Loess resources are abundant and widely distributed in the world, but insufficient strength and water-stability cannot meet the requirements of subgrade soil. Ordinary soil reinforcement technology does not apply to loess. This paper provides a theoretical reference for the application of copolymers as soil curing agents in pavement construction and the treatment of loess. The effect of CSS (cement stabilized soil) specimens and CESS (cement-EVA stabilized soil) specimens were studied to evaluate whether cement-EVA stabilized loess can be used as subgrade soil when adding cement and EVA (ethylene-vinyl acetate copolymer) as a soil curing agent to the loess from the perspective of chemically stabilized soil. The performance of cement-EVA stabilized loess was evaluated through the analysis of mechanical properties, damage resistance, water-stability, anti-freezing ability, dry shrinkage and analysis, and micro-morphology of CSS specimens and CESS specimens. The results show that: the addition of EVA significantly improved the properties of cement stabilized loess. The amount of 300 mL/m³ EVA increased the 28 d strength of CESS by about 26.4%, and as the amount of EVA increased, the strength gradually increased, but the growth rate gradually decreased. The addition of EVA made the specimens more resistant to load and water damage. The toughness index VI of the CESS specimens with 600 mL/m³ EVA was increased by 20%–30% compared with the CSS specimens, and the water stability coefficient K was increased by 5%–10%, and the frost resistance coefficient AFA was increased by about 20%–30%. In addition, the addition of EVA slowed down the shrinkage of cement stabilized loess, and the 30 d drying shrinkage of the CESS specimen was reduced by about 30%. It can be seen in the scanning electron microscope test that with the increase of EVA, cement hydration products gradually increased, pores gradually decreased, and the structure was dense. This means adding EVA to cement stabilized loess can cause chemical reactions to form gels, which surround soil particles, eliminates the pore among the soil particles. The price of EVA is lower and the dosage is little, which can reduce the cost of the entire life of the pavement. In general, EVA is an effective curing agent for strengthening loess and its practical application in the pavement can be further studied in the future.

黄土资源丰富，分布广泛，但强度和水稳定性不足，不能满足路基土的要求。普通土壤加固技术不适用于黄土。为共聚物作为土壤固化剂在路面施工及黄土处理中的应用提供理论参考。研究了CSS（水泥稳定土）试件和CESS（水泥-EVA稳定土）试件的效果，以评估在添加水泥和EVA（乙烯-醋酸乙烯酯共聚物）作为路基土时，水泥-EVA稳定黄土是否可以作为路基土。从化学稳定土角度看黄土固化剂。通过力学性能、抗损伤性、水稳定性、CSS试件和CESS试件的抗冻能力、干缩及分析、微观形貌。结果表明：EVA的加入显着改善了水泥稳定黄土的性能。用量 300 mL/m³ EVA使CESS的28 d强度提高了约26.4%，随着EVA用量的增加，强度逐渐增加，但增长率逐渐下降。EVA 的添加使样品更能抵抗载荷和水的破坏。^{600 mL/m 3} EVA CESS试件的韧性指数VI较CSS试件提高20%~30%，水稳系数K提高5%~10%，抗冻系数AFA提高增加约 20%–30%。此外，EVA的加入减缓了水泥稳定黄土的收缩，CESS试件的30 d干燥收缩降低了约30%。扫描电镜测试可以看出，随着EVA的增加，水泥水化产物逐渐增多，孔隙逐渐减少，结构致密。这意味着在水泥稳定的黄土中添加 EVA 会引起化学反应形成凝胶，凝胶包围土壤颗粒，消除土壤颗粒之间的孔隙。EVA价格较低，用量少，可降低路面全寿命成本。总的来说，EVA是一种有效的黄土加固固化剂，其在路面的实际应用有待进一步研究。