폐콘크리트 재생잔골재의 산중화능 산정

초록

It is necessary to establish ANP(acid neutralization potential) indicator as a chemical property of recycled-concrete aggregates(RCA), which can be used to expand chemical reuse of RCA as a neutralizer and to predict adverse effect of RCA to the environment, producing high alkalinity(pH increase) from the leachate. From this research, alkalinity production can be measured based on the leaching test conducted with packed-columns of RCA which were drained out repeatedly by the supplied water under the acting of natural gravity. Total produced-alkalinity per unit mass of RCA was derive as an ANP indicator in the end, and repeated experiments showed that 26.4∼28.2(mg/L as CaCO3 per g of RCA) was calculated as a result from this research.

키워드