Subgrade is the compacted supporting soil on which number of building structure lies. So geotextiles are using as a
successful application in soil stabilization for improving the subgrade soil properties. The application of geotextiles in structural
facilities is mainly concentrated on the raising the strength of structure and also does not address the issue of sustainability of
raw materials used. Natural geotextiles are economic, biodegradable and ecofriendly. In India, for evaluating the stability of
the soil subgrade CBR test is recommended as per IRC 37-2001 design code in designing the flexible pavements. Use of coir and
bamboo is generally preferred to improve strength of soft soil subgrade for flexible pavements. Non-woven coir and bamboo
sticks were interfaced with soil individually. CBR for soil alone is less as compared to those with soil and geotextiles together.
