A NEW DEVELOPMENT IN THE MODIFICATION OF THE PROPERTIES OF CONCRETE FOR USE IN PAVEMENTS

THE GREATER LOAD SPREADING CAPACITY OF A RIGID PAVEMENT DUE TO THE HIGH RIGIDITY OF THE CONCRETE, IS ACCOMPANIED BY A RELATIVELY LOW TENSILE STRENGTH AND LOW CAPACITY TO ACCOMMODATE MOVEMENTS CAUSED BY CLIMATE VARIATIONS. DEMANDS MADE BY THE STRUCTURE OF THE PAVEMENT ON THIS MULTIPHASE MATERIAL HAVE BEEN ESTABLISHED. THE MODIFICATION PROPOSED IS THAT THE AGGREGATE BE COATED WITH A CHEMICALLY STABLE SOFT MEDIUM BEFORE IT IS INCORPORATED INTO THE MIX. CONFIRMATION HAS BEEN MADE OF THE PREDICTED EFFECTS OF THIS MODIFICATION ON WORKABILITY, STATIC FLEXURAL STRENGTH AND DEFORMATION, REVERSED FLEXURAL FATIGUE STRENGTH, AND FREE AND RESTRAINED MOVEMENTS DUE TO TEMPERATURE AND MOISTURE VARIATIONS. A COMPARISON HAS BEEN MADE BETWEEN THE PREDICTED STRUCTURAL BEHAVIOR OF PAVEMENT SLABS BASED ON THEIR BEHAVIOR IN LABORATORY TESTS. THIS COMPARISON SHOWS THAT SIGNIFICANT IMPROVEMENT IN A NUMBER OF IMPORTANT RESPECTS CAN BE EXPECTED FROM THE USE OF THE MODIFIED CONCRETES. IN ADDITION, THE MODIFICATION ENABLES EFFICIENT USE OF LOWER QUALITY AGGREGATES. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1971/370/370-004.pdf
• Supplemental Notes:
  • Sponsored by Committee on Mechanical Properties of Concrete. 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:
  • Lees, G
  • Singh, G
• Publication Date: 1971

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 36-47
• Monograph Title: Concrete
• Serial:
  • Highway Research Record
  • Issue Number: 370
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Concrete pavements; Deformation curve; Durability; Fatigue tests; Laboratory tests; Load transfer; Pavement design; Rigid pavements; Structural analysis; Structural mechanics
• Uncontrolled Terms: Structural behavior
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 00214093
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 23 1972 12:00AM