生物高聚物
风积作用
胶结(地质)
黄原胶
土壤结皮
侵蚀控制
土壤稳定
干旱
腐蚀
材料科学
土壤科学
地质学
环境科学
土壤水分
岩土工程
复合材料
水泥
地貌学
流变学
聚合物
古生物学
作者
Rituraj Devrani,Anant Aishwarya Dubey,K. Ravi,Lingaraj Sahoo
标识
DOI:10.1016/j.jaridenv.2020.104433
摘要
This study investigates soil stabilization through two soil strengthening techniques, specifically; Bio-cementation through Microbial induced calcite precipitation (MICP) and Bio-polymerization using Xanthan gum for aeolian erosion control applications. The performances of these techniques were evaluated in terms of improvement in Threshold friction velocity (TFV), soil mass loss (%), and soil crust thickness formed with different levels of the treatment by conducting a series of experiments in the laboratory-scale wind tunnel and the microstructural observations with the help of FESEM and X-ray diffraction techniques. The results from wind erosion studies exhibited an improvement in TFV from 20 km/h for untreated to 45 km/h for MICP and biopolymer treated sand. A reduction in the soil mass loss from 75.23% for untreated to as least as 0% with both MICP and biopolymer treatment was observed. The results also indicated that the concentration of urea-cacl2 and biopolymer both played a critical role in soil improvement in both treatment methods. In MICP treated soil, the maximum wind speed of 45 km/h was encountered as TFV with 0.5M urea-cacl2. Whereas the TFV of biopolymer treated soil encountered the maximum wind speed of 45 km/h with a minimum of 0.25% of Xanthan Gum biopolymer solution.
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