摘要
通过对污水污泥掺加垃圾焚烧底灰和石灰进行固化,确定了最小石灰掺加量,测试固化体的液塑限、无侧限抗压强度、击实性和微结构特征,通过研究发现随着垃圾焚烧底灰掺量的增大,液塑限及塑性指数均减小,无侧限抗压强度增大,当掺量约一半时,2 8 d时的无侧限抗压强度可达6 0 K P a以上;对于纯污泥,其最大干密度为7.9 K N/m3,最优含水量为6 6%,随着垃圾焚烧底灰掺量的增大,最优含水量降低,最大干密度增大。最后给出了固化强度的预测公式,可用于预测不同龄期和不同掺量时的强度。
Test on properties of the sewage sludge solidified by waste incineration bottom ash （WIBA） and lime with different amount was performed, the minimum amount of lime to add in was determined, and the liquid limit, plastic limit, unconfined compressive strength, compaction properties and micro-structural features were measured. Some conclusions were gotten： （1） the liquid limit, plastic limit would decrease, however the unconfined compressive strength would increase as the amount of WIBA increased, when the amount was about a half, the unconfined compressive strength would be over 60kPa; （2） For pure sludge, the maximum dry density was 7.9 kN/m3, optimum water content was 66%; （3） With the amount of WIBA increased, the optimum water content decreased and maximum dry density increased. Finally, the formulas to predict the strength were put forward, and could be used to calculate the strength with different WIBA amount and solidification age.
作者
崔广强
孙家国
CUI Guangqiang SUN Jiaguo(College of Engineering, Fujian Jiangxia University, Fuzhou, Fujian 350108 College of Civil Engineering, Wuyi University, Wuyishan,Fujian 354300)
出处
《武夷学院学报》
2016年第9期57-60,共4页
Journal of Wuyi University
基金
福建省自然科学基金项目(2014J01172)
福建江夏学院青年科研人才培育基金项目(JXZ2015004)
关键词
垃圾焚烧底灰
污泥
固化
填埋
waste incineration bottom ash
sludge
solidification
landfill
