《BS-5328-4-1990.pdf》由会员分享，可在线阅读，更多相关《BS-5328-4-1990.pdf（12页珍藏版）》请在三一文库上搜索。
1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 5328 : Part 4 : 1990 I
2、ncorporating Amendments Nos. 1, 2 and 4 and Corrigendum 1 not issued separately and implementing Amendment No. 3, not published separately ICS 91.100.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Concrete Part 4. Specification for the procedures to be used in sampling, te
3、sting and assessing compliance of concrete Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Cement, Gypsum, Aggregates and Quarry Products Standards Policy Committee, was
4、published under the authority of the Board of BSI and comes into effect on 30 November 1990 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference CAB/4 Draft for comment 87/13759 DC ISBN 0 580 18980 5 BS 5328 : Part 4 : 1990 Amendments issued since publica
5、tion Amd. No.DateText affected 6928November 1991 8760September 1995 9313March 1997 10367May 1999 10611July 1999Indicated by a sideline in the margin Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Cement, Gypsum, Aggregates and Quarry Pr
6、oducts Standards Policy Committee (CAB/-) to Technical Committee CAB/4, upon which the following bodies were represented: Association of Lightweight Aggregate Manufacturers Association of Metropolitan Authorities Association of Quality Pulverised Fuel Ash Suppliers British Aggregate Construction Mat
7、erials Industries British Cement Association British Civil Engineering Test Equipment Manufacturers Association British Precast Concrete Federation British Ready Mixed Concrete Association Building Employers Confederation Cement Admixtures Association Cementitious Slag Makers Association Concrete So
8、ciety County Surveyors Society Department of the Environment (Building Research Establishment) Department of the Environment (Property Services Agency) Department of Transport Department of Transport (Transport and Road Research Laboratory) Electricity Association Federation of Civil Engineering Con
9、tractors Institute of Concrete Technology Institution of Civil Engineers Institution of Highways and Transportation Institution of Structural Engineers Institution of Water and Environmental Management Royal Institution of Chartered Surveyors Sand and Gravel Association Society of Chemical Industry
10、Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5328 : Part 4 : 1990 BSI 07-19991 Contents Page Committees responsibleInside front cover Foreword2 Specification 0Introduction4 1Scope4 2Definitions4 3Sampling and testing4 Table 1Characteri
11、stic compressive strength compliance requirements8 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 BSI 07-1999 BS 5328 : Part 4 : 1990 Foreword This Part of BS 5328 has been prepared under the direction of the Cement, Gypsum, Aggregates an
12、d Quarry Products Standards Policy Committee. This Part, together with BS 5328 : Parts 1, 2 and 3, is a revision of BS 5328 : 1981, which is withdrawn, and forms a comprehensive standard for the specification of concrete to which codes of practice and contractual documents can refer. It includes rec
13、ommendations originating from, and complementing clauses in, BS 8110 : Part 1. As this standard involves selection by the specifier from a number of options and, in certain instances, agreement on requirements between the purchaser and producer, any requirement for compliance with BS 5328 or any cla
14、im 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 into the construction. The standard is now in four Parts: Part 1.Guide
15、to specifying concrete Part 2.Methods for specifying concrete mixes Part 3.Specification for the procedures to be used in producing and transporting concrete Part 4.Specification for the procedures to be used in sampling, testing and assessing compliance of concrete Part 1 provides guidance to the s
16、pecifier 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 producer. Part 3 specifies for the producer the procedures to be used in producing and transpor
17、ting the concrete. Part 4 specifies the procedures to be used by the purchaser in sampling, testing and assessing concrete for compliance. This standard provides methods for specifying concrete mixed on site or in a precast concrete factory and for the purchase and supply of ready-mixed concrete. It
18、 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 specify the concrete required. The purchaser is responsible for passing on
19、 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 relation to both sets of requirements. There may be occasions where it is adva
20、ntageous 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. Precautions need to be taken when working with cement and wet concrete and attention is
21、drawn to these in BS 5328 : Parts 3 and 4. This standard covers concrete produced by normal methods, but it does not apply to precast concrete products where British Standard specifications contain the specification of the concrete. Many of the requirements of the standard, e.g. the use of materials
22、 and the control of production, apply equally to precast concrete and to in situ concrete. However, some of its requirements concerning the responsibilities of the purchaser and producer may not apply in the case of precast concrete. The specification of designated mixes is unlikely to be appropriat
23、e for factory produced precast concrete products. Amendment number 4 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 the
24、se recommendations. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 07-19993 BS 5328 : Part 4 : 1990 | | | | | | | It is necessary for the purchaser to take into account the requirements of specialized codes of practice and any influence
25、s of the construction process. Provisions are made in this standard for the inclusion of any special requirements. A British standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a Br
26、itish Standard does not of itself confer immunity from legal obligations. This corrigendum is issued to correct the error on pages 5, 7 and 8 in AMD 10367, issued in May 1999, as follows: on page 5, in 3.7.1 c), the date should have been 1997 not 1990; on page 7, in 3.13.1 c) and 3.14.1, the date sh
27、ould have been 1997 not 1990; on page 8, in the Note to 3.16.2 b), the second sentence should have read Advice on the action to be taken in the event of such non-compliance is given in clause 10 of BS 5328 : Part 1 : 1997. Summary of pages This document comprises a front cover, an inside front cover
28、, pages 1 to 8, an inside back cover and a back cover. The BSI copyright notice displayed throughout this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 BSI 07-1999 BS 5328 : Part 4 :
