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Interfacial Zone Percolation in Concrete: Effects of Interfacial Zone Thickness and Aggregate Shape.


pdf icon 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.