https://orcid.org/0000-0002-2427-8512
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ABSTRACT
Soft soil as a pavement subgrade leads to early pavement failure or increased pavement thickness. Ground improvement techniques have been used as a solution to this. The published studies on coir waste treated soft soil depict that the adverse volume change characteristics of clayey soils are mitigated by the resistance offered by coir waste. However, on analyzing, it can be seen that the engineering properties of coir waste treated soil are on a lower side. Hence, an additional stabilizer lime was used in combination with coir waste to investigate the enhancement in strength and reduction in deformation behavior. This paper presents the experimental studies carried out to investigate how the addition of lime to soil treated with coir waste affects various aspects like compression behavior, undrained shear strength, and deformation behavior. The degree of expansion and effect of the curing period was also analyzed and an optimized design model was arrived to quantify the strength in terms of lime content added to the coir waste treated soil and its curing period. Design charts for pavement thickness over treated subgrade soil were also developed.
抽象
软土作为路面路基，会导致路面早期破坏或增加路面厚度. 地基改良技术被用来解决这一问题. 已发表的椰壳废料处理软土的研究表明，椰壳废料提供的阻力可减轻粘性土的不利体积变化特性. 但是，通过分析可以看出，椰壳废料处理土的工程性质偏低. 因此，使用额外的稳定剂石灰与椰壳废料结合来研究强度的提高和变形行为的降低. 本文通过试验研究了在椰壳废料处理土中添加石灰对土的压缩性能、不排水抗剪强度和变形性能的影响. 分析了膨胀度和养护期对强度的影响，提出了以添加石灰量和养护期为指标的强度优化设计模型. 此外，还编制了处理路基土上路面厚度的设计图表.
Acknowledgments
The authors acknowledge the Kerala State Council for Science, Technology and Environment (KSCSTE), Kerala, India, Transportation Research Centre (TRC), College of Engineering Trivandrum, and the Centre for Engineering Research and Development (CERD), Government of Kerala, India for funding this research work.