실란계 발수제 사용에 따른 모르타르 내구성능 향상효과에 관한 정량적 평가

초록

This study presents a quantitative assessment of the durability of concrete treated with a commercial water-repellent agent. Additionally, the compatibility of the water-repellent agent was examined in terms of concrete strength, cost efficiency, durability, environmental impact, long-term feasibility, and constructability. Mortar specimens were prepared with a cement-watersand ratio of 1.00:0.50:2.50, and a silane-based water-repellent agent was applied to the surface twice. It was found that the water-repellent agent enhanced carbonation resistance by over 60 %, meaning that the time required for carbonation to reach a certain depth increased by at least sixfold. Regarding chloride-induced corrosion, the onset of corrosion occurred between 12 and 22 weeks. In contrast, specimens treated with the water-repellent agent exhibited delayed corrosion initiation at 22 and 24 weeks, with two specimens showing no signs of corrosion even after 26 weeks of monitoring. Furthermore, the water-repellent agent refined the pore structure, leading to a densification of capillary pores in the range of 500–1,000 nm.

키워드