1、BRITISH STANDARD BS EN 12618-2:2004 Products and systems for the protection and repair of concrete structures Test methods Part 2: Determination of the adhesion of injection products, with or without thermal cycling Adhesion by tensile bond strength The European Standard EN 12618-2:2004 has the stat
2、us of a British Standard ICS 91.080.40 BS EN 12618-2:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 9 July 2005 BSI 9 July 2005 ISBN 0 580 44410 4 National foreword This British Standard is the official English language version of EN 12
3、618-2:2004. 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: A list of organizations represented on this committee can be obtained on request to its se
4、cretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Cat
5、alogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand
6、 the text; present to the responsible international/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. Summary of pages This document comprises a f
7、ront cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUR
8、OPISCHE NORM EN 12618 2 August2004 ICS91.080.40 Englishversion Productsandsystemsfortheprotectionandrepairofconcrete structuresTestmethodsPart2:Determinationofthe adhesionofinjectionproducts,withorwithoutthermalcycling Adhesionbytensilebondstrength Produitsetsystmespourlaprotectionetlarparationdes s
9、tructuresenbtonMthodesdessaiPartie2: Dterminationdeladhrencedesproduitsdinjection, aprscyclesthermiquesounonProcddadhrencepar traction ProdukteundSystemefrdenSchutzunddie InstandsetzungvonBetontragwerkenPrfverfahrenTeil 2:BestimmungderHaftzugfestigkeitvonRissfllstoffenmit oderohnethermischeBehandlun
10、gHaftzugfestigkeit ThisEuropeanStandardwasapprovedbyCENon27February2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropean Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcerningsuchnat
11、ional standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytranslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatu
12、sastheofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnite
13、dKingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN126182:2004:EEN 12618-2:2004 (E) 2 Contents p
14、age Foreword3 1 Scope4 2 Normative references4 3 Terms and definitions .4 4 Tests methods4 4.1 Principle4 4.2 Equipment5 4.3 Procedure.6 4.4 Injection6 4.5 Curing.6 4.6 Assessment of crack filling 6 4.7 Artificial ageing7 4.8 Measurement of tensile bond strength7 5 Calculation7 6 Test report8 7 Repr
15、oducibility.8 8 Repeatability.8 EN 12618-2:2004 (E) 3 Foreword This document (EN 12618-2:2004) has been prepared by Technical Committee CEN /TC 104, “Concrete and related products“, the secretariat of which is held by DIN. It has been drafted by Sub-Committee 8 “Products and systems for the protecti
16、on and repair of concrete structures“ (Secretariat AFNOR). 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 February 2005, and conflicting national standards shall be withdrawn at the latest by Feb
17、ruary 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy
18、, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 12618-2:2004 (E) 4 1 Scope This document describes a test method to determine the adhesion to hydraulic concrete of injection products. The test can be
19、 applied to polymer and cementetious injection products. The injection may be performed upon cracks in the dry, damp, wet or with water flowing through them. The tensile bond test should always be carried out after the appropriate period of curing under the standard conditions of test detailed below
20、, but may additionally be performed upon a further set of specimens after a period of artificial ageing by thermal cycling. The test can provide an opportunity for subjective assessment of injectability. 2 Normative references The following referenced documents are indispensable for the application
21、of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1504-1:1998, Products and systems for the protection and repair of concrete structures - Definitions, requirements, qua
22、lity control and evaluation of conformity - Part 1: Definitions. prEN 1504-5:2001, Products and systems for the protection and repair of concrete structures - Definitions, requirements, quality control and evaluation of conformity - Part 5 - Concrete injection. EN 1766, Products and systems for the
23、protection and repair of concrete structures - Test methods - Reference concretes for testing. EN 13687-3, Products and systems for the protection and repair of concrete structures - Test methods - Determination of thermal compatibility Part 3: Thermal cycling without de-icing salt impact. EN 24624:
24、1992, Paints and varnishes - Pull-off test (ISO 4624:1978) 3 Terms and definitions For the purposes of document, the terms and definitions given in EN 1504-1:1998, prEN 1504-5:2001 and EN 24624:1992 apply. 4 Tests methods 4.1 Principle The principle of this test is the tensile testing of composite s
25、pecimens in the form of a sandwich, concrete/injection product/concrete. These composite specimens are obtained by sawing or coring a composite test piece prepared by injecting the product into an artificial crack whose moisture content is controlled (dry, damp, wet or under water). The artificial c
26、rack is formed by placing two concrete slabs face to face. NOTE This artificial crack is preferred to natural crack obtained by splitting, due to a better control of the contact area between injection grout and concrete substrate, which is of importance in the measured load. The standard conditions
27、of test shall be (21 2) C and (60 10) % R.H. EN 12618-2:2004 (E) 5 4.2 Equipment 4.2.1 Tensile test machine Pull off test equipment according to 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 suffici
28、ent for most applications. The pull off equipment shall be capable of applying the load according to EN 24624 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, t
29、he so called failure load. 4.2.2 Loading fixtures (dollies) Circular dollies with a diameter of (50 0,5) mm or square dollies of (50 x 50 0,5) mm. The dollies are made of steel with a thickness of at least 20 mm or of aluminium with a thickness of at least 30 mm. On the side which the adhesive is to
30、 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 (4.2.1) that ensures the load can be applied normal to the surface under test, without bending or shear forces being applied to the test
31、 area. 4.2.3 Adhesive for bonding the dollies to the composite test piece and for bonding the three side “b“, “c“ and “d“ (Figures 1 and 2) of the slabs. Two components epoxy, polyester or acrylic adhesives have been found suitable. 4.2.4 Connections for attaching the dollies to the testing machine.
