No abstract

The primary objective of this research work is to study the effect of surface treated coir geotextiles on the bearing behaviour of sand overlying clay model with geotextiles at the interface. Two woven and two non woven coir geotextiles were treated with bitumen emulsion and unsaturated polyester resin. The surface morphology and thermal stability were investigated by scanning electron micrograph and simultaneous thermal analyser respectively. The bearing ratio of sand overlying clay increased with treated woven/non woven coir geotextiles at the interface in soaked and unsoaked condition. The bearing ratio was higher for treated/untreated and woven/non woven coir geotextiles at the interface in unsoaked condition as compared to soaked condition. The chemical treatment improved the thermal stability of surface treated coir geotextiles through physical and chemical changes.

The present study investigates the effects of chemical treatment in characterising the physicomechanical properties of coir geotextiles. Two woven and two non woven coir geotextiles were used in this study. All four types of coir geotextiles were chemically treated with unsaturated polyester resin and bitumen emulsion. The results reveal that the tensile strength of untreated and treated woven and nonwoven coir geotextiles was higher in the warp/machine direction as compared to the weft/cross-machine direction respectively. The chemical treatment increased the tensile strength and decreased the tensile elongation of both woven and non woven coir geotextiles respectively. The chemical treatment modifies the surface morphology of both the woven and nonwoven coir geotextiles.