Improving the Autogenous Self-Sealing of Mortar: Influence of Curing Condition |
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| Authors: | Lianwang Yuan Min Li Yongbo Huang Zonghui Zhou Congqi Luan Zunchao Ren Yongyi Liu Tongtong Zhou Xin Cheng Jinbang Wang |
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| Affiliation: | 1.Shandong Provincial Key Laboratory of Preparation and Measurement of Building Material, University of Jinan, Jinan 250022, China; (L.Y.); (Y.H.); (C.L.); (Z.R.); (Y.L.); (X.C.);2.School of Materials Science and Engineering, University of Jinan, Jinan 250022, China;3.Shandong Sanjian Group Co., Ltd., Jinan 250100, China;4.Shandong Hi-Speed Road & Bridge Maintenance, Ltd., Jinan 250100, China; |
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| Abstract: | With the construction of projects under severe environments, new and higher requirements are put forward for the properties of concrete, especially the autogenous self-sealing property, which is greatly affected by the curing environment and the state of the water. Herein, six types of curing conditions, including in air with a relative humidity of 30%, 60%, and 95%; flowing water; wet-dry cycles; and static water, are designed to investigate the autogenous self-sealing of mortar under different curing conditions. The results showed that the self-sealing ratios are higher than 60% and the cracks are closed for the mortar undergoing the wet-dry cycles and the static water. However, the self-sealing ratios of mortar are lower than 10% and the cracks are almost unchanged when the mortar is cured in the air with a relative humidity (RH) of 30% and 60%. The static liquid water is more conducive to the continued hydration of cement and the formation of CaCO3 than the flowing water. The research provides guidance for the design of concrete and the improvement of autogenous self-sealing when the concrete serves in different environments. |
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| Keywords: | autogenous self-sealing curing condition relative humidity state of water continuous hydration carbonation |
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