| 篇名： | Mechanical Properties of Cement-Solidified Oily Sludge | 论文类型： | SCI |
| 刊名： | Environmental Engineering Science 2017,34(8) |
| 作者： | Zizeng Lin;Zheng Wang;Yafeng Hu;Yali Liu;Jian Xu | 发表时间： | 2017-01-27 |
| 关键词： | heavy metals;mechanism;oily sludge;physical strength | PDF文档： | 查看/下载 |
| 摘要： | In this study, the physical strength and mechanical properties of oily sludge treated through stabilization/ solidification (S/S) with Portland cement were investigated. S/S treatment effectively immobilized heavy metals and had a relatively small effect on hydrocarbons; 1:4 was an appropriate oily sludge to cement ratio in terms of physical strength, hydrocarbon leaching, and heavy metal immobilization. Porosity of the S/S samples exhibited a negative correlation with physical strength. With 20?21% considered the optimal range, the pore size dis- tribution had a single peak and the pore diameter was less than 50lm. X-ray diffractometry and scanning electron microscopy analyses showed that hydration of Portland cement was a sequential process: C3S was fast, while C2S hydrated more slowly and had a substantial influence on the final strength of the sample. Formation of C?S?H and AFt may be closely related to heavy metal immobilization. |
