The Association and Dissociation Tendencies of the Coaxial and Non- Coaxial Components of Shear strength of Soils to Environment

DOI: 10.5176/2251-3353_GEOS14.34

Authors: J. Rajaraman, K.Thiruvenkatasamy and S. Narasimha Rao

Abstract: Soil is rock on its way to ocean. It undergoes many changes during the travel. The important factors which influence the geo-technical behavior of soil are : Grain size and Shape, Gradation, Water and Parent rock materials and Environment. The Geo-technical behavior of fine grains in soil is highly complex than coarse grains. A pure cohesive soil has pure shear or coaxial shear component only. A pure friction soil has Non-coaxial or simple shear component only. Normally a soil sample is a mixture of coarse and fine grains. The shear strength is shared between coaxial and non-coaxial component of the total shear strength of soil. The environment influences the Geo-technical behavior of soil. The coaxial and non-coaxial components of shear strength (coax and non-coax) of soil accepts and adjusts to reach a new equilibrium in stability. In this paper the association and dissociation of coax and non-coax with environmental conditions starting from laboratory and ending in marine environment through examples, illustrations and documented, reliable data available in literature.

Keywords: Hydrolysis, Pure shear, Simple shear,Coaxial and Non-coaxial components of shear strength, Cohesion and angle of internal friction