Design of Flexible Pavement By Black Cotton Soil And 20% Sugarcane Bagasse Ash With Coir Fibre (AR – 60)

Abstract

According to IRC recommendation, the California bearing ratio (CBR) value of subgrade is used for design
of flexible pavements. The design of pavement may affect by the material which is used as pavement material. Black
Cotton soil is expansive soil which expand when it contacts with water and this is the major reason of failure of black
cotton soil strata. The engineering properties of black cotton soil may be used by fibre, ash, lime and sludge etc. CBR
value depends on the liquid limit (Wl), Plastic limit (Wp), plasticity index (Ip), maximum dry density, optimum moisture
content, swelling pressure, degree of expansiveness and permeability of soil or mix specimen. These tests are
performed in laboratory. This research paper deals with design of flexible pavement by using black cotton soil with
20% sugarcane bagasse ash (SCBA) and different percentage of Coir Fibre. In this research, the fibre (Aspect ratio
60) is mixed from 0.25% to 1.25% in mix of black cotton soil + 20% SCBA. The engineering parameters are also
determined by performed tests. For studying the behaviour of black cotton soil with different percentage of sugarcane
bagasse ash, the Atterberg’s limits (Liquid Limit, Plastic Limit, Plasticity Index), standard proctor test, California
Bearing Ratio are performed.