FORMULATION OF TENSILE STRAIN AT CRACKING OF GREEN CONCRETE

Abstract

The tensile strain at cracking of early age concrete was measured and formulated under the ambient temperature of 15 to 35 ℃. The initial brittleness of green concrete was occurred under the influences of rapid reduction of tensile capacity due to the viscosity and increase of it due to the elasticity at early age. The presented formula fitted to the tendency of time-dependent change of experimental value, and coefficients of the formula were shown as the functions of temperature. And further, quantitatively, the formula indicated the minimum value of tensile capacity of green concrete under each temperature ambience.