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Shrinkage mechanisms, crack formation and service life of reinforced concrete structures

Shrinkage mechanisms, crack formation and service life of reinforced concrete structures Shrinkage of concrete is most often at the origin of crack formation. Cracks are preferential paths for ingress of aggressive substances such as chlorides or sulfates into the composite structure of concrete. Reduced shrinkage means generally extended service life of reinforced concrete constructions. It is shown that shrinkage is not due to capillary action but it depends essentially on disjoining pressure in the nanopores of hydration products of Portland cement. All reactions which reduce disjoining pressure, reduce shrinkage. Shrinkage can be minimised by optimisation of the chemical composition of the pore solution. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Structural Engineering Inderscience Publishers

Shrinkage mechanisms, crack formation and service life of reinforced concrete structures

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References (15)

Publisher
Inderscience Publishers
Copyright
Copyright © Inderscience Enterprises Ltd. All rights reserved
ISSN
1758-7328
eISSN
1758-7336
DOI
10.1504/IJStructE.2009.030023
Publisher site
See Article on Publisher Site

Abstract

Shrinkage of concrete is most often at the origin of crack formation. Cracks are preferential paths for ingress of aggressive substances such as chlorides or sulfates into the composite structure of concrete. Reduced shrinkage means generally extended service life of reinforced concrete constructions. It is shown that shrinkage is not due to capillary action but it depends essentially on disjoining pressure in the nanopores of hydration products of Portland cement. All reactions which reduce disjoining pressure, reduce shrinkage. Shrinkage can be minimised by optimisation of the chemical composition of the pore solution.

Journal

International Journal of Structural EngineeringInderscience Publishers

Published: Jan 1, 2009

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