[1231] FINENESS OF AIR BUBBLES AFFECTED BY MIXING PROCEDURE IN MORTAR IN SELF-COMPACTING CONCRETE
キーワード：fineness of air bubbles, fresh mortar, mixing procedure, self-compacting concrete
The purpose of this study is to introduce an approach in improving fineness of air bubbles to ensure stability of air and enhance self-compactability of air-enhanced self-compacting concrete (air-SCC). Experiments were conducted to clarify the effect of different mixing procedure, mixing time with air-entraining agent (AE), mixing time with superplasticizer (SP), and dosage of SP on the fineness of air bubbles. With an effective mixing procedure, increasing dosage of AE and adjusting mixing time with AE or mixing time with SP produced finer and more stable air bubbles.