Pavement Design Using TerraZyme Stabilized Soil

Abstract

Pavement is a structure, which is laid to support the wheel load and to spread the load stress to a wider area on the top of soil subgrade. The process of changing the physical, chemical, and biological property of a natural soil, in order to improve their tensile strength, bearing capacity and overall performance, by using controlled compaction, proportioning, in addition of suitable stabilizer and admixture, is known as stabilization of soil. The major application of soil stabilization is in the field of pavement set up over a weak subgrade soil. It is very much essential to improve its strength, bearing capacity, and performance to a level higher than the existing condition. By modifying the subgrade soil properties, economy can be achieved in pavement construction by having reduced upper crust thickness. The main objective of this work is to have an economical pavement design. In this study, the type of soil used is silty sand (SM), and for stabilization of soil, TerraZyme was used. After stabilizing the soil by using TerraZyme, there was a marked improvement in compaction property, California bearing ratio (CBR) value, unconfined compressive strength (UCS) value, cohesion value, and angle of intersection. The pavement thickness was designed by using IRC:37-2012, after stabilization of soil the thickness of the pavement was reduced.