Development of ultra-high performance concretes with self-healing micro/nano-additions

被引：63

作者：

Calvo, J. L. Garcia ^{[1
]}

Perez, G. ^{[1
]}

Carballosa, P. ^{[1
]}

Erkizia, E. ^{[2
,3
]}

Gaitero, J. J. ^{[2
,3
]}

Guerrero, A. ^{[1
,3
]}

机构：

[1] CSIC, Inst Construct Sci Eduardo Torroja, Serrano Galvache 4, Madrid 28033, Spain

[2] Geldo, Sustainable Construct Div, Mat Business Unit, Tecnalia, Edificio 700,Pk Tecnol Bizkaia, Derio 48160, Spain

[3] MATCON, Associated Unit CSIC, Tecnalia, Spain

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 138卷

关键词：

Self-healing concrete; High performance concrete; Encapsulated additions; Characterization; Mechanical performance; Durability; FUNCTIONALIZED SILICA-NANOPARTICLES; CEMENTITIOUS MATERIALS; MICROSTRUCTURE; PERMEABILITY; SYSTEM;

D O I：

10.1016/j.conbuildmat.2017.02.015

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页码：306 / 315

页数：10

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