1、BRITISH STANDARD Products and systems for the protection and repair of concrete structure s Test methods Part 3: Determination of early age linear shrinkage for structural bonding agents The European Standard EN 12617-3:2002 has the status ofa British Standard ICs 91.080.40; 91.100.10 BS EN 12617-3
2、12002 WkNb A%“ U- rn% E rn NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW $ present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European
3、 developments and promulgate them in the UK. - 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 found in the BSI Cata
4、logue under the section entitled “International Standards Correspondence Index”, or by using the “Search”faci1ity ofthe BSI Electronic Catalogue or ofBritish Stan dards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their co
5、rrect application. Compliance with a British Standard does not ofitself confer immunity from legal obligations. 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 in t
6、his document indicates when the document was last issued. Amendments issued since publication Amd.No. I Date I Comments OBSI 12 July 2002 ISBN O 580 40085 9 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12617-3 May 2002 ICs 91.080.40; 91.100.10 English version Products and systems for the pro
7、tection and repair of concrete structures - 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
8、 produits de collage structural Produkte 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 com
9、ply with the CENLENELEC 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 application to the Management
10、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 same status as the officia
11、l 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 COMMITTEE FOR STANDARDIZATION E
12、UROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-I 050 Brussels O 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 E EN 12617-3:2002 (E) Contents Page Foreword .
13、 1 2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normative references . . . . .4 . 4 3 Principle 4 5 6 7 Test report Eq ui pment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Method
14、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Calculation of shrinkage 5 . 6 2 EN 12617-3:2002 (E) Foreword This document EN 1261 7-3 been prepared by Technical Committee CEN/TC 104 “Concrete and related produc
15、ts“, 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 November 2002, and conflicting national standards shall be withdrawn at the latest by December 2002. I
16、t was prepared by sub-committee 8 “Products and systems for the protection and repair 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 a
17、re: prEN 1261 7-1, Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Tesf mefhods - Par 1: Deferminafion of linear shrinkage. prEN 1261 7-2, Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Tesf mefhods - Par 2: Defermina fion of volumefric shrink
18、age. EN 1261 7-4, Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Tesf mefhods - Par 4: Defermina fion of shrinkage and expansion. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this
19、 European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3 EN 12617-3:2002 (E) 1 Scope This European Standard specifies a method for t
20、he determination of the early age linear shrinkage of structural bonding agents covered by EN 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
21、for measurement of early age shrinkage, for example up to 24 hours. 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 liste
22、d hereafter. For dated references, 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 150
23、4-1 , Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Definifions, requiremenfs, qualify con frol and evaluafion of conformify - Par 1: Definifions. prEN 1504-4, Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Definifions, requiremenfs, qualify
24、 con frol and evaluafion of conformify - Par 4: Sfrucfural bonding. 3 Principle In principle the test 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 sli
25、ding ends which bond to the polymer and are free to move as the polymer expands or contracts. Linear 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 Equi
26、pment 4.1 Mould A mould comprising a 400 mm long pressed steel trough supported on an insulating base 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,l mm. The inside of the trough is coated with polytetrafluor
27、oethylene (PTFE). Disposable linings which have surfaces prepared to enable the polymer samples to adhere 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
28、the sliding ends. A thermocouple is attached at the centre of the underside of the mould which enables 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
29、accuracy of f 0,Ol mm over a range of 5 mm and of producing an output which can be recorded on an automatic 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 t
30、he temperature of the polymer can be measured at any time during the hardening period. 4 EN 12617-3:2002 (E) 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 temperatu
31、re changes during hardening according to 5.3. 4.5 Environmental cabinet An environmental cabinet large enough to contain the mould as described in 5.1 in a horizontal position and capable of maintaining temperature (21 f 2) OC and relative humidity (60 f IO) %. 5 Method 5.1 Sampling material The pol
32、ymer to be tested shall be taken from one production batch of mortar. Each specimen shall be representative of 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 cabi
33、net as described in 5.5 for 24 hours to reach the required tem perature. The surfaces of the mould which come 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 hour
34、s to reach the test temperature. The temperature shall be measured by the thermocouple as described in 5.3. The 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 sil
35、icone is applied at the junction of the sliding end and the trough to prevent any leakage of the polymer. 5.4 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 t
36、he mould and compacted to form a uniform level layer maximum 10 mm deep. 5.5 Measurement of shrinkage and expansion As soon as the specimen preparation is complete the sliding ends are undamped and initial readings on the transducers and the thermocouples are taken. Record the readings for the slidi
37、ng end displacement and mould temperature at 5 minutes intervals until 1 hour after the initial gelation of the 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 h
38、ourly intervals for the subsequent 24 hours. On completion of the test measure and record the length of the hardened test specimen L, and the length of the mould between the centre lines of the transducer bases L, to the nearest 0,l mm. Owing to the exothermic nature of the hardening of polymers the
39、 temperature of the test specimen and trough will rise to a maximum and the trough will expand thus exaggerating 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 h
40、as occurred. However, corrections need to be made if a continuous readout of shrinkage is required. 5 EN 12617-312002 (E) 6 Calculation of shrinkage Calculate the change in length of each specimen, AL, , from the equation. AL, =6, +6, -6, where SI and S2 are the two transducer readings at either end
41、 of the specimen (in mm) (positive towards the centre of the specimen); is the thermal expansion of the mould given by: 83 6, = L,dTa, where Lm is the length of the mould between transducer fixings (in mm); AT is the change in temperature of the mould from ambient to the prescribed temperature (in K
42、) (values less than 5 K can be ignored); a, is the coefficient of thermal expansion of steel (1 1 x 1 O-6 IC). Then calculate the shrinkage strain, S, as a percentage, from the equation: s, =- x100 L, (3) where L, is the effective length of the hardened specimen at the ambient temperature (in mm). N
43、OTE shrinkage of the material at any particular moment of time. The method does not distinguish precisely between movements due to thermal expansion of the material and 7 Test report The following information shall be included in the test report: a) reference to this European Standard; b) name and a
44、ddress of the test laboratory; c) identification number and date of the test report; d) name and address of the 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
45、 any deviation from the prescribed method of preparation; 6 EN 12617-3:2002 (E) h) conditions of storage of prepared 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
46、 apparatus; j) tabulation of the results of shrinkage against time, specifying whether or not temperature correction has been applied, and natural scale graphs of these results; k) the time intervals from mixing the constituents to identification of initial gel; i) the calculated maximum value of sh
47、rinkage strain and the time to reach the value from completion of mixing the constituents for each specimen and their mean values; m) precision data; n) date of test report and signature. 7 EN 12617-3:2002 (E) Dimensions in millimetres - Tolerance f 0,l mm Key 1 Insulating base 2 Displacement transd
48、ucer 3 4 5 Pressed steel trough 6 7 Transducer 8 Insulating base Steel trough with PTFE lining Disposable liner to sliding end Sliding end fixed to transducer spindle Figure 1 -General arrangement of steel mould and transducers for measuring displacement and typical cross section 8 BS EN 126 17-3 12
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