1、DEUTSCHE NORM Julv 1999 Products and systems for the protection and repair of concrete structures - EN 1542 Test methods - Measurement of bond strength by pull-off English version of DIN EN 1542 ICs 91 .O1 0.30; 91.080.40 Produkte und Systeme fr den Schutz und die Instandsetzung von Betontragwerken
2、- Prfverfahren - Messung der Haftfestigkeit im Abreiversuch European Standard EN 1542 : 1998 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by CEN/TC 104. The responsible German body involved in its preparation was the Norme
3、nausschu Bauwesen (Building and Civil Engineering Standards Committee). DIN 5001 4 is the standard corresponding to International Standard IS0 554 referred to in clause 2 of the EN. National Annex NA Standard referred to (and not included in Normative references) DIN 5001 4 Artificial climates in te
4、chnical applications - Standard atmospheres EN comprises 9 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 1542 : 1999-0 V Deutsches Institut fur Normung e. V., Berlin. Luth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Stan
5、dards (DIN-Normen). English price group 06 . Sales No. 1106 o1 .o0 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1542 April 1999 ICs 91 .O1 0.30: 91.080.40 English version Products and systems for the protection and repair of concrete structures Test methods - Measurement of bond strength by
6、pull-off Produits et systmes pour la protec- tion et la rparation des structures en bton - Mthodes dessais - Mesurage de ladhrence par traction directe Abreiversuch Produkte und Systeme fr den Schutz und die Instandhaltung von Betontragwerken - Prfverfahren - Messung der Haftfestigkeit im This Europ
7、ean Standard was approved by CEN on 1999-03-08. CEN members are bound to comply with the CENKENELEC 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 concerni
8、ng such national stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist 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 la
9、nguage and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain
10、, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1999. CEN - All rights of exploitation in any form and by any means reserved worldwide fo
11、r CEN national members. Ref. No. EN 1542 : 1999 E Page 2 EN 1542 : 1999 Contents 1 scope . 3 2 Normative references . 3 3 Principle . 3 4 Equipment . 3 5 Preparation 4 5.1 5.2 Number of test specimens . 4 6 Procedure 5 6.1 6.2 Storage . 5 7 Carrying out test . 5 7.2 Applying the dolly . 6 7.3 Settin
12、g the pull-off equipment 6 7.4 Applying the load 6 7.5 Determination of the type of failure 6 7.6 Validity of the test result . 7 7.7 Calculation 7 8 Test rep0 rt . 7 Annex A (normative) and testing of repair products and systems . 9 A.l Curing 9 A.2 Conditioning and testing 9 Preparation of the sur
13、face for application of the product . 4 Applying the repair products or system 5 7.1 Core drilling 5 Summary of temperatures and humidities for the curing, conditioning Foreword This European Standard has been prepared by Technical Committee CEN/TC production. placing and compliance criteria)“. the
14、secretariat of which is held by DIN . 04 “Concrete (performance. This European Standard shall be given the status of a national standard. either by pi )kation of an identical text or by endorsement. at the latest by October 1999. and conflicting national standards shall be withdrawn at the latest by
15、 October 1999 . According to the CENKENELEC 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. Netherlan
16、ds. 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 applied to a reference concrete . The method is derived from EN 24624 “Paints and Varnishes . Pull-off test (I
17、S0 4624.1978)“. which is not appropriate for repair products and systems . Page 3 EN 1542 : 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 method for measuring the tensile bond strength of
18、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 method but some products may be used in repairs where it is applie
19、d 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, su
20、bsequent 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 1 96-1 , Methods of testing cement - Part 1 : Determination of
21、strength. EN 1 504, Products and systems for the protection and repair of concrete structures - Definitionsl requirementsl quality control and evaluation of con formity. EN 2462411 992, Paints and varnishes - Pull-off test (IS0 4624-1978). prEN 1766, Products and systems for the protection and repai
22、r of concrete structures - Test methods - Reference concretes for testing. IS0 554: 1 976, Standard atmospheres for conditioning andor testing - Specifications. 3 Principle This Standard describes a method for measuring the tensile bond strength of repair products and systems applied to standard ref
23、erence concrete specimens prepared according to prEN 1766. The method 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
24、-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 method shall be in accordance with the manufacturers instructions. 4.3 Standard laboratory climate in accordance with the requirements of
25、 Annex A. 4.4 Moulds for producing a uniform 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 cal
26、ipers accurate to not less than 0,l mm. 4.6 Rapid hardening two component epoxy adhesive, or similar, as recommended by the manufacturer. Page 4 EN 1542 : 1999 4.7 Circular dollies with a diameter of (50 I 0,5) mm and with a thickness of at least 20 mm if made of steel, or with a thickness of at lea
27、st 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,l mm per 50 mm length. The dollies shall be provided with a means for attaching the pull-off test equipment (see 4.1 1) that ensures the load can be applied normal to the
28、surface under test, without bending or shear forces being applied to the test area. The method 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 requireme
29、nts 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 (50 f 1 ,O) mm cylinder through the repair product and system. The core barrel should
30、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 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 I 2 %
31、. (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 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 r
32、etain the reading of maximum force exerted. 4.12 Concrete test specimens, of dimension 300 mm x 300 mm x 100 mm, with a maximum aggregate size of 8 mm or 10 mrn and prepared with a grit-blasted surface, according to prEN 1766. The strength grade shall be in accordance with EN 1504 series. 5 Preparat
33、ion 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
34、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 curface 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
35、 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 imme
36、diately 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-b
37、lasted and cleaned surface shall then be secured in a vertical position (unless the products 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 shal
38、l 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 test giving a normal type of failure is three (see 7.6). Page 5 EN 1542 : 1999 NOTE should be prepared, thereby avoiding delays if
39、 repeat testing is required. Owing to the risk of some results being invalidated, due to abnormal types of failure, additional test specimens 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
40、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,
41、 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 pari 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 c
42、ertain 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 characterise the mortar under test. 6.2 S
43、torage 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 1 O0 mm apart. Any moulds (see 4.4) shall be removed 2
44、4 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
45、 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 such that testing can take place at the end of
46、 the seventh day. 7.1 Core drilling Fasten the core drill and test specimen so that they cannot move or become loose. The drill should be free from significant vibration and should not allow lateral movement of the coring bit. Drill with a diamond coring barrel (see 4.10) with an axis at (90 I 1)“ t
47、o the surface. Drill through the repair product or system to a depth of (15 I 5) mm into the concrete substrate. Remove the diamond coring barrel without damaging the test specimen. NOTE The total drill-in depth is : di = dd + (15 i 5) where 4 is the total drill-in depth, in millimetres ; dd is the
48、thickness of the mortar layer, in millimetres Page 6 EN 1542 : 1999 7.2 Applying the dolly Clean the dolly using the 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
49、the surface of the specimen so that the adhesive forms a uniform layer between the dolly and the substrate. No adhesive shall penetrate into the clearance made by the coring barrel. Place the dolly on the core face so that the centre of the dolly 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 to 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
