BS EN 12617-3-2002 Products and systems for the protection and repair of concrete structures - Test methods - Determination of early age linear shrinkage for structural bonding age.pdf

1、BRITISH STANDARD BS EN 12617-3:2002 Products and systems for the protection and repair of concrete structures Test methods Part 3: Determination of early age linear shrinkage for structural bonding agents The European Standard EN 12617-3:2002 has the status of a British Standard ICS 91.080.40; 91.10

2、0.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 12617-3:2002 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 Stra

3、tegy Committee on 12 July 2002 BSI 12 July 2002 ISBN 0 580 40085 9 National foreword This British Standard is the official English language version of EN 12617-3:2002. The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/8, Protection an

4、d 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 European publications referred to in this document may be fo

5、und 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 include all the necessary provisions of a contract. Users are res

6、ponsible 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 committee any enquiries on the interpretation, or proposals for change, and ke

7、ep 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 2 to 8, an inside back cover and a back cover. The BSI copyright date displayed

8、 in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12617-3 May 2002 ICS 91.080.40; 91.100.10 English version Products and systems for the protection and repair of concrete struc

9、tures - Test methods - Part 3: Determination of early age linear shrinkage for structural bonding agents Produits et systmes pour la protection et la rparation des structures en bton - Mthodes dessai - Partie 3: Dtermination du retrait linaire au jeune ge pour les produits de collage structural Prod

10、ukte und Systeme fr den Schutz und die Instandsetzung von Betontragwerken - Prfverfahren - Teil 3: Bestimmung des zeitlichen Verlaufs des linearen Schrumpfens von Klebstoffen This European Standard was approved by CEN on 4 January 2002. CEN members are bound to comply with the CEN/CENELEC Internal R

11、egulations 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 application to the Management Centre or to any CEN member. This

12、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 same status as the official versions. CEN members are the na

13、tional 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 COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EURO

14、PISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12617-3:2002 EEN 12617-3:2002 (E) 2 Contents page Foreword3 1 Scope 4 2 Normative references 4 3

15、 Principle4 4 Equipment 4 5 Method 5 6 Calculation of shrinkage .6 7 Test report 6EN 12617-3:2002 (E) 3 Foreword This document EN 12617-3 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 th

16、e 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. It was prepared by sub-committee 8 “Products and systems for the protection and repair

17、of concrete structures“, the secretariat of which is held by AFNOR. This European Standard is one of a series of inter-related parts dealing with dimensional stability repair products and systems. The other parts are: prEN 12617-1, Products and systems for the protection and repair of concrete struc

18、tures - Test methods Part 1: Determination of linear shrinkage. prEN 12617-2, Products and systems for the protection and repair of concrete structures - Test methods Part 2: Determination of volumetric shrinkage. EN 12617-4, Products and systems for the protection and repair of concrete structures

19、- Test methods Part 4: Determination of shrinkage and expansion. 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, Gree

20、ce, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.EN 12617-3:2002 (E) 4 1 Scope This European Standard specifies a method for the determination of the early age linear shrinkage of structural bonding agents covered by EN

21、1504-1 and prEN 1504-4. It describes the procedures for the measurement of linear shrinkage from initial gel of polymer, in the form of unrestrained thin strips less than 10 mm in thickness. It is intended for measurement of early age shrinkage, for example up to 24 hours. 2 Normative references Thi

22、s 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 revisions of any of these publi

23、cations 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 1504-1, Products and systems for the protection and repair of concrete structures Definitions, re

24、quirements, quality control and evaluation of conformity - Part 1: Definitions. prEN 1504-4, Products and systems for the protection and repair of concrete structures Definitions, requirements, quality control and evaluation of conformity Part 4: Structural bonding. 3 Principle In principle the test

25、 is as follows : A freshly mixed sample of polymer shall be placed into a shallow steel trough shaped mould, the inside of which has been treated to prevent adhesion to the polymer. The mould has sliding ends which bond to the polymer and are free to move as the polymer expands or contracts. Linear

26、displacement transducers attached to the ends enable the shrinkage to be measured. Temperature sensors attached to the mould enable the temperature of the mould and the polymer to be measured. 4 Equipment 4.1 Mould A mould comprising a 400 mm long pressed steel trough supported on an insulating base

27、 and fitted with sliding stop ends, as shown in Figure 1. The sliding ends shall fit the cross section of the trough with a clearance of 0,1 mm. The inside of the trough is coated with polytetrafluoroethylene (PTFE). Disposable linings which have surfaces prepared to enable the polymer samples to ad

28、here to them are attached to the inner faces of the sliding ends. (A mechanical linkage may be needed for some polymers). Probes of linear displacement transducers are attached to the outer faces of the sliding ends. A thermocouple is attached at the centre of the underside of the mould which enable

29、s any exothermic temperature rise that occurs during the hardening (curing) of the polymer to be measured. 4.2 Linear displacement transducers Linear transducers which are capable of measuring to an accuracy of 0,01 mm over a range of 5 mm and of producing an output which can be recorded on an autom

