暑中コンクリートの温度推定式に関する研究 : 推定式中の係数α、βに関する実機実験

概要

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On hot weather concreting, time-dependent change of fresh concrete temperature should be estimated to prevent troubles, such as slump down and/or cold joint, etc., caused by temperature rise. In this study, the coefficient α and β in the equation estimating fresh concrete temperature shown in JASS 5 were measured and discussed by the real size experiments. The coefficient β, that was the temperature rise due to the heats　caused by the mixer, cement hydration and friction of materials while mixing, was smaller than the values in JASS 5, because mixing period was steadily shortened reflecting the advance of mixers. The coefficient α, that showed heat transfer among air and concrete, was not affected by slump values, ratio of concrete quantity against agitator capacity, etc. That was the different tendency against the small scale experiments.
九州大学大学院人間環境学研究院都市・建築学部門,Faculty of Human-Environment Studies, Kyushu Universityの論文
2009-07-15