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1、BRITISH STANDARD BS 5328: Part 2:1997 Incorporating Amendments Nos. 1, 2 and 3 and Corrigendum No. 1 not issued separately Concrete Part 2: Methods for specifying concrete mixes ICS 91.100.30 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
2、 BS 5328-2:1997 This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 March 1997 BSI 10 September 2002 The following BSI references relate to the wor
3、k on this standard: Committee reference B/517 Draft for comment 95/107687 DC ISBN 0 580 26723 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee B/517, Concrete, upon which the following bodies were represented: British Ag
4、gregate Construction Materials Industries British Cement Association British Precast Concrete Federation Ltd. British Ready Mixed Concrete Association Building Employers Confederation Cement Admixtures Association Department of Transport (Highways Agency) Federation of Civil Engineering Contractors
5、Federation of Resin Formulators and Applicators (Ferfa) Institute of Concrete Technology National House-Building Council Sand and Gravel Association Limited Society of Chemical Industry The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Asso
6、ciation of Lightweight Aggregate Manufacturers British Civil Engineering Test Equipment Manufacturers Association Cementitious Slag Makers Association Chartered Institution of Water and Environmental Management Concrete Society County Surveyors Society Department of the Environment (Building Researc
7、h Establishment) Electricity Association Federation of Piling Specialists Institution of Structural Engineers Quality Ash Association Amendments issued since publication Amd. No.DateText affected 9691October 1997 10365May 1999 10612July 1999 1387710 September 2002Indicated by a sideline Licensed Cop
8、y: sheffieldun sheffieldun, na, Mon Dec 04 16:22:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5328-2:1997 BSI 10 September 2002 i Contents Page Committees responsibleInside front cover Forewordii Section 1. General1 Introduction1 1.1Scope1 1.2References1 1.3Definitions2 Section 2. Designed mixes
9、5 2.1Designed mix5 2.2Selection of grade and materials5 2.3Mix specification5 Section 3. Prescribed mixes7 3.1Prescribed mix7 3.2Selection of materials and mix proportions7 3.3Mix specification7 Section 4. Standard mixes9 4.1Standard mix9 4.2Selection of mix and materials9 4.3Constituent materials9
10、4.4Mix specification9 Section 5. Designated mixes13 5.1Designated mix13 5.2Selection of materials13 5.3Method of specifying13 5.4Permitted materials16 5.5Concrete mix requirements17 5.6Conformity19 5.7Documentation19 Annex A (informative) Forms for specifying or scheduling concrete mixes in accordan
11、ce with BS 532819 Table 0A Limiting values of cement or combination contents (kg/m3) for not more than 0.20 kg Na2O eq/m3 of concrete from other constituents3 Table 0B Limiting values of cement or combination contents (kg/m3) for 0.60 kg Na2O eq/m3 of concrete from other constituents4 Table 1 Compre
12、ssive strength grades6 Table 2 Flexural strength grades6 Table 3 Standard mixes and related strengths9 Table 4 Materials for use in standard mixes10 Table 5 Mix proportions for standard mixes11 Table 6 Requirements for designated mixes15 Table 7 Adjustments to minimum cement contents for aggregates
13、other that those of 20 mm nominal maximum size18 Table 8 Limits of chloride content of concrete18 List of references (see clause 1.2)24 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5328-2:1997 ii BSI 10 September 2002 Foreword This Par
14、t of BS 5328 has been prepared by Technical Committee B/517. This Part, which includes designated mixes, is a new edition of BS 5328-2:1991, which is withdrawn, and, together with BS 5328-1, BS 5328-3 and BS 5328-4, forms a comprehensive standard for the specification of concrete to which codes of p
15、ractice and contractual documents can refer. It includes recommendations originating from BS 8110-1. This edition introduces technical changes but does not reflect a full review or revision of the standard. This edition makes provision for Portland limestone cement conforming to BS 7583. Amendment n
16、umber 2 takes account of the recent consensus reached by experts on provisions to resist damaging ASR in the UK. These recommendations are published in BRE Digest 330:1999. The technical content of this amendment has been derived from these recommendations. Amendment number 3 takes account of the gu
