Effect of mineral admixtures on formwork pressure of self-consolidating concrete

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Owing to enhanced filling ability, self-consolidating concrete offers accelerated casting and superior quality control during construction. However, its high fluidity and high placement rate increase the lateral pressure on the formwork, necessitating an extensive supporting system to retain fresh mixtures in a desired shape. Current recommendations of formwork design for self-consolidating concrete adopt the concept of hydrostatic pressure, even though the measured pressure could be less than the recommended level. This study shows that mineral admixtures such as processed clays can appreciably lessen the formwork lateral pressure. In addition, the correlation between the formwork pressure response and the loss of slump flow is derived, providing an approximate method to estimate the reduction in formwork pressure. (C) 2010 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2010-10
Language
English
Article Type
Article
Citation

CEMENT & CONCRETE COMPOSITES, v.32, no.9, pp.665 - 671

ISSN
0958-9465
DOI
10.1016/j.cemconcomp.2010.07.018
URI
http://hdl.handle.net/10203/240665
Appears in Collection
CE-Journal Papers(저널논문)
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