The effect of sulfate ion diffusion on the structure of cement stone
The effect of sulfate ion diffusion on the structure of cement stone
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DOI：
10.1016/s0958-9465(96)00032-7
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发表时间：
1996
影响因子：
10.5
通讯作者：
P. Gospodinov;R. Kazandjiev;M. Mironova
中科院分区：
文献类型：
--
作者：
P. Gospodinov;R. Kazandjiev;M. Mironova
本文研究了硫酸根离子在水泥石中的扩散。通过在0.515%Na_2SO_4水溶液中浸泡不同时间，观察了SO_4离子对水泥浆体的渗透作用。硫酸根离子渗透的深度是通过求解非稳态传质方程，考虑材料中发生的化学反应和实验确定的扩散系数来估计的。通过确定水泥石抗压强度和总孔隙率随时间的变化，间接跟踪材料结构对硫酸盐扩散的响应。
This paper studies sulfate ion diffusion into cement stone. The penetration of SO4ions into the material is followed experimentally by keeping cement paste specimens in an aqueous solution of 0.515% Na2SO4for different periods of time. The depth of sulfate ion penetration is estimated by solving a non-steady equation of mass transfer, considering chemical reactions which take place in the material and experimentally determining the diffusion coefficient. Material structural response to sulfate diffusion is indirectly followed by determining the change in time of the cement stone compression strength and total porosity.