マイクロ波によるフレッシュコンクリートの凝結促進効果ならびに早期強度発現促進方法に関する研究

概要

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Setting time of high strength concrete is so longer than that of plane concrete that the high strength concrete mix has not been generally used in the production of precast concrete. Hence, acceleration for the setting time and the early strength has been tried by means of microwave heating. The results are as follows. (1) The microwave curing with naphalene series admixture is more effective for setting time reduction of high strength concrete than the steam curing. (2) The optimum heat curing time to accelerate hydration is 1.5 hour under thermal insulation affter setting time of 2 hours. (3) The optimum heat curing time up to age of 1〜3 days is the same as (2) if naphtalene series admixture is used, while the optimum is 1.5 hour curing under thermal insulation after setting of 0.5 hour.
大同工業大学の論文