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Advances in Materials Science and Engineering
Volume 2017, Article ID 5187543, 10 pages
https://doi.org/10.1155/2017/5187543
Research Article

A Study on the Manufacturing Properties of Crack Self-Healing Capsules Using Cement Powder for Addition to Cement Composites

Department of Civil Engineering, Semyung University, Jecheon 390-711, Republic of Korea

Correspondence should be addressed to Yun-Wang Choi; rk.ca.gnuymes@77eterc

Received 21 April 2017; Accepted 22 August 2017; Published 1 October 2017

Academic Editor: Xiao-Yong Wang

Copyright © 2017 Yun-Wang Choi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We fabricated crack self-healing capsules using cement powder for mixing into cement composites and evaluated the properties of the capsule manufacturing process in this study. The manufacture of the self-healing capsules is divided into core production processing of granulating cement in powder form and a coating process for creating a wall on the surfaces of the granulated cement particles. The produced capsules contain unhardened cement and can be mixed directly with the cement composite materials because they are protected from moisture by the wall material. Therefore, the untreated cement is present in the form of a capsule within the cement composite, and hydration can be induced by moisture penetrating the crack surface in the event of cracking. In the process of granulating the cement, it is important to obtain a suitable consistency through the kneading agent and to maintain the moisture barrier performance of the wall material. We can utilize the results of this study as a basis for advanced self-healing capsule technology for cement composites.