29、1990 Specification 0 Introduction This Part of BS 5328 describes methods of sampling and testing of concrete, which have been specified in accordance with BS 5328 : Part 2, and defines, for both purchaser and producer, the compliance limits for the various tests that may be specified. As an alternat
30、ive to assessing compliance with cement content or water/cement ratio requirements by analysis, or observation of the batching, equivalent strength grades are now given for which the strength compliance is deemed to satisfy a given minimum cement content and/or maximum free water/cement ratio. Modif
31、ications have been made to the strength compliance requirements. The validity of the testing is now checked by applying a limit to the range of the two strength determinations, the mean of which constitutes the test result. For compressive strengths, requirements are given for the first two results
32、and the first three results. The use of superplasticizers to produce flowing concrete is accommodated by the inclusion of flow table compliance values. Sampling and testing of concrete for compliance should be specified to be carried out by organizations accredited by the National Measurement Accred
33、itation Service (NAMAS) for the relevant test. 1 Scope This Part of BS 5328 specifies the procedures to be followed when assessing the quality of concrete for compliance with a specification prepared in accordance with BS 5328 : Part 2. NOTE. The titles of the publications referred to in this standa
34、rd are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS 5328 the definitions given in BS 5328 : Part 1 and BS 6100 apply. 3 Sampling and testing 3.1 General All sampling and testing of the constituent materials shall be carried out in accordance with the appropriate
35、 British Standard. All sampling, curing and testing of the concrete, fresh or hardened, shall be carried out in accordance with the relevant Parts of BS 1881 unless stated otherwise in this Part of BS 5328. Caution. When cement is mixed with water, alkali is released. Take precautions to avoid dry c
36、ement entering the eyes, mouth and nose when mixing cement or concrete by wearing suitable protective clothing. If cement or concrete enters the eye, immediately wash it out thoroughly with clean water and seek medical treatment without delay. Wash wet concrete off the skin immediately. When samplin
37、g and testing for compliance are required to be quality assured, evidence of certification and any change in certification shall be provided on request. The producer shall be afforded all reasonable opportunity and facility to inspect the sampling and testing regime employed by the purchaser. 3.2 Po
38、int and time of sampling For the assessment of compliance of ready-mixed concrete, the point and time of sampling shall be at discharge from the producers delivery vehicle or from the mixer when delivered into the purchasers vehicle. For the assessment of compliance of concrete supplied to the const
39、ruction, the point and time of sampling shall be at delivery into the construction, unless agreed otherwise. NOTE. Samples taken for assessing ready-mixed concrete may be used also for assessing compliance of concrete as supplied to the construction when either: (a) concrete is discharged from the p
40、roducers vehicle directly into the construction; or (b) effects due to time delays, ambient conditions, transport and handling between discharge from the producers vehicle and delivery into the construction are agreed to be minimal; or (c) adjustments to specified values have been agreed to take acc
41、ount of significant effects as under item (b). Such adjustments may be nominal or based on trials. Similarly, samples taken at the point of production of concrete, whether ready-mixed, site mixed or factory precast, may be used to assess concrete supplied to the construction. When concrete is sample
42、d for compliance tests at the point of delivery into the construction, the purchaser shall ensure that the sampling is spread representatively within a single identified batch as produced, in accordance with BS 1881 : Part 101. 3.3 Compliance with concrete properties and mix proportions When propert
43、ies other than those mentioned in BS 5328 : Part 2 are specified (for example thermal conductivity or modulus of elasticity of concrete), the method of test, the compliance requirements and tolerances shall be specified or agreed in advance between the purchaser and producer. 3.4 Temperature of fres
44、h concrete When required, the temperature of the fresh concrete shall be measured in one of the following ways. a) Within 2 min of taking the sample at delivery insert a type A 100 mm immersion thermometer having a range of 25 8C to +110 8C, graduated at each 1 8C and complying with BS 1704, in the
45、sample to a depth of at least 100 mm. When steady conditions have been maintained for 1 min record the temperature to the nearest 1 8C. b) Use an alternative form of temperature measurement which provides the same accuracy as given in item (a). The measured concrete temperature shall not exceed any
46、specified maximum value or fall below any specified minimum value. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:22:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 07-19995 BS 5328 : Part 4 : 1990 3.5 Workability The workability shall be within the following limits on the specified val
47、ue as appropriate. Slump (i) When sampled in accordance with BS 1881 : Part 101 25 mm or of the specified value, whichever is the greater. (ii) When sampled in accordance with BS 1881 : Part 102 Specified value Tolerance 10 mm+35 mm 210 mm 25 mm+35 mm 225 mm 50 mm 35 75 mm and over ( specified slump
48、) + 10 mm Limits for intermediate slumps shall be derived by interpolation. Vebe time3 s or of the specified 1 5 value, whichever is the greater Compacting factor 0.03, where specified value is 0.90 or greater. 0.04, where specified value is less than 0.90 but more than 0.80. 0.05, where specified v
49、alue is 0.80 or less. FlowSpecified value50 mm 3.6 Air content of fresh concrete The total air content determined from individual samples of concrete taken at the point of delivery into the construction and representative of any given batch of concrete shall be the specified total value 2.0 %. The mean total air content from any four consecutive determinations from separate batches shall be the specified value1.5 %. NOTE 1. Total air content comprises entrained air plus entrapped air remaining after compaction. NOTE 2. In certain forms of construction