- Author
-
Bentz, D. P.
- Title
- Virtual Pervious Concrete: Microstructure, Percolation, and Permeability.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Journal
-
ACI Materials Journal,
Vol. 105,
No. 3,
297-301,
May/June 2008
- Keywords
-
concretes
|
permeability
|
microstructures
|
percolation
|
computer models
|
coinductivity
|
transport proeprties
|
algorithms
- Identifiers
- NIST hard core/soft shell (HCSS) model; degree of connectivity of the voids in three-dimensional space; electrical conductivities of the virtual pervious concretes; finite difference computer program (dc3d.c); linear Stokes solver (microperm.c and perm3d3.f); two-dimensional slices from the three-dimensional microstructural models; three-dimensional burning algorithm
- 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.