By conducting axial compression load-carbonation coupling test on ordinary concrete,the influence mecha-nism of axial compression load on carbonation of ordinary concrete was studied.MATLAB was used to fit the test data.This paper establish a concrete carbonation prediction model considering the load,and analyze the impact of axial com-pression load on the carbonation depth of concrete.The results show that the carbonation depth of concrete increases with the increase of load(rate)and is closely related to the content of CO32-ions.The content of CO32-ions from the concrete surface after carbonization was fitted to obtain a model of the diffusion coefficient of CO32-ions changing with time.A model of carbonization of ordinary concrete under axial compression load was established through mass conser-vation and Fick's law.Simulation results have good consistency with the test results.
关键词
轴压荷载/碳化/影响机理/碳化模型
Key words
axial compression load/carbonization/influence mechanism/carbonization model
维普
万方数据