4.7 Article

Self-healing of the textile-reinforced concrete: Additives and coatings

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CONSTRUCTION AND BUILDING MATERIALS
卷 364, 期 -, 页码 -

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ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2022.129930

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Textile reinforced concrete; Self -healing; Cement; Water permeability; Crystals admixture; Bond strength

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Textile reinforced concrete (TRC) is a stronger, more flexible, and non-corrosive alternative to steel rebar reinforcement. It forms multiple thin cracks upon loading instead of wide cracks in rebar reinforcement. The self-healing of these cracks can be accelerated by modifying the concrete matrix and decorating the carbon-based textile.
Textile reinforced concrete (TRC) is an attractive alternative to the classic steel rebar reinforcement since the textile is stronger, more flexible, and non-corrosive compared to steel. Moreover, the TRC approach promotes the formation of multiple thin cracks pattern upon loading instead of a few wide cracks in rebar reinforcement. We found that the self-healing of these multiple thin cracks was accelerated by modifying the concrete matrix (addition of crystalline additive and alumina nanofibers) and by decorating the carbon-based textile with micro silica particles. Exposing the TRC samples to a saturated NaCl environment (as in coastal constructions) improved the bonding strength between the textile and the matrix, hence increasing the self-healing capability (compared to samples cured in tap water).

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