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暑中環境下で施工されるコンクリートの強度発現性状に関する研究 The developments of compressive strength of concrete in high temperature ambience 地濃, 茂雄 development of compressive strength high temperature evaporation hydration P(論文) There are some special problems involved in concreting in hot weather, where they would arise from a higher temperature of the concrete, and, in many cases, from an increased rate of evaporation from the fresh mix. Those problems corer concrete the mixing, placing and curing of the concrete. This research comprises studies on the effects of temperature variations and the rate of evaporation of suface moisture from concrete for the developments of compressive strength of cement concrete. The results of the studies could be summarized as follows : Concretes mixed, placed, and cured at elevated temperatures normally develop at on early stage higher strengths than concretes produced and cured at normal temperatures, howerer at 28 days or more, strengths turn to be lower. A higher evaporation of surface moisture from concrete decreases the strength of the resulting concrete. Such tests illustrate that insufficient curing, especially in combination with high placement temperatures, impairs the hydration process and reduces strength accordingly. Furthermore, when the mixing temperature or the temperature of dormant period of concrete has low temperature values, the long age compressive strength shows higher values than other conditions of concrete. 1991 jpn departmental bulletin paper https://fukuyama-u.repo.nii.ac.jp/records/7822 AN00217655 福山大学工学部紀要 13 125 130 https://fukuyama-u.repo.nii.ac.jp/record/7822/files/KJ00005781195.pdf application/pdf 421.3 kB 1991-01-01