ISO INTERNATIONAL STANDARD 19595 First edition 2017-07 Natural aggregates for concrete Granulats pour béton Reference number ISO 19595:2017(E) ISO InteationalganizationforStandadization CIS02017 ted without license from IHS IS0 19595:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice 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 Internatinair PrganizationforStandardization @ IS0 2017 - All rights reserved etworking permitted without license from IHS IS0 19595:2017(E) Contents Page Foreword ..V 1 Scope ..1 2 Normative references 3 Terms and definitions. 4 Symbols and abbreviated terms 5 Geometrical requirements .3 5.1 General. .3 5.2 Aggregate sizes 5.3 Grading. .4 5.3.1 General. 5.3.2 Coarse aggregates. 4 5.3.3 Fine aggregates. .5 5.3.4 All-in aggregates. ..5 5.3.5 Special use aggregates and declared grading categories ..6 5.3.6 Grading for filler aggregate. 6 5.3.7 Natural graded 0/8 mm aggregates. ..6 5.4 Fines content 5.5 Fines quality .1 5.6 Particle shape of coarse and all-in aggregates Flakiness index and shape index. 5.7 Shell content of coarse and all-in aggregates. ..8 6 Physical requirements 6.1 General. 6.2 Resistance to fragmentation. ...8 6.3 Resistancetowear. 6.4 Particle density and water absorption 6.4.1 Particle density. ..8 6.4.2 Water absorption .8 6.5 Bulk density .8 6.6 Resistance to polishing for surface courses 6.7 Resistance to surface abrasion. .9 6.8 Resistance to abrasion from studded tyres to be used for surface courses 7 Chemical requirements .9 7.1 General. .9 7.2 Petrographic description. 7.3 Sulfur containing compounds. .9 7.3.1 Acid-soluble sulfate. .9 7.3.2 Total sulfur. 7.4 Chlorides. ..10 7.5 Constituents which alter the rate of setting and hardening of concrete. ..10 8 Durability .11 8.1 General ..11 8.2 Soundness of coarse aggregates ..11 8.3 Freeze-thawresistance. ..11 8.3.1 Water absorption as a screening test for freeze-thaw resistance ..1 8.3.2 Resistance to freezing and thawing. ..12 8.3.3 Resistance to freezing and thawing in the presence of salt (extreme conditions) ..12 8.4 Volume stability- - Drying shrinkage .. 13 8.5 Alkali-silica reactivity ..13 9 Evaluation of conformity. ..13 10 Designation ..14 ntemaonalganizatin7All rightsreerved iii vided by IHS under license with ISC ed without license from IHS