Quantification of environmental effect for carbonation and durability analysis of concrete structures

Quantification of environmental effect for carbonation and carbonation depth analysis of concrete play an important role in the quantitative durability analysis and design of concrete structures under carbonation environment. The influences of temperature, relative humidity, CO2 concentration on the carbonation depth of concrete are investigated quantitatively. The quantification index of environmental action for carbonation is proposed based on the multi-field coupled numerical model first. Then, a practical prediction model for carbonation depth of concrete is developed by introducing the environmental factors to modify the theoretical model, based on which the service life and durability design parameters of concrete structures are discussed quantitatively. Finally, the efficiency and applicability of the proposed method is verified by comparing with the experimental data. Based on the above work, the quantitative durability design of concrete structures could be implemented by adopting the carbonation coefficient as the governing parameter. ©, 2015, Tumu Gongcheng Xuebao/China Civil Engineering Journal. All right reserved.