Materiales de Construcción, Vol 64, No 316 (2014)

Overview of recent work on self-healing in cementitious materials


https://doi.org/10.3989/mc.2014.05313

Z. Lv
Anhui University of Technology, China

D. Chen
Anhui University of Technology, China

Abstract


Cracks, especially microcracks, in concrete are of paramount importance to the durability and the service life of cementitious composite. However, the self-healing technology, including autogenous healing and autonomous healing, is expected to be one of effective tools to overcome this boring problem. In this paper, we focus on the autogenous healing of concrete material and a few of recent works of autonomous healing are also mentioned. The durability and the mechanical properties improved by the self-healing phenomenon are reviewed from experimental investigation and practical experience. Several aspects of researches, such as autogenous healing capability of an innovative concrete incorporated geo-materials, self-healing of engineered cementitious composite and fire-damaged concrete, effect of mineral and admixtures on mechanism and efficiency of self-healing concrete are summarized to evaluate the presented progresses in the past several years and to outline the perspective for the further developments. Moreover, a special emphasis is given on the analytical models and computer simulation method of the researches of self-healing in cementitious materials.

Keywords


Self-healing; Unhydrated cement nuclei; Cracks; Autogenous healing; Autonomous healing

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