EN 933-7-1998 en Tests for Geometrical Properties of Aggregates - Part 7 Determination of Shell Content - Percentage of Shells in Coarse Aggregates《集料的几何性能试验 第7部分 壳含量测定 粗集料中壳的百分率》.pdf

《EN 933-7-1998 en Tests for Geometrical Properties of Aggregates - Part 7 Determination of Shell Content - Percentage of Shells in Coarse Aggregates《集料的几何性能试验 第7部分 壳含量测定 粗集料中壳的百分率》.pdf》由会员分享，可在线阅读，更多相关《EN 933-7-1998 en Tests for Geometrical Properties of Aggregates - Part 7 Determination of Shell Content - Percentage of Shells in Coarse Aggregates《集料的几何性能试验 第7部分 壳含量测定 粗集料中壳的百分率》.pdf（8页珍藏版）》请在麦多课文档分享上搜索。

1、STD-BSI BS EN 933-7-ENGL 3998 m 3b24bb9 0732297 485 m BRITISH STANDARD Tests for geometrical properties of aggregates - Part 7: Determination of shell content - Percentage of shells in coarse aggregates The European Standard EN 933-71998 has the status of a British Standard ICs 91 D0.20 BS EN 933-7:

2、1998 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW COPYRIGHT European Committee for StandardizationLicensed by Information Handling Services- BS EN 933-7:1998 Amd. No. National foreword Date Text affected This British Standard is the English ianguage version of EN 9337:1998.

3、 It supersedes BS 812-106:1985 which, it is intended, will be withdrawn on 199912-01 if ali the European Standards included in the package are available. The UK participation in its preparation was entrusted by Technical Committee BJ502, Aggregates, to Subcommitke WZ6, Test methods, which has the re

4、sponsibility to: - aid enquirers to undersand the text; - present to the responsible European committee any enquiries on the - monitor related internaiionai and European developments and promulgate interpretation, or proposals for change, and keep the K interests informed, them in the UK. A list of

5、organkdions represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Internationai S

6、tandards Correspondence Index”, or by using the ”Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include ali the necessary provisions of a contract. Users of British Standards are responsible for their correct appidon. Compliance with a British Standa

7、rd does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN titie page, pages 2 to 5 and a back cover. This British Standard, having been prepared under the direction of the Sector Board for Buiiding and Civil En

8、gineering, was published under the authority of the Standards Board and comes into effect on 16 July 1998 Q BSI 1998 ISBN O pis0 29780 2 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesSTD-BSI BS EN 933-7-ENGL 3998 = 1624669 0732299 258 EUROPEAN sTANDAR6) NOR

9、lME EUR0PEE”E EUROP- NORM EN 933-7 March 1998 ICs 91.100.20 Descriptors: Aggregates, tests, geometrical characteristics, determination, percentage, gravel English version Tests for geometrical properties of -gates - Part 7: Detemination of shell content - Percentage of shells in coarse aggregates Es

10、sais pour dterminer les proprits gomtxiques des gran is the mass of the shells and shell fragments, in grams- Record the value of SC to the nearest whole number. 8.2 Test portions where D 2 d 8.2.1 Size fractions not reduced If no size fractions have been reduced calculate the shell content in accor

11、dance with the following equation: where: Mli is the sum of the masses in the size fractions testeclingramS. fhgments in each of the size fractions tested, in grams. C Mzi is the sum of the 111i1sses of shells and shell Record the value of SC to the nearest whole number. 8.2.2 Reduced size fiations

12、If any size fractions have been reduced calculate the percentages by mas of shells and shell i-agments in each particle size fraction and record as SCi. Calculate the weighted mean percentage value of the shells and sheil fragments in accordance with the following equation: where: Vi is the percenta

13、ge by mass of particle size Won i in the sample tested; SCi is the percentage by mass of shells and shell hgments in particle size fraction i. Record the weighted mean percentage of shells and she1 fragments to the nearest whole number. O BSI 1998 COPYRIGHT European Committee for StandardizationLice

14、nsed by Information Handling Services9 hst report 9.1 Required data The test report shall include the following information: a) reference to this European Standar b) identification of the sample; c) identification of the laboratory; d) sample reception date; e) shell content SC, to the nearest whole

15、 number, f) where applicable, the weighted mean percentage. EN 9337 Identification of the sample: Page 6 EN 933-E1998 Laboratory: Date: Operator: 9.2 Optionai data The test report may include the information: a) name and location of the sample source; b) description of the material and of the sample

16、 reduction procedure; c) visual description of shells (e.g., hollow or lat); d) mass of sample MO; e) mass of test portion MI; f) mass of shells and fragments M2; g) any size fraction consisting of less than 100 particles; h) sampling certificate, if available; i) date of test. Particle size fractio

17、n dDi Mass Mi Mass M, where Di I 2 4 mm ! g Shell content SC (to the nearest whole number) % = (MdMl) x 100 O BSI 1998 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesBS EN 933-71998 BSI 383 Chiswick High Road London w4 4AL BSI - British Standards Institution

18、 BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should m

19、ake sure that they possess the latest amendments or eclitions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this Brish Standard would inform the Secretary of the technical committee re

20、sponsible, the identity of which can be found on the inside front cover, Tel 0181 996 9000. Fax: 0181 996 7400. BSI offers members an individual updating senrice called PLUS which ensures that subscribers automatically receive the latest editions of sanhds. Buying standards Orders for all BSI, inter

21、nationai and foreign standards publications should be addressed to Customer Services. Tel: 0181 996 7000. Fax 0181 996 7001. In response to orders for internationai standards, it is BI policy to supply the BSI implementation of those that have been published as British Standards, uniess otherwise re

22、quested. Information on standards BSI provides a wide range of information on nationai, European and international standards through its Libmy and its Technid Help to Exportem Service. Various BSI electronic information services are also available which give dew on aii its products and Services. Con

23、tact the Information Centre. Tel 0181 996 7111. Fax: 0181 996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Adminishation. Tek 0181 996

24、7002. Fax O181 996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardbtion bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retri

25、eval system or transmitted in any form or by any means - electronic, photocopying, recording or otherwise - without prior written permission from BSI. This does not preclude the free use, in the couse of implemenlhg the standard, of necessary details such as symbols, and size, type or grade designat

26、ions. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel 0181 996 7070. COPYRIGHT European Committee for StandardizationLicensed by Information Handling Services