A Study on the Alkali Application of Recycled Aggregates as a Solution to Reduced Intial Intensity of Blast Furnace Slags

고로슬래그의 초기강도 저하 해결방안으로써 순환 잔골재의 알칼리 활용가치에 대한 연구

Weakness of fine powder of blast furnace slags includes the decrease of initial intensity and delay of setting time. To solve this problem, there has been research on the alkali activation to induce hardening using alkaline chemical. However, the use of chemicals is dangerous and not cost effective, which can be solved by using recycled aggregates, one of construction wastes. The role of alkali activator can be substituted by alkali of non-hydrated cement included in recycled aggregates. In this study, the alkaline value of recycled aggregates will be evaluated through the comparison of molarity of sodium hydroxide (NaOH).