期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 138, 期 -, 页码 306-315出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.02.015
关键词
Self-healing concrete; High performance concrete; Encapsulated additions; Characterization; Mechanical performance; Durability
资金
- Spanish Government (Ministerio de Economia y Competitividad)
- Basque Government through PI2012-23 Project
- Basque Government through Nanoiker Project within Etortek programme [E11-304]
- Basque Government under umbrella of the Baskrete initiative
- [BIA2011-29234-C02-01]
UHPC are developed in present paper incorporating an innovative self-healing system based on two micro/nano-additions: silica microcapsules containing epoxy sealing compound (CAP) and amine functionalised silica nanoparticles. Although CAP are well integrated within the cementitious matrix, their inclusion promotes a reduction in the mechanical performance so CAP could act as weak points. However, the inclusion of these additions refines pore distribution thus increasing the expected durability in aggressive media. An effective autonomous self-healing capacity is assessed/confirmed which is unexpectedly higher in the concretes with the lower healing additions content studied. This capacity depends on the crack width and the healing period considered. (C) 2017 Elsevier Ltd. All rights reserved.
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