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针对油基钻屑热解吸处理过程中产生的危险废物残渣,采用废渣基固化剂CS对其进行了固化处理。考察了CS掺量对固化体无侧限抗压强度、水稳性、抗冻性和污染物浸出特性的影响,并利用XRD、SEM和MIP等测试方法,讨论了固化剂对热解油基钻屑的固化机理。结果表明:CS作为固化剂固化热解油基钻屑,其抗压强度及水稳系数(大于0.87)均优于参比样(掺水泥固化体);冻融循环15次后,掺CS热解油基钻屑固化体仍能保持较高的强度值,试件质量损失较小且完整性良好;CS掺量为6%~15%时,热解油基钻屑固化体浸出液成分达到GB 8978-1996Ⅰ级的要求;CS固化处理后,热解油基钻屑固化体中生成了大量C-S-H凝胶和少量AFt,使其基体结构更为致密,明显提高了固化体抗压强度、水稳性和抗冻性,同时能抑制热解油基钻屑中污染物的浸出。
In view of the hazardous waste residue generated during thermal desorption of oil-based drill cuttings, the waste-based curing agent CS was used to cure it. The influence of the amount of CS on the unconfined compressive strength, water stability, frost resistance and pollutant leaching characteristics was investigated. The effects of curing agent on the pyrolysis oil base Cuttings curing mechanism. The results showed that CS as curing agent solidified pyrolysis oil-based drilling cuttings, the compressive strength and water stability coefficient (greater than 0.87) are better than the reference sample (cement-cured cement body); freeze-thaw cycle after 15 times, CS-doped heat Oil-based drill cuttings cured body can still maintain a high strength value, the specimen mass loss less integrity and good; CS dosage of 6% to 15%, pyrolysis oil-based drill cuttings solids leachate composition reaches GB 8978-1996 Class I requirements. After CS curing, a large amount of CSH gel and a small amount of AFt were formed in the cured oil-based drill cuttings, making the matrix structure more compact and significantly improving the compressive strength, water stability Sexual and frost resistance, while inhibiting the leaching of contaminants in pyrolysis oil-based cuttings.