- Author
-
Garboczi, E. J.
|
Bentz, D. P.
- Title
- Effect of Interfacial Transition Zone on Concrete Properties: The Dilute Limit.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- Materials for the New Millennium. Materials Engineering, 4th Conference. Proceedings. Volume 2. November 10-14, 1996,
American Society of Civil Engineers, New York, NY,
Washington, DC,
Chong, K. P., Editors,
1228-1237 p.,
1996
- Keywords
-
concretes
|
building technology
|
composite
|
dilute limit
|
interfacial transition zone
|
sand
- Abstract
- The interfacial transition zone (ITZ) that exists in the cement paste near the sand and rocks in concrete force concrete to be considered as a (at least) three-phase composite: (1) bulk cement paste, (2) ITZ cement paste, and (3) rock and sand, collectively called aggregates. The ITZ really contains a gradient of properties, but can be approximated as a single property shell with some finite thickness. This paper discusses how this gradient of properties can be quantitatively mapped into a single property shell, for the case of ionic diffusivity (electrical or thermal conduction), using an exact analysis of the dilute composite limit, in which the volume fraction of (spherical) aggregates is small.