ISO INTERNATIONAL STANDARD 15912 Secondedition 2016-01-15 Dentistry Refractory investment and die material Médecine bucco-dentaire - Revetements et matériaux pour modeles refractaires Reference number ISO 15912:2016(E) ISO International Organization for Standardization ZHEJIANG INST OF STANDARDIZATION C15956617 @ISO2016 itted without license from IHS IS0 15912:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS02016,PublishedinSwitzerland 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 +41227490947 [email protected] www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZoISQ s.6 - All rights reserved I by IHS unde Not for Resale, 2016/3/29 02:53:02 etworking permitted without license from IHS IS0 15912:2016(E) Contents Page Foreword ..V 1 Scope .1 2 Normative references 3 Terms and definitions 4 .3 Classification 5 Requirements .3 5.1 General. .3 5.2 Material consistency and freedom from contamination .3 5.3 Fluidity .3 5.4 Initial setting time. ..4 5.5 Compressive strength 4 5.6 Linear thermal dimensional change 5.7 Adequacy of expansion of Type 1 and Type 2 materials .4 6 Sampling, test conditions and mixing .4 6.1 Sampling. ..4 6.2 Test conditions 4 6.3 Mixing .5 6.3.1 Apparatus. .5 6.3.2 Procedure. .5 7 Test methods. .5 7.1 Material consistency and freedom from contamination .5 7.1.1 Test procedure. .5 7.1.2 Test report. .5 7.2 Fluidity .5 7.2.1 Apparatus. .5 7.2.2 Number of test-pieces .6 7.2.3 Test procedure ..6 7.2.4 Evaluation of results. .6 7.2.5 Test report .6 7.3 Initial setting time. .7 7.3.1 Apparatus .7 7.3.2 Procedure. .9 7.3.3 Number of determinations. 9 7.3.4 Evaluation of results. .10 7.3.5 Testreport .10 7.4 Compressive strength 10 7.4.1 Apparatus. ..10 7.4.2 Number of test-pieces ..10 7.4.3 Preparation of test-pieces .11 7.4.4 Test procedure .11 7.4.5 Evaluation of results. .12 7.4.6 Test report .12 7.5 Linear thermal dimensional change .12 7.5.1 Apparatus.. .12 7.5.2 Number of test-pieces ..13 7.5.3 Preparation of the test-piece. ..13 7.5.4 Test procedure for the measurement of linear thermal expansion of Types 1, 2 and 3 products.. .14 7.5.5 Test procedure for the measurement of linear thermal dimensional changes of a Type 4 product. .15 7.5.6 Evaluation of results. ..15 7.5.7 Test report. ..16 iii ISee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS