BSIS0 20290-2:2019 BSl Standards Publication Aggregates for concrete Test methods for mechanical and physical properties Part 2: Method for determination of resistance to fragmentation by Los Angeles Test (LA-Test) bsi. BSISO20290-2:2019 BRITISH STANDARD Nationalforeword This British Standard is theUK implementation of IS020290-2:2019. The UK participation in its preparation was entrusted to Technical Committee B/517/1, Concrete production and testing. A list of organizations represented on this committee can be obtained on requestto its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. TheBritishStandardsInstitution2019 PublishedbyBSI StandardsLimited2019 ISBN9780580998829 ICS91.100.30 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the StandardsPolicyandStrategyCommitteeon30November2019. Amendments/corrigendaissuedsincepublication Date Textaffected BSIS020290-2:2019 INTERNATIONAL ISO STANDARD 20290-2 First edition 2019-11 Aggregates for concrete Test methods for mechanical and physical properties - Part 2: Method for determination of resistance to fragmentation by Los Angeles Test (LA-Test) Granulats pour beton-Methodes d'essai relatives aux proprietes mécaniquesetphysiques- Partie 2: Partie 2: Methode de determination de la resistance d la fragmentation parI'essai LosAngeles Reference number ISO 20290-2:2019(E) ISO @IS0 2019 BSIS020290-2:2019 IS020290-2:2019(E) COPYRIGHTPROTECTEDDOCUMENT IS02019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or IsO's member body in the country of the requester: ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii ISO 2019-Allrights reserved BSIS0 20290-2:2019 IS020290-2:2019(E) Contents Page Foreword iv 1 Scope 1 2 Normative references. .1 3 Terms and definitions. .1 4 Sampling. .2 5 Apparatus. .2 6 Determinationof resistancetofragmentationbythe Los Angelestestmethod .3 6.1 Principle 3 6.2 Preparation of test portion. 3 6.3 Test procedure. 4 6.4 Calculationandexpression of results. 4 6.5 Test report. 4 Annex A (normative) Determination of the resistance to fragmentation of aggregates for larger size aggregates. 5 AnnexB (normative)Alternative narrowrangeclassifications fortheLos Angelestest 6 @ IS0 2019 - All rights reserved iii BSIS020290-2:2019 IS020290-2:2019(E) Foreword Iso (the International Organizationfor Standardization)is a worldwidefederation of national standards bodies (Iso member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations,governmental and non-governmental,inliaison with Iso, also takepart in the work ISo collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in theIso/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of Iso documents should be noted. This document was drafted in accordance with the editorial rules of the ISo/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this