Abstract
The pore structure of concrete has long been recognized as the key to a wide range of different mechanical, physical and chemical properties. However, the finite range of the different interrogation techniques for measuring pore structure has always limited our overall picture. In order to add to that picture, a high resolution, three-dimensional imaging technique called x-ray microtomography was employed as a way to link measurable microstructural features with alternate measurements of permeability in different concrete systems. Four different concretes were imaged at spatial resolutions between 1 and 4 microns. Using 3D image analysis techniques, the pore system was characterized by size distribution and connectivity. A parameter we termed "disconnected pore distance" correlated well with standard measures of chloride permeability.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 611-620 |
| Number of pages | 10 |
| Journal | Materials and Structures/Materiaux et Constructions |
| Volume | 39 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jul 2006 |
Funding
Acknowledgements This research was supported jointly by grants from the Maine Department of Transportation (9350.50) and the U.S. National Science Foundation (CMS-9733769). Both sponsors are gratefully acknowledged. Parts of this research were conducted at the National Synchrotron Light Source, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy, Division of Materials Sciences and Division of Chemical Sciences (DOE contract number DE-AC02-76CH00016.
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science
- Mechanics of Materials