An Experimental Study on the Alkali-Silica Reaction of Crushed Stones (Part 3 : The Influence of the Innocuous Aggregate Content and Pozzolanic Materials to the Alkali-Silica Reaction)

쇄석골재의 알칼리-실리카 반응에 관한 실험적 연구 (제3보 : 무해골재 치환량 및 포졸란물질이 알칼리-실리카 반응에 미치는 영향)

Recently, the use of crushed stones is increased due to the shortage of natural aggregates. In the previous papers of part 1 and 2, we got the conclusions that some of crushed stones have the characteristic of alkali-silica reaction(ASR). And these reactions are influenced by the amount and type of alkali in cement. The purpose of this paper is how to prepare for the prevention against alkali-silica reaction. As a solution of problems, we have conducted the experiments of two methods. One was the replacement of innocuous aggregates instead of reactive aggregates, the other was the addition of various pozzolanic materials. As a result, we found that the expansion by alkali-silica reaction in mortar bar could be effectively decredsed by upper methods.