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Title |
Self-Healing Performance of Concrete Cracks Using Pozzolanic Materials
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Authors |
이주현(Joo-Hyun Lee) ; 이정배(Jeong-Bae Lee) |
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DOI |
https://doi.org/10.4334/JKCI.2024.36.6.583 |
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Keywords |
균열; 자기치유; 천연포졸란 concrete cracks; self-healing of cracks; natural pozzolan |
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Abstract |
Concrete is a highly durable material widely used in the construction of structures. However, cracks can develop due to various internal and external factors, providing pathways for harmful agents to penetrate the concrete, thereby reducing its durability. This study aims to examine the self-healing performance of concrete containing natural pozzolan materials, where reaction products formed through contact with moisture act to autonomously heal cracks. To achieve this objective, the compressive strength, drying shrinkage, chloride ion penetration resistance, and absorption rate of the concrete incorporating natural pozzolan were evaluated at different curing ages. Additionally, artificial cracks were induced in the concrete and observed using a zoom optical microscope. The observations revealed the formation and growth of crystals within the cracks, confirming that when an appropriate amount of natural pozzolan material was incorporated, the cracks were effectively sealed.
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