ISO INTERNATIONAL STANDARD 14688-1 Second edition 2017-12 Geotechnical investigation and testing Identification and classification of soil - Part 1: Identification and description Reconnaissance et essais geotechniques -Identification et classification des sols- Partie1:Identification et description Reference number ISO 14688-1:2017(E) ISO @ ISO 2017 IS014688-1:2017(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 [email protected] www.iso.org ii IS02017-Allrights reserved IS0 14688-1:2017(E) Contents Page Foreword iv Introduction V 1 Scope .1 2 Normativereferences .1 3 Terms and definitions .1 4 General. .3 5 Identification of soil 4 5.1 Mineral soil. 4 5.1.1 General. 4 5.1.2 Composite soils 8 5.1.3 Plasticity 9 5.1.4 Organiccontentinmineral soils 9 5.2 Organicsoils 9 5.3 Carbonate soils. 10 5.4 Sulfide soils 10 5.5 Volcanic soils 10 5.6 Loess 10 5.7 Glacial soils. 10 5.8 Anthropogenic soil .10 5.9 Origin of deposit 11 5.9.1 General. .11 5.9.2 Depositional environment 11 5.9.3 Geological unit 11 Descriptionof soil .11 6 6.1 Description of soil properties 11 6.1.1 Particle size distribution 11 6.1.2 Particleshape 11 Particle strength .12 6.1.3 6.1.4 Mineral composition .12 6.1.5 .12 Finescontent 6.1.6 Consistency 12 6.1.7 Soil colours. 13 6.1.8 Organic content 14 6.1.9 Carbonate content 14 6.1.10 Degree of decomposition of peat 14 6.2 Descriptionofdifferentsoiltypes. 15 6.2.1 Volcanic soils 15 6.2.2 Loess. 15 6.2.3 Glacial soils .15 6.2.4 Anthropogenic soil. .16 7 Descriptionofbeddinganddiscontinuities .16 7.1 Bedding. 16 7.2 Discontinuities .17 7.3 Interbedding and mixed soils ..17 8 Reporting .17 Annex A (informative) Procedures for identification of the primary fraction in mineral soils .19 Bibliography .23 @ IS0 2017 - All rights reserved iii