为提高废弃黏土利用率，选用水泥、碱激发剂、硅质固废材料、硫酸盐类固废材料组成的复合类固化剂对某工程废弃黏土进行固化处理，根据无侧限抗压强度（unconfined compressive strength, UCS）试验、水稳性试验、X射线衍射试验以及扫描电子显微镜（scanning electron microscope, SEM）试验，研究了该复合类固化剂固化废弃黏土的力学行为及加固机理。研究结果表明：固化剂掺量为10% ~ 12%时固化黏土的效果较好，且固化黏土的水稳性系数均大于80%；当固化剂掺量为12%，固化黏土为28 d时，固化黏土无侧限抗压强度为2.45 MPa，是7 d时固化黏土无侧限抗压强度（1.05 MPa）的2.33倍；固化黏土中生成的大量水化硅（铝）酸钙、钙矾石等水化产物，通过改善土体内部微观孔隙结构并加强团粒间的胶结作用提高了固化黏土的性能。该复合类固化剂可有效加固废弃黏土，提高其资源化利用率，具有广泛的应用价值。

To improve the utilization rate of waste clay, a composite curing agent composed of cement, alkali excitation agent, siliceous solid waste material and sulfate solid waste material was used to cure a waste clay. Unconfined compressive strength test (UCS), water stability test, X-ray diffraction test and scanning electron microscope(SEM) test were carried out to capture the mechanical behavior and reinforcing mechanism of the solidified clay. The results show that there is a significant solidification effect on the clay when the dosage of curing agent is from 10% to 12%, and the water stability coefficient of solidified clay is larger than 80%. The UCS of the solidified clay with 12% curing agent content is 2.45 MPa after curing for 28 days, which is 2.33 times the UCS of the solidified clay at a curing time of 7 days (1.05 MPa). A large number of hydration products such as calcium silicate (aluminate) hydrate and ettringite produced in the solidified clay can improve the performance of solidified soil by improving the micro-pore structure of soil and strengthening the cementation between aggregates. The present research can provide reference for the resource utilization of waste clay.