期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 253, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.119175
关键词
Self-healing; Super Absorbent polymer; Superplasticizer; X-Ray tomography; Microstructural analysis
Concrete is susceptible to cracking typically under tensile stresses which reduces the mechanical resistance and endangers the overall durability of the structure. In this study, Super Absorbent Polymers are used with varying superplasticizer content to evaluate the efficiency of self-healing concrete. In-house fabricated mould is presented that induces controlled crack patterns in the entire volume of the sample. Self-healing efficiency is evaluated by conducting mechanical and non-destructive tests. In addition, X-ray tomography images are reconstructed into a 3-dimensional section to evaluate single crack closure and self-healing potential via porosity and sphericity analysis of cracks, including the reduction in crack width and the volumetric size of single cracks. The experimental results demonstrated that crack width up to 234 mu m was healed with the addition of 2.2% superplasticizer content by weight of cement. (C) 2020 Elsevier Ltd. All rights reserved.
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