Experiments have been performed where pretensioned concrete specimens were instrumented with strain gages, thus permitting shape change to be monitored with time during corrosion exposure. While the strain change associated with tendon cutting and subsequent curing was compressive due to load transference to the concrete followed by creep and shrinkage, expansion of specimens was noted during seawater ponding and anodic and cathodic polarization. The net specimen expansion which occurred in conjunction with cathodic polarization exceeded that which could be accounted for by even complete loss of prestress. Thus, while loss of bond between the tendon and concrete may have occurred, the extent of this could not be determined. On the other hand, the observed specimen expansion was consistent with cement hydration, the magnitude of which was compounded by products from anodic and cathodic processes.

Subject
Cathodic polarization, Materials, Tendons, Seawater, Stress, Corrosion losses, Cutting, Steel, Cement, Corrosion data, Risk reduction, Anodic polarization, Concrete
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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