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Title |
Evaluation of Crack-Healing Performance in Mortars Containing Hybrid Inorganic and Bacterial Self-healing Pellets
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Authors |
이재윤(Jae-yun Lee) ; 양근혁(Keun-hyeok Yang) ; 정기태(Ki-tae Jeong) |
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DOI |
https://doi.org/10.4334/JKCI.2024.36.5.409 |
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Keywords |
균열 치유; 박테리아; 환 crack healing; bacteria; pellet |
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Abstract |
This study examined the compressive strength development and crack-healing performance of mortars containing hybrid inorganic and bacterial self-healing pellets. The pellets were sieved to achieve a particle size distribution between 600 μm and 1.7 mm. For the hybridization, the proportion of inorganic pellets ranged from 70 % to 90 %, while bacterial pellets constituted 30~10 %. The pellets were added as a 10 % volume replacement of fine aggregate in the mortar mixture. Test results revealed that the 28-day compressive strength of mortar specimens with the hybrid pellets increased by up to 1.23 times compared to plain mortar without pellets. Mortars with hybrid pellets exhibited efficient crack restoration, achieving self-healing ratios of 93~97 % for nominal crack widths of 0.3 mm. The hybridization of 80 % inorganic pellets and 20% bacterial pellets showed good promise concerning the 28-day compressive strength and self-healing of cracks.
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