Multi-Scale Digital-Image-Based Modelling of Cement-Based Materials.
Multi-Scale Digital-Image-Based Modelling of
Cement-Based Materials.
(718 K)
Bentz, D. P.; Garboczi, E. J.; Jennings, H. M.; Quenard,
D. A.
Materials Research Society. Microstructure of
Cement-Based Systems/Bonding and Interfaces in
Cementitious Materials Symposia. Materials Research
Society Symposium Proceedings Volume 370. November
28-December 1, 1994, Boston, MA, Materials Research
Society, Pittsburgh, PA, Diamond, S.; Mindess, S.;
Glasser, F. P.; Roberts, L. W., Editor(s)(s), 33-41 pp,
1995.
Keywords:
building technology; cements; computer models
Abstract:
Computer modelling of the properties and performance of
cement-based materials is complicated by the large range
of relevant size scales. Processes occurring in the
nanometer sized pores ultimately affect the performance
of these materials at the structural level of meters and
larger. One approach to alleviating this complication
is the development of a suite of models, consisting of
individual digital-image-based structural models for the
calcium silicate hydrate gel at the nanometer level, the
hydrated cement paste at the micrometer level, and a
mortar or concrete at the millimeter level.
Computations performed at one level provide input
properties to be used in simulations of performance at
the next higher level. This methodology is demonstrated
for the property of ionic diffusivity in saturated
concrete. The more complicated problem of drying
shrinkage is also addressed.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899