Microscopic Tests on Evaluation of Self-Healing Efficiency in Cementitious Materials with a Novel Self-Healing System

Zhen Hong Yang; Xian Feng Wang; Ning Xu Han; Feng Xing

doi:10.4028/www.scientific.net/MSF.996.104

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HomeMaterials Science ForumMaterials Science Forum Vol. 996Microscopic Tests on Evaluation of Self-Healing...

Microscopic Tests on Evaluation of Self-Healing Efficiency in Cementitious Materials with a Novel Self-Healing System

Abstract:

In this study, Na₂CO₃ solution as a self-healing agent was impregnated in LWA for autonomic self-healing on cracked cementitious material. The results showed that under the joint action of expansive agent, crystalline additive, phosphate and carbonate, the crack area showed a high self-healing efficiency (close to 70%) after curing in the still water 28d. SEM-EDS test results showed that in addition to ettringite and C-S-H/C-A-S-H, there was also a large amount of CaCO₃ crystal in the depths of the crack.

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Periodical:

Materials Science Forum (Volume 996)

Pages:

104-109

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.996.104

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Online since:

June 2020

Authors:

Zhen Hong Yang, Xian Feng Wang*, Ning Xu Han, Feng Xing

Keywords:

Carbonate, Crack, Lightweight Aggregate (LWA), Mineral Admixtures, Self-Healing

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