Interfacial Zone Percolation in Concrete: Effects of Interfacial Zone Thickness and Aggregate Shape.
Interfacial Zone Percolation in Concrete: Effects of
Interfacial Zone Thickness and Aggregate Shape.
(346 K)
Bentz, D. P.; Hwang, J. T. G.; Hagwood, C.; Garboczi, E.
J.; Snyder, K. A.; Buenfeld, N.; Scrivener, K. L.
Materials Research Society. Microstructure of
Cement-Based Systems/Bonding and Interfaces in
Cemetitious Materials. 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), 437-442 pp, 1995.
Keywords:
building technology; concretes; thickness
Abstract:
Previously, a hard core/soft shell computer model was
developed to simulate the overlap and percolation of the
interfacial transition zones surrounding each aggregate
in a mortar or concrete. The aggregate particles were
modelled as spheres with a size distribution
representative of a real mortar or concrete specimen.
Here, the model has been extended to investigate the
effects of aggregate shape on interfacial transition
zone percolation, by modelling the aggregates as hard
ellipsoids, which gives a dynamic range of shapes from
plates to spheres, to fibers. For high performance
concretes, the interfacial transition zone thickness
will generally be reduced, which will also affect their
percolation properties. This paper presents results
from a study of the effects of interfacial transition
zone thickness and aggregate shape on these percolation
characteristics.
