Studies on Utilization of Coarse Fly Ash to Concrete
Seiichi NAGAOKA, Kikuo TACHIBANA, Kenji WATANABE, Nobuo UEHARACMitsuhiro ISHII, Hironobu MURAI and Shinji KAWASAKI
Abstract:The coal-fired power plant shows the increasing tendency from excellent in stability of the raw material supply and the economy, and, therefore, the amount of generation of the coal ash is expected to increase greatly, too. Considering such a current state, JIS A 6201 gFly ash for use in concreteh was revised in 1999 aiming at the widely use as an admixture for the concrete. The quality of fly ash was classified into four kinds by this revision, and effective use to the field corresponding to each quality became possible. However, the actual results of coarse fly ash newly added (kind W) are not accumulated enough in this existing state. In this study, to extend the amount of effective use of fly ash, many kinds of concrete using fly ash as a part of fine aggregate or as the admixture for self-compacting concrete were examined. Key Words:Fly ash, Concrete, Fine aggregate, Self-compacting concrete, Unit water weight, Sand percentage