石炭灰の防塵処理と地盤改良への適用

Abstract

Coal fly ash as a by-product from fluidized bed combustion system, is expected to increase significantly, because this system has come into wide use as independent means of electric power generation in some industries due to technical advantages.The coal ash is too dusty to utilize as geomaterials, though it has the advantage of containing lime and gypsum for hardening utilization.In order to promote the utilization of the coal ash, "Non-Dusty Method" by using waste oil is proposed.The experimental evaluation on dust decrease, strength development and oil leachate shows that the coal ash treated by this method can be effectively utilized as embankment materials or soil stabilizer without dust pollution during the execution, and can realize the treatment and potential utilization of surplus soil and waste slurry or sludge generated from foundation works.