| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a technique by which fly ash that is obtained by collecting dust scattered into a flue gas at the time of incinerating municipal waste, is not disposed as waste but handled as a resource and effectively utilized as artificial aggregate. SOLUTION: In this production, fly ash is mixed with bentonite used as a binder and a blending material used as a composition adjuster to obtain a mixture and then, the mixture is fired. At this time, the mixing ratios are adjusted so that the chemical composition of the mixture after firing contains 20 to 80wt.% silica and 10 to 35wt.% calcium oxide and the fired mixture thus obtained is pulverized into a pulverized material having a <=15μm average particle size. Then, water is added to the resultant pulverized material to form formed bodies and thereafter, if necessary, the formed bodies are dried and then, the resulting formed bodies are fired to produce the objective artificial aggregate.</p> |
