Abstract：Based on accelerated carbonation test, 1D, 2D and 3D carbonation of high performance concrete with different fly ash contents (0%, 15%, 20%, 40%, 60%) were studied. The interaction coefficients of 2D and 3D carbonation are defined. The time-dependent coefficient n of carbon dioxide diffusion and the interaction coefficients K of 2D and 3D carbonation are analyzed. The mathematical model which includes n and K is deduced. The experiments indicate that 2D and 3D carbonation have obvious interaction. Interaction coefficients obey the attenuation function through time t. The mathematical model of 2D and 3D carbonation life prediction based on Fick scattering law can be solved by Fourier expansion. The life prediction of concrete of Sutong Bridge beam shows that the 1D, 2D, 3D carbonation prediction life are 1595 a, 882 a and 758 a, respectively, 2D and 3D carbonation life predicted are reduced clearly.
出版日期: 2008-12-05
引用本文:
. Carbonation depth prediction of fly ash concrete
subjected to 2- and 3-dimensional CO attack[J]. Frontiers of Architecture and Civil Engineering in China, 2008, 2(4): 395-400.
CHEN Shudong, SUN Wei, ZHANG Yunsheng, GUO Fei. Carbonation depth prediction of fly ash concrete
subjected to 2- and 3-dimensional CO attack. Front. Struct. Civ. Eng., 2008, 2(4): 395-400.
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