1、BRITISH STANDARD BS EN 12618-3:2004 Products and systems for the protection and repair of concrete structures Test methods Part 3: Determination of the adhesion of injection products, with or without thermal cycling Slant shear method The European Standard EN 12618-3:2004 has the status of a British
2、 Standard ICS 91.080.40 BS EN 12618-3:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 24 June 2005 BSI 24 June 2005 ISBN 0 580 44407 4 National foreword This British Standard is the official English language version of EN 12618-3:2004. T
3、he UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/8, Protection present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor relat
4、ed international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.
5、 Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12618-3 August 2004 ICS 91.080.40 English version Products and systems for the protection and repair of concrete structures - Test methods - Part 3: Determination of the adhesion of inject
6、ion products, with or without thermal cycling - Slant shear method Produits et systmes pour la protection et la rparation des structures en bton - Mthodes dessai - Partie 3: Dtermination de ladhrence des produits dinjection, aprs cycles thermiques ou non - Mthode par cisaillement oblique Produkte un
7、d Systeme fr den Schutz und die Instandsetzung von Betontragwerken - Prfverfahren - Teil 3: Bestimmung der Haftzugfestigkeit von Rissfllstoffen mit oder ohne thermische Behandlung - Schrgscherfestigkeit This European Standard was approved by CEN on 27 February 2004. CEN members are bound to comply w
8、ith 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 Secreta
9、riat 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 officia
10、l versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
11、 Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. R
12、ef. No. EN 12618-3:2004: EEN 12618-3:2004 (E) 2 Contents page Foreword3 1 Scope4 2 Normative references4 3 Terms and definitions .4 4 Test method5 4.1 Principle5 4.2 Apparatus.5 4.3 Preparations.5 5 Test procedure.10 5.1 Sample10 5.2 Measurement10 5.3 Test conditions11 5.4 Compression testing.11 6 C
13、alculation and expression of results.12 7 Test report12 Annex A (normative) Procedure for capping composite test specimens .13 EN 12618-3:2004 (E) 3 Foreword This document (EN 12618-3:2004) has been prepared by Technical Committee CEN /TC 104, “Concrete and related products“, the secretariat of whic
14、h is held by DIN. It has been drafted by Sub-Committee 8 “Products and systems for the protection 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 late
15、st by February 2005, and conflicting national standards shall be withdrawn at the latest by February 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
16、 Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 12618-3:2004 (E) 4 1 Scope This document describes the m
17、ethod for determining the slant shear bond strength of all injection products intended to restore the integrity of cracked concrete and covered by prEN 1504-5. The test may be performed upon cracks injected in the dry, damp, wet or with water flowing through them. It should always be carried out aft
18、er the appropriate period of curing under the standard conditions of test detailed below, but may additionally be performed upon a further set of specimens after a period of artificial ageing by thermal cycling. Whilst the testing of the repaired crack is normally by short term static load, it may a
19、lso be performed as a creep test by long term static load, or as a dynamic test by the application of a cyclic load. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated ref
20、erences, the latest edition of the referenced document (including any amendments) applies. EN 196-1, Method of testing cements - Part 1: Determination of strength. EN 1504-1:1998, Products and systems for the protection and repair of concrete structures Definitions, requirements, quality control and
21、 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 protection and rep
22、air of concrete structures - Tests methods - Reference concretes for testing. EN 12390-1, Testing hardened concrete Part 1: Shape, dimensions and other requirements for test specimens and moulds. EN 12390-2, Testing hardened concrete Part 2: Making and curing specimens for strength tests. EN 12390-4
23、, Testing hardened concrete Part 4: Compressive strength - Specification for testing machines. EN 13687-4, Products and systems for the protection and repair of concrete structures - Tests methods - Determination of thermal compatibility - Part 4: Dry thermal cycling. 3 Terms and definitions For the
24、 purpose of this document, the terms and definitions given in EN 1504-1:1998 and prEN 1504-5:2001 apply. EN 12618-3:2004 (E) 5 4 Test method 4.1 Principle The principle of this test is the compressive testing of a restored concrete prism that is scarf jointed at 30 to its main axis, the joint having
25、 been formed by the injection repair of a straight line crack in the concrete (see Figure 3). The joint is thus subjected to a combination of shear and compressive stresses. The result is presented as the compressive strength of the composite prism (with observations upon the mode of failure), since
26、 this is easily related to conventional concrete appraisal and design procedures. The test specimens are produced by sawing prisms from concrete slabs which have been split in a controlled manner and repaired by injecting the product or system under test. Control specimens of concrete used in the pr
27、eparation of the slab are also prepared and tested in a similar manner to provide comparative information. 4.2 Apparatus 4.2.1 Compression testing machine conforming to EN 12390-4. 4.2.2 Moulds for casting the concrete slabs shall comply with the accuracy and tolerance requirements of EN 12390-1 and
28、 shall be of a size to produce slabs having the dimensions specified in 4.3.8. NOTE A suitable two-gang mould may be made by preparing a steel block 150 mm x 155 mm x 40 mm and machining a slot to receive it in two opposite faces of a 150 mm cube mould complying with EN 12390-1. This then forms two
29、mould cavities each 55 mm wide. 4.2.3 Trapezoidal mild steel plates, having dimensions shown in Figure 1, subject to a tolerance of 0,5 mm. 4.2.4 Elastomeric pads 150 mm x 150 mm. The characteristics of the elastomeric material need to be such as to ensure a relatively straight crack when splitting
