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/

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 36-47
  • Monograph Title: Concrete
  • Serial:

Subject/Index Terms

Filing Info

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