International Journal of Innovative Technology and Research
Abstract
A well-developed road network forms an integral part of the development of any nation. The lack of resources available and their ever-increasing cost of materials and energy have motivated highway engineers to explore new alternatives in building new roads and rehabilitating the existing ones. A weak sub-grade has been and still is one of major concerns to pavement design engineers due to its potential contribution to permanent deformation in flexible pavements, particularly in low-volume thin pavements. In such situations, the natural condition of poor sub-grade soils needs to be improved by suitable modification techniques to meet project requirements. Improving the strength of the sub-grade soils using additives is one such alternative. In the present study the performance of nonwoven geo-textile, interfaced between soft sub-grade and unbound gravel in an unpaved flexible pavement system, is carried out experimentally, utilising the California Bearing Ratio (CBR) testing arrangement. In order to evaluate the performance of the reinforcement the CBR load – penetration graphs are drawn. The relation of both soft sub-grade soil and soft sub-grade geo-textile soil separately. Soil properties and variations of load carrying capacity is found using CBR Tests. Optimum percentage of fibers and optimum size of geo-textile is also found using CBR Test
