ISO INTERNATIONAL STANDARD 1920-7 First edition 2004-08-01 Testing of concrete Part 7: Non-destructive tests on hardened concrete Essais dubéton- Partie 7: Essais non destructifs du beton durci ... Reference number ISO 1920-7:2004(E) ISO @ ISO 2004 ISO 1920-7:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. AdobeisatrademarkofAdobeSystemsIncorporated Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. 2 @ISO2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, 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 2 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2004 - All rights reserved ISO 1920-7:2004(E) Contents Page Foreword. 1 Scope 2 Terms and definitions.. 3 Determination of rebound number... 3.1 Principle .... 3.2 Apparatus.. 3.3 Test area. 3.4 Procedure. 3.5 Test results .... 3.6 Test report. 4 Determination of ultrasonic pulse velocity .. 4.1 Principle..... 4.2 Apparatus.. 4.3 Performance requirements of apparatus.. 4.4 Procedure......... 4.5 Expression of results. 4.6 Test report.... 5 Determination of pull-out force 5.1 Principle.. 5.2 Apparatus. 5.3 Test area.. 5.4 Procedure.... 5.5 Expression of results.. 5.6 Test report..... 6 General requirements for test reports .. Annex A (informative) Method of obtaining a correlation between strength and rebound number.... 11 Annex B (informative) Factors influencing the rebound of a concrete surface... ....12 Annex C (informative) Example of a test report of the rebound number of hardened concrete.... 14 Annex D (normative) Determination of pulse velocity Indirect transmission, Annex E (informative) Factors influencing pulse velocity measurements. Annex F (informative) Correlation of pulse velocity and strength .. Annex G (informative) Example of a test report of the ultrasound pulse velocity of hardened concrete ... .21 Annex H (informative) Relationship between pull-out force and strength of concrete... Annex I (informative) Example of a test report of the pull-out force of hardened concrete.... Bibliography ..24 .~. @ Is0 2004 - All rights reserved ISO 1920-7:2004(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO InternationalElectrotechnicalCommission(iEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 1920-7 was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre- stressed concrete, Subcommittee S 1, Test methods for concrete. Iso 1920 consists of the following parts under the general title Testing of concrete: Part 1: Sampling of fresh concrete Part 2: Properties of fresh concrete P