Assessment of cracking in concrete due to hydration heat and autogenous shrinkage

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An experimental study was conducted to simulate the generation of thermal stresses due to hydration heat and restraint by using a thermal stress measuring device (TSD). The net effects of time-dependent properties of hardening concrete can be well incorporated in TSD due to simultaneous development of temperature and corresponding stress in restrained specimen. Moreover, experiments were conducted to measure a precise value of early-age autogenous shrinkage (AS) and to evaluate the basic creep model with respect to AS. In cracking risk analysis, precise value of early-age AS must accurately predict the time of shrinkage-induced cracking. A significant difference exists between apparent (including AS) and real basic creep (excluding AS) for low water-cement ratio concrete and early-age normal strength concrete. To improve the crack sensitivity analysis, it is recommended to precisely measure early-age AS and modify the basic creep model to prevent from possible errors and computational problems. © 2010 Inderscience Enterprises Ltd.
Publisher
Inderscience Enterprises Ltd.
Issue Date
2010
Language
English
Citation

INTERNATIONAL JOURNAL OF STRUCTURAL ENGINEERING, v.1, no.2, pp.145 - 159

ISSN
1758-7328
URI
http://hdl.handle.net/10203/97527
Appears in Collection
CE-Journal Papers(저널논문)
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