采用硫铝酸盐水泥协同生活垃圾焚烧飞灰作为胶凝材料对渗滤液污泥进行固化，通过无侧限抗压强度试验、浸出毒性分析和微观测试，探索水泥与飞灰的复合固化效果和固化机理.结果表明：当水泥掺量不小于20%时，固化试样的28 d无侧限抗压强度满足填埋强度要求；飞灰是水泥固化渗滤液污泥的优良辅助固化剂，其对水泥固化试样无侧限抗压强度的增强效应存在最优掺量；10%的飞灰可替代10%的水泥而使固化试样达到更好的固化效果；复掺30%或40%水泥+15%飞灰的试样可同时满足填埋强度和浸出毒性的要求.

Leachate sludge was solidified by using sulphoaluminate cement（SAC） and municipal solid waste incineration fly ash as cementitious materials. The composite curing effect and curing mechanism of cement and fly ash were explored through an unconfined compressive strength test， leaching toxicity analysis and microscopic test. The results show that when the cement content is not less than 20%， 28 d unconfined compressive strength of the cement solidified sample meets the landfill strength requirements. Fly ash is an excellent auxiliary curing agent for cement solidified leachate sludge， and its enhancement effect on the unconfined compressive strength of cement solidified samples has an optimal dosage. 10% fly ash can replace 10% cement to achieve a better curing effect. The samples with 30% or 40% cement + 15% fly ash can meet the requirements of landfill strength and leaching toxicity at the same time.

X799.3

国家自然科学基金资助项目（52078142）