Improvement of Kaolinite Clay Subgrade Using Coir Fiber Waste

Abstract-Since highways are widely used modes, it is necessary that it should be maintained properly. Subgrade being the support for the whole pavement, it needs the utmost care in its construction. Many suggestions have been put forward by various scientists to improve the subgrade. The usually adopted methods are stabilization methods. This paper deals with the improvement of properties of kaolinite clay having very low CBR as a subgrade material. Improvement of strength of kaolinite clay with addition of quarry dust and coir fiber waste was studied. The test results show that no marginal improvement was observed dueto the addition of coir fiber waste alone. Hence coir fiber waste along with quarry dust was tried and resulted in considerable improvement in the strength of kaolinite clay.