ISO INTERNATIONAL STANDARD 18650-2 Secondedition 2014-09-15 Building construction machinery and equipment - Concrete mixers - Part 2: Procedure for examination of mixing efficiency Machines et matériels pour la construction des batiments - Malaxeurs de béton Partie 2: Mode opératoire pour la determination de I'efficacité de malaxage Reference number ISO 18650-2:2014(E) LSO @ IS0 2014 I without license from IHS Not for Resale IS0 18650-2:2014(E) COPYRIGHTPROTECTEDDOCUMENT ISO2014 All rights reserved. Unless otherwise specified, 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 Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 18650-2:2014(E) Contents Page Foreword ..iv Introduction. 1 Scope.. 2 Normative references 3 Terms and definitions 4 Requirements for mixer verified .1 5 Mixing performance test .2 5.1 General .2 5.2 Concrete mix preparation .3 5.3 Sampling. .3 5.4 Variance tests ..9 6 Evaluation of test results. .13 7 Test report. ..13 8 Final remarks. ..17 8.1 Filling ratio of tested mixer .17 8.2 Optimization of mixing time. ..17 Bibliography ..19 iii ded by IHS under lic ense with ISt ed without license from IHS Not for Resale