کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1454470 | 1509670 | 2015 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The validity of the formation factor concept from through-out diffusion tests on Portland cement mortars The validity of the formation factor concept from through-out diffusion tests on Portland cement mortars](/preview/png/1454470.png)
The diffusion coefficients of ions and radionuclides in cementitious materials are the basic parameters to evaluate the state of the degradation of structures. In this article, three different tracers (two ions, and a radionuclide) were tested on the same formulations of mortars (sand volume fractions from 0 to 60%) in terms of the through-out diffusion, to determine the effective diffusion coefficients of each tracer and each formulation. The aim of this study is to prove the validity of the formation factor equation relating the effective diffusivity of a tracer in cementitious material to its diffusion coefficient in pure water. This result is extremely interesting because once the geometric formation factor of a material is known, it is possible to determine the values of the effective diffusion coefficients of any other diffusing species in this material.
Journal: Cement and Concrete Composites - Volume 63, October 2015, Pages 76–83