EFFECT OF SUGARCANE BAGASSE ASH AND BIOENZYME ON ENGINEERING PROPERTIES OF CLAYEY SOIL by Jagmohan Singh
Abstract
Clays with intermediate plasticity (CI) are having very low shearing strength and low bearing capacity. Hence this type of soil is subjected to volumetric change with change in season and causes great damage to structures. The aim of present research is to increase strength of clayey soil having intermediate plasticity (CI) using baggase ash and bioanzyme (Renolith). Bagasse is the fibrous matter that remains after sugarcane stalks are crushed to extract their juice. When this bagasse is burnt the resultant ash is called bagasse ash. Bio-enzyme is a natural, non toxic, non flammable, non-corrosive liquid enzyme formulation fermented from vegetable extracts that improves the engineering properties of soil, facilitates higher soil compaction densities and increases stability. In the present study the soil sample is taken from Gopalon village, district Fatehgarh Sahib. Various tests like specific gravity, liquid limit test, plastic limit test, modified proctor test, soaked CBR and UCS tests are performed on virgin soil sample and soil mixed with different proportions of bagasse ash and renolith. This soil which is taken for the study is classified as CI as per Indian Standard Classification System. In this study different ratios of baggase ash (3%, 6%, 9%, 12% and 15%) and bioenzymes (1%, 1.5% and 2%) of optimum dose of bagasse ash is used to stabilize the CI soil. The optimum percentage value of material used to stabilize the soil is 12% Bagasse ash and 1.5% Renolith of 12% Bagasse ash. After the addition of 12% Bagasse ash the maximum dry density decreased from 18.7 kN/m3 to 17.8 kN/m3 and optimum moisture content increased from 12% to 16%. At the optimum dosage of bagasse ash and renolith soaked CBR value is increased from 1.1% to 5.0%. The UCS value is increased from 238.5 kN/m2 to 515.6 kN/m2.
