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一种全固废蒸压轻质砌块的研制
作者：檀星1，韩福强1，赵风清1，2
（1.河北科技大学，河北 石家庄 050018；
2.河北省固体废弃物资源化工程技术研究中心，河北 石家庄 050018）
摘要：利用电石渣代替石灰，采用物理发泡和蒸压养护，生产一种全固废蒸压轻质砌块，解决了电石渣用于加气混凝土生产过程中铝粉发泡效果差和产品强度过低的问题。利用自制固化剂代替普通硅酸盐水泥，实现二氧化碳减排。当m（粉煤灰）∶m（电石渣）∶m（矿渣）∶m（固化剂）∶m（脱硫石膏）∶m（发泡剂）=58.5∶20∶10∶10∶1.5∶0.1时，在“升温4 h-180 ℃恒温4 h-自然冷却”的养护制度下，可制得密度为617.5 kg/m3、强度为4.84 MPa、导热系数为0.0672 W/（m·K）、干收缩率为0.487 mm/m的砌块，产品性能优于普通蒸压加气混凝土砌块。XRD分析表明，对砌块强度起关键作用的物质为CSH（I）、托贝莫来石、水石榴石。
关键词：电石渣；固化剂；粉煤灰；矿渣；轻质砌块；全固废
中图分类号：TU522.3+6 文献标识码：A 文章编号：1001-702X（2018）11-0112-04
Development of a solid waste based autoclaved lightweight block
TAN Xing1，HAN Fuqiang1，ZHAO Fengqing1，2
（1.Hebei University of Science & Technology，Shijiazhuang 050018，China；
2.Hebei Engineering Research Center of Solid Wastes Utilization，Shijiazhuang 050018，China）
Abstract：A lightweight block was prepared by physical foaming and autoclaved curing process to solve the problem of poor foaming performance of aluminum powder and low strength when carbide slag was used instead of lime. Curing agent was used to substitute OPC cement to reduce carbon emission. When the mass ratio of fly ash∶carbide slag∶granulated slag∶curing agent∶FGD gypsum∶foaming agent is 58.5∶20∶10∶10∶1.5∶0.1，the block is obtained with the density of 617.5 kg/m3，compressive strength 4.84 MPa. The product has a thermal conductivity of 0.0672 W/（m·K） and a dry shrinkage of 0.487 mm/m. The proper regime is ＂temperature rising 4 h-180 ℃ constant temperature 4 h-natural cooling＂. The performance is higher than that of ordinary autoclaved aerated concrete block. XRD analysis shows that the key materials for block strength are CSH（I），tobermorite and water garnet.
Key words：carbide slag, curing agent，fly ash，slag，light block，solid waste