Integral procedure to assess crack filling and mechanical contribution of polymer-based healing agent in encapsulation-based self-healing concrete

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• 作者：F.A. Gilabert^a ; ^d ; ^{fran.gilabert@ugent.be} ; K. Van Tittelboom^b ; J. Van Stappen^c ; ^d ; V. Cnudde^c ; N. De Belie^b ; W. Van Paepegem^a
• 关键词：Self-healing materials ; Capsules ; Agent leakage ; Capillary force ; Strength recovery ; Tensile test
• 刊名：Cement and Concrete Composites
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：77
• 期：Complete
• 页码：68-80
• 全文大小：4392 K
• 卷排序：77

文摘

Integral procedure to analyze crack filling process of PU resin in encapsulation-based self-healing concrete. Specimen design provides control over the capsule breakage, crack opening distance and easy mechanical testing. Study comprises micro-CT technique, image analysis, tensile tests and CFD simulations. Two setups studied: sample with two capsules (resin+accelerator) and sample with one capsule (only resin). No foaming is produced but healed resin strength ranges between 1.2 MPa and 3.7 MPa, for crack spaces between 381 μm and 50.8 μm, respectively.