摘要
针对污染土的水泥固化稳定法修复技术,对水泥固化稳定重金属铅污染土的强度预测方法进行了研究.水泥固化含铅污染土强度由室内无侧限抗压强度试验所得,试验所用污染土通过人工制备而成,考虑了1.0×102,1.0×103,1.0×104,3.0×104mg/kg四种质量比和5%,7.5%,10%三种水泥掺量.结果表明:不同龄期水泥固化含铅污染土的无侧限抗压强度间大致呈线性关系,而2个不同水泥掺入比水泥固化含铅污染土的无侧限抗压强度比值与水泥掺入比呈幂函数关系;通过对不同配合比、不同龄期试样强度的进一步拟合分析,得到了根据某一龄期强度预测另一龄期强度的经验公式和根据某一水泥掺量的强度预测另一水泥掺量强度的经验公式,以上公式同时适用于普通水泥固化土和含铅水泥固化污染土.
Using cement as a binder to mix with contaminated soils is one of the widely used technologies for soil remediation.The experience formulas for the unconfined compressive strength prediction of cement stabilized/solidified heavy metal contaminated soils are studied.The strength data used for analysis are from unconfined compressive tests conducted in the laboratory.The heavy metal contaminated soils are prepared artificially by adding lead nitrate as a source of pollutant at four different lead contents of 1.0×10^2,1.0×10^3,1.0×10^4 and 3.0×10^4 mg/kg（dry soil weight basis） and three different cement contents 5%,7.5% and 10%.The results of the unconfined compressive strength tests show that there is a linear relationship between the strength of cement treated lead contaminated soils at different curings,and a power function relationship between the cement content ratios and the ration of strength corresponding to the cement content.The experience formulas are further concluded which can predict the strengths at different curing times or with different cement content.These formulas are both appropriate for normal cemented soils and cement treated lead contaminated soils.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第3期609-613,共5页
Journal of Southeast University：Natural Science Edition
基金
教育部博士点基金资助项目(20060286031)
国家自然科学基金资助项目(50878052
40972173)
教育部重点实验室开放课题基金资助项目(KLE-TJGE-0801)
关键词
水泥
污染土
重金属
铅
无侧限抗压强度
龄期
预测
cement
contaminated soil
heavy metal
lead
unconfined compressive strength
curing time
prediction