17、idance in BRE Special Digest 1:Part 2 4. BS 5328 is due to be withdrawn in December 2003 and consequently BSI have decided not to revise this standard to reflect the new cement descriptions given in BS EN 197-1. Where traditional cements are specified the producer may use the equivalent BS EN 197-1,
18、 Cements Composition, specifications and conformity criteria for common cements, see national annex NA to BS EN 197-1:2000 for guidance on equivalents. As this standard involves selection by the specifier from a number of options and, in certain instances, agreement on requirements between the purch
19、aser and producer, any requirement for conformity to BS 5328 or any claim of compliance with it has to be qualified by reference to the selection and to any such agreements. This standard covers the methods for specifying and producing concrete as a construction material up to the point of delivery
20、into the construction. The standard is in four Parts: Part 1 provides guidance, to the specifier and purchaser of concrete, on the selection of requirements for materials and concrete mixes. Part 2 provides a choice of methods by which the purchaser can convey the selected requirements to the produc
21、er. Part 3 specifies for the producer the procedures to be used in producing and transporting the concrete. Part 4 specifies the procedures to be used in sampling, testing and assessing concrete for conformity. This standard provides methods for specifying concrete mixed on site or in a precast conc
22、rete factory and for the purchase and supply of ready-mixed concrete. It takes account of the distinct and different responsibilities of the purchaser and the producer. There are a number of instances in which the purchaser has to select from the various options given in this standard in order to sp
23、ecify the concrete required. The purchaser is responsible for passing on to the producer the requirements of the specifying body, e.g. the engineers or architects specification, together with any additional requirements. Throughout this standard the terms specify and specification are used in relati
24、on to both sets of requirements. There may be occasions where it is advantageous for economic or technical reasons to propose changes to the specification. In such cases the producer and purchaser should agree the proposed amendments for approval and sanction by the specifying body. Part 1Guide to s
25、pecifying concrete; Part 2Methods for specifying concrete mixes; Part 3Specification for the procedures to be used in producing and transporting concrete; Part 4Specification for the procedures to be used in sampling, testing and assessing compliance of concrete. Licensed Copy: sheffieldun sheffield
26、un, na, Mon Dec 04 16:22:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5328-2:1997 BSI 10 September 2002 iii Precautions need to be taken when working with cement and fresh concrete and attention is drawn to these in BS 5328-3 and BS 5328-4. This standard covers concrete produced by normal method
27、s, but it does not apply to precast concrete products where the concrete is specified in other British Standards. Many of the requirements of this standard, e.g. the use of materials and the control of production, apply equally to precast concrete and to in situ concrete. However, some of the requir
28、ements concerning the responsibilities of the purchaser and the producer may not apply in the case of precast concrete. The specification of designated mixes is unlikely to be appropriate for factory produced precast concrete products. It is necessary for the purchaser to take into account the requi
29、rements of specialized codes of practice and any influences of the construction process. Provisions are made in this standard for the inclusion of any special requirements. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct
30、application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This Corrigendum is issued to correct the error on page 14 in AMD 10365, issued in May 1999, where “Minimum” in Item 8 of Form A should have been “Maximum”. Summary of pages This document compr
31、ises a front cover, an inside front cover, pages i to iv, pages 1 to 25 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment. Licensed Copy: sheffieldun sheffieldu
32、n, na, Mon Dec 04 16:22:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5328-2:1997 BSI 10 September 2002 1 Section 1. General Introduction This Part of BS 5328 gives the methods to b
33、e used by the purchaser for specifying concrete. The standard is in five sections: Section 5 gives a new method of specifying concrete, the designated mix. This method of specification is primarily aimed at in situ concrete applications and it is unlikely to be applicable to factory produced precast
