Permeability of Concrete Chloride Under Carbonization and Flexural-Tensile Load

Abstract

In order to study the transmit problem of chloride in concrete under the coupling of carbonization and flexural-tensile load. Grade C30 concrete as the research object, loading test and rapid carbonization test were used to study the penetrating quality of chloride migration in concrete. The electric flux method was used to measure the electric flux of concrete in different carbonization time under the multifactor coupling. The chloride permeability coefficient of concrete was calculated and its relationship with concrete carbonization time was analyzed. The results showed that, the protective layer of concrete is completely carbonized about 28d. The carbonization depth is exponential growth with carbonization time before the completely carbonated through the test data and theoretical calculation. The chloride diffusion coefficient of concrete is described by a cubic polynomial function with carbonization time under the coupled of carbonization and flexuraltensile load, and the change rule becomes more obvious with the crease of flexuraltensile load.