32、 These shall be of the self-aligning type, that is they shall be attached to the fixed and moving members respectively in such a way that they will move into self alignment as soon as any load is applied, so that the axis of the test specimen will coincide with the line of force supplied through the
33、 centre line of the connection assembly. 4.2.5 Diamond core drill, and barrel that enable the drilling of (50 0,5) mm cores. The core barrel should have a cutting edge which stands proud of the cylinder by (1,5 0,5) mm (to minimise lateral forces being applied to the test area). Or, 4.2.6 Saw for cu
34、tting specimens. The saw shall have a diamond or silicon carbide cutting edge and shall be capable of cutting specimens which conform to the prescribed dimensions without excessive heating or shock. 4.2.7 Conditioning chamber or cabinet capable of maintaining the composite test piece and the test sp
35、ecimens at the specified temperature and relative humidity, and, if required, (for test specimens only) to achieve the thermal ageing cycle specified in 4.7 below. 4.2.8 Injection equipment, including mixer, pressure pot or injection pump (manual or powered injection hoses, injection nipples/packers
36、). 4.2.9 Caulking or sealing compound for sealing the side “a“ (Figure 1) where the injection takes place, and for fitting any injection nipples, shall be chosen by the supplier of the injection product. 4.2.10 Concrete slabs, (1 000 x 500 x 40) mm cast from concrete specified in EN 1766, type MC 0,
37、45. The bottom faces shall be planar, sufficient to ensure that the gap width can be maintained within the permitted 30 % tolerance. 4.2.11 Pressure gauges The injection unit shall be equipped with a nozzle pressure gauge, to measure the injection pressure. The pressure gauge shall be constructed so
38、 that grout does not enter the gauge. 4.2.12 Grinding equipment, for cleaning adhesive from the used dollies. EN 12618-2:2004 (E) 6 4.2.13 Vernier calipers accurate to not less than 0,1 mm. 4.3 Procedure 4.3.1 Preparation of the composite test piece The bottom faces, as cast, of the concrete slabs s
39、hall be lightly grit-blasted to a surface roughness index between 0,20 and 0,25 according to EN 1766. The slabs shall be clamped together with their grit-blast sides face to face, using inert plastics spacers to achieve the required recommend crack width to a tolerance of 30 %. This is normally of t
40、he order 0,2 mm to 1 mm, but the material supplier may nominate any alternative crack width. The two concrete slabs shall be bonded together on sides “b“, “c“ and “d“ (Figure 1), apart from the final 100 mm of side “b“ 50 mm from side “c“, which shall be left unbounded as a vent. Steel clamps shall
41、be fixed as shown in Figures 2 and 3. The crack remaining open at side “a“ shall be prepared for injection by the procedure recommended by the supplier of the product under test. This may include the fitting of injection nipples and vents as inlet and outlet ports. NOTE Special care should be taken
42、when handling the composite test piece, weighing approximately 92 kg plus clamping apparatus ; appropriate tools (two wheeled trolley) should be used to promote safely handling. 4.3.2 Conditioning The composite test piece and the components of the product system shall be maintained under the standar
43、d test conditions or other selected and declared conditions, (e.g. 5 C or 35 C) for at least 48 h before proceeding. The specimen should be kept upright. Then : for injection into a dry crack: no further conditioning required; for injection into a damp crack : the crack shall be kept filled with tap
44、 water for 30 min, then emptied and allowed to drain for 10 min before proceeding with injection; for injection into a wet crack : soak crack as above, but proceed with injection immediately after emptying without any period of draining; for injection into a water filled crack : fill the crack with
45、water for 30 min, as above. Then proceed with injection without emptying the water. If required to prove that the system can be injected against a head of water, a water supply at the desired supply at the desired pressure may be connected to the outlet port. 4.4 Injection The components of the inje
46、ction product shall be mixed in accordance with the instruction of the supplier and then introduced into the crack via the tubes by the method specified by the supplier. The pressure at the inlet shall be measured (see 4.2.11). The injection is complete when unadulterated injection product is seen t
47、o emerge from the outlet port in side “b“ adjacent to side “c“. 4.5 Curing The injected test piece shall be maintained in the conditioning environment for 7 days, then at the standard test conditions for a further 7 days for resin injection systems, or a further 21 days for cementitious injection sy
48、stems. 4.6 Assessment of crack filling After curing, test piece shall be cut up and specimens shall be taken, according to the plan shown in Figure 4. Test specimens are 50 mm cores. If the adherence is deteriorated by coring (which is the case for ductile products with adherence lower than 0,5 N/mm 2 ), the test specimens are taken by sawing (50 x 50) mm blocs. EN 12618-2:2004 (E) 7 The specimens and sawn pieces shall be visually exa
