AN EXPLORATORY STUDY ON ENHANCING STABILITY OF BLACK COTTON SOIL BY BIO-ENZYME: RENOLITH FOR SUBGRADE AND FOUNDATION

Abstract

there is a plethora of subgrade problems especially when the subgrade is on clayey or black
cotton soil. This soil shares 15-20% of all Indian soil and covers vast area of construction from
roads to heavy building construction. The major reason attributed to the poor behaviour against loading
and very low strength is due to presence of huge quantity of montmorillonite mineral, which is
responsible for excessive swelling in wet conditions and shrinkage cracks in summer as each of the
mineral component can hold 200A of water layer.
As the performance and economic feasibility are the most important features of any project on soil, thus in
this study, we aim to develop such alternative solution for improving locally available clayey soil
suitability in terms of its UCS and CBR value at corresponding OMC and MDD values. Also the effect on
Atterberg’s Limits on soil samples mixed with additive such as Renolith shall also be analysed to observe
the change in plasticity characteristics. Renolith is neither corrosive nor combustible polymer product and
is fluidic white polymer which is soluble in water used to enhance the bonding with soil and cement by
forming Nano rubber bands between particles resulting in forming a strong bond that enhances strength,
flexibility and permeability to the stabilized soil.