Abstract
Drying shrinkage of concrete may still be the main source of cracking in concrete structures, even though the autogenous shrinkage of concrete can be effectively reduced by using internal curing. In the present paper, the effect of internal curing with pre-soaked lightweight aggregate and engineered cementitious composite permanent formwork (ECC-PF) on a moisture distribution in three kinds of concrete in a drying environment are investigated from both aspects of experiments and theoretical modeling. The test results show that the combination use of ECC-PF and internal curing can well maintain the humidity at a relatively high level not only at a place far from drying surface, but also at a place close to the drying surfaces. The developed model can well catch the characteristics of the moisture distribution in concrete under drying and the impacts of internal curing and ECC-PF can well be reflected as well. The model can be used for the design of concrete structures with combination use of internal curing and permanent formwork.
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This work has received the support of a grant from the National Science Foundation of China (51678342) and a grant from a Specialized Research Fund for the Doctoral Program of Higher Education (20130002110034) to Tsinghua University.
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Wang, J., Zhang, J., Ding, X. et al. Effect of cementitious permanent formwork on moisture field of internal-cured concrete under drying. Mech Time-Depend Mater 22, 95–127 (2018). https://doi.org/10.1007/s11043-017-9354-z
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DOI: https://doi.org/10.1007/s11043-017-9354-z