Light induced self-healing in concrete using novel cementitious capsules containing UV curable adhesive

被引：37

作者：

Lv, Leyang ^{[1
]}

Guo, Peiyan ^{[1
]}

Liu, Gang ^{[1
]}

Han, Ningxu ^{[1
]}

Xing, Feng ^{[1
]}

机构：

[1] Shenzhen Univ, Sch Civil Engn, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Guangdong, Peoples R China

来源：

CEMENT & CONCRETE COMPOSITES | 2020年 / 105卷

基金：

中国国家自然科学基金;

关键词：

Self-healing; Cementitious capsules; UV curable adhesive; Concrete; MICROCAPSULE; ENCAPSULATION; FEASIBILITY; BACTERIA; BEHAVIOR; SYSTEM;

D O I：

10.1016/j.cemconcomp.2019.103445

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Cracking related deterioration is one of the most important sources of risk that seriously influences the integrity and durability of concrete structures. In this study, a novel type of light induced self-healing mechanism was designed and prepared for automatic healing of cracks in concrete. The self-healing mechanism consists of waterproofing cementitious capsules filled with UV adhesive and a UV light radiator. The shell of capsule is made of three separated but organically bonded functional layers. UV adhesive was first time employed as healing agent for concrete self-healing. The survival of the prepared capsules in the cementitious materials and the ability of capsules to break upon crack were testified. The self-healing efficiency in concrete was evaluated in terms of mechanical recovery, water absorption and water permeability. The test results implied that the proposed self-healing mechanism can be used as an ideal option in revitalizing the performance of cracked concrete.

引用

页数：10

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