以铁尾矿为主要原料制备加气混凝土,研究了铁尾矿的细度和掺量对其性能的影响.结果表明:随着铁尾矿细度的减小料浆的流动性提高,大量气孔的形成使制品的绝干密度降低；但是,细度过小使料浆的流动性降低,在浇注过程中大量气孔的破裂使制品的绝干密度提高.铁尾矿细度减小可提高水化反应速度,生成更多的水化产物,使制品的抗压强度提高.但是,铁尾矿过细使未反应的原料残核过分细小,不能形成良好的气孔结构,导致其抗压强度降低.提高铁尾矿的掺量能使水化产物之间的空隙充分填充,制品的绝干密度随之提高.铁尾矿掺量的提高使托贝莫来石的数量增加,由针片状变为短纤维状,相互交叉形成了网状结构,使制品的抗压强度提高;但是铁尾矿掺量过高使结晶良好的托贝莫来石数量减少,网状结构变得相对松散,导致制品的抗压强度降低.
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