Chapter
Apr 26, 2012
Effect of Lightweight Aggregate with Different Moisture on Autogenous Shrinkage and Stress under Partially Restrained Condition
Authors: Shuhui Dong [email protected], Baosheng Zhang [email protected], Yong Ge [email protected], and Jie Yuan [email protected]Author Affiliations
Publication: ICCTP 2009: Critical Issues In Transportation Systems Planning, Development, and Management
Abstract
A study of the efficiency of lightweight aggregate (LWA) in controlling restrained shrinkage cracking of low water-to-cement ratio concrete is presented. Free autogenous shrinkage test of concrete specimens and restrained test with ASTM C 1581-04 were performed. Autogenous shrinkage and restrained stress of concrete with different moisture content (0%, 20%, 40%, 60%, and 100%) LWA at the same water-to-cement ratio of 0.30 were investigated by experiments that provided date on free autogenous shrinkage and restrained shrinkage. The results showed that the pre-wetting LWA effectively reduced autogenous shrinkage, restrained shrinkage and tensile stress in the restrained conditions. Also, it was found that the shrinkage stress was relaxed more and more with degree of saturation of LWA increasing, and can be mitigated by 45.7% in the concrete with the saturated LWA.
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ICCTP 2009: Critical Issues In Transportation Systems Planning, Development, and Management
Pages: 1 - 7
Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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Affiliations
School of Transportation Science and Engineering, Harbin Institute of Technology, 202 Haihe Road, Nangang District, Harbin 150090, P.R. China;. E-mail: [email protected]
School of Transportation Science and Engineering, Harbin Institute of Technology, 202 Haihe Road, Nangang District, Harbin 150090, P.R. China;. E-mail: [email protected]
School of Transportation Science and Engineering, Harbin Institute of Technology, 202 Haihe Road, Nangang District, Harbin 150090, P.R. China;. E-mail: [email protected]
School of Transportation Science and Engineering, Harbin Institute of Technology, 202 Haihe Road, Nangang District, Harbin 150090, P.R. China;. E-mail: [email protected]
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