1、July 2009DEUTSCHE NORM English price group 11No part of this standard 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 91.100.30!$Xl“1537390www.
2、din.deDDIN EN 12390-3Testing hardened concrete Part 3: Compressive strength of test specimensEnglish version of DIN EN 12390-3:2009-07Prfung von Festbeton Teil 3: Druckfestigkeit von ProbekrpernEnglische Fassung DIN EN 12390-3:2009-07SupersedesDIN EN 12390-3:2002-04www.beuth.deDocument comprises 21
3、pagesDIN EN 12390-3:2009-07 2 National foreword This standard has been prepared by Technical Committee CEN/TC 104 “Concrete and related products” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Stan
4、dards Committee), Technical Committee NA 005-07-05 AA Prfverfahren fr Beton. Amendments This standard differs from DIN EN 12390-3:2002-04 as follows: a) The standard has been editorially revised. b) The compressive strength is to be expressed to the nearest 0,1 MPa (N/mm2) instead of 0,5 MPa (N/mm2)
5、. c) The loading rate has been changed from between 0,2 MPa/s and 1,0 MPa/s to 0,6 0,2 MPa/s. d) The allowable tolerances for specimens which do not meet the tolerances given in EN 12390-1 for designated sizes has been increased. Previous editions DIN EN 12390-3: 2002-04 EUROPEAN STANDARDNORME EUROP
6、ENNEEUROPISCHE NORMEN 12390-3February 2009ICS 91.100.30 Supersedes EN 12390-3:2001 English VersionTesting hardened concrete - Part 3: Compressive strength oftest specimenscompression des prouvettesPrfung von Festbeton - Teil 3: Druckfestigkeit vonProbekrpernThis European Standard was approved by CEN
7、 on 27 December 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards m
8、ay be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CE
9、N Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
10、 Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form
11、and by any means reservedworldwide for CEN national Members.Ref. No. EN 12390-3:2009: EEssai pour bton durci - Partie 3: Rsistance laEN 12390-3:2009 (E) 2 Contents Page Foreword 3 1 Scope 5 2 Normative references 5 3 Principle 5 4 Apparatus .5 5 Test specimens 5 6 Procedure .6 7 Expression of result
12、s 7 8 Test report 7 9 Precision 10 Annex A (normative) Adjustment of test specimens 11 Annex B (normative) Procedure for testing specimens with dimensions which are outside the tolerances of the designated sizes of EN 12390-1 16 Bibliography . 19 DIN EN 12390-3:2009-07 EN 12390-3:2009 (E) 3 Foreword
13、 This document (EN 12390-3:2009) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, 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
14、 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 rights. CEN and/or CENELEC shall not be held responsible for identifying any or al
15、l such patent rights. This document supersedes EN 12390-3:2001. It is recognised good practice to include measurement 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 laboratory inter-compa
16、rison, 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 Testing hardened concrete Part 1: Shape, dimensions and other requirements
17、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 specimens; Part 6: Tensile splitting strength of test specimens; Part
18、 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: editorial revision 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
19、for specimens which do not meet the tolerance given in EN 12390-1 for designated size has been increased DIN EN 12390-3:2009-07 the compressive strength to be expressed to the nearest 0,1 MPa (N/mm) instead of 0,5 MPa (N/mm) EN 12390-3:2009 (E) 4 According to the CEN/CENELEC Internal Regulations, th
20、e national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No
21、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12390-3:2009-07 EN 12390-3:2009 (E) 5 1 Scope This European Standard specifies a method for the determination of the compressive strength of test specimens of hardened concrete. 2 Normative
22、 references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 197-1, Cement Part 1: Composition,
23、 specifications and conformity criteria 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 f
24、or strength tests EN 12390-4, Testing 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:
25、Test sieves of metal wire cloth 3 Principle Specimens are loaded to failure in a compression testing machine conforming to EN 12390-4. The maximum load sustained by the specimen is recorded and the compressive strength of the concrete is calculated. 4 Apparatus Compression testing machine, conformin
26、g 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 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 t
27、ested in accordance with the procedure given in Annex B. NOTE Damaged specimens or specimens which are badly honeycombed should not be tested. DIN EN 12390-3:2009-07 EN 12390-3:2009 (E) 6 5.2 Adjustment of test specimens Where the dimensions or shapes of test specimens do not conform to the requirem
28、ents given in EN 12390-1 because they exceed the respective tolerances, they shall be rejected, adjusted or tested in accordance 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 all testing machine bearing
