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A probabilistic dosage model of pre-embedded capsules for self-healing in cementitious materials

Author(s): Z. Lv, H.S. Chen
Paper category: Proceedings
Book title: Proceedings of the Seventh International Conference on Concrete under Severe Conditions – Environment and Loading
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjřrv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 661-672
Total Pages: 12
Language : English

Abstract: Crack-repairing technology via embedded capsules containing repair-agent is becoming a promising approach to sustain the performance of cementitious materials. From the viewpoint of geometric probability and the application of concept of integral geometry, this contribution aims to develop and determine the theoretical solution on dosage of capsules required to repair the cracks. Based on a general fact that the capsules are randomly dispersed and the fragmentized cracks occur independently in cementitious materials matrix, the probability of capsules hit by the cracks is presented to develop the theoretical solution on dosage of capsules for self-healing technology via embedded capsules in two- and three-dimensional self-healing system. Then, according to the targeted healing level, a philosophy proposed to fulfill the healing expectations from the probabilistic (risk-based) healing approach, the volume fraction of capsules required in the matrix is determined. Meanwhile, as the cracks grow, the quantitative relation between the volume fraction of capsules required and the size of cracks is investigated. It also mentions that for fragment cracks mode the hitting probability of elongated capsules with aspect ratio is not always larger than that of spherical capsules. The hitting probability referred the size, shape and amount of capsules and the geometric characterizations of cracks would be helpful and give directions for the development of self healing cementitious materials with pre-embedded capsules.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00

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