Long-term material dependency on natural resources has caused a heavy toll on the environment and biodiversity of natural systems. To explore the effectiveness of the usage of unconventional materials in geotechnical applications, an attempt is made towards the application of calcium lignosulphonate, a by-product of the paper industry in soil stabilization techniques in the place of conventional additives such as lime, cement and fly ash. These materials can harm the environment and also increase the carbon footprint due to emissions during their production. The present study focuses on stabilizing a potential expansive soil by using lignosulphonate (LS) in proportions ranging from 0.5% to 3% and 6%. The strength and swell parameters of treated and untreated soil are evaluated under curing periods ranging from 0 to 28 days. The strength aspects of the soil-lignosulphonate composites are evaluated under different moisture states and also after allowing a longer interaction period between LS and soil through the pre-compaction mellowing process. The interaction mechanism is also substantiated with microstructural studies. An average strength improvement of the order of 2 is depicted by the treated soil for an optimum LS content of 1.5%. The treated soil also showed a considerable decrease in swell potential and swell pressure, than untreated soil. The manuscript primarily focuses on the behaviour of LS-amended expansive soil in terms of strength and swelling characteristics and the technique to augment the interaction mechanism of the LS-soil composites.

对自然资源的长期物质依赖对自然系统的环境和生物多样性造成了沉重的损失。为探索在岩土工程中使用非常规材料的有效性，尝试使用造纸工业的副产品木质素磺酸钙代替传统添加剂（如石灰、水泥和苍蝇）在土壤稳定技术中的应用灰。这些材料可能会危害环境，还会因生产过程中的排放而增加碳足迹。本研究的重点是通过使用 0.5% 至 3% 和 6% 的木质素磺酸盐 (LS) 来稳定潜在的膨胀土。处理和未处理土壤的强度和膨胀参数在 0 到 28 天的固化周期内进行评估。土壤-木质素磺酸盐复合材料的强度方面在不同水分状态下进行评估，并且在通过预压实软化过程允许 LS 和土壤之间有更长的相互作用时间之后进行评估。微观结构研究也证实了相互作用机制。对于 1.5% 的最佳 LS 含量，处理过的土壤描述了平均强度提高 2 倍。与未经处理的土壤相比，经处理的土壤在膨胀势和膨胀压力方面也显示出相当大的降低。手稿主要集中在 LS 修正膨胀土在强度和膨胀特性方面的行为以及增强 LS 土壤复合材料相互作用机制的技术。