Characterization of Elastic and Time-dependent Deformations in Normal Strength and High Performance Concrete by Image Analysis

Deformations in normal strength concrete (NSC) and high performance concrete (HPC) were examined using image analysis to better understand the distribution of strain in these materials as related to their composition and microstructure. Elastic strain, creep, and shrinkage were shown to occur non-uniformly throughout the NSC and HPC microstructure and creep and shrinkage strain both increased with time, as expected. The non-uniformity in strain measurements also increased with time, as a consequence of dissimilarities in time-dependent behavior of the paste and aggregate. However, compared with NSC, the time-dependent strains in the HPC were lower and showed less variation, suggesting a more uniform microstructure. In both NSC and HPC, high-strain sub-regions were evident in the vicinity of the interfacial transition zone (ITZ), likely as a consequence of the strain mismatch between aggregate and paste. The thickness of the high strain sub-regions along the ITZ in HPC were approximately one half of those in NSC.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier
• Authors:
  • Lopez, Mauricio
  • Kahn, Lawrence F
  • Kurtis, Kimberly E
• Publication Date: 2007-8

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 1265-1277
• Serial:
  • Cement and Concrete Research
  • Volume: 37
  • Issue Number: 8
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Aggregates by relationship to concrete; Cement paste; Creep; Deformation; Elastic deformation; High performance concrete; Image analysis; Microstructure; Shrinkage
• Uncontrolled Terms: Interfacial transition zone; Normal strength concrete
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01077060
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 28 2007 8:02AM