30、a slab. 10 mm thick reinforced rubber sheet as used in conveyor belting has been found to be suitable, as has 6 mm thick unreinforced polyurethane elastomer sheet of 90 Shore A hardness. 4.2.5 Diamond saw, suitably mounted and capable of producing clean vertical cuts through the 55 mm thickness of t
31、he concrete slab. 4.3 Preparations 4.3.1 Preparation of concrete slabs The slabs shall be cast from a reference concrete of the type MC (0,40) or MC (0,45) as defined in EN 1766. After de-moulding they shall be cured for a total of 28 days in accordance with EN 12390-2 before any further conditionin
32、g or use. 4.3.2 Slab splitting Assemble the concrete slab with the trapezoidal plates and elastomeric pads as shown in Figure 1. Place this assembly between the platens of a press 1)and apply load evenly and smoothly until the slab fractures. This is illustrated at Figure 2. Release the load and rem
33、ove the assembly carefully from the press. Hold the two halves of the slab lightly together, to prevent loss of any debris from the crack. This may be done by lightly clamping the slab, or by fitting a stout rubber band round the slab before splitting. After removal of the top elastomeric pad and st
34、eel plates the slab is ready for use as a test piece. 1) The compression test machine at 4.2.1 may be used for this purpose, but a simple hand operated press of lesser specification will suffice. A force of about 300 kN may be required to split the plaque. EN 12618-3:2004 (E) 6 NOTE This will normal
35、ly give a crack width of the order of 0,2 mm to 0,5 mm. If it is desired to investigate the performance of the injection product in repairing wider cracks, the two halves of the slab may be further separated; this fact then need to be stated in the test report. 4.3.3 Preparation for injection Prepar
36、e the two ends of the crack, i.e. at the 55 mm faces, for injection by the procedure recommended by the supplier of the injection product. This may involve bonding metal or plastic tubes over the crack for use as inlet and outlet ports, or leaving a short length of crack unsealed if the injection no
37、zzle is to be applied direct to the concrete. Seal the remainder of the crack periphery by the procedure recommended by the supplier of the injection product. Before injection of the repair composition, condition the prepared split slab in the environment under which the injection of the product is
38、to proceed : Dry cracks. If the repair is to be carried out in dry concrete, allow the split slab to dry in air at the standard conditions of test for a period of not less than 16 h. Damp cracks. If the injection product is to be evaluated for the repair of damp concrete, treat as detailed below for
39、 wet cracks. At the end of the 48 h saturation period, remove the slab from the water and allow it to drain for 30 min before proceeding to inject. Wet cracks. If the repair is to be carried out in wet conditions, force water through the crack to displace all trapped air and then totally immerse the
40、 slab in lime-saturated water for a period of not less than 48 h. When ready to proceed with the injection, remove the slab from the water, allow the excess water to run out and then fit the injection hoses without any further delay. Water-filled cracks. If injection is to be carried out in water fi
41、lled cracks, the delivery hose of the injection equipment shall be fitted to the entry port whilst the slab is still under water. For convenience of injection, the slab may then be removed from the conditioning tank, without allowing the water to drain out of the crack. If it is required to prove th
42、at the resin system can be injected against a head of water, a water supply at the desired pressure may be connected to the outlet port. 4.3.4 Injection of the repair composition Condition the components of the injection system and the mixing vessel at the standard conditions of test (or other speci
43、fied conditions) for at least 16 h before proceeding. Support the slab with its principal axis vertical. The lower end of the crack shall be the entry port for the resin injection. Mix the components of the injection system in accordance with the manufacturers instructions. Introduce the mixed produ
44、ct into the crack via the entry port by the method stated in the manufacturers instructions. In the absence of specific instructions, inject the product from a mastic gun, grease gun, peristaltic pump or similar device. Maintain the flow of the product until all air (or water) has been displaced fro
45、m the crack and unadulterated product is flowing from the discharge port. Seal the discharge port. If required by the manufacturers instructions, raise the pressure of the product within the crack by further pumping. Seal the inlet port. Return the injected slab to the conditioning environment emplo
46、yed in 4.3.3 for a further 7 days for resin injection systems, or 28 days for cementitious systems, before proceeding to test as described in article 5, unless an alternative curing period is specified by the supplier of the injection product. 4.3.5 Thermal cycling If a test after artificial ageing
47、is to be conducted, a set of slabs produced as above for that purpose shall be subjected to the thermal cycling regime described in EN 13687-4 before proceeding. 4.3.6 Preparation of test specimens from composite slabs After the resin has cured, saw the slab into three sections, so that in the middl
48、e section the repair joint or interface bisects the prism at a nominal angle of 30 and runs of the prism on two opposite long sides, clear of the top and bottom (see Figure 3). Discard the outer sections of the sawn slab and use the middle section as the test specimen. EN 12618-3:2004 (E) 7 4.3.7 Pr
49、eparation of control specimens Control specimens of the reference concrete shall be of the same dimensions as the composite test specimens and shall be sawn from further slabs of the same mix used to prepare the slabs for those specimens, cast at the same time and conditioned along with them. 4.3.8 Dimensions of specimens Composite test specimens and control specimens shall be right true prisms having dimensions 55 mm x 55 mm x 150 mm sawn from slabs having dimensions 55 mm
