Internal curing using water-releasing material for high strength micro-expansive concrete |
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Authors: | Linnu Lu Wen Yang Yongjia He Jing Wu and Shuguang Hu |
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Affiliation: | (1) School of Science, Wuhan University of Technology, Wuhan, 430070, China;(2) CSCEC READY MIX CO., LTD., Wuhan, 430074, China;(3) Key Laboratory for Silicate Materials Science and Engineering of Education Ministry, Wuhan University of Technology, Wuhan, 430070, China |
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Abstract: | Due to its low water content, it is difficult for expansive agent to have an effective expansive effect on high strength concrete
to compensate its extensive shrinkage and form a certain expansion. To solve this problem, water-releasing material with water
storage and releasing characteristics was incorporated into high strength micro-expansive concrete to provide internal curing,
and expansive effect of expansive agent was improved. Migration of water from initially saturated water-releasing material
to the surrounding hydrating cement paste was investigated. Based on a given efficient diffusion distance of water stored
in water-releasing material, the mass and real water-cement ratio of cured cement paste were estimated. At the same time,
the effect of internal curing of water-releasing material on the volume deformation of high strength micro-expansive concrete
was investigated.
Funded by the Project of National Natural Science Foundation (No. 50508034) and Guangxi Key Laboratory for the Advance Materials
and New Preparation Technology(No. 063006-5C-13) |
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Keywords: | water-releasing material high strength concrete expansive internal curing |
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