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首页标准规范国家标准BS 5328-2-1997 Concrete. Methods for specifying concrete mixes
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BS 5328-2-1997 Concrete. Methods for specifying concrete mixes

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BS 5328-2-1997 Concrete. Methods for specifying concrete mixes
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ConcretePart 2.Methods for specifyingconcrete mixes1CS91.100.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWSection 1.GeneralIntroductionPurchasers ordering in accordance with this standardThis Part of BS 5328 gives the methods to be used byare advised to specify quality assurance requirementsthe purchaser for specifying concrete.The standard isfor materials or for concrete in their purchasingcontracts to assure themselves that products specifiedin five sections:in accordance with BS 5328 consistently achieve therequired level of quality.Purchasers of ready-mixedsection 1 General;concrete are advised to specify certification meetingsection 2 Designed mixes;the requirements of the United Kingdom Accreditationsection 3 Prescribed mixes;Service,National Accreditation of Certification Bodies,section 4 Standard mixes;for product conformity.They are similarly advised tospecify that,where they are available,constituentmaterials should be obtained from suppliers operatingquality systems in accordance with BS EN ISO 9000.Section 5 gives a new method of specifying concrete,the designated mix.This method of specification isprimarily aimed at in situ concrete applications and it1.1 Scopeis unlikely to be applicable to factory produced precastThis Part of BS 5328 gives methods for specifyingconcrete products.The purchaser specifies a mixconcrete.It does not apply when the concrete isdesignation appropriate to the end use and this is anspecified as being in accordance with another Britishinstruction to the producer to comply with theStandard.requirement that the producer holds current1.2 Referencesconformity certification based on product testing andsurveillance coupled with approval of the producer's1.2.1 Normative referencesquality system to BS EN ISO 9001 by a certificationThis Part of BS 5328 incorporates,by dated or undatedbody accredited by the Secretary of State (orreference,provisions from other publications.Theseequivalent)for the relevant areas of product andsystems conformity certification,as this is the primenormative references are made at the appropriateplaces in the text and the cited publications are listedmeans of controlling conformity.on the inside back cover.For dated references,onlyThe methods,involving use of relevant informationthe edition cited applies;any subsequent amendmentsfrom BS 5328 Part 1:1997,enable the purchaser toto or revisions of the cited publication apply to thisspecify clearly to the producer the requisite propertiesPart of BS 5328 only when incorporated in theof the concrete.Ordinary prescribed mixes are nowreference by amendment or revision.For undateddescribed as standard mixes using the prefix ST toreferences,the latest edition of the cited publicationavoid confusion with the grade designation of designedapplies,together with any amendments.mixes.Standard mixes of 14 mm maximum sizeaggregate have been omitted as they are rarely used.1.2.2 Informative referencesAnnex A contains forms which may be used to specifyThis Part of BS 5328 refers to other publications thateither designed,prescribed,standard or designatedprovide information or guidance.Editions of thesemixes.The use of these forms should ensure that thepublications current at the time of issue of thispurchaser specifies all necessary requirements and thatstandard are listed on the inside back cover,butthe producer is in possession of all the relevantreference should be made to the latest editions.technical data1.3 Definitionsconcrete mixes drawn up in accordance with this PartFor the purposes of this Part of BS 5328 the definitionsof BS 5328 are given in BS 5328 Part 4:1990.given in BS 5328:Part 1 and BS 6100 apply.
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