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1、BRITISH STANDARD BS EN 13412:2002 Products and systems for the protection and repair of concrete structures Test methods Determination of modulus of elasticity in compression The European Standard EN 13412:2002 has the status of a British Standard ICS 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCE
2、PT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13412:2002 This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was
3、 published under the authority of the Standards Policy and Strategy Committee on 1 July 2002 BSI 1 July 2002 ISBN 0 580 39979 6 National foreword This British Standard is the official English language version of EN 13412:2002. The UK participation in its preparation was entrusted by Technical Commit
4、tee B/517, Concrete, to Subcommittee B/517/8, Protection and repair of concrete structures, 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 implement international or E
5、uropean publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to includ
6、e all the necessary provisions of a contract. Users of this publication 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 international/European
7、 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, pages
8、2 to 8, an inside back cover 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: sheffieldun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (
9、c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13412 May 2002 ICS 91.080.40 English version Products and systems for the protection and repair of concrete structures - Test methods - Determination of modulus of elasticity in compression Produits et systmes de protection et de rparation
10、des structures en bton - Mthodes dessai - Dtermination du module dlasticit en compression Produkte und Systeme fr den Schutz und die Instandsetzung von Betontragwerken - Prfverfahren - Bestimmung des Elastizittsmoduls im Druckversuch This European Standard was approved by CEN on 27 December 2001. CE
11、N 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 national standards may be obtained on app
12、lication 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 notified to the Management Centre has the
13、 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, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMM
14、ITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13412:2002 E Licensed Copy: sheffiel
15、dun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13412:2002 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Principle5 5Equipment.5 6Preparation of test specimens5 7Procedure .5 8Calculation6 9Report6 Annex A (normative) S
16、ummary of temperatures and humidities for the curing, conditioning and testing of repair products and systems. .8 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13412:2002 (E) 3 Foreword This document EN 13412:2002 has been prepared by T
17、echnical Committee CEN/TC 104 “Concrete and related products“, the secretariat of which is held by DIN. This document has been prepared by CEN/TC 104/SC 8 “Products and systems for the protection and repair of concrete structures“, the secretariat of which is held by AFNOR. This European Standard sh
18、all be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by December 2002. This European Standard is one of a series dealing with products and syst
19、ems for the protection and repair of concrete structures. Annex A is normative. 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
20、, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13412:2002 (E) 4 1 Scope This European Standa
21、rd specifies a method for the determination of the modulus of elasticity in compression for high creep strain repair products and systems, containing polymer binders (PC) and of mortars and concretes with polymer additives (PCC). This method is not intended for CC repair materials, for which testing
22、 according to prEN 123903 should be used. 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 ref
23、erences, subsequent amendments to or revisions 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 196-1, Methods of testing cem
24、ent Part 1: Determination of strength. EN 1504-1, Products and systems for the protection and repair of concrete structures - Definition, requirements, quality control, evaluation of conformity Part 1: Definitions. prEN 1504-31, Products and systems for the protection and repair of concrete structur
25、es - Definition, requirements, quality control, evaluation of conformity Part 3: Structural and non-structural repair. EN 12390-1, Testing of hardened concrete Part 1: Shape, dimensions and other requirements for specimens and moulds. prEN 12390-3, Testing of hardened concrete Part 3: Compressive st
26、rength of test specimens. 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 1504-1 and prEN 1504-32 and the following apply. 3.1 compressive stress the compressive force carried at any time by the test specimen, per unit of the original cross-s
27、ection 3.2 compressive strain the ratio of the change in the distance between two reference points along the axis of the test specimen per unit length of the original distance 3.3 elastic modulus the ratio of stress to corresponding strain below the proportional limit, where the proportional limit i
28、s the greatest stress which a material is capable of supporting without any deviation from the proportionality of compressive stress to compressive strain 1 Under preparation. 2 Under preparation. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (c)
29、BSI EN 13412:2002 (E) 5 3.4 secant modulus the ratio of stress to corresponding strain, measured relative to a level of pre-stress applied to bed firmly the specimen, platens and ball seating Accordingly, the secant modulus is based on the compressive stress required to reduce the gauge length of th
30、e test specimen by 0,2 % from a pre-stress of approximately 10 % of the expected force at 0,002 compressive strain. 3.5 creep the additional time-dependant strain that occurs in a test specimen under a constant applied stress 4 Principle The principle of this test is to measure the secant modulus of
31、 the specimen by the application of a controlled axial compressive load to a prism of 4:1 aspect ratio and relating longitudinal compressive strain to the compressive stress inducing it. A high rate of loading is used for PC or PCC specimens, compared with the procedure for CC specimens given in ISO
32、 6784 to counteract the effects of creep in the specimens, which can significantly reduce the calculated value of secant modulus. 5 Equipment 5.1Mortar mixer, in accordance with EN 196-1, or forced action pan mixer. 5.2Moulds, prisms 40 mm 40 mm 160 mm in accordance with EN 196-1. 5.3Strain gauges o
33、r compressometers, two are required. They shall each have a gauge length of at least 50 mm a maximum sensitivity of 50 m/m and be able to provide continuous indication of change in gauge length. 5.4Compression testing machine, suitable for the testing specimens of the dimensions given in (5.1) and c
34、onforming to the requirements of prEN 12390-4. 5.5Standard laboratory climate, of (21 2) C and (60 10) % RH in accordance with annex A. 6 Preparation of test specimens The components of the product under test shall be maintained at the standard test conditions (5.5) for at least 24 h before mixing.
35、A forced action mixer shall be used to prepare a batch of product in accordance with the manufacturers recommendations. NOTEFor preference a suppliers complete pack of pre-weighted components should be used, but where this is not practicable the proportioning of components should be in accordance wi
36、th the manufacturers specification. The mixed material shall then be compacted into prism moulds and fully cured following the manufacturers recommended procedure. At least three prisms are required as test specimens. The specimens shall be cured and stored as described in annex A. The moulds shall
37、be removed 24 h after preparation of the test specimens. 7 Procedure 7.1Conditions and conditioning: Immediately prior to testing, the test specimens shall be conditioned for at least 24 h under the standard conditions laid down in (5.5). Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 06:18:
38、33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13412:2002 (E) 6 7.2Measurement: Measure the width and thickness of each specimen at its middle to the nearest 0,1 mm and calculate the cross-sectional area. 7.3Fitting strain gauges: Fit two gauges to opposite cast faces of the specimen, their gauge
39、lengths being centrally disposed over the axis of the specimen. When attaching a strain gauge to a specimen, ensure that any distortion or damage to the specimen is minimal. There shall be no slippage between the grips of mechanical strain gauges and the specimen. 7.4Test loading: Place the specimen
40、 in the compression test machine in accordance with the procedure of prEN 12390-3. The load shall be applied at a rate of 2 N/s until a compressive strain of approximately 0,002 m/m is indicated. Record the applied load, N1. Using the same rate of loading, smoothly remove and then re-apply the same
41、load at least twice to ensure that the specimen and the platens are well seated and that the strain gauges are indicating consistently. If the individual strains are not within a range of 10 % of their mean value at N1, centre the specimen again and repeat the procedure. If the individual strains ar
42、e still not within a range of 10 % of their mean value at N1, the loading should be repeated at a higher loading rate, to a maximum of 10 N/s. NOTEWhere the above procedure does not produce a consistent result, for the strain at N1, this can be due to the effects of excessive creep strain. This effe
43、ct can be reduced by using a faster rate of load application. If, following repeat testing at a higher rate of loading, it is not possible to reduce the differences to within this range, do not proceed with the test. Next, zero the strain gauges (or the strain gauge recorder) while the specimen is u
44、nder a preload N2, which shall be approximately 10 % of N1. Measure the change in compressive strain () as the load is quickly cycled between loads N2 and N1. Four cycles shall be recorded, giving four values for andN. 8 Calculation Calculate the secant modulus by dividing the difference between the
45、 two levels of applied load (i.e. N1 N2) by the mean of the four measurements of change of strain (), expressing this as compressive stress per unit cross- sectional area. Calculate the mean secant modulus for a minimum of three specimens originating from the same mix. Express the value of the secan
46、t modulus to the nearest 100 N/mm2. 9 Report The following information shall be included in the test report: a) a reference to the test method standard; b) name and address of the test laboratory; c) identification number and date of the test; d) name and address of the manufacturer or supplier of t
47、he product; e) name and identification marks or batch number of the product; f) date of supply of the product; g) date of preparation of the test specimens and any deviation from the prescribed method of preparation, including the cross-sectional area of each test specimen; h) conditions of storage
48、of prepared specimens prior to test; Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13412:2002 (E) 7 i) date of test and details of the test equipment used, including the make, type of strain gauges and capacity and the calibration detai
49、ls or the identification number of the apparatus; j) the test results, including the upper (N1) and lower (N2) load levels used in the testing cycle, the mean compressive strain for each test specimen, the secant modulus of elasticity of each test specimen and the mean secant modulus of elasticity; k) precision data; l) date of test report and signature. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 06:18:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13412:2002 (E) 8 Annex A (normative) Summary of temperatures and