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Characterisation of a vascular self-healing cementitious material system: Flow and curing properties

Selvarajoo, T., Davies, R. E. ORCID:, Gardner, D. R. ORCID:, Freeman, B. L. and Jefferson, A. D. ORCID: 2020. Characterisation of a vascular self-healing cementitious material system: Flow and curing properties. Construction and Building Materials 245 , 118332. 10.1016/j.conbuildmat.2020.118332

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A series of characterisation studies are reported that provide new data on the behaviour of a self-healing cementitious material (SHCM) system. A ‘model’ material system is selected for study that comprises cyanoacrylate (CA) filled channels in concrete structural elements. The focus of the work is on transport and curing properties of the healing-agent, with the results of four separate studies being presented. The experimental programme encompasses the capillary flow behaviour of CA in a static natural crack, the sorption of healing-agent through a cracked surface into a concrete specimen, the development and progress of a CA curing front adjacent to a concrete substrate and the dynamic flow characteristics of CA in capillary channels. A theoretical relationship is established for each of these processes, which allows meaningful parameters to be determined that help characterise the behaviour of the material system. In all cases, the processes were shown to have a significant degree of variability but, equally, to exhibit strong behavioural trends.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Publisher: Elsevier
ISSN: 0950-0618
Date of First Compliant Deposit: 26 February 2020
Date of Acceptance: 31 January 2020
Last Modified: 11 Nov 2023 17:48

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