1、BS EN 1766:2017Products and systems forthe protection and repairof concrete structures Test methods Referenceconcretes for testingBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 1766:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implemen
2、tation of EN 1766:2017.It supersedes BS EN 1766:2000 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/517/8, Protection and repair of concrete structures.A list of organizations represented on this committee can be obtained on request to its secretary
3、.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 90284 0 ICS 91.080.40; 91.100.30 Compliance with a British Standar
4、d cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 1766:2017EUROPEAN STANDARD NORME EUROPENNE EUROPI
5、SCHE NORM EN 1766 February 2017 ICS 91.080.40 Supersedes EN 1766:2000English Version Products and systems for the protection and repair of concrete structures - Test methods - Reference concretes for testing Produits et systmes pour la protection et la rparationdes structures en bton - Mthodes dessa
6、is - Btons de rfrence pour essais Produkte und Systeme fr den Schutz und die Instandsetzung von Betontragwerken - Prfverfahren -Referenzbetone fr Prfungen This European Standard was approved by CEN on 4 December 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which st
7、ipulate 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 CEN-CENELEC Management Centre or to any CEN member. This Europea
8、n 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are t
9、he national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
10、ia, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form
11、 and by any means reserved worldwide for CEN national Members. Ref. No. EN 1766:2017 EBS EN 1766:2017EN 1766:2017 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Principle . 4 4 Equipment . 4 4.1 Concrete mixer (forced action pan mixer) . 4 4.2 Moulds . 4 4.3 High freq
12、uency vibrating table 4 4.4 Grit blasting equipment 5 4.5 Surface roughness measuring equipment . 5 5 Materials . 5 5.1 Aggregates . 5 5.2 Mixing water . 6 5.3 Cement 6 5.4 Admixtures 6 5.5 Grit for surface preparation by blasting . 6 5.6 Silica sand for measuring roughness . 6 6 Reference concrete
13、mixes 6 6.1 General 6 6.2 Reference concrete with 16 mm or 20 mm aggregate . 6 6.2.1 Compositions and properties (see Table 1) 6 6.3 Reference concrete with 8 mm or 10 mm aggregate 7 6.3.1 Compositions and properties (see Table 1) 7 6.4 Specimen preparation 10 6.5 Concrete curing and storage 10 7 Su
14、rface preparation and roughness index determination 10 7.1 Surface preparation 10 7.2 Measurement of the Roughness index 10 8 Report . 12 Annex A (informative) Grading curves 13 BS EN 1766:2017EN 1766:2017 (E) 3 European foreword This document (EN 1766:2017) has been prepared by Technical Committee
15、CEN/TC 104 “Concrete and related products”, 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 August 2017, and conflicting national standards shall be withdr
16、awn at the latest by November 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1766:2000. The main technical changes
17、 that have been made in this new edition are as follows: a) Definition of 3 new reference MC concretes; b) Definition of thresholds for the tensile bond strength for reference concretes C(0,40); C(0,45); C(O,70) and new MC concretes. According to the CEN-CENELEC Internal Regulations, the national st
18、andards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
19、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Serbia, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1766:2017EN 1766:2017 (E) 4 1 Scope This European Standard specifies the composition, characteristics and preparation procedure for referen
20、ce concrete substrates, which are to be used in the test methods to measure performances of products and systems for the repair and protection of concrete structures. The provisions of this Standard are applicable to concrete with a maximum aggregate size of 16 mm or 20 mm or with a maximum aggregat
21、e size of 8 mm or 10 mm. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docu
22、ment (including any amendments) applies. EN 197-1, Cement - Part 1: Composition, specifications and conformity criteria for common cements EN 206, Concrete Specification, performance, production and conformity EN 933-2, Tests for geometrical properties of aggregates - Part 2: Determination of partic
