EFFECT OF BASE-COURSE QUALITY ON LOAD TRANSMISSION THROUGH FLEXIBLE PAVEMENTS

REPRESENTATIVE TEST DATA FROM THE LOAD TRANSMISSION PROJECT ILLUSTRATE THE RELATIVE EFFECTIVENESS OF TYPICAL BASE AND SUBBASE MATERIALS IN PROTECTING THE SUBGRADE FROM OVERSTRESS. ANGULAR MATERIALS SUCH AS CRUSHED STONE OR CRUSHED SLAG ARE PARTICULARLY EFFECTIVE IN THE LOWER LAYERS OF THE PAVEMENT WHERE THEIR SHEARING RESISTANCE IS GREATLY AUGMENTED BY THE CONFINING EFFECT OF THE UPPER LAYERS. RELATIVE EFFECTIVENESS OF A WIDE VARIETY OF MATERIALS CAN BE PREDICTED QUALITATIVELY BY REFERENCE TO TRIAXIAL TESTS, AND THERE IS HOPE THAT SUCH CORRELATION CAN BE ESTABLISHED ON A QUANTITATIVE BASIS. IT IS IMPORTANT THAT THE TRIAXIAL LOADING RATE AND THE CONDITION OF THE SPECIMENS AT TIME OF TEST BE CONSISTENT WITH SEVICE CONDITIONS EXPECTED IN THE PAVEMENT. KNOWLEDGE OF THE COMPARATIVE VALUES OF AVAILABLE PAVING MATERIALS WILL ENABLE THE DESIGNER TO ESTABLISH ALTERNATE DESIGNS OF FLEXIBLE PAVEMENTS WHICH ARE TRULY EQUIVALENT. NATURAL COMPETITIVE FORCES THEN WILL DETERMINE THE BEST DESIGN FOR A GIVEN CONSTRUCTION AREA. SIGNIFICANT SAVINGS MAY BE POSSIBLE BY INTELLIGENT SELECTION OF THE MOST ECONOMICAL MATERIALS. /AUTHOR/

  • Supplemental Notes:
    • Vol 34, pp 224-247, FIGS, 1 TAB, 5 REF
  • Authors:
    • Herner, R C
    • Aldous, W M
    • Mcleod, N W
    • Johnson, C W
    • Nunez, H
    • Palmer, L A
    • Campen, W H
  • Discussers:
    • Swayze, H
    • McDowell, C
  • Publication Date: 1955

Media Info

  • Monograph Title: Proceedings of the Thirty-Fourth Annual Meeting of the Highway Research Board, Washington, D.C., January 11-14, 1955
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00233133
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 5 1972 12:00AM