DFI - PFSF Piling & Ground Improvement Conference 2022 Proceedings, (DFI and PFSF)
Influence of Freeze-Thaw Cycles on Strength and Heavy Metal Leaching Performance of Petroleum Drilling Mud Stabilized by Waste
Yin Cheng, Jing Chen, Yafei Li, Miaomiao Tian, Jun Shen and Hao Yu
Vast amounts of waste drilling mud containing heavy metals is produced during oil drilling process, which causes great pollution to the environment. Therefore, it needs to be treated until it is harmless. This study uses industrial waste and Portland Cement stabilized waste drilling mud; the unconfined compression strength, leaching amount of Pb/sup 2+/ and Cr/sup 6+/ ions, and pore size of the stabilized soil were tested at different times during freezing-thawing cycles. The antifreeze performance of the stabilized drilling mud with industrial waste is discussed. The results show that the strength of the stabilized soil decreases with an increase in the number of freeze-thaw cycles. The strength loss of the stabilized soil after freeze-thaw cycles can be effectively reduced by increasing the industrial waste content, especially the content of phosphogypsum in the stabilizer component. Pb/sup 2+/ ions and Cr/sup 6+/ ions can be effectively stabilized by industrial waste. The results of the pores test prove that the compactness of stabilized soil solidified by industrial waste residue is greater than that of cement alone.
|article #3834; publication #1076 (IC-2021)|