Effect of cement powder based self-healing solid capsule on the quality of mortar. (30th July 2019)

• Record Type: Journal Article
• Authors: Oh, Sung-Rok; Choi, Yun Wang; Kim, Yong Jic
• Is Part Of: Construction & building materials. Volume 214(2019)
• Page Start: 574
• Page End: 580
• Publication Date: 2019-07-30
• Subjects: Self-healing solid capsule (SHC) -- Crack -- Dispersibility -- Flowability -- Elastic moduli; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2019.04.123
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlight: Self-healing solid capsule (SHC) were prepared by using cement powder for crack self-healing of concrete structure. The plain mix was selected considering the loss of capsule and dispersibility. The flowability decreases and the air content increases as the mixing ratio of SHC increase. The mechanical properties tended to decreases as the mixing ratio of SHC increase. Abstract: In this study, self-healing solid capsule (SHC) were prepared by using cement powder for crack self-healing of concrete structure. The plain mix was selected that considering the loss ratio of capsule and dispersibility. Mixing rate of solid capsule were 5, 10 and 15% based on cement mass. The mortar with solid capsule were investigated for the basic quality such as flow, air content, compressive strength, splitting tensile strength, elastic moduli and dry shrinkage. The focus of this paper is to evaluate the effect of solid capsule mixing on the quality of mortar instead of self-healing effects of solid capsule. Experimental results show that the flowability decreases and the air content increases as the mixing rate of SHC increase. And the compressive, splitting tensile strength and elastic moduli tended to decreases as the mixing rate of SHC increase. The effect of particle size show that the flowability increases and the air content decreases as the particle size of SHC becomes larger. And, the compressive, splitting tensile strength and elastic moduli tended to increases as the particle size of SHC becomes larger.