Abstract:
This paper discusses efforts made by past researchers to steady the expansive (problematic) soils using mechanical and chemical techniques - specifically with EPS beads, lime and fly ash. Administering swelling of problematic soils is critical for civil engineers to prevent structural distress. This paper summarizes studies on reduction of swelling potential using EPS, lime and fly ash individually. Chemical stabilization with lime and fly ash are conventional methods for expansive soil stabilization, with known merits and demerits. This paper explores the suitability of different materials under various conditions and stabilization mechanisms, including cation exchange, flocculation, and pozzolanic reactions. The degree of stabilization is influenced by various factors such as the type and amount of additives, soil mineralogy, curing temperature, moisture content during molding, and the presence of nano-silica, organic matter, and sulfates. Additionally, expanded polystyrene (EPS) improves structural integrity by compressing when surrounded clay swells, reducing overall swelling. Thus, EPS addresses limitations of chemicals by mechanical means. Combining EPS, lime and fly ash creates a customized system promoting efficient, long-lasting, cost-effective and eco-friendly soil stabilization. Chemicals address EPS limitations like poor stabilization. This paper benefits civil engineers seeking to control expansive soil swelling and prevent structural distress. It indicates potential of an EPS-lime-fly ash system and concludes by identifying research gaps for further work on such combinatorial stabilizer systems.
摘要:
本文讨论了过去的研究人员为使用机械和化学技术稳定膨胀(有问题的)土壤所做的努力-特别是EPS珠,石灰和粉煤灰。管理有问题的土壤的膨胀对于土木工程师防止结构损坏至关重要。本文总结了使用EPS降低膨胀电位的研究,石灰和粉煤灰分别。用石灰和粉煤灰进行化学稳定是膨胀土稳定的常规方法,有已知的优点和缺点。本文探讨了不同材料在各种条件下的适用性和稳定机理,包括阳离子交换,絮凝,和火山灰反应。稳定程度受各种因素的影响,如添加剂的类型和用量,土壤矿物学,固化温度,成型过程中的水分含量,还有纳米二氧化硅的存在,有机物,和硫酸盐.此外,膨胀聚苯乙烯(EPS)通过在包围的粘土膨胀时压缩来改善结构完整性,减少整体肿胀。因此,EPS通过机械手段解决化学品的限制。组合EPS,石灰和粉煤灰创造了一个定制的系统,促进高效,持久的,具有成本效益和生态友好的土壤稳定。化学品解决了EPS的局限性,如稳定性差。本文有利于土木工程师寻求控制膨胀土膨胀和防止结构破坏。它表明了EPS-石灰-粉煤灰系统的潜力,并通过确定此类组合稳定剂系统进一步工作的研究空白来得出结论。