23、le size distribution - Test sieves, nominal size of apertures EN 934-2, Admixtures for concrete, mortar and grout Part 2: Concrete admixtures Definitions, requirements, conformity, marking and labelling EN 1008, Mixing water for concrete - Specification for sampling, testing and assessing the suitab
24、ility of water, including water recovered from processes in the concrete industry, as mixing water for concrete EN 1542, Products and systems for the protection and repair of concrete structures - Test methods - Measurement of bond strength by pull-off EN 12390-3, Testing hardened concrete - Part 3:
25、 Compressive strength of test specimens EN 12620, Aggregates for concrete 3 Principle Reference concrete test specimens with reproducible surface texture and appropriate strength are cast to enable the resistance against physical or chemical exposure of repair materials to be evaluated. The required
26、 surface roughness is obtained by grit blasting the surface of the hardened concrete. 4 Equipment 4.1 Concrete mixer (forced action pan mixer) 4.2 Moulds Moulds for producing concrete specimens, of non-absorbent, rigid material, not attacked by cement paste, of a size 300 mm 300 mm 100 mm or other s
27、izes specified in individual test method standards, corresponding to the property to be tested, shall be used. 4.3 High frequency vibrating table Or vibration rod suitable for compaction of the concrete in the moulds. BS EN 1766:2017EN 1766:2017 (E) 5 4.4 Grit blasting equipment It shall comply with
28、 the following: a) air pressure approximately 0,5 MPa; b) nozzle diameter 8 mm to 12 mm; c) the spread angle of the nozzle shall be sufficient to prevent the jet from cutting deeply into the concrete surface. This shall be demonstrated by preliminary test. NOTE As alternative, high pressure water-bl
29、asting equipment, capable of operating with or without the addition of grit, can be used subject to preliminary tests to confirm that the required surface texture can be achieved. 4.5 Surface roughness measuring equipment a) Measuring cylinder, of (25 1) ml total capacity and 20 mm maximum internal
30、diameter; b) disc, comprising a flat wooden disc (65 5) mm in diameter with a hard rubber disc of the same diameter (1,5 0,5) mm thick stuck to one face, the reverse face being provided with a handle (see Figure 1). Dimensions in millimetre Key 1 wooden disk 2 handle 3 rubber disk Figure 1 Disk for
31、surface roughness measurement 5 Materials 5.1 Aggregates Aggregates according to EN 12620 shall be natural and silica-based with low water absorption (less than 2 % by mass). The aggregate grading, measured according to EN 933-2, shall conform to the maximum sizes listed in clause 6.2 and 6.3 and ha
32、ve an appropriate size distribution in order to obtain BS EN 1766:2017EN 1766:2017 (E) 6 the mechanical properties specified for each type, i.e. tensile strength, tensile bond strength and compressive strength. Typical aggregate gradings for this purpose are exemplary, given in Annex A. 5.2 Mixing w
33、ater Water according to EN 1008 shall be used. 5.3 Cement Portland type CEM I 42,5 R according to EN 197-1 shall be used. 5.4 Admixtures Admixtures according to EN 934-2 shall be used. 5.5 Grit for surface preparation by blasting Commercial grit for grit-blasting of concrete shall be used, with grai
34、n size within the range of 0,25 mm to 1,0 mm. The grit shall not contain ferrous components such as chilled cast iron slag, which are prone to rusting. 5.6 Silica sand for measuring roughness Silica sand with a grain size of 0,05 mm to 0,1 mm, dried to a constant weight, shall be used. 6 Reference c
35、oncrete mixes 6.1 General This standard specifies eight types of reference concrete, defined by the maximum size of the aggregate and mix proportions. The reference concrete is chosen according to the type of product or system for the protection and repair of concrete structures and to the related t
36、est methods standards. NOTE 1 The water taken into account hereafter in the water/cement ratio is the added water plus the water already contained in the admixtures and the additions. Workability should be appropriate to achieve adequate placing of concrete with freedom from bleeding or segregation.
37、 Any special requirements for surface finish of placed specimens for particular test methods using reference concrete samples will be stated in those test methods. Admixtures conforming to EN 934-2 are permitted to give a workable concrete mix to meet the requirements of Table 1 or to confer adequat
38、e freezethaw resistance by entrainment of air. NOTE 2 The application of a suitable plasticizer or super plasticizer conforming to EN 9342 is likely to be required to achieve optimum compaction, as described in 6.4. 6.2 Reference concrete with 16 mm or 20 mm aggregate 6.2.1 Compositions and properti
39、es (see Table 1) 6.2.1.1 Type C (0,40) The mix shall contain 410/425 kg/m3cement and have a water/cement ratio of 0,40. Mixes shall have a 28 day mean compressive strength measured according to EN 12390-3 of (60 5) N/mm2for cubes and (50 5) N/mm2for cylinders, a median tensile bond strength by pull
40、off according to EN 1542 greater than 3 N/mm2. BS EN 1766:2017EN 1766:2017 (E) 7 6.2.1.2 Type C (0,45) The mix shall contain 360/375 kg/m3cement and have a water/cement ratio of 0,45. Mixes shall have a 28 day mean compressive strength measured according to EN 12390-3 of (50 5) N/mm2for cubes and (4
41、0 5) N/mm2for cylinders and, when applicable, a median tensile bond strength by pull off according to EN 1542 greater than 2,5 N/mm2. 6.2.1.3 Type C (0,70) The mix shall contain 260/275 kg/m3cement and a water/cement ratio of 0,70 0,05. Mixes shall have a 28 day mean compressive strength measured ac
42、cording to EN 12390-3 of (30 5) N/mm2for cubes and (25 5) N/mm2for cylinders and, when applicable, a mean bond strength by pull off according to EN 1542 greater than 1,5 N/mm2. 6.3 Reference concrete with 8 mm or 10 mm aggregate 6.3.1 Compositions and properties (see Table 1) 6.3.1.1 Type MC (0,40)
43、The mix shall contain 455/470 kg/m3cement and have a water/cement ratio of 0,40. After 28 days the reference concrete shall have an average tensile bond strength determined by pull off according to EN 1542 with a minimum value of 3,0 N/mm2, but not for any individual result. The pull off test shall
44、be carried out on the prepared concrete surface immediately before applying the material to be tested, using at least one substrate specimen from each batch of concrete. At least one in every 15 specimens shall be tested. NOTE The requirements are usually met by a concrete with a compressive strengt
45、h which satisfies class C50/60, as specified in EN 206. 6.3.1.2 Type MC (0,45) The mix shall contain 395/410 kg/m3cement and have a water/cement ration of 0,45. After 28 days the reference concrete shall have a median tensile bond strength determined by pull off, according to EN 1542 greater than 2,
46、5 N/mm2, but not for any individual result. The pull off test shall be carried out on the prepared concrete surface immediately before applying the material to be tested, using at least one substrate specimen from each batch of concrete. At least one in every 15 specimens shall be tested. NOTE The r
47、equirements are usually met by a concrete with a compressive strength which satisfies class C 40/50, as specified in EN 206. 6.3.1.3 Type MC (0,70) The mix shall contain 290/305 kg/m3cement and a water/cement ratio of 0,70 0,05. Mixes shall have a 28 day mean compressive strength measured according
48、to EN 12390-3 of (30 5) N/mm2for cubes and (25 5) N/mm2for cylinders and, when applicable, a median tensile bond strength by pull off according to EN 1542 greater than 1,5 N/mm2. 6.3.1.4 Type MC (0,75) The mix shall contain 235/240 kg/m3cement (10/8 mm) and a water/cement ratio of 0,75 0,05. Mixes s
49、hall have a 28 day mean compressive strength measured according to EN 12390-3 of (25 5) N/mm2for cubes and (20 5) N/mm2for cylinders and, when applicable, a median tensile bond strength by pull off according to EN 1542 greater than 1,2 N/mm2. BS EN 1766:2017EN 1766:2017 (E) 8 6.3.1.5 Type MC (0,90) The mix shall contain 195/210 kg/m3cement (10/8 mm) and a water/cement ratio of 0,90 0,05. Mixes shall have a 28 day mean compressive strength measured according to EN 12390-3 of (15 5) N/mm2for cubes and (12 5) N/mm2for c
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