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《Concrete》 2005-11
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Research on rapid testing method for gas diffusion coefficient of concrete

LIU Zhi-yong~(1,2),SUN Wei~2,ZHOU Xin-gang~1(1.YanTai University,Yantai 264005,Shandong,China;2.Southeast University,Nanjing 210096,Jiangsu,China)  
On the basis of studying gas transfers mechanism into porous medium materials,a calculation formula of gas effective diffusion coefficient of concrete based on pressure gradient is deduced according to the relative theory,and a new rapid testing method for gas penetrability of high performance concrete and old concrete with higher pressure gradient is developed.Making use of the relationship model between the gas effective diffusion coefficient of concrete and the gas diffusion coefficient in straight capillary pore,the calculation formula of pore tortuosity factor in concrete is established.
【Fund】: 国家自然科学基金资助项目(59938170)
【CateGory Index】: TU528
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