陶瓷抛光砖废料(PCTW)是抛光砖生产过程中产生的一种工业废弃物,本文证实了PCTW具有相当的火山灰活性,可以用来制备非蒸压加气混凝土(NAAC).为尽量多地消耗PCTW而获得高性能NAAC,本文研究了一系列制备工艺参数(如水料比、PCTW掺量、铝粉掺量以及初始水温)对NAAC干密度和抗压强度的影响.根据最高比抗压强度(PCS)原则得出NAAC最佳制备工艺参数为:水泥14％(重量百分数,下同);PCTW 30％;粉煤灰(FA) 35％;生石灰18％;石膏3％;铝粉0.09％;水料比0.56;初始水温55℃～60℃.通过比较,采用最佳工艺参数制备的NAAC完全可以达到国家标准的性能要求.羟钙石、托勃莫来石和CSH(Ⅰ)相互交织在一起形成NAAC的微观结构.
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