34、 concrete products. The purchaser specifies a mix designation appropriate to the end use and this is an instruction to the producer to comply with the specification given in section 5. There is also a requirement that the producer holds current conformity certification based on product testing and s
35、urveillance coupled with approval of the producers quality system to BS EN ISO 9001 by a certification body accredited by the Secretary of State (or equivalent) for the relevant areas of product and systems conformity certification, as this is the prime means of controlling conformity. The methods,
36、involving use of relevant information from BS 5328:Part 1:1997, enable the purchaser to specify clearly to the producer the requisite properties of the concrete. Ordinary prescribed mixes are now described as standard mixes using the prefix ST to avoid confusion with the grade designation of designe
37、d mixes. Standard mixes of 14 mm maximum size aggregate have been omitted as they are rarely used. Annex A contains forms which may be used to specify either designed, prescribed, standard or designated mixes. The use of these forms should ensure that the purchaser specifies all necessary requiremen
38、ts and that the producer is in possession of all the relevant technical data. Methods of assessing conformity to specifications for concrete mixes drawn up in accordance with this Part of BS 5328 are given in BS 5328:Part 4:1990. Purchasers ordering in accordance with this standard are advised to sp
39、ecify quality assurance requirements for materials or for concrete in their purchasing contracts to assure themselves that products specified in accordance with BS 5328 consistently achieve the required level of quality. Purchasers of ready-mixed concrete are advised to specify certification meeting
40、 the requirements of the United Kingdom Accreditation Service, National Accreditation of Certification Bodies, for product conformity. They are similarly advised to specify that, where they are available, constituent materials should be obtained from suppliers operating quality systems in accordance
41、 with BS EN ISO 9000. 1.1 Scope This Part of BS 5328 gives methods for specifying concrete. It does not apply when the concrete is specified as being in accordance with another British Standard. 1.2 References 1.2.1 Normative references This Part of BS 5328 incorporates, by dated or undated referenc
42、e, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on page 23. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this Pa
43、rt of BS 5328 only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 1.2.2 Informative references This Part of BS 5328 refers to other publications that provide information or guidan
44、ce. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. Section 1General; Section 2Designed mixes; Section 3Prescribed mixes; Section 4Standard mixes; Section 5Designated mixes. License
45、d Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5328-2:1997 2 BSI 10 September 2002 Section 1. 1.3 Definitions For the purposes of this Part of BS 5328 the definitions given in BS 5328:Part 1 and BS 6100 apply. 1.4 Minimizing the risk of damagin
46、g alkali-silica reaction 1.4.1 General Unless otherwise agreed with the purchaser, the producer shall minimize the risk of damaging alkali-silica reaction in accordance with one of the sets of requirements given in 1.4.2, 1.4.3, 1.4.4, 1.4.5, 1.4.6 and 1.4.7. 1.4.2 Low reactivity aggregate, option 1
47、 No action is required if the following six conditions are satisfied: a) the aggregate type or aggregate combination is classed as low reactivity by BRE Digest 3301; b) the cement or combination content is ?550 kg/m3 of concrete; c) the declared mean alkali content of the Portland cement or the Port
48、land cement type component of other cements and combinations is ?0.75 % Na2O eq; d) the alkali from constituents other than the cement or combination ?0.60 kg Na2O eq/m3 of concrete; e) the guaranteed alkali limit of any ggbs is ?1.0 % Na2O eq and the guaranteed alkali limit of any pfa is ?5.0 % Na2
49、O eq; f) the concrete does not contain pfa other than that conforming to BS 3892-1. NOTESee 3.8.1 of BS 5328-4:1990 for the calculation of equivalent alkali content. 1.4.3 Low reactivity aggregate, option 2 No action is required if the following six conditions are satisfied: a) the aggregate type or aggregate combination is classed as low reactivity by BRE Digest 330; b) the cement or combination content is ?500 kg/m3 of concrete; c) the declared mean alkali content o