- 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.