te
32、sting hardened concrete Part 4: Compressive strength Specification for testing machines. EN 12504-1, Testing concrete in structures Part 1: Cored specimens Taking, examining and testing in compression. ISO 3310-1, Test sieves; technical requirements and testing Part 1: Test sieves of metal wire clot
33、h. ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions. Series BS 1881, Testing concrete 3 Principle Specimens are loaded to failure in a compression testing machine conforming to EN 12390-4. The maximum load sustained by the sp
34、ecimen is recorded and the compressive strength of the concrete is calculated. 4 Apparatus Compression testing machine, conforming to EN 12390-4. 5 Test specimens 5.1 Requirement The test specimen shall be a cube, cylinder or core meeting the requirements of EN 12350-1, EN 12390-1, EN 12390-2, or EN
35、 12504-1. If the dimension of the test specimen does not conform to the tolerances for designated size in EN 12390-1, it can be tested in accordance with the procedure given in annex B. NOTEDamaged specimens or specimens which are badly honeycombed should not be tested. Licensed copy:PONTYPRIDD COLL
36、EGE, 05/06/2007, Uncontrolled Copy, BSI ? EN 12390-3:2001 (E) 5 5.2 Adjustment of test specimens Where the dimensions or shapes of test specimens do not conform to the requirements given in EN 12390-1 because they exceed the respective tolerances, they shall be rejected, adjusted or tested in accord
37、ance with annex B. One of the methods given in annex A shall be used to adjust specimens. 6 Procedure 6.1 Specimen preparation and positioning Wipe the excess moisture from the surface of the specimen before placing in the testing machine. Wipe all testing machine bearing surfaces clean and remove a
38、ny loose grit or other extraneous material from the surfaces of the specimen that will be in contact with the platens. Do not use packing, other than auxiliary platens or spacing blocks (see EN 12390-4) between the specimen and the platens of the testing machine. Position the cube specimens that the
39、 load is applied perpendicularly to the direction of casting. Centre the specimen with respect to the lower platen to an accuracy of 1 % of the designated size of cubic, or designated diameter of cylindrical specimens. If auxiliary platens are used, align them with the top and bottom face of the spe
40、cimen. 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 0,2 MPa/s (N/mm2? s) to 1,0 MPa/s (N/mm2? s). Apply the load to the specimen without shock and increase continuously, a
41、t the selected constant rate 10 %, until no greater load can be sustained. When using manually controlled testing machines, correct any tendency for the selected rate of loading to decrease, as specimen failure is approached by appropriate adjustment of the controls. Record the maximum load indicate
42、d. 6.3 Assessment of type of failure Examples 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 figure 2 for cubes and in figure 4 for cylinders.
43、 If failure is unsatisfactory this shall be recorded with reference to the pattern letter according to figure 2 or 4 closest to that observed. NOTEUnsatisfactory failures can be caused by: ? insufficient attention to testing procedures, especially positioning of the specimen; ? a fault with the test
44、ing machine. For cylindrical specimens, failure of the capping before the concrete is an unsatisfactory failure. Licensed copy:PONTYPRIDD COLLEGE, 05/06/2007, Uncontrolled Copy, BSI ? EN 12390-3:2001 (E) 6 7 Expression of results The compressive strength is given by the equation: c c A F f? where fc
45、is the compressive strength, in megapascals (newtons per square millimetre); Fis the maximum load at failure, in newtons; Acis the cross-sectional area of the specimen on which the compressive force acts, calculated from the designated size of the specimen (see EN 12390-1) or from measurements on th
46、e specimen according to annex B in mm2. The compressive strength shall be expressed to the nearest 0,5 MPa (N/mm2). 8 Test report The report shall include: a) identification of the test specimen; b) designated dimensions of the specimen or if oversize and tested in accordance with Annex B, actual di
47、mensions; c) surface condition of the specimen at the time of test; d) details of adjustment by grinding/capping (if appropriate); e) date of test; f) maximum load at failure, in kilonewtons; g) compressive strength of specimen in megapascals (to the nearest 0,5 MPa) or newtons per square millimetre
48、 (to the nearest 0,5 N/mm2); h) unsatisfactory failure (if appropriate) and if unsatisfactory the closest type; i) any deviations from the standard method of testing; j) a declaration from the person technically responsible for the test that the testing was carried out in accordance with this standa
49、rd, except as detailed in item i). The report may include: k) mass of the specimen; l) apparent density of specimen, to the nearest 10 kg/m3; m) condition of the specimen on receipt; n) curing conditions since receipt; o) time of test (if appropriate); p) age of specimen at time of test. Licensed copy:PONTYPRIDD COLLEGE, 05/06/2007, Uncontrolled Copy, BSI ? EN 12390-3:2001 (E) 7 Explosive failure NOTEAll four exposed fa