Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure

Abstract While research on self-healing of cement-based materials has recently gained considerable attention and made sizable progress, there is still ongoing debate and controversy regarding the effect of crack closing induced by autogenous self-healing on mechanical strength recovery. Despite that...

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Autores principales:	A. R. Suleiman, M. L. Nehdi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1c305c199f3e4c2d87cffd1ac391c53d
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spelling	oai:doaj.org-article:1c305c199f3e4c2d87cffd1ac391c53d2021-12-02T14:25:16ZEffect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure10.1038/s41598-021-86596-22045-2322https://doaj.org/article/1c305c199f3e4c2d87cffd1ac391c53d2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86596-2https://doaj.org/toc/2045-2322Abstract While research on self-healing of cement-based materials has recently gained considerable attention and made sizable progress, there is still ongoing debate and controversy regarding the effect of crack closing induced by autogenous self-healing on mechanical strength recovery. Despite that several techniques have been used to capture and quantify the self-healing of surface cracks, the resulting effect on mechanical strength has not, to date, been explored and quantified in a rigorous and systematic manner. Therefore, in this study, a broad array of multi-scale techniques including non-destructive shear wave velocity, high-resolution X-ray computed tomography (µCT), and 3D image analysis was deployed to examine the effects of autogenous crack self-healing on the mechanical strength recovery in various mortar specimens. The influence of microstructural changes induced by additives such as swelling compounds, silica-based additions, and carbonating minerals on strength recovery under diverse environmental exposures was further explored. The results capture the relationship between the crack closing mechanism imparted by self-healing and mechanical strength recovery, therefore elucidating the discrepancies in mechanical strength recovery results reported in the open literature.A. R. SuleimanM. L. NehdiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. R. Suleiman M. L. Nehdi Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure
description	Abstract While research on self-healing of cement-based materials has recently gained considerable attention and made sizable progress, there is still ongoing debate and controversy regarding the effect of crack closing induced by autogenous self-healing on mechanical strength recovery. Despite that several techniques have been used to capture and quantify the self-healing of surface cracks, the resulting effect on mechanical strength has not, to date, been explored and quantified in a rigorous and systematic manner. Therefore, in this study, a broad array of multi-scale techniques including non-destructive shear wave velocity, high-resolution X-ray computed tomography (µCT), and 3D image analysis was deployed to examine the effects of autogenous crack self-healing on the mechanical strength recovery in various mortar specimens. The influence of microstructural changes induced by additives such as swelling compounds, silica-based additions, and carbonating minerals on strength recovery under diverse environmental exposures was further explored. The results capture the relationship between the crack closing mechanism imparted by self-healing and mechanical strength recovery, therefore elucidating the discrepancies in mechanical strength recovery results reported in the open literature.
format	article
author	A. R. Suleiman M. L. Nehdi
author_facet	A. R. Suleiman M. L. Nehdi
author_sort	A. R. Suleiman
title	Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure
title_short	Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure
title_full	Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure
title_fullStr	Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure
title_full_unstemmed	Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure
title_sort	effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1c305c199f3e4c2d87cffd1ac391c53d
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Effect of autogenous crack self-healing on mechanical strength recovery of cement mortar under various environmental exposure

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