1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1542:1999 The Europ
2、ean Standard EN 1542:1999 has the status of a British Standard ICS 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Products and systems for the protection and repair of concrete structures Test methods Measurement of bond strength by pull-offThis British Standard, ha
3、ving 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 BSI 08-1999 ISBN 0 580 32439 7 BS EN 1542:1999 Amendments issued since publication Amd. No. Date Com
4、ments National foreword 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 structures, which has the responsibility to: aid enq
5、uirers to understand the text; present to the responsible European 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. A list of organizations represented on
6、 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 Standards Correspondence In
7、dex”, 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 Standard does not of itself
8、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.CEN European Committee for
9、Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 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 EUROPEAN STANDARD EN 154
10、2 NORME EUROPE ENNE EUROPA ISCHE NORM April 1999 ICS 91.010.30; 91.080.40 English version Products and systems for the protection and repair of concrete structures Test methods Measurement of bond strength by pull-off Produits et syste mes pour la protection et la re paration des structures en be to
11、n Me thodes dessais Mesurage de ladhe rence par traction directe Produkte und Systeme fu r den Schutz und die Instandsetzung von Betontragwerken Pru fverfahren Messung der Haftfestigkeit im Abreiversuch This European Standard was approved by CEN on 8 March 1999. CEN members are bound to comply with
12、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 application to the Central Secretariat
13、 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 Central Secretariat has the same status as the official ve
14、rsions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1542:1999 BSI 08-1999 Foreword This Europe
15、an Standard has been prepared by Technical Committee CEN/TC 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 identical text or by end
16、orsement, at the latest by October 1999, and conflicting national standards shall be withdrawn at the latest by October 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Bel
17、gium, Czech Republic, Denmark, Finland, France, 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 and systems
18、applied to a reference concrete. The method is derived from EN 24624, Paints and Varnishes Pull-off test (ISO 4624:1978), which is not appropriate for repair products and systems. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Principle 3 4 Equipment 3 5 Preparation 4 5.1 Preparation
19、of the surface for application of the product 4 5.2 Number of test specimens 4 6 Procedure 5 6.1 Applying the repair products or system 5 6.2 Storage 5 7 Carrying out test 5 7.1 Core drilling 6 7.2 Applying the dolly 6 7.3 Setting the pull-off equipment 6 7.4 Applying the load 6 7.5 Determination of
20、 the type of failure 6 7.6 Validity of the test result 6 7.7 Calculation 6 8 Test report 7 Annex A (normative) Summary of temperatures and humidities for the curing, conditioning and testing of repair products and systems 7 A.1 Curing 7 A.2 Conditioning and testing 7Page 3 EN 1542:1999 BSI 08-1999 1
21、 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, mortars, concretes and surface protection systems (SPS) used for the protection and repair
22、 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 European Standard incorporates by date
23、d 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 publications apply to this European Standard o
24、nly 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: Determination of strength. EN 1504, Products and systems for the protection and repair of concrete structures Definition
25、s, requirements, quality control and evaluation of conformity. EN 24624:1992, Paints and varnishes Pull-off test (ISO 4624:1978). prEN 1766, Products and systems for the protection and repair of concrete structures Test methods Reference concretes for testing. ISO 554:1976, Standard atmospheres for
26、conditioning and/or testing Specifications. 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 according to prEN 1766. The method of test is by direct dolly pull-off using a dol
27、ly 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 mixer, in accordance with EN 196-1 or concrete mixer, (forced action pan mixer). 4.2 Compaction tools and equipment, for repair grouts, mortars and c
28、oncretes according to EN 196-1. The compaction method shall be in accordance with the manufacturers instructions. 4.3 Standard laboratory climate, in accordance with the requirements of annex A. 4.4 Moulds, for producing a uniform thickness of repair product or systems on top of the reference concre
29、te specimen, made from non-absorbent, rigid material, not attacked by cement paste or polymers, into which the reference concrete specimen shall be placed (see Figure 2). 4.5 Vernier calipers, accurate to not less than 0,1 mm. 4.6 Rapid hardening two component epoxy adhesive, or similar, as recommen
30、ded by the manufacturer. 4.7 Circular dollies, with a diameter of (50 0,5) mm and with a thickness of at least 20 mm if made of steel, or with a thickness of at least 30 mm if made of aluminium. On the side to which the adhesive is to be applied, the dolly shall be flat with a tolerance of 0,1 mm pe
31、r 50 mm length. The dollies shall be provided with a means for attaching the pull-off test equipment (see 4.11) that ensures the load can be applied normal to the surface under test, without bending or shear forces being applied to the test area. The method used for attaching the dolly to the pull-o
32、ff test equipment shall normally incorporate a spherical seat, or otherwise the spherical seat shall be within the pull-off test equipment, to ensure the requirements of this subclause can be met. 4.8 Grinding equipment, for cleaning adhesive from the used dollies. 4.9 Steel wire brush and soft-bris
33、tled brush. 4.10 Diamond core drill and barrel, that enable the drilling of a (50 1,0) mm cylinder through the repair product and system. The core barrel should have a cutting edge that stands proud of the cylinder by (1,5 0,5) mm (to reduce lateral forces being applied to the test area). 4.11 Pull
34、off test equipment, complying with EN 24624 with a pulling capacity sufficient to cause tensile bond failure of the specimen. The accuracy shall be within 2 %. (A capacity of 10 kN is sufficient for most applications). The pull-off equipment shall be capable of applying the load according to 3.1 of
35、EN 24624:1992 and shall be provided with a measurement device that displays the exerted force by an analogue or digital system. The measurement device shall retain the reading of maximum force exerted. 4.12 Concrete test specimens, of dimension 300 mm3 300 mm3 100 mm, with a maximum aggregate size o
36、f 8 mm or 10 mm and prepared with a grit-blasted surface, according to prEN 1766. The strength grade shall be in accordance with EN 1504 series.Page 4 EN 1542:1999 BSI 08-1999 Dimensions in millimetres Key 1 2 Annulus around test area, formed by coring 50 mm diameter steel or aluminium dolly Figure
37、1 Plan of specimen showing dolly locations 5 Preparation Unless the repair product or system is intended to be used on horizontal surfaces only, as advised by the manufacturer, the application shall be to a vertical surface. 5.1 Preparation of the surface for application of the product The repair pr
38、oduct or system shall be applied to the grit-blasted surface of the reference concrete specimen (see 4.12) in either the dry or wet condition, as defined in annex A. To ensure the grit-blasted surface of the reference concrete specimens is free from contamination, it shall be cleaned using the steel
39、 wire brush (see 4.9) under running water immediately before the final conditioning and applying the repair product or systems, as follows: for a wet surface, the reference specimen shall be stood upright for 30 min; for a dry surface the reference specimen shall be conditioned for seven days in the
40、 standard laboratory climate (see 4.3) and immediately before applying the product, the test specimen shall be cleaned again using the soft-bristled brush. Following cleaning and conditioning, the bottom surface of the test specimen shall be indelibly marked and then the specimen placed on blocks, i
41、nside a mould (see 4.4) if required. The grit-blasted and cleaned surface shall then be secured in a vertical position (unless the product is intended to be used for application to horizontal surfaces only). 5.2 Number of test specimens A minimum of one test specimen is required for each repair prod
42、uct or system, from which five bond tests shall be carried out. The arrangement of the test areas, the sequence of tests and the numbering system to be employed is shown in Figure 1. The minimum acceptable number of tests giving a normal type of failure is three (see 7.6). NOTE Owing to the risk of
43、some results being invalidated, due to abnormal types of failure, additional test specimens should be prepared, thereby avoiding delays if repeat testing is required.Page 5 EN 1542:1999 BSI 08-1999 Dimensions in millimetres Key 1 2 3 4 Mould Product of system Thickness adjusted by fixing mould in po
44、sition Reference concrete specimen Figure 2 Section through specimen, showing mould in place 6 Procedure 6.1 Applying the repair products or system The product or system, together with the containers and tools to be used for preparing the mix and its application, shall be placed in the standard labo
45、ratory climate (see 4.3) for at least 24 h before use. Unless otherwise instructed by the manufacturer, use the following mixing technique for preparing the specimens. For PCC and cementitious mortar, use the mortar mixer (see 4.1) set to a low speed, pouring the gauging liquid to the bowl and addin
46、g the dry ingredients, mixing for a total period of 2 min. Where manufacturers instructions preclude use of part bags of materials, a concrete mixer (see 4.1) or other method recommended by the manufacturer shall be used. NOTE It has been found that certain types of repair mortar can foam excessivel
47、y under the action of the mortar mixer specified in EN 196-1. An alternative is to use a concrete mixer (see 4.1). The air content, strength and density of the CC and PCC mixes should normally be determined to characterize the mortar under test. 6.2 Storage The test specimens prepared in the vertica
48、l position shall be stored in this position for three days under the curing conditions specified in annex A. During the storage period, the faces of the test specimens shall be positioned at least 100 mm apart. Any moulds (see 4.4) shall be removed 24 h after application of the product or system of
49、products and then returned to the vertical position, unless stated otherwise by the manufacturer. Following the three days of vertical curing, the specimens may be laid horizontal and curing continued for the time specified in annex A. 7 Carrying out test Following the curing period, the test specimen shall be conditioned for seven days by storage in a standard laboratory climate, as specified in annex A. Towards the end of this seven day period, the specimen shall be prepared by fixing the dollies suc
