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Three-Dimensional Computer Simulation of Portland Cement Hydration and Microstructure Development.


pdf icon Three-Dimensional Computer Simulation of Portland Cement Hydration and Microstructure Development. (3744 K)
Bentz, D. P.

Journal of the American Ceramic Society, Vol. 80, No. 1, 3-21, 1997.

Keywords:

portland cement; computer simulation; building technology; cement hydration; chemical shrinkage; compressive strength; computer modeling; heat of hydration; maturity; microstructure; self desiccation

Abstract:

A three-dimensional computer model for the simulation of portland cement hydration and microstructure development has been developed. Starting with a measured particle-size distribution and a set of scanning electon microscopy images, a three-dimensional representation of a cement of interest is reconstructed, matching the phase volume fractions and surface-area fractions of the two-dimensional images. A set of cellular-automata rules is then applied to the starting microstructure to model the chemical reactions for all of the major phases during the evolving hydration process. The dissolution cycles used in the model have been calibrated to real time using a single set of parameters for two cements at three different water-to-cement ratios.