对水泥土试样进行了不同次数的冻融-硫酸盐腐蚀循环处理，采用宏观形貌观察、化学成分分析、力学性能测试和孔隙率测量等方法研究了盐-冻作用对试样力学性能和结构的影响规律。结果表明:在盐-冻耦合作用下，由于化学反应导致水泥凝胶体减少，水泥土的腐蚀程度逐渐增加；试样的力学性能随循环次数的增加呈衰减趋势，且下降速率先快后慢；无侧限抗压强度与孔隙体积具有良好的负线性关系。在冻融-硫酸盐腐蚀循环的作用下，水泥土力学性能劣化的根本原因是其微结构发生腐蚀损伤。

Cement-soil samples were treated by different freeze-thaw-sulfate corrosion cycles. The effects of salt-freezing on the mechanical properties and structure of the samples were studied by means of macro-morphological observation, chemical composition analysis, mechanical property testing and porosity measurement. The results showed that under the salt-freeze coupling action, the chemical reaction led to the decrease of cement gel and the gradual increase of the corrosion degree of cement-soil. The mechanical properties of the samples showed a decreasing trend with the increase of the number of cycles, and the decline rate was fast at first and then slow. The unconfined compressive strength had a good negative linear relationship with the pore volume. Under the action of freeze-thaw-sulfate corrosion cycle, the fundamental reason for the deterioration of the mechanical properties of cement-soil was the corrosion damage to its microstructure.