رسائل ماجيستير
English
2010
Reinforced soil by using kenaf fibers
Alrufai Adam Emam Osman, Mohammed Ahmed Osman
معهد بحوث البناء والطرق-جامعة الخرطوم · السودان
The objective of this research is to investigate the beneficial effects ofreinforcing silty sand soil specimens using randomly distributed kenaf fibersof lengths ranged between 20-25 mm. The strength and deformationcharacteristics were examined in the laboratory under three loadingconditions mainly, Proctor, California Bearing Ratio and UnconfinedCompression Tests.For research objectives, the soil used in the investigation was sourced fromSoba east Khartoum and the kenaf fibers were purchased from the localmarket. The Optimum Moisture Content (OMC), California Bearing Ratio(CBR) and Unconfined Compression Strength (UCS) were investigated andthereby, the optimum value of kenaf fiber content has been determined.The results of tests indicated that CBR Values of reinforced silty sand were5.3 times their unreinforced value and the inclusion of kenaf fibers increasedthe unconfined compressive strength and residual strength of the specimensby approximately 88% and can change significantly the brittle behavior ofthe silty sand soil to more ductile one. Also, the results indicated that; thereinforced soils exhibited higher failure stresses in unconfined compressionstrength tests than the unreinforced ones due to the bond developed betweensoil particles and the fiber.The use of the kenaf fiber for soil reinforcement means that in many areas ofthe world there is a readily available, effective local source of material forimproving the strength of locally available soils that can be used in soilstabilization.