이 연구의 목적은 하이볼륨 플라이애시(HVFA) 콘크리트의 강도수준 및 플라이애시의 혼입률별로 콘크리트 내의 철근부식 및 염소이온 침투 저항성을 평가하는 것이다. 이를 위하여 물-결합재비 및 플라이애시 혼입률에 따라 철근 상부를 노출시킨 원주형 공시체와 통상적인 원주형 공시체를 제작하였으며, 이들 각각에 대해 압축강도 및 염소이온 침투 저항성 시험과 전기화학적 방법에 의한 철근부식 촉진시험을 수행하였다. 실험 결과, 대체적으로 플라이애시 혼입률이 많을수록 HVFA 콘크리트의 압축강도는 감소하였으나, 철근부식 및 염소이온 침투 저항성은 크게 개선되는 것으로 나타났다.
The purpose of this experimental research is to evaluate the resistance of reinforcement corrosion and chloride ion penetration of high volume fly ash (HVFA) concrete. For this purpose, concrete test specimens were made for various strength level and replacement ratio of fly ash, and then compressive strength and diffusion coefficient for chloride ion of them were measured for 28, 91 and 182 days, respectively. Also, corrosion monitoring by half cell potential method was carried out for the made lollypop concrete test specimens to detect the time of corrosion initiation for reinforcement in concrete. As a result, it was observed from the test results that compressive strength of HVFA concrete was decreased with increasing replacement ratio of fly ash but long-term resistance against reinforcement corrosion and chloride ion penetration of that was increased.
