Many concrete bridge decks, both exposed and asphaltic concrete covered, in Canada and the United States are showing signs of distress. This is largely manifest by surface spalling of the concrete. These decks when examined more closely, were also found to have internal delaminations present. These defects were caused by the corrosion of the steel reinforcing bars (rebars). When these rebars corrode, products of corrosion build up on the rebars and exert pressure on the surrounding concrete. When the pressure exceeds the tensile strength of the concrete a surface spall or an internal delamination results. A literature review on the corrosion of steel in concrete bridges is given by Stratfull (1)* and by Moore et al (2).
© 1976 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1976
Association for Materials Protection and Performance (AMPP)
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