Fresh concrete Ⅰ

[1173] AIR-ENHANCED SELF-COMPACTABILITY OF FRESH CONCRETE WITH EFFECTIVE MIXING METHOD

Anuwat ATTACHAIYAWUTH¹, Kazunori TANAKA², Sovannsathya RATH¹, Masahiro OUCHI² (1.Kochi University of Technology, Infrastructure Systems Engineering 2.高知工科大学Infrastructure Systems Engineering)

Keywords:air-enhanced self-compactability, ball-bearing effect by entrained air, excessive dosage of air-entraining agent, self-compacting concrete, water-dividing mixing method

Air-enhanced self-compacting concrete (airSCC) was developed by making use of ball bearing effect of entrained air. Effective air bubble for airSCC was entrained with water-dividing mixing method and excessive dosage of air-entraining agent. These resulted in air-enhanced self-compactability of fresh concrete. Durability of entrained air was simultaneously improved. Accordingly, aggregate amount in concrete mix proportions could be increased, resulted in the reduction in cement content in mix proportions.