29、surfaces clean and remove any 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. Wipe the
30、excess moisture from the surface of the specimen before placing in the testing machine. Position the cube specimens so that the 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
31、designated diameter of cylindrical specimens. If auxiliary platens 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 th
32、e range 0,6 0,2 MPa/s (N/mms). After the application of the initial load, which does not exceed approximately 30% of the failure load, apply the load to the specimen without shock and increase continuously at the selected constant rate 10 %, until no greater load can be sustained. When using manuall
33、y 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 indicated in kN. NOTE Further guidance on loading rates for high and low strength concrete e.g. above
34、 80 MPa and below 20 MPa cube strengths, may be given in national Annex NA 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
35、specimens are shown in Figure 2 for cubes and in Figure 4 for cylinders. If failure is unsatisfactory this shall be recorded with reference to the pattern letter according to Figure 2 or 4 closest to that observed. NOTE Unsatisfactory failures can be caused by: DIN EN 12390-3:2009-07 EN 12390-3:2009
36、 (E) 7 insufficient attention to testing 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 results The compressive strength is given by the equation
37、: ccFfA= where fcis the compressive strength, in MPa (N/mm); F is the maximum load at failure, in N; 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 the specimen if tested
38、according to Annex B, in mm2. The compressive strength shall be expressed to the nearest 0,1 MPa (N/mm). 8 Test report The report shall include: a) identification of the test specimen; b) designated dimensions of the specimen or if tested in accordance with Annex B, actual dimensions; c) details of
39、adjustment by grinding/capping (if appropriate); d) date of test; e) maximum load at failure, in kN; 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) any deviations from the standard method of te
40、sting; i) a declaration from the person technically responsible for the test that it was carried out in accordance with this document, except as detailed in item h). The report may include: j) mass of the specimen; k) apparent density of specimen, to the nearest 10 kg/m3; l) condition of the specime
41、n on receipt; DIN EN 12390-3:2009-07 EN 12390-3:2009 (E) 8 m) curing conditions since receipt; n) time of test (if appropriate); o) age of specimen at time of test (if known). Explosive failure NOTE All four exposed faces are cracked approximately equally, generally with little damage to faces in co
42、ntact with the platens. Figure 1 Satisfactory failures of cube specimens NOTE T = tensile crack Figure 2 Some unsatisfactory failures of cube specimens DIN EN 12390-3:2009-07 EN 12390-3:2009 (E) 9 Figure 3 Satisfactory failure of cylinder specimen Figure 4 Some unsatisfactory failures of cylinder sp
43、ecimens DIN EN 12390-3:2009-07 EN 12390-3:2009 (E) 10 9 Precision Table 1 Precision data 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 compared with repeatability (r) or reproducibility (R).
44、 Test method Repeatability conditions Reproducibility conditions sr % r % sR% R % 100 mm cubes 150 mm cubes 3,2 3,2 9,0 9,0 5,4 4,7 15,1 13,2 NOTE 1 The precision data were determined as part of an experiment carried out in 1987 in which precision data were obtained for several of the tests describe
45、d in BS 1881. The experiment involved 16 operators. The concretes were made using an ordinary Portland cement, Thames Valley sand, and Thames Valley 10 mm and 20 mm coarse aggregates. NOTE 2 The difference between two test results from the same sample by one operator using the same apparatus within
46、the shortest feasible time interval will exceed the repeatability value r on average not more than once in 20 cases in the normal and correct operation of the method. NOTE 3 Test results on the same sample obtained within the shortest feasible time interval by two operators each using their own appa
47、ratus will differ by the reproducibility value R on average not more than once in 20 cases in the normal and correct operation of the method. NOTE 4 For further information on precision, and for definitions of the statistical terms used in connection with precision, see ISO 5725-1. Table 2 Precision
48、 data for measurements of the compressive strength of hardened concrete, expressed 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 sr % r % s
49、R% R % Cylinder (160 mm diameter, 320 mm height) 2,9 8,0 3,1 11,7 NOTE 1 The precision 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 38,87 MPa. NOTE 3 The precision data only includes the procedure of testing for compressive strength. DIN EN 12390-3:2009-07 EN 12390-3:
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