摘要
锌是一种常见的重金属污染物,淤泥被锌污染后会对自然环境造成危害。以15%水泥为基准外掺剂,选用不同配比的水泥矿渣来固化锌污染淤泥,分析矿渣对水泥土的固化效果。通过无侧限抗压强度试验、淋滤试验和电镜扫描试验分别研究固化土的力学强度特性、固化稳定效果和微观结构特征。试验结果表明:水泥矿渣固化锌污染淤泥的抗压强度随着外掺剂含量和龄期的增长而增大;相同的外掺剂含量水泥加矿渣的固化效果优于单掺水泥;对于5 000 mg/kg及以下的锌污染淤泥固化稳定效果良好;外掺剂K2(15%水泥+10%矿渣)对锌污染淤泥的固化稳定效果相对较好。
Zinc is a common heavy metal pollutant. The environment will be damaged by the sludge contaminated by zinc. The paper analyzed the curing effect of slag on cement-soil by using different mixture ratios for cement-slag based on 15% cement standard additive. Through the unconfined compressive strength test,leaching experiment,and scanning electron microscopy; the paper analyzed the mechanical strength characteristics,stabilization effect of solidified and microstructure characteristics respectively. The results showed that the compressive strength of zinc polluted sludge cured by cement-slag increased with the increase of additive content and its age. The solidification effect of cement-slag and additive was better than single additive cement. Also,the stabilization and curing effects were better when the zinc polluted sludge with content was equal or less than 5 000 mg/kg. The effect of K2（ 15% cement ＋ 10% slag） on the solidification stability of zinc contaminated sludge was relatively good.
出处
《工业建筑》
CSCD
北大核心
2017年第8期89-94,共6页
Industrial Construction
基金
国家自然科学基金项目(51508109)
广东省自然科学基金(2016A030313692)
关键词
水泥
矿渣
锌污染淤泥
强度
淋滤试验
电镜扫描
cement
slag
zinc contaminated sludge
strength
leaching experiment
scanning electron microscopy
作者简介
梁仕华，男，1976年出生，博士，副教授。电子信箱：shihua_l@126．com
