CAN RESEARCH IN VOLUME CHANGE ASSIST THE DESIGNER?

Most theories on the time-dependent volume changes of concrete structures assume that when load is applied there is an initial elastic deformation followed by a long-term inelastic deformation. In reality, it is the instantaneous deformation that is seriously complicated by inelastic effects. Deformations at 1 year can be calculated with greater certainty than instantaneous deformations. The multiplicity of creep data in the literature, practically all of which are applicable only to a specific set of conditions and of no general use, is the result of the multiplicity of available aggregates. But the only properties of aggregates that influence creep of concrete are elastic properties and concentration, and these can be determined in 1 day. If there were a comprehensive data bank of creep behavior of cement pastes of various water-cement ratios and various degrees of hydration exposed to various ambient conditions, a designer would merely need to request a quick aggregate test to produce a good first approximation of volume change behavior of the structure. /Author/

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  • Publication of this paper sponsored by Committee on Performance of Concrete--Physical Aspects. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Philleo, Robert E
• Conference:
  • 55th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1976-1-19 to 1976-1-23
• Publication Date: 1976

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 10-13
• Monograph Title: Air sampling, quality control and concrete
• Serial:
  • Transportation Research Record
  • Issue Number: 613
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Aggregates; Cement paste; Concrete structures; Creep; Deformation; Elastic deformation; Hydration; Loads; Time dependence; Volume changes; Water cement ratio
• Uncontrolled Terms: Inelastic deformation; Loading
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00163028
• Record Type: Publication
• ISBN: 0309025893
• Files: TRIS, TRB
• Created Date: Oct 13 2000 12:00AM