Development of ultra-high performance concretes with self-healing micro/nano-additions
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2017-05-01
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Abstract
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.
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Publisher Copyright: © 2017 Elsevier Ltd
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Characterization , Durability , Encapsulated additions , High performance concrete , Mechanical performance , Self-healing concrete , Self-healing concrete , High performance concrete , Encapsulated additions , Characterization , Mechanical performance , Durability , Civil and Structural Engineering , Building and Construction , General Materials Science , Funding Info , BIA2011-29234-C02-01 Project, funded by the Spanish Government (Ministerio de Economía y Competitividad)_x000D_ Basque Government through the PI2012-23 Project and Nanoiker Project (Grant No. E11-304) within the Etortek_x000D_ programme and under the umbrella of the Baskrete initiative. , BIA2011-29234-C02-01 Project, funded by the Spanish Government (Ministerio de Economía y Competitividad)_x000D_ Basque Government through the PI2012-23 Project and Nanoiker Project (Grant No. E11-304) within the Etortek_x000D_ programme and under the umbrella of the Baskrete initiative.
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García Calvo , J L , Pérez , G , Carballosa , P , Erkizia , E , Gaitero , J J , Guerrero , A & Gerrero , A 2017 , ' Development of ultra-high performance concretes with self-healing micro/nano-additions ' , Construction and Building Materials , vol. 138 , pp. 306-315 . https://doi.org/10.1016/j.conbuildmat.2017.02.015