Virtual Pervious Concrete: Microstructure, Percolation, and Permeability.
Virtual Pervious Concrete: Microstructure, Percolation,
and Permeability.
(405 K)
Bentz, D. P.
ACI Materials Journal, Vol. 105, No. 3, 297-301,
May/June 2008.
Keywords:
concretes; permeability; microstructures; percolation;
computer models; coinductivity; transport proeprties;
algorithms
Abstract:
As the usage of pervious concrete continues to increase
dramatically, a better understanding of the linkages
between microstructure, transport properties, and
durability will assist suppliers in mixture
proportioning and design. This paper presents various
virtual pervious concrete microstructural models and
compares their percolation characteristics and computed
transport properties to those of real world pervious
concretes. Of the various virtual pervious concretes
explored in this study, one based on a correlation
filter three-dimensional reconstruction algorithm
clearly provides a void structure closest to that
achieved in real pervious concretes. Extensions to
durability issues, such as freezing-and-thawing
resistance and clogging, that use further analysis of
the virtual pervious concrete's void structure are
introduced.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899