1、BRITISH STANDARD Products and systems for the protection and repair of concrete structures - Test methods - Measurement of bond strength by pull-off The Europea Standard EN 15421999 has the status of a British Standard ICs 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT
2、LAW BS EN 1542:1999 STD-BSI BS EN LSLiZ-ENGL 1777 8 LbZ9bb7 0789794 255 m BS EN 1542:1999 been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 August 1999 Amd. No. O BSI
3、08-1999 National foreword Date Comments This British Standard is the English language version of EN 1542: 1999. The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/8, Protection and repair of concrete stnictures, which has the responsib
4、ility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the LJK interests informed - monitor related international and European developments and promulgate them in the UK. A list of organ
5、izations 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 Standards Catalogue under the section entitled “International Stan
6、dards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Stand
7、ard does not of itself 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 7 and a back cover. The BSI copyright notice displayed throughout this document indicates when the document was last issued. ISB
8、N O 580 32439 7 I I STD-BSI BS EN 1542-ENGL 1999 m lb24bb7 0789945 191 m EUROPEAN STANDARD EN 1542 NORME EXJR0PE”E EuROP 91.080.40 English version Products and systems for the protection and repair of concrete strums - %st methods - Measurement of bond stngth by pull-off Frots et systkmes pour la pr
9、otection et la rparation des stnictures en bton - Mthodes dessais - Mesurage de ladhrence par traction directe AbreiBverSuch Produkt und Systeme fr den Schutz und die Instandsetzung von Betontragwerken - =erfahren - Messung der Haftfestigkeit im This European Standard was approved by CEN on 8 March
10、1999. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipuate the conditions for giving this European Standard the status of a national standard without any alteration. Up-tedate hts and bibliographical references concerning such national standards may be obtained on
11、application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (Enghh, 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 Centrai Secretariat ha
12、s the same status as the official versions. CEN memberc are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germanx Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Com
13、mittee for Standarcbation Comit Europen de Normalisation Europisches Komitee fr Normung Centrai Secretariat: rue de Stassart 36, B-1060 Brussels O 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1542:1999 E Page 2 EN 1542:1999
14、 Foreword This European Standard has been prepared by kchnicai Committee CENEC 104, Concrete (performance, production, placing and compliance criteria), 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 ident
15、ical text or by endorsement, at the latest by October 1999, and conflicting national standards shall be withdrawn at the latest by October 1999. According to the CENEENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement thic European Stan
16、dard: AMa, Belgium, Czech Republic, Denmark, Finland, Rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standard describes a method for determining the pull-off bond strength of repair products
17、 and systems applied to a reference concrete. The method is derived from EN 24624, Paints and Varnishes - Pull-off test (IS0 46241978), which is not appropriate for repair products and systems. Contents Foreword 1 2 3 4 5 5.1 5.2 6 6.1 6.2 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 8 Scope Normative references P
18、rinciple Equipment Preparation Preparation of the surface for application of the product Number of test specimens Procedure Applying the repair products or system Storage Carrying out test Core drilling Applying the dolly Setting the puil-off equipment Applying the load Determination of the type of
19、failure Validity of the test result Calculation Test report Page 2 3 3 3 3 4 5 5 5 6 6 6 6 6 6 6 7 Annex A (normative) Summary of temperatures and humidities for the curing, conditioning and testing of repair products and systems 7 Al Curing 7 A2 Conditioning and testing 7 Q BSI 08-1999 STDbBSI BS E
20、N 1542-ENGL 1999 M Lb2qbb9 0789947 Tbi I 1 Scope This European Standard is one of a series dealing with products and systems for the protection and repair of concrete structures. It specifies a method for measuring the tensile bond strength of grouts, mom, concretes and surface protection systems (S
21、PS) used for the protection and repair of concrete. The provisions of the standard are applicable to products and systems applied to a maximum thickness of 50 mm in the test method but some products may be used in repairs where it is applied at more than 50 mm thickness. 2 Normative references This
22、European Standard incorporates by dakd 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 publicati
23、ons 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. EN 196-1, Methods of testing cement - Part 1: Determinutian of strength. EN 1504, Products and systems for ULe protection and r
24、epair of concrete structures - Definitions, requirements, quality control and evaluation of EN 24624 1992, Paints and varnishes - Pu-off test (IS0 4624 1978). prEN 1766, Products and systems for u1R protection and repair of comete structures - Test methods - Rqfwme concretes for testing. IS0 554: 19
25、76, Standard atmospheres .for conditioning ador testing - Speczfications. conformity. 3 Principle This Standard describes a method for measuring the tensile bond strength of repair products and systems applied to standard reference concrete specimens prepared accordmg to prEN 1766. The method of tes
26、t is by direct dolly pull-off using a dolly bonded to the surface of the repair product or system, with the test area having been defined by coring through the surface. 4 Equipment 4.1 Mortar m d, is the thickness of the mortar layer, in millimetres. 7.2 Applying the dolly Clean the dolly using the
27、grinding equipment as necessary (see 4.8), then degrease and dry the side of the dolly (see 4.7) onto which the adhesive (see 4.6) is to be applied. Apply a thin layer of adhesive to the surface of the specimen so that the adhesive forms a uniform layer between the dolly and the substrate. No adhesi
28、ve shall penetrate into the clearance made by the coring barrel. Place the dolly on the core face so that the centre of the doily coincides with the centre of the core. Apply sufficient pressure to the dolly to expel air, carefully and immediately removing any extruded adhesive. Allow the adhesive t
29、a harden in accordance with the manufacturers instructions. 7.3 Setting the pull-off equipment The pull off equipment (see 4.11) and its accessories shall be used in accordance with the manufacturers instructions. Place the puil-off equipment concentrically over the dolly and at (90 f i” to the core
30、d surface. Secure the equipment in such a way that its position will not change during the test. 7.4 Applying the load Increase the load continuously and eveniy at a rate of (0,05 * 0,Ol) MPds untii failure occurs. Record the load at failure and then determine the mean diameter of the specimen at th
31、e failure face as the average result of measurements taken perpendicularly to each other, across the core, using the vernier calipers (see 4.6). Avoid excessive fluctuations in applying the load, liable to occur for instance when using certain types of manually operated pull-off equipment. 7.6 Deter
32、mination of the type of failure From a visuai assessment, determine the type of failure of the specimen. The types of failure are as follows: A Cohesion failure in the concrete substrate; A43 Adhesion failure between the substrate and the first layer (e.g. primer, bonding slurry or mortar); B Cohesi
33、on failure in the first layer; B/C Adhesion failure between the first and second layer; C Cohesion failure in the second layer; (Etc., as defined by the particular product or system under test) -/Y Adhesion failure between the last layer and adhesive layer (e.g. C/Y in a two-layer repair system); Co
34、hesion failure in the adhesive layer; Adhesion failure between the adhesive layer and the dolly (which is Z). Y YE If there is a combination of these types of failure, a visual inspection shall be made of the failure face to find the percentage of each type of failure, based on the surface area, for
35、 example: 7.6 Validity of the test result For each test location, the load at failure is valid for all combinations of failure type, except where an abnormal failure OCCUIS. An abnormal failure is where the adhesive layer fails prematurely (i.e. where the surface includes part of a type Y, type YE o
36、r type -/Y failure). In this event the tensile bond strength for that location shall not be calculated. NOTE Abnormal failures may suggest the adhesive is unsuitable for use with the repair product or system under test and the manufacturers advice should be obtained. 7.7 Calculation For each test lo
37、cation yielding a normal failure, calculate the tensile bond strength, to the nearest 0,l MPa, using the following formula: A:A/B: B=40%: 10%: 50% h fh = where jjj is the bond of the test specimen, in megapascals; Fh is the failure load, in Newtons; D is the mean diameter of the test specimen, in mi
38、llimetres. The mean tensile bond strength shall then be determined from a minimum of three normal test results. If many abnormal failures occur, as defined in 7.6, further test specimens shall be prepared and tested until the required minimum number of results is obtained. O BSI 08-1999 STD-BSI BS E
39、N 3542-ENGL 3977 m Lb24bb9 0789953 475 m Page 7 EN 1542:1999 8 bst report The test report shall include the following information: a) a reference to this European Standard, including the number, titie and date of issue; b) the place, date and time of sampling and testing; c) identication of the type
40、, origin and designation of the repair product or system under test; d) methods used for preparation, curing and conditioning of the specimens; e) the thickness of repair mo*, f) the test date, age, type and roughness of the concrete; g) the diameter, thickness and the material of the dolly used and
41、 the type of adhesive; h) a description of the pull-off test equipment, stating the make, type, load capacity and measurement range; i) the failure load and the mean diameter for each location number from Figure 1; j) the individual tensile bond strength test results, and the mean results; k) the ty
42、pe of failure for each location; 1) any anomalies or points of note recorded during testing. Annex A (normative) Summary of temperatures and humidities for the curing, conditioning and testing of repair products and systems A.l Curing A.l.l CC (grouts, mortars and concretes) - prepare as EN 1961, co
43、ver in film for 24 h; - demould after 24 h; - cure under water at (21 f 2) “C for 27 days. A.1.2 PCC (grouts, mortars and concretes) - prepare as EN 196-1, cover in film for 24 h; - demould after 24 h and wrap in film for 48 h; - unwrap and cure for 25 days in a standard laboratory climate of (21 f
44、2) “C and (60 f 10) % relative huidi. A.1.3 PC (grouts, mortars and concretes) - prepare as IS0 554, - cure for 7 days at (21 relative humidity 2) “C and (60 f 10) % A.2 Conditioning and testing For specific applications, the following conditions apply: A.2.1 Standard laboratory climate (Dry conditi
45、oning): - take from the curing/st.orage environment and condition for 7 days in a standard laborabry climate of (21 f 2) “C and (60 f 10) % relative humidity - merse for 7 days at (21 f 2) “C, or for CC take directly for test after 28 days of immersion; - remove all surface water by standing upright
46、 for 30 min before using for tests. A.2.2 Wet conditioning: O BSI 08-1999 BS EN 1542:1999 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Stcuidards. It presents the UK view on standards in Europe and
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