Mechanical Analysis of Frost Heaving Damage of Closed Pore in Cement Mortar

Abstract

Based on the thermodynamic equilibrium principle and elastic mechanics theory, the mechanical calculation of borehole wall stress under ice-formation. pressure effect is carried out for the water saturation, condition of cement mortar closed pore. The pore configuration in the cement mortar can be approximated as spherical or cylindrical. A micro-mechanics calculation model is established The borehole wall inner and outer surface tensile stress is deduced in different pores under the ice-formation pressure effect. For the cement mortar component, the borehole wall stress of spherical and cylindrical pores is calculated at