쇄석 골재의 알칼리-실리카 반응에 관한 실험적 연구( 제 2보 : 첨가알칼리량 및 종류가 알칼리-실리카 반응에 미치는 영향)

A Experimental Study on the Alkali-Silica Reaction of Crushed Stones (Part 2 : The Influence of the Alkali Content and the Kind of Added Alkali to the Alkali-Silica Reaction)

The term Alkali-Silica Reaction (ASR) is used to describe a reaction between certain siliceous aggregates and hydroxyl ions present in the pore fluid of a concrete. The ASR is affected by the content of alkali, the particle size and the content of reactive aggregate, water-cement ratio, humidity, temperature and so on. In this paper, the fluence of alkali content and kind of added alkali to the ASR was studied. As a result, the more the content of alkali was increased, the more the mortar-bar was expand and the expansion of mortar-bar was showed differently with the added alkali kinds, The reaction products by ASR were observed by SEM(Scanning Electron Microscope) and analyzed by EDXA(Energy Dispersive X-ray Analysis) also and showed a gel composed of alkali(Na+, K+), silica and calcium.