M Vishweshwaran, Sujatha Evangelin Ramani
School of Civil Engineering, SASTRA Deemed University, Thanjavur 613401, India.
Polymers (Basel). 2022 Jul 13;14(14):2850. doi: 10.3390/polym14142850.
Beta glucan (β-Glucan), a polysaccharide biopolymer, is used to improve the subgrade strength of clayey soils in an attempt to advocate a sustainable, carbon-neutral, and eco-friendly stabilizer. A design thickness catalog was developed for a three-layered flexible pavement using 3D finite element analysis (FEA) and layered elastic analysis. The analyses were performed for β-glucan-treated fine-grained soils with varying traffic intensities based on a mechanistic design philosophy conforming to IRC: 37-2018. Genetic programming (GP) was employed to obtain equations governing the rutting and fatigue failure in pavements. Thirty-nine datasets were used in the determination and analysis of critical strains governing the failure of a flexible pavement. Energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Zetasizer analysis, and pH tests of the β-glucan-treated soil revealed the mechanism of strength improvement of the fine-grained soils. The savings in cost for a 1 km stretch of the pavement were estimated to be 14.3%.
β-葡聚糖是一种多糖生物聚合物，被用于提高黏性土壤的路基强度，以此倡导一种可持续、碳中和且环保的稳定剂。利用三维有限元分析（FEA）和层状弹性分析，为三层柔性路面编制了设计厚度目录。基于符合IRC: 37-2018的力学设计理念，对不同交通强度下经β-葡聚糖处理的细粒土进行了分析。采用遗传规划（GP）来获取控制路面车辙和疲劳失效的方程。39个数据集被用于确定和分析控制柔性路面失效的临界应变。对经β-葡聚糖处理的土壤进行的能量色散X射线光谱（EDS）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、Zetasizer分析和pH测试揭示了细粒土强度提高的机制。据估计，1公里长的路面成本节约了14.3%。
