BS-63-2-1987.pdf
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1、BRITISH STANDARD BS 63-2:1987 Road aggregates Part 2: Specification for single-sized aggregate for surface dressing UDC 625.07 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 07 02:36:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 63-2:1987 This British Standard,
2、 having been prepared under the direction of the Road Engineering Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 October 1987 BSI 12-1998 First published as BS 63-2:1971 First revision as BS 63-2, incorporating BS 1984:1967, October 1987 The fo
3、llowing BSI references relate to the work on this standard: Committee reference RDB/1 Draft for comment 85/13854 DC ISBN 0 580 15674 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Road Engineering Standards Committee (RDB/-) to Techni
4、cal Committee RDB/1, upon which the following bodies were represented: British Aggregate Construction Materials Industries British Tar Industry Association County Surveyors Society Department of Transport (Highways) Federation of Manufacturers of Construction Equipment and Cranes Greater London Coun
5、cil Institution of Highways and Transportation Natural Environment Research Council (Institute of Geological Science) Road Emulsion Association Ltd. Road Surface Dressing Association Sand and Gravel Association Limited Society of Chemical Industry Amendments issued since publication Amd. No.Date of
6、issueComments Licensed Copy: London South Bank University, London South Bank University, Thu Dec 07 02:36:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 63-2:1987 BSI 12-1998i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Specified size1 4Sampling and tes
7、ting1 5Grading and flakiness index limits2 6Strength2 Table 1 Specified sizes for given nominal sizes1 Table 2 Grading limits, specified size and maximum flakiness index for surface dressing aggregates1 Table 3 Grading limits, specified size and maximum flakiness index for surface dressing aggregate
8、s for lightly trafficked roads2 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Thu Dec 07 02:36:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 63-2:1987 ii BSI 12-1998 Foreword This British Standard has been prepared under the a
9、uthority of the Road Engineering Standards Committee and is a revision as one standard in two Parts of the two standards BS 63-2:19711) and BS 1984:19672) both of which are now withdrawn. For ease of use the number BS 63 is being retained. BS 63-1:19511) is withdrawn. The two Parts are: Part 1: Spec
10、ification for single-sized aggregate for general purposes; Part 2: Specification for single-sized aggregate for surface dressing. Particle size distribution is presented as a continuous grading with specified limits on percentages of material passing selected sieve sizes in order to unify the specif
11、ication of aggregates with other British Standards, e.g. BS 594 and BS 4987. Requirements for aggregate soundness and the determination of the clay content of fine aggregates are not included in this revision because suitable test methods are not available, though the sedimentation test described in
12、 BS 812-1 may offer some guidance in terms of particle size distribution. Reference should be made to BS 812-101 for general guidance on testing aggregates, precision of test methods and variance arising from sampling errors. For lightly trafficked roads some authorities may consider aggregates in a
13、ccordance with BS 63-1 to be adequate for use as surface dressing; production of surface dressing aggregates will usually involve washing of the aggregate after screening. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respon
14、sible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. This standard has be
15、en updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) BS 63 Single-sized roadstone and chippings BS 63-1:1951 Imperial units BS 63-2:1971 Metric units 2) BS 1984:1967 Gravel aggregates for surface treatme
16、nt (including surface dressings) on roads. Licensed Copy: London South Bank University, London South Bank University, Thu Dec 07 02:36:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 63-2:1987 BSI 12-19981 1 Scope This Part of BS 63 specifies grading, flakiness index and strength for nominally sing
17、le-sized aggregates, i.e. aggregates containing a major proportion of single-sized particles, for use in surface dressing. NOTEThe titles of the publications referred to in this standard are listed on the inside back page. 2 Definitions For the purposes of this Part of BS 63 the following definition
18、s apply. 2.1 specified size the single size which forms the major proportion of the single-sized aggregate NOTESee clause 3. 2.2 nominal size the name given to a particular size of aggregate NOTE 1Usually this is the smallest size of test sieve in accordance with BS 410 through which at least 85 % o
19、f the aggregate passes, but where the appropriate test sieve size is not a whole number the nominal size is given as the whole number nearest to that size of test sieve. NOTE 2See Table 1. 3 Specified size 3.1 The specified sizes for given nominal sizes shall be as given in Table 1. Table 1 Specifie
20、d sizes for given nominal sizes 3.2 The percentage aggregate of specified size shall be not less than that given in Table 2 b) and Table 3 b). Table 2 Grading limits, specified size and maximum flakiness index for surface dressing aggregates 4 Sampling and testing 4.1 Sampling shall be carried out i
21、n accordance with the methods specified in BS 812-102. NOTEIt is recommended that sampling be carried out as soon as possible after delivery because of the risk of contamination to aggregates when stockpiled. 4.2 The grading of the aggregate shall be determined in accordance with BS 812-103 using th
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