Research on rapid testing method for gas diffusion coefficient of concrete
Research on rapid testing method for gas diffusion coefficient of concrete
复制标题
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Liu Zhi-yong;Sun Wei
中科院分区：
文献类型：
--
作者：
Liu Zhi-yong;Sun Wei
在研究气体在多孔介质材料中传输机理的基础上，根据相关理论推导了基于压力梯度的混凝土气体有效扩散系数计算公式，提出了一种高压力梯度下高性能混凝土和老混凝土气体渗透性的快速测试方法，利用混凝土气体有效扩散系数与压力梯度的关系模型，建立了混凝土气体渗透性的快速测试方法。气体在直毛细孔中的扩散系数，建立了混凝土孔隙弯曲系数的计算公式。
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.