- Author
-
Bentz, D. P.
|
Garboczi, E. J.
|
Gingold, D.
|
Lobb, C. J.
|
Jennings, H. M.
- Title
- Diffusion Studies in a Digital-Image-Based Cement Paste Microstructural Model.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
Thinking Machines Corp., Cambridge, MA
Maryland Univ., College Park
Northwestern Univ., Evanston, IL
- Book or Conf
- National Institute of Standards and Technology and American Ceramic Society. Advances in Cementitious Materials. Ceramic Transactions. Volume 16. July 22-26, 1990,
Gaithersburg, MD,
Mindess, S., Editors,
227-235 p.,
1991
- Keywords
-
cements
|
diffusion
|
microstructures
|
algorithms
|
diffusivity
|
hydration
|
predictive models
|
connected porosity fraction
- Abstract
- A digital-image-based model of the microstructure of cement paste, coupled with a new, fast algorithm for computing the conductance of random conductor lattices, are used to study the diffusivity of the capillary pore space of cement paste. Degree of hydration and water:cement ratio are the principal variables. Computational methods and preliminary data are presented, and compared to experimental results. Model cement pastes with different values of water:cement ratio and degree of hydration are found to have diffusivities that lie on a single master curve when ploted as a function of the connected pore space fraction.