Experimental Study of the Usage of Combined Biopolymer and Plants in Reinforcing the Clayey Soil Exposed to Acidic and Alkaline Contaminations

In the last decade, biopolymers have been extensively studied, showing a great potential in soil reinforcement and promotion of vegetation growth with limited environmental impact. this paper, reinforcing method combined biopolymer (xanthan gum, XG) plants (oat) was proposed to strengthen clayey different pore fluid pH values. A series laboratory tests were conducted, mainly including plant cultivation direct shear tests. It found that oats grew better neutral, weakly acidic, alkaline environments. Both 0.25% XG 0.50% mostly promoted growth, also led higher strength. An excessive content (e.g., 0.75% 1.00%) may lead formation hard XG–soil matrix, preventing oat therefore resulting lower The XG–oat combination be more effective treating soils acidic Furthermore, is able reduce types contents heavy metal elements soil. Therefore, we suggest using improve stability geotechnical performances shallow slopes are exposed contamination.