1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12636:1999 The Euro
2、pean Standard EN 12636:1999 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 Determination of adhesion concrete to concreteThis British Stan
3、dard, 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 September 1999 BSI 09-1999 ISBN 0 580 32586 5 BS EN 12636:1999 Amendments issued since publication Amd.
4、No. Date Comments National foreword This British Standard is the English language version of EN 12636:1999. The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/8, Repair and protection of concrete, which has the responsibility to: aid e
5、nquirers 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
6、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
7、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 itsel
8、f 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 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEAN STANDARD EN 12636 NORME
9、 EUROPENNE EUROPISCHE NORM May 1999 ICS 91.100.30 English version Products and systems for the protection and repair of concrete structures Test methods Determination of adhesion concrete to concrete Produits et systmes pour la protection et la rparation des structures en bton Mthodes dessais Dtermi
10、nation de ladhrence bton sur bton Produckte fr den Schutz und die Instandsetzung von Betontragwerken Prfverfahren Bestimmung der Verbundwirkung Beton-Beton This European Standard was approved by CEN on 16 April 1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which sti
11、pulate 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
12、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
13、 bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr
14、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 12636:1999 EPage 2 EN 12636:1999 BSI 09-1999 Foreword This European Standard has been prepared by Technical Commit
15、tee 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 endorsement, at the latest by November 1999, and con
16、flicting national standards shall be withdrawn at the latest by November 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,
17、 Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. It has been prepared by sub-committee 8, Products and systems for the protection and repair of concrete structures, (Secretariat AFNOR). Contents Page Foreword 2 1
18、 Scope 3 2 Normative references 3 3 Test method 3 3.1 Hardened concrete to hardened concrete 3 3.2 Fresh concrete to hardened concrete 3 4 Hardened concrete to hardened concrete 3 4.1 Equipment 3 4.2 Test procedure 4 4.3 Test report 5 5 Fresh concrete to hardened concrete 5 5.1 Equipment 5 5.2 Test
19、procedure 6 5.3 Test report 8 Annex A (informative) Bibliography 9Page 3 EN 12636:1999 BSI 09-1999 1 Scope This European Standard describes methods for the measurement of the adhesion of structural bonding agents between fresh or hardened concrete and a hardened concrete substrate. 2 Normative refer
20、ences 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 the
21、se 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, Methods of testing cement Part 1: Determination of strength. EN 1542:1999, Products and systems for the p
22、rotection and repair of concrete structures Test methods pull-off test. prEN 1766, Products and systems for the protection and repair of concrete structures Test methods Reference concretes for testing. EN 12189, Products and systems for the protection and repair of concrete structures Test methods
23、Determination of open time. 3 Test method 3.1 Hardened concrete to hardened concrete The adhesion between hardened concrete substrates is measured using the results from tensile bending tests performed on pairs of concrete test prisms which have been bonded using the bonding agent under test. For sa
24、tisfactory performance of the bonding agent, the tensile bending test should result in fracture in the concrete. When fracture occurs within the bond line it is considered that the structural bonding agent has not performed satisfactorily. Alternatively, the tensile bending test can be performed in
25、the presence of a longitudinal clamping force where the intended use involves the application of longitudinal prestress. 3.2 Fresh concrete to hardened concrete The method for the determination of the bond strength of fresh concrete adhesively bonded to hardened concrete involves coring through the
26、fresh concrete overlay beyond the bonded surface and into the hardened concrete substrate, and then performing a pull-off test. For satisfactory performance of the bonding agent the pull-off test should result in fracture in the concrete. When fracture occurs within the bond line it is considered th
27、at the structural bonding agent has not performed satisfactorily. 4 Hardened concrete to hardened concrete 4.1 Equipment 4.1.1 Steel moulds, for producing concrete test pieces of size 40 mm 40 mm 160 mm conforming to EN 196-1. 4.1.2 Concrete mixer, as in prEN 1766. 4.1.3 Grit blasting equipment.Page
28、 4 EN 12636:1999 BSI 09-1999 4.1.4 A stop clock, calibrated in minutes to a maximum of 120 min. 4.1.5 A suitable frame, for clamping the concrete test pieces together, for example, see Figure 1 of EN 12189. 4.1.6 Testing machine, capable of gradually applying a force of up to 20 kN during the tensil
29、e bending test. 4.1.7 Steel support frame, support rollers, loading rollers and spreader beam, as shown in Figure 1 for four point bending test on bonded concrete prisms. 4.1.8 Steel wire brush. 4.2 Test procedure 4.2.1 Sampling material The bonding agent to be tested shall be taken from one product
30、ion batch. 4.2.2 Number of test specimens Tensile bending tests shall be conducted on a minimum of three pairs of bonded concrete prisms. 4.2.3 Concrete prisms Concrete test prisms, measuring 40 mm 40 mm 160 mm and using reference concrete type MC (0,40) shall be manufactured and cured in accordance
