SELF-HEALING CEMENT MORTAR BASED ON  UREA-FORMALDEHYDE/EPOXY CAPSULES

Võ Trung Kiên; Huỳnh Đăng Huỳnh; Hồ Viết Thắng

doi:10.34238/tnu-jst.13270

SELF-HEALING CEMENT MORTAR BASED ON UREA-FORMALDEHYDE/EPOXY CAPSULES

About this article

Received: 21/07/25 Revised: 26/11/25 Published: 26/11/25

Authors

1. Vo Trung Kien, University of Science and Technology - The University of Danang
2. Huynh Dang Huynh, University of Science and Technology - The University of Danang
3. Ho Viet Thang , University of Science and Technology - The University of Danang

Abstract

The formation and development of cracks due to environmental impacts is one of the main causes of reduced durability and longevity of building constructions using cement materials. Present crack healing methods are often expensive and complicated. Therefore, the development of cement materials with self-healing ability is a promising research direction. This study presents the fabrication process and evaluation of the effectiveness of self-healing capsules for cement materials. The capsules were successfully synthesized by the polymerization method with a shell/core structure consisting of urea-formaldehyde resin/epoxy resin. The size of the obtained capsules ranges from 0.1 to 2 µm. The crack healing efficiency was investigated by adding capsules to the cement mixture at a content of 1% - 4% compared to the cement mass. The results showed that the cement sample containing 1% capsules showed the highest recovery efficiency in mechanical strength and healing within 14 days. These results confirm the potential application of epoxy capsules in the production of self-healing cement, contributing to improving the longevity and sustainability of building constructions.

Keywords

Self-healing cement; Capsule; Urea-formaldehyde; Epoxy; Self-healing

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DOI: https://doi.org/10.34238/tnu-jst.13270

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