Self-healing performance of concrete for underground space

Wu Mingyue; Hu Xiangming; Zhang QianZhao YanyunLiang YuntaoWang WeiTian Fuchao

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Self-healing performance of concrete for underground space

机译：Self-healing performance of concrete for underground space

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Endowing concrete with self-healing properties is one of the effective methods to improve its durability. In this study, biocapsules and mineral capsules were premixed in cement mortar and cured in wet dry cycles and simulated underground space environment. The self-healing performance of cement-based materials in underground engineering, especially in underground coal mine spaces, and the synergistic effect of biocapsules and mineral capsules on crack repair were studied through indicators such as crack healing efficiency, water absorption, water permeability and air permeability. The study found that the crack healing rate of samples cured in the simulated underground space is lower than that cured in the wet dry cycles. The synergistic repair of cracks of the samples with biocapsules and mineral capsules is reflected in the recovery of bacterial spores, and the mineral capsules can repair the cracks, thereby ensuring that the cracks are in a self-healing state during the entire curing cycle. After healing, the gas barrier of samples with biocapsules and mineral capsules is 8.55-8.69 higher than that of sample only with fibers. The healing product of the samples with biocapsules is spherical calcite-type calcium carbonate, and the healing product of the samples with mineral capsule is the rose-shaped hydromagnesite.

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来源
《Materials and structures》 |2022年第4期|122.1-122.18|共18页
作者
Wu Mingyue; Hu Xiangming; Zhang QianZhao YanyunLiang YuntaoWang WeiTian Fuchao;
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作者单位

Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Shandong, Peoples R China|Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore;

Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Shandong, Peoples R China|Shandong Univ Sci & Technol, State Key Lab Min Lab Disaster Prevent & Control, Qingdao 266590, Shandong, Peoples R China;

Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Shandong, Peoples R ChinaShenyang Res Inst, China Coal Technol Engn Grp, State Key Lab Coal Mine Safety Technol, Fushun 113122, Liaoning, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类
关键词
Underground space; Biocapsule; Mineral capsule; Self-healing; Synergistic repair;

Self-healing performance of concrete for underground space

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