31、 with prEN 1766. The test prisms shall be removed from the water and cut in half to form two prisms, each measuring 40 mm 40 mm 80 mm. Saw cutting shall be carried out on a suitable bench such that the flatness of the surface is to within a tolerance of 0,5 mm and spalling of the cut edges does not
32、exceed 1 % of the bonded area. The sawn concrete surfaces to be bonded shall be cleaned in running water using a steel wire brush and then grit blasted in accordance with prEN 1766. The test pieces shall then be conditioned as defined below depending upon whether bonding is to be carried out on a dr
33、y or wet hardened concrete substrate. 4.2.4 Conditioning The resin and hardener component of the bonding agent shall be conditioned before mixing to the test temperature of (21 2) C. a) Dry surface Condition test components for 48 h at (21 2) C and a RH of (60 10) %. Dust shall be removed by brushin
34、g immediately prior to application of the bonding agent. b) Wet surface Condition test components by immersion in water at room temperature for 48 h. The area to be bonded shall be placed in a vertical position for 15 min at (21 2) C and a RH of (60 10) % to allow free water to drain off before appl
35、ication of the bonding agent. c) Extreme temperatures For testing at extremes of environmental conditions, alternative conditioning and test temperatures as specified by the supplier shall be used.Page 5 EN 12636:1999 BSI 09-1999 4.2.5 Specimen preparation The components of the bonding agent shall b
36、e mixed at the test temperature and applied in a layer 1 mm thick, to the prepared concrete end faces of both prisms in each pair all in accordance with the manufacturers instructions. Appropriate spacers shall be used to control the thickness of the bonding agent. Immediately, the corresponding fac
37、es of the two concrete prisms in each pair shall be placed against the coated face and the two prisms clamped together to achieve a 1 mm to 2 mm thick bond line with no entrapped air voids. The complete assemblies shall then be cured at the test temperature for seven days or such other time that may
38、 be specified. 4.2.6 Measurement At the end of the specified curing period the bonded concrete prisms shall be positioned within the testing machine over a span of 150 mm as shown in Figure 1. The load shall then be applied vertically at the third span points by means of the spreader beam and increa
39、sed smoothly at the rate of (50 10) N/s until fracture. Alternatively, the tensile bending test may be performed on the pair of bonded concrete prisms in the presence of a longitudinal clamping force, as described in EN 12189. The load at failure and the position of the failure plane shall be record
40、ed for each pair of prisms. 4.3 Test report The report shall include the following information:a) identification of all the constituents in the adhesive mix including manufacturers name, code numbers if applicable, type description and date of production;b) the conditioning and test temperature;c) t
41、he substrate surface condition, dry or wet;d) curing period in days between bonding and testing;e) the method of clamping the concrete test pieces together;f) for each pair of bonded prisms: the elapsed time interval between application of the bonding agent and closing of the joint; the longitudinal
42、 clamping force imposed during the tensile bending test; the failure load recorded in the tensile bending test; the position of the failure plane;g) date of the test;h) reference to this European Standard. 5 Fresh concrete to hardened concrete 5.1 Equipment The equipment can be divided in two parts
43、depending on choice of test method, i.e. circular bonded dollies or friction grip. Friction grip should be used when the thickness of the top layer exceeds 40 mm.Page 6 EN 12636:1999 BSI 09-1999 5.1.1 Adhesively bonded dollies method (see Figure 2)a) mixer for the repair material as recommended by t
44、he manufacturer;b) climatic chambers for the conditions studied;c) vernier callipers accurate to not less than 0,1 mm;d) adhesive, rapid hardening two component epoxy or similar;e) grinding equipment;f) steel wire brush;g) cleaning solvent;h) diamond core drilling bit, internal diameter of (51 1) mm
45、. The core bit should have a cutting edge which protrudes from the cylinder by 1 mm to 2 mm (to minimize lateral forces being applied to the test area);i) pull-off test equipment, according to EN 1542 with a pulling capacity of at least 10 kN. The accuracy shall be within 2 %. The pull-off equipment
46、 shall be capable of applying the load according to EN 1542, 3.1, and shall be provided with a measurement device which displays the exerted force by an analogue or digital system. The measurement device shall retain the reading of maximum force exerted, the so-called failure load. The level of the
47、failure load should be recorded;j) cylindrical steel dollies, with a diameter of (50 0,5) mm and a height of at least 25 mm. On the side on which the adhesive is to be applied, the dolly shall be flat with a tolerance of 0,1 mm per 50 mm length. 5.1.2 Friction grip methoda) climatic chambers for the
48、 conditions studied;b) vernier callipers accurate to not less than 0,1 mm;c) diamond core drill with a diameter depending on friction grip used. The core bit should have a cutting edge which protrudes from the cylinder by 1 mm to 2 mm (to minimize lateral forces being applied to the test area);d) a
49、steel grip (see Figure 3) suitable for gripping cores of the specified diameter. It shall have an attachment for the pull-off test equipment, so that an axial tensile force may be smoothly applied to the core. The internal depth of the grip, i.e. the length of the core which can be accommodated above the annular clamp, shall be at least three times the nominal size of the largest aggregate in the composition being gripped, at least 1/3 of the thickness of the bonded layer and at least
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