Ca-Al 층상이중수산화물을 이용한 콘크리트 내부 염소이온의 이동제어

Abstract

Calcium aluminum layered double hydroxide (Al2O3 Fe2O3 mono: AFm) is one of the hydration products that can be found in portland cement system. Since it can include various anions within its lamellar structure, it is known as one of the most effective hydration product that can bind chloride ion within its structure. In this work, calcium aluminum layered double hydroxide was synthesized using precipitation method, and the chloride ion binding effect and its relationship to prevent chloride ion migration within concrete have been investigated. According to the results in this work, 10 % replacement of Ca-Al LDH with portland cement did not significantly affect 28 day compressive strength. It was also found that use of such replacement level has successfully reduced the chloride ion penetration within concrete