RESULTS OF ACCELERATED TRAFFIC TESTS OF RUNWAY PAVEMENTS

GENERAL CONCLUSIONS ARE: THE CALIFORNIA BEARING RATIO TEST HAS PROVED TO BE PRACTICAL FOR EVALUATING SOILS AND IS STILL CONSIDERED THE BEST METHOD OF DESIGN TO PROTECT AGAINST SHEAR DEFORMATION; THE THICKNESS CURVES NOW USED BY THE ENGINEER DEPARTMENT ARE CLOSE ENOUGH FOR PRACTICAL PURPOSES; HIGH QUALITY BASE MATERIAL (CBR AT LEAST 80) IS GENERALLY REQUIRED BENEATH THE PAVEMENT COURSE; THE USE OF LOW QUALITY BASE MATERIAL IN THE LOWER LAYERS OF THE BASE IN PLACE OF 80 PERCENT CBR MATERIAL DOES NOT INFLUENCE THE TOTAL THICKNESS REQUIRED OVER THE SUBGRADE, IF THE CBR VALUE SATISFIES THE DESIGN CURVES; HIGH CONSTRUCTION COMPACTION OF COHESIONLESS SUBGRADES IS NECESSARY; IT IS EXTREMELY IMPORTANT TO COMPACT OR DRAIN SATURATED SUBGRADES OF COHESIONLESS FINE SANDS OR SILTS. THE TESTS CONFIRMED IN GENERAL THE TENTATIVE DESIGN CRITERIA USED BY THE DEPARTMENT. MOST OF THE FAILURES RESULTING FROM TRAFFIC AT AIRFIELDS HAVE BEEN PRODUCED BY PLANