DIN EN 12390-13-2014 Testing hardened concrete - Part 13 Determination of secant modulus of elasticity in compression German version EN 12390-13 2013《硬化混凝土试验 第13部分 弹性压缩割线模量的测定 德文版本.pdf

《DIN EN 12390-13-2014 Testing hardened concrete - Part 13 Determination of secant modulus of elasticity in compression German version EN 12390-13 2013《硬化混凝土试验 第13部分 弹性压缩割线模量的测定 德文版本.pdf》由会员分享，可在线阅读，更多相关《DIN EN 12390-13-2014 Testing hardened concrete - Part 13 Determination of secant modulus of elasticity in compression German version EN 12390-13 2013《硬化混凝土试验 第13部分 弹性压缩割线模量的测定 德文版本.pdf（16页珍藏版）》请在麦多课文档分享上搜索。

1、June 2014 Translation by DIN-Sprachendienst.English price group 10No 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!%2m:“2157423www.din.deDDIN EN 12390-13Testing hardened concrete Part 13: Determination of secant modulus of elasticity in compression;English version EN 12390-13:2013,English translation of DIN EN 12390-13:2014-06Prfung von Festbeton Teil 13: Bestimmung des Elastizittsmoduls unter Druckbela

3、stung (Sekantenmodul);Englische Fassung EN 12390-13:2013,Englische bersetzung von DIN EN 12390-13:2014-06Essai pour bton durci Partie 13: Dtermination du module scant dlasticit en compression;Version anglaise EN 12390-13:2013,Traduction anglaise de DIN EN 12390-13:2014-06www.beuth.deDocument compris

4、es 16 pagesIn case of doubt, the German-language original shall be considered authoritative.05.14DIN EN 12390-13:2014-06 2 A comma is used as the decimal marker. National foreword This document (EN 12390-13:2013) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products” (Se

5、cretariat: DIN, Germany) The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Working Committee NA 005-07-05 AA Prfverfahren fr Beton. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12390-13 October 2013

6、ICS 91.100.30 English Version Testing hardened concrete - Part 13: Determination of secant modulus of elasticity in compression Essais pour bton durci - Partie 13: Dtermination du module scant dlasticit en compression Prfung von Festbeton - Teil 13: Bestimmung des Elastizittsmoduls unter Druckbelast

7、ung (Sekantenmodul)This European Standard was approved by CEN on 21 September 2013. 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 an

8、d bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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

9、responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugosla

10、v Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE

11、 NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12390-13:2013 EEN 12390-13:2013 (E) 2 Contents Page Foreword 3 1 Sc

12、ope 4 2 Normative references 4 3 Terms and definitions, symbols and scripts 4 4 Principle 6 5 Apparatus .6 6 Test specimens 7 7 Method 7 8 Calculation of secant modulus of elasticity . 12 9 Test report . 13 10 Precision 13 Bibliography . 14 DIN EN 12390-13:2014-06 EN 12390-13:2013 (E) 3 Foreword Thi

13、s document (EN 12390-13:2013) 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 la

14、test by April 2014, and conflicting national standards shall be withdrawn at the latest by April 2014. 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 all suc

15、h patent rights. It is based on an extensive investigation and comparison of existing National Standards: ASTM, BS, DIN, ISO, NORD TEST and UNI followed by the analysis of a test programme involving five laboratories carried out by UNI. This standard is one of a series concerned with testing concret

16、e. The series EN 12390, Testing hardened concrete, consists of the following parts: Part 1: Shape, dimensions and other requirements of specimens and moulds Part 2: Making and curing specimens for strength tests Part 3: Compressive strength of test specimens Part 4: Compressive strength - Specificat

17、ion for testing machines Part 5: Flexural strength of test specimens Part 6: Tensile splitting strength of test specimens Part 7: Density of hardened concrete Part 8: Depth of penetration of water under pressure Part 13: Determination of secant modulus of elasticity in compression According to the C

18、EN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hung

19、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12390-13:2014-06 EN 12390-13:2013 (E) 4 1 Scope This European Standard specifies the method for th

20、e determination of the secant modulus of elasticity in compression of hardened concrete on test specimens which may be cast or taken from a structure. The test method allows the determination of two secant moduli of elasticity: the initial modulus, EC,0measured at first loading and the stabilized mo

21、dulus, EC,Smeasured after three loading cycles. Two different test methods are given. The first (method A) is for determination of both initial and stabilized moduli, the second (method B) is for determination of stabilized modulus only. 2 Normative references The following documents, in whole or in

22、 part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12390-1, Testing hardened concrete Part 1:

23、Shape, dimensions and other requirements of specimens and moulds EN 12390-2, Testing hardened concrete Part 2: Making and curing specimens for strength tests EN 12390-3, Testing hardened concrete Part 3: Compressive strength of test specimens EN 12390-4, Testing hardened concrete Part 4: Compressive

24、 strength Specification for testing machines EN 12504-1:2009, Testing concrete in structures Part 1: Cored specimens Taking, examining and testing in compression EN ISO 9513, Metallic materials Calibration of extensometer systems used in uniaxial testing (ISO 9513) 3 Terms and definitions, symbols a

25、nd scripts 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 initial secant modulus of elasticity EC,0secant slope of the stress strain curve at first loading 3.1.2 stabilized secant modulus of elasticity EC,Ssecant slope of the stress stra

26、in curve after three loading cycles 3.1.3 base or gauge length length used as reference base for strain measurement 3.1.4 measuring line straight line laying on the lateral surface of the specimen and parallel to the vertical axis (see Figure 1) DIN EN 12390-13:2014-06 EN 12390-13:2013 (E) 5 Key 1 m

27、easuring line Figure 1 Measuring line on cylinder and prismatic specimens 3.2 Symbols and scripts For the purposes of this European Standard, the symbols and scripts in Table 1 apply. Table 1 Symbols and scripts (1 of 2) Symbol Explanation EC,0Initial secant modulus of elasticity EC,SStabilized seca

28、nt modulus of elasticity Measured strain L Change in measured length L0Initial gauge length of instrument L Specimen length d Specimen diameter or width D Upper sieve size (for definition of aggregates size, see EN 12620) DmaxDeclared value of D of the coarsest fraction of aggregates actually used i

29、n the concrete fcCompressive strength of concrete determined by testing companion specimens cylinders, prisms, cubes or cores or estimated from non-destructive tests aNominal upper stress = fc/ 3 bNominal lower stress arbitrary value between 10 % and 15 % of fcpNominal preload stress arbitrary value

30、 between 0,5 MPa and baStrain along each measuring line at upper stress bStrain along each measuring line at lower stress pStrain along each measuring line at preload stress a, nAverage strain at upper stress on loading cycle n b, nAverage strain at lower stress on loading cycle n DIN EN 12390-13:20

31、14-06 EN 12390-13:2013 (E) 6 Table 1 (2 of 2) Symbol Explanation p, nAverage strain at preload stress on loading cycle n ma Measured stress corresponding to nominal upper stress, amb Measured stress corresponding to nominal lower stress, bmp Measured stress corresponding to nominal preload stress, p

32、 Difference between measured stresses ma and mb (Method A) or ma and mp (Method B) 0Strain difference during first loading cycle sStrain difference during third loading cycle 4 Principle A test specimen is loaded under axial compression, the stresses and strains are recorded and the slope of the sec

33、ant to the stress-strain curve is determined at first loading (Method A only) and after three loading cycles (Methods A and B). The secant slope is known as the secant modulus of elasticity in compression. The test specimens may be either cast or taken from an existing structure. 5 Apparatus 5.1 Tes

34、t machine Compression testing machine conforming to EN 12390-4 with following additional requirements: a) suitable for execution of programmable loading cycles; b) able to increase and decrease the load at a constant rate within a given tolerance (see 7.3.1 and 7.3.2); c) able to maintain a constant

35、 load at selectable nominal values with a maximum variation within 5 %; d) calibrated as Class 1 to EN 12390-4 over the working range from the lower stress to the upper stress as defined in 7.3.1 and 7.3.2 . NOTE The test lends itself to the use of automatic control test machines. However, if manual

36、 control test machines can be shown to comply with b), c) and d) above, they can be used. 5.2 Instrumentation Instrumentation measuring the strain of the specimen under axial compression along a measuring line shall be Class 2 as determined in accordance with EN ISO 9513 in the range from 0 m/m to 1

37、 000 m/m. The instrumentation can measure strain directly (e.g. resistive strain gauges) or take the form of measuring length change from which the strain, , is calculated with the formula: 0LL = (1) DIN EN 12390-13:2014-06 EN 12390-13:2013 (E) 7 5.3 Base or gauge length The base or gauge length of

38、the strain measuring instrument shall be between two-thirds of the specimen diameter (or section width) and one-half of the specimen length and not less than 3Dmax. NOTE For specimens where L/d is between 3,5 and 4,0, the gauge length can be increased to up to 2/3 of the specimen length. 6 Test spec

39、imens 6.1 Shape and dimensions of specimens The test specimens shall be moulded (cylinder or prism) or drilled cores complying with the requirements of EN 12390-1 or EN 12504-1. The dimension d (diameter or width) shall be at least 3,5 times Dmax. The ratio between the specimen length L and the dime

40、nsion d shall be in the range 2 L/d 4. The recommended test specimen shall be cylinders of diameter 150 mm and height 300 mm (reference specimen). Alternatively, other test specimens generally complying with the requirements of EN 12390-1 may be used, provided that the specimen complies with the dim

41、ensions and aggregate size to diameter or width stated above. In the case of specimens drilled or cut from a structure, this requirement sometimes cannot be fulfilled; in such cases, this shall be stated in the test report. NOTE The size of the test specimen can have an influence on the result. If r

42、elevant, the adjustment of test specimen shall comply with EN 12390-3. Companion specimens should be available for the determination of compressive strength as described in 7.2 and shall be made from the same batch of concrete in the case of cast specimens, or shall be drilled from the same zone in

43、the case of drilled specimens. 6.2 Curing, storage and conditioning Moulded specimens shall be cured or stored in accordance with EN 12390-2, cored specimen in accordance with EN 12504-1. Before testing they shall be maintained at (20 2) C for sufficient time for strain measuring instruments to be s

44、ecurely fixed but not longer than 24 h out of water. During the time out of water, precautions shall be taken to ensure the specimen remains moist. 7 Method 7.1 Specimen instrumentation and positioning The strain measuring instruments shall be positioned in such a way that the measuring base is at e

45、quivalent distance from the end faces of the specimen. At least two strain measuring instruments shall be symmetrically arranged with respect to the central axis of the specimen. The specimen shall be centred on the lower platen. 7.2 Determination of compressive strength The compressive strength of

46、concrete fcshall be determined in accordance with EN 12390-3 on companion specimen(s) preferably having the same size and shape of those specimens used for secant modulus of elasticity determination. DIN EN 12390-13:2014-06 EN 12390-13:2013 (E) 8 If the companion specimens are not of the same size a

47、nd shape as the specimen used for the determination of secant modulus of elasticity, the difference in compressive strength obtained from specimens of different shape and sizes shall be taken into account. The compressive strength (measured or estimated), fcis used to define the stress levels of the

48、 test cycle for the determination of secant modulus of elasticity. If companion test specimens for the determination of compressive strength are not available, the compressive strength may be estimated from non-destructive tests or by national provisions valid in the place of use of the concrete. De

49、tails of the test method and results from the non-destructive method adopted shall be indicated in the test report. 7.3 Determination of secant modulus of elasticity 7.3.1 Method A Determination of initial and stabilized secant modulus of elasticity 7.3.1.1 Preloading cycles Three preloading cycles are carried out in order to check the wiring stability (first check) and specimen positioning (second check). Place the test specimen, with the measuring instruments attached