30、atic recorder. 4.3 Thermocouples Thermocouples connected into a signal conditioning unit with automatic cold junction compensation, which gives a linear output proportional to temperature so that the temperature of the polymer can be measured at any time during the hardening period.EN 12617-3:2002 (

31、E) 5 4.4 Automatic recorder(s) An automatic recorder or recorders capable of recording the movements measured by the linear transducers according to 5.2 over a period of 24 hours and the temperature changes during hardening according to 5.3. 4.5 Environmental cabinet An environmental cabinet large e

32、nough to contain the mould as described in 5.1 in a horizontal position and capable of maintaining temperature (21 2) C and relative humidity (60 10) %. 5 Method 5.1 Sampling material The polymer to be tested shall be taken from one production batch of mortar. Each specimen shall be representative o

33、f the polymer being assessed. 5.2 Number of test specimens A minimum of three specimens shall be tested. 5.3 Conditioning of test materials All materials shall be conditioned in the test cabinet as described in 5.5 for 24 hours to reach the required temperature. The surfaces of the mould which come

34、into contact with the polymer shall be carefully treated with a thin film of suitable silicone release agent and then conditioned in the environmental cabinet as described in 5.5 for 24 hours to reach the test temperature. The temperature shall be measured by the thermocouple as described in 5.3. Th

35、e transducers as described in 5.2 shall be set at mid-stroke and the sliding ends clamped in this position whilst the filling of the mould with the polymer takes place. A small fillet of silicone is applied at the junction of the sliding end and the trough to prevent any leakage of the polymer. 5.4

36、Preparation of specimens The proportioning and mixing of the polymer shall be carried out in accordance with the manufacturers instructions. The mixed material shall be carefully placed in the mould and compacted to form a uniform level layer maximum 10 mm deep. 5.5 Measurement of shrinkage and expa

37、nsion As soon as the specimen preparation is complete the sliding ends are unclamped and initial readings on the transducers and the thermocouples are taken. Record the readings for the sliding end displacement and mould temperature at 5 minutes intervals until 1 hour after the initial gelation of t

38、he polymer has taken place (gelation can normally be detected by monitoring the inward movement of the ends). Record further readings at 15 minutes intervals during the next 23 hours and at hourly intervals for the subsequent 24 hours. On completion of the test measure and record the length of the h

39、ardened test specimen L sand the length of the mould between the centre lines of the transducer bases L mto the nearest 0,1 mm. Owing to the exothermic nature of the hardening of polymers the temperature of the test specimen and trough will rise to a maximum and the trough will expand thus exaggerat

40、ing the degree of shrinkage at this stage. Corrections can be made for this expansion but are not usually required as the trough returns to ambient temperature by the time maximum shrinkage has occurred. However, corrections need to be made if a continuous readout of shrinkage is required.EN 12617-3

41、:2002 (E) 6 6 Calculation of shrinkage Calculate the change in length of each specimen, s L , from the equation. 3 2 1 s L (1) where 1 and 2 are the two transducer readings at either end of the specimen (in mm) (positive towards the centre of the specimen); 3 is the thermal expansion of the mould gi

42、ven by: s m 3 T L (2) where m L is the length of the mould between transducer fixings (in mm); T is the change in temperature of the mould from ambient to the prescribed temperature (in K) (values less than 5 K can be ignored); s is the coefficient of thermal expansion of steel 1 6 10 11 K . Then ca

43、lculate the shrinkage strain, S m , as a percentage, from the equation: 100 s s m L L S (3) where L s is the effective length of the hardened specimen at the ambient temperature (in mm). NOTE The method does not distinguish precisely between movements due to thermal expansion of the material and shr

44、inkage of the material at any particular moment of time. 7 Test report The following information shall be included in the test report: a) reference to this European Standard; b) name and address of the test laboratory; c) identification number and date of the test report; d) name and address of the

45、manufacturer or supplier of the 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;EN 12617-3:2002 (E) 7 h) conditions of storage of prepa

46、red specimens prior to test; i) date of test and details of the test equipment used, including the make, type and capacity and the calibrations details or the identification number of the apparatus; j) tabulation of the results of shrinkage against time, specifying whether or not temperature correct

47、ion has been applied, and natural scale graphs of these results; k) the time intervals from mixing the constituents to identification of initial gel; l) the calculated maximum value of shrinkage strain and the time to reach the value from completion of mixing the constituents for each specimen and t

48、heir mean values; m) precision data; n) date of test report and signature.EN 12617-3:2002 (E) 8 Dimensions in millimetres Tolerance 0,1 mm Key 1 Insulating base 2 Displacement transducer 3 Steel trough with PTFE lining 4 Disposable liner to sliding end 5 Pressed steel trough 6 Sliding end fixed to t

49、ransducer spindle 7 Transducer 8 Insulating base Figure 1 General arrangement of steel mould and transducers for measuring displacement and typical cross sectionblankBS EN 12617-3:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standa