城市污水厂污泥制作蒸压加气混凝土砌块的试验研究

以城市污水污泥为研究对象,将二沉池脱水污泥用生石灰调理至含水率为35%后,进行调理污泥直接制作蒸压加气混凝土砌块可行性的试验研究.将污泥混合粉煤灰、水泥、生石灰等建材后制作砌块成品,同时对砌块的力学性能进行检测.结果表明:调理污泥制作蒸压混凝土砌块具有可行性;在试验砌块中加入5%的城市污泥,制成品符合国家标准(GB11968—2006)要求.该污泥混凝土砌块可以固定污泥中的重金属,制作过程对环境无污染,且节约能源.

A Primary Study on Autoclaved Aerated Concrete Using Municipal Sludge

Possible utilization of urban sewage sludge,in the process of production of autoclaved aerated concrete which was made by sludge-fly ash-cement-burnt lime was investigated.The moisture content of sludge is 35%.Based on the research objective,this study detected the mechanical property of finished products.The results show that:this way might be feasible and energy saving.When autoclaved with 5% sewage sludge,it conforms to the requirement of the national specifications(GB11968—2006).Heavy metals contained in the sludge are well sealed up in the block and do not leach out,and it is uninjurious to environment.