MEASUREMENT OF ELASTIC AND STRENGTH PROPERTIES OF CEMENTED MATERIALS IN ROAD BASES

RESULTS ARE PRESENTED OF MEASUREMENTS OF THE DYNAMIC ELASTIC PROPERTIES AND THE COMPRESSIVE AND FLEXURAL STRENGTHS OF LABORATORY SPECIMENS OF CEMENTED MATERIALS OF THE TYPE USED IN ROAD BASES AND SUBBASES. A SURFACE WAVE PROPAGATION METHOD IS DESCRIBED FOR MEASURING THE IN SITU MODULUS OF ELASTICITY OF CEMENTED LAYERS OF A ROAD. ESTIMATES OF THE STRENGTH OF THE UNCRACKED MATERIALS ARE MADE FROM EMPIRICAL RELATIONS OF THE TYPE DISCUSSED. REPETITIVE MEASUREMENTS AT THE SURFACE OF A ROAD BY THE SURFACE-WAVE PROPAGATION METHOD TO STUDY THE CHANGES IN THE ELASTIC PROPERTIES OF CEMENTED BASES ARE DISCUSSED. THE INFLUENCE OF THE RESULTS OF THESE MEASUREMENTS ON DESIGN CRITERIA FOR CEMENTED LAYERS OF A ROAD IS DISCUSSED BRIEFLY. IT IS CONCLUDED THAT THE TECHNIQUE USED CAN PROVIDE INFORMATION ON TENSILE STRESSES DEVELOPED IN CEMENTED ROAD BASES AND CAUSED BY THE PASSAGE OF TRAFFIC. IT PERMITS AN ESTIMATE TO BE MADE AS TO WHETHER THE BASE WILL DEVELOP CRACKS FROM THESE STRESSES. THE STRONGER THE MATERIAL, THE GREATER IS THE DISTANCE BETWEEN CRACKS, BUT IN THE ABSENCE OF REINFORCEMENT THERE IS ALSO A TENDENCY FOR THE CRACKS TO WIDEN GIVING POOR TRANSFERENCE OF SHEAR STRESSES AND PRODUCING REFLECTION CRACKS IN THE SURFACING. THE WEAKER CEMENTED MATERIALS BREAK DOWN TO GIVE A MATERIAL HAVING AN ELASTIC MODULUS COMPARABLE TO THAT OF THE ORIGINAL UNBOUND COMPACTED MATERIAL.

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  • Supplemental Notes:
    • Paper sponsored by Committee on Soil-Portland Cement Stabilization and presented at the 45th Annual Meeting. 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:
    • Jones, R
  • Publication Date: 1966

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 101-111
  • Monograph Title: Frost, physical properties and stabilization
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00230541
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:40AM