Economic Evaluation of Flexible Pavement with respect to Fly ash and Lime Stabilization of Expansive sub-grade soil in Gujarat


Author (s):

  1. R.R. Tank, Darshan Institute of Engineering & Technology, Rajkot, Gujarat, INDIA, rrtank21@gmail.com
  2. U.J. Solanki, Darshan Institute of Engineering & Technology, Rajkot, Gujarat, INDIA

Abstract:

This paper based on literature review on California Bearing Ratio behaviour of sub-grade soil with respect to stabilization agent added to evaluate economic cost with respect to pavement structure based on the sub-grade stabilization. In order to achieve the above mentioned objectives, it is required to study the geotechnical properties of the expansive soil and the effects of stabilizers i.e. by adding fly ash, lime and combination of both on the properties of expansive soil, especially CBR behaviour, solely based on the literature experiments has been studied and the comparative analysis is carried out between the stabilized and non-stabilized flexible pavement from the economic point of view. As per economic point of view the best option of stabilization is found that the Fly ash plus Lime, combination of two stabilizers are the best option for the expansive sub grade soil stabilization with optimum Lime : Fly ash - 4 : 2 % respectively, Lime stabilization is the second option for the expansive sub grade soil stabilization with optimum 6% of lime, Fly ash stabilization is the third option for the expansive sub grade soil stabilization with optimum 15% fly ash.

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