@article{oai:ir.kagoshima-u.ac.jp:00004594, author = {久米, 国幹 and KUME, Kunimoto and 迫田, 順一 and SAKODA, Junichi and 川畑, 勇一郎 and KAWABATA, Yuichiro}, journal = {鹿児島大学工学部研究報告, The research reports of the Faculty of Engineering, Kagoshima University}, month = {Nov}, note = {We made a lithologic observation by a polarizing microscope and powder X-ray analysis, and we also made an analysis of harmful aggregates by the mortar bar method (JIS), the pessimum value of the expansion depends on the reactive aggregate content, and upon a comparison of concrete bar with mortar bar in the expansion of alkali reaction in used crushed-stone in Kagoshima. The followmg results were obtained: 1) By the mortar bar method there were confirmed three reactive aggregates. These were all andesites. But, among the same andesites, some show little or no reaction. 2) By the lithologic observation, it was found that reactive aggregate contains Cristabalie, Chaynockite, Quartz, Volcanic-Glass-Sand and Geothite, also, there was found change in quality such as in the Hydrated-Iron in the groundmass. 3) It was found that the pessomum value of the expansion and its curve vary according to each aggregate. 4) The expansion rate of concrete bars was only 10% of that of mortar bars.}, pages = {111--132}, title = {鹿児島県産砕石のアルカリ反応に関する実験的研究}, volume = {31}, year = {1989} }