Title : DEVELOPMENT OF AIR-ENHANCED SELF-COMPACTING CONCRETE
Authors : Masahiro OUCHI, Anuwat ATTACHAIYAWUTH, Kazunori TANAKA, Sovannsathya RATH
Publication : 8 - 10, October 2015
Volume : 1
Pages :
Price : 250
Abstract : The authors have developed a bubble-lubricated Self-Compacting Concrete (SCC) and named it “Air-enhanced Self-Compacting Concrete (air-SCC).” The level of self-compactability of air-SCC was similar to that of conventional SCC by making use of ball-bearing effect of entrained air bubbles. The purpose of the development of air-SCC was to make SCC a standard concrete so that the reliability of concrete structures with which designed performance may be attained in spite of the skill of its construction workers.No other powder material than ordinary portland cement was in use. The unit cement content in air-SCC was around 370 kg, similar to that of conventional concrete and it was effective in reducing the unit cost of SCC. Air bubbles with smaller diameter were suitable for enhancing self-compactability. A mixing method in which not all the materials are to be poured into the mixer and high dosage of air-entraining agent were effective in making air bubbles finer.