1、May 2017 English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.080.40!%de“2659666www.din.deDIN E
2、N 1766Products and systems for the protection and repair of concrete structures Test methods Reference concretes for testing;English version EN 1766:2017,English translation of DIN EN 1766:2017-05Produkte und Systeme fr den Schutz und die Instandsetzung von Betontragwerken Prfverfahren Referenzbeton
3、e fr Prfungen;Englische Fassung EN 1766:2017,Englische bersetzung von DIN EN 1766:2017-05Produits et systmes pour la protection et la rparation des structures en bton Mthodes dessais Btons de rfrence pour essais;Version anglaise EN 1766:2017,Traduction anglaise de DIN EN 1766:2017-05SupersedesDIN EN
4、 1766:200003See start of applicationwww.beuth.deDocument comprises 16 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.04.17 DIN EN 1766:2017-05 2 A comma is used as the decimal marker. Start of application The start of applicat
5、ion of this standard is 2017-05-01. For DIN EN 1766:2000-03 there is a transition period ending on 2018-11-30. National foreword This document (EN 1766:2017) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products” (Secretariat: DIN, Germany). The responsible German body i
6、nvolved in its preparation was DIN-Normenausschuss Bauwesen (DIN Standards Committee Building and Civil Engineering), Working Committee NA 005-07-06 AA “Protection, repair and strengthening of concrete structures (national mirror committee for CEN/TC 104/SC 8)”. Amendments This standard differs from
7、 DIN EN 1766:2000-03 as follows: a) three new reference MC concretes have been defined; b) thresholds for the tensile bond strength for reference concretes types C(0,40), C(0,45) and C(0,70) and new MC concretes have been defined. Previous editions DIN EN 1766: 2000-03 EUROPEAN STANDARD NORME EUROPE
8、NNE EUROPISCHE 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 - Mth
9、odes dessais - 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 Regulation
10、s 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 CEN-CENELEC Management Centre or to any CEN member. Th
11、is 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN mem
12、bers are the 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, Portu
13、gal, Romania, 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 i
14、n any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1766:2017 EEN 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 frequency
15、 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 mixes
16、 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 Surface
17、 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 DIN EN 1766:2017-05 EN 1766:2017 (E) 3 European foreword This document (EN 1766:2017) has been prepared by Technical Committee
18、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
19、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
20、 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
21、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,
22、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Serbia, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1766:2017-05 EN 1766:2017 (E) 4 1 Scope This European Standard specifies the composition, characteristics and preparation procedure for re
23、ference 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 agg
24、regate 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
25、 document (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 p
26、article 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 s
27、uitability 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 - Pa
28、rt 3: 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 req
29、uired 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 ot
30、her sizes 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. DIN EN 1766:2017-05 EN 1766:2017 (E) 5 4.4 Grit blasting equipment It shall c
31、omply with 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 pressur
32、e water-blasting 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
33、 internal 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
34、 Disk for 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
35、6.3 and have an appropriate size distribution in order to obtain DIN EN 1766:2017-05 EN 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
36、A. 5.2 Mixing water 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
37、used, with grain 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
38、. 6 Reference concrete 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 t
39、o the related test 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
40、or segregation. 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
41、 confer adequate 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 Compositio
42、ns and properties (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 st
43、rength by pull off according to EN 1542 greater than 3 N/mm2. DIN EN 1766:2017-05 EN 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
44、/mm2for cubes and (40 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
45、strength measured according 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
46、.1.1 Type MC (0,40) 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
47、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 requirements are usually met by a concrete with a
48、 compressive strength 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
49、1542 greater than 2,5 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 requirements are usually met by a concrete with a compressive strength which satisfies class C 40/50, as specified in EN 206
