Effect of cement treatment on soil non-woven geotextile

It is imperative that any soil improvement technique can considerably aectthe soil media mechanical behavior. however, considering the recent researches, it canbe concluded that a combined study on the eect of cement treatment on soil-geotextileinterfacial shear strength parameters has almost been neglected. thus, the main objectiveof this study is to ll this research gap with the main focus on a selected site in shirazcity, iran. in this regard, shear strength parameters of untreated and cement treated soilsamples have been acquired by traditional and modied direct shear tests apparatuses. theresults indicate that at high cement contents, the soil-geotextile interfacial shear strengthincreases with an observed behavior similar to over consolidated soils. while up to 1% ofcement treatment did not improve the properties, adding 5% and 10% of cement increasedboth friction angle and cohesion of the soil considerably. complementary microscopicevaluation of the interface indicated that the interfacial soil-geotextile shear strength ishighly dependent upon the soil particles size distribution and specially its nes content.finally, the numerical modeling of an illustrative reinforced soil structure revealed thatknowing the state of stress is a prerequisite to any selection of the soil improvement zone.