Nano-zeolite was used in the present study as a substitute for a part of lime and then inclusion polypropylene fiber in stabilized soil matrix to develop the soil stabilization method with lime and to improve the efficiency of this technique. In so doing, specimens of soft soil with 5, 10 and 15% of modifier L (lime), LZ (lime-nano-zeolite) and LZF (lime-nano-zeolite-fiber) were prepared, and were subjected to 1–7 wet-dry cycles. Then, microstructure and macrostructure tests were performed on the specimens. The results of the analyses, indicated that the optimal replacement of lime with nano-zeolite would be 40%, and the optimal amount of polypropylene fibers inclusion would be 1% in the stabilized soil matrix. Major reduction in lime consumption would yield a 40% increase in compressive strength and a 21% improvement in durability. The results also showed that the specimen containing 15%LZF would have excellent durability against environmental conditions and very good performance in terms of unconfined compressive strength (UCS), tensile strength and weight loss. Before and after applying 7 wet-dry cycles, the UCS increased by 39% and 16%, respectively. The results of this study indicate that LZF modifier is a suitable option for lime-based stabilization in areas under wet-dry cycles.

本研究使用纳米沸石代替部分石灰，然后将聚丙烯纤维掺入稳定土壤基质中，以开发石灰土壤稳定方法并提高该技术的效率。在此过程中，制备了含有 5%、10% 和 15% 的改性剂 L（石灰）、LZ（石灰-纳米沸石）和 LZF（石灰-纳米沸石-纤维）的软土样品，并进行了 1- 7 次干湿循环。然后，对试样进行显微组织和宏观结构测试。分析结果表明，纳米沸石对石灰的最佳替代量为40%，聚丙烯纤维在稳定土壤基质中的最佳掺入量为1%。石灰消耗量的大幅减少将使抗压强度提高 40%，耐久性提高 21%。结果还表明，含有 15% LZF 的试样对环境条件具有出色的耐久性，并且在无侧限抗压强度 (UCS)、拉伸强度和重量损失方面具有非常好的性能。在应用 7 次干湿循环前后，UCS 分别增加了 39% 和 16%。这项研究的结果表明，LZF 改性剂是在干湿循环下的地区进行石灰基稳定的合适选择。