ISO INTERNATIONAL STANDARD 17892-7 First edition 2017-11 Geotechnical investigation and testing - Laboratory testing of soil - Part 7: Unconfined compression test Reconnaissance et essais geotechniques-Essais de laboratoire sur lessols- Partie7:Essaidecompressionuniaxiale Reference number IS0 17892-7:2017(E) ISO @ISO2017 IS017892-7:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org i IS02017-All rights reserved IS0 17892-7:2017(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Symbols. 5 Apparatus ..2 6 Testprocedure .4 6.1 General requirements and equipment preparation .4 6.2 Preparation of specimens. 4 6.3 Initial readings .5 .5 6.4 Compression 6.5 Dismounting. .6 7 Test results. .6 7.1 Bulkdensity,dry density and watercontent .6 7.2 Stressandstrainduringcompression .6 7.3 Unconfinedcompressivestrength ..6 7.4 Undrained shear strength. .7 8 Test report. .7 8.1 Mandatory reporting 8.2 Optional reporting. .7 AnnexA (normative)Calibration,maintenanceandchecks .8 Bibliography .10 @ IS0 2017 - All rights reserved ili