Laboratory Analysis of the Interface Shear Characteristics of Chemically Treated Coir Geotextiles and Soil Interface

The performance of geotextiles reinforced soil structures is greatly impacted by the interface behaviour at the soil-geotextiles interface. Two distinct woven and nonwoven coir geotextiles were used in the current study to examine the shear stress versus shear displacement behaviour at clay-geotextile interface and sand- geotextile interface by using the direct shear test. To assess the impact of chemical treatment on the interface shear strength of treated coir geotextile-clay/sand interface, adhesion, and interface friction angle was measured. Brunauer–Emmett–Teller (BET) technique was used to analyze how chemical treatment affects the surface area of coir fiber. A simultaneous thermal analyser was used to conduct differential scanning calorimetric (DSC) analysis on untreated and treated coir geotextiles.