GSTF Journal of Geological Sciences (JGS)

, 2:2

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

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

  • J. RajaramanAffiliated withDepartment of Harbor and Ocean Engineering, AMET University
  • , K. ThiruvenkatasamyAffiliated withKagoshima University
  • , S. Narasimha RaoAffiliated withIndian Institute of Technology


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, 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.


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