Estimation of Air Void and Aggregate Spatial Distributions in Concrete under Uniaxial Compression Using Computer Tomography Scanning

This paper illustrates that computer tomography (CT) can be a viable, nondestructive method of estimating the air content of hardened concrete.. The method offers a 3-D spatial scan of the entire concrete specimen. Continual scanning can be conducted to allow determination of the evolution of air voids under sustained loading. Evolution of air void in the normal and high strength under uniaxial compression loading were different. For the normal strength concrete, significant nucleation and growth in air voids due to loading were detected in the air voids of sizes of 25 square mm, but there was no such observation in high strength concrete specimens loaded up to 85% of the ultimate strength.No intrinsic anisotropy in aggregate spatial distribution of both concrete mixes was detected from the fabric analysis.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Wong, RCK
  • Chau, K T
• Publication Date: 2005-8

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 1566-1576
• Serial:
  • Cement and Concrete Research
  • Volume: 35
  • Issue Number: 8
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Air voids; Concrete; High performance concrete; Modulus of elasticity; Pore size distribution; Tomography; Traffic distribution
• Uncontrolled Terms: Micromechanics; Uniaxial compression
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01004527
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 3 2005 8:30AM