The Use of Geogrids in Mitigating Pavement Defects on Roads Built over Expansive Soils

This study was conducted to investigate the potential benefits of using geogrids in mitigating pavement defects notably roughness and longitudinal cracking on pavements built over expansive soils. The seasonal changes soils (periodic wetting drying) cause detrimental effects overlying road pavements. Such behavior simulated a controlled laboratory environment through allowing cyclic drying an soil underlying section. shrink/swell subgrade were examined monitoring its change moisture, measuring deformation experimental suggested that geogrid layer reinforced section can reduce surface differential shrinking swelling resulting from by factor 2 3 respectively comparison unreinforced Given oedometer test which is typically used predict known overpredict in-situ swell, program also investigated quantitatively extent overestimate behaviour real-field scenarios. It found percent swell ranging between 10 depending upon period has been contact with water.