多孔轻骨料自修复水泥基材料研究进展.

Under loading and environment, the cracking will easily occur and reduces the durability and strength of the structure concrete. Inspired by the capsule-based self-repairing system, a self-healing system of repairing agent to be encapsulated in the porous lightweight aggregates that are used as carriers was proposed. In the paper, the recent progresses of lightweight aggregates self-repairing cementitious materials are reviewed and the rupture mode of inorganic porous lightweight aggregates and the mechanism of repairing agent to be released are described. The mechanical properties and durability of the cementitious matrix are compared before and after the repairing process and the evaluation methods of crack-repairing degree and repairing efficiency are also discussed. Finally, the key problems and the research direction of lightweight aggregate self-repairing cementitious material are summarized. [ABSTRACT FROM AUTHOR]