アルカリ反応性骨材に関する岩石学的調査(<小特集>岩石力学小特集)

概要

論文の詳細を見る
As the first step of investigation to avoid alkali-silica reaction, a study was carried out on the characteristics of reactive rocks in Japan,especially andesites of the Tertiary and Quaternary Periods. The test methods used were as follows. (1) Observation under a microscope (2) X-ray diffraction analysis (3) ASTM C 289 Standard Test Method for Potential Reactivity of Aggregates (Chemical Me-thod) It was recognized that the rocks containing a large quantity of reactive silica (such as cristo-balite, tridymite, and amorphous silica) were susceptible to alkali-silica reaction. Most of the andesites of the Quaternary were classified as 'deleterious'. Many cracks and cavities, which occu-rred during the cooling of the magma. were observed at the inner part of andesite aggregates in deteriorated concrete structures.
社団法人日本材料学会の論文
1986-05-15