Journal
CEMENT & CONCRETE COMPOSITES
Volume 48, Issue -, Pages 83-90Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2013.10.012
Keywords
Concrete; Early age behaviour; Mechanical properties; Degree of hydration; Basic creep
Funding
- NSFC [50838004, 51308405]
- National Basic Research Program of China ((973 Program) [2011CB013800]
- PCSIRT [IRT1029]
- LiSUM
- Kwang-Hua Fund Primary
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An accurate estimation of the early-age creep behavior is not only required to successfully control the early age cracking of concrete, but also to analyse the vertical and differential deformations of super high-rise buildings during construction. The fictitious degree of hydration model was developed to study basic creep behavior of hardening concrete, however, nowadays more complex binder systems are applied, consisting of several different types of powders, requiring further validation of the applicability of this creep model. The compressive basic creep and creep recovery of concrete based on ternary blends including Portland cement, blast furnace slag, and fly ash is experimentally studied. The tests are conducted at different ages of loading at early age under varying stress level. It is shown that the fictitious degree of hydration method can be successfully applied to ternary blends, even simplifying the hydration process to one overall reaction, considering only one degree of hydration. (C) 2013 Elsevier Ltd. All rights reserved.
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