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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 15421999 The European Standard EN 15421999 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 s Measurement of bond strength by pull-off This British Standard, having 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 15421999 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the English language version of EN 15421999. 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 enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests ined; monitor related international and European 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 Standards Catalogue under the section entitled International Standards 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 Standard 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. 标准分享网 w w w .b z f x w .c o m 免费下载 w w w . b z f x w . c o m CEN European Committee for 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 and by any means reserved worldwide for CEN national Members. Ref. No. EN 15421999 E EUROPEAN STANDARDEN 1542 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 s Measurement of bond strength by pull-off Produits et syste mes pour la protection et la re paration des structures en be ton 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 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 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 versions. 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. w w w . b z f x w . c o m Page 2 EN 15421999 BSI 08-1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 104, Concrete perance, 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 endorsement, 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, Belgium, 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 for determining the pull-off bond strength of repair products and systems applied to a reference concrete. The is derived from EN 24624, Paints and Varnishes Pull-off test ISO 46241978, which is not appropriate for repair products and systems. Contents Page Foreword2 1Scope3 2Normative references3 3Principle3 4Equipment3 5Preparation4 5.1Preparation of the surface for application of the product4 5.2Number of test specimens4 6Procedure5 6.1Applying the repair products or system5 6.2Storage5 7Carrying out test5 7.1Core drilling6 7.2Applying the dolly6 7.3Setting the pull-off equipment6 7.4Applying the load6 7.5Determination of the type of failure6 7.6Validity of the test result6 7.7Calculation6 8Test report7 Annex A normative Summary of temperatures and humidities for the curing, conditioning and testing of repair products and systems7 A.1Curing7 A.2Conditioning and testing7 标准分享网 w w w .b z f x w .c o m 免费下载 w w w . b z f x w . c o m Page 3 EN 15421999 BSI 08-1999 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 for measuring the tensile bond strength of grouts, mortars, concretes and surface protection systems SPS 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 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 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 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. EN 196-1, s of testing cement Part 1 Determination of strength. EN 1504, Products and systems for the protection and repair of concrete structures Definitions, requirements, quality control and uation of conity. EN 246241992, Paints and varnishes Pull-off test ISO 46241978. prEN 1766, Products and systems for the protection and repair of concrete structures Test s Reference concretes for testing. ISO 5541976, Standard atmospheres for conditioning and/or testing Specifications. 3 Principle This Standard describes a for measuring the tensile bond strength of repair products and systems applied to standard reference concrete specimens prepared according to prEN 1766. The of test 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 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 concretes according to EN 196-1. The compaction 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 uni thickness of repair product or systems on top of the reference concrete 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 recommended by the manufacturer. 4.7 Circular dollies, with a diameter of 500,5 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 per 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 used for attaching the dolly to the pull-off 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-bristled brush. 4.10 Diamond core drill and barrel, that enable the drilling of a 501,0 mm cylinder through the repair product and system. The core barrel should have a cutting edge that stands proud of the cylinder by 1,50,5 mm to reduce lateral forces being applied to the test area. 4.11 Pull off test equipment, complying with EN 24624 with a pulling capacity sufficient to cause tensile bond failure of the specimen. The accuracy shall be within2 . 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 EN 246241992 and shall be provided with a measurement device that displays the rted force by an analogue or digital system. The measurement device shall retain the reading of maximum force rted. 4.12 Concrete test specimens, of dimension 300 mm 3 300 mm 3 100 mm, with a maximum aggregate size of 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. w w w . b z f x w . c o m Page 4 EN 15421999 BSI 08-1999 Dimensions in millimetres Key 1 2 Annulus around test area, ed by coring 50 mm diameter steel or aluminium dolly Figure 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 product 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 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 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, inside 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 product 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. NOTEOwing to the risk of some results being invalidated, due to abnormal types of failure, additional test specimens should be prepared, thereby avoiding delays if repeat testing is required. 标准分享网 w w w .b z f x w .c o m 免费下载 w w w . b z f x w . c o m Page 5 EN 15421999 BSI 08-1999 Dimensions in millimetres Key 1 2 3 4 Mould Product of system Thickness adjusted by fixing mould in position 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 laboratory 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 adding 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 recommended by the manufacturer shall be used. NOTEIt has been found that certain types of repair mortar can foam excessively 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 vertical 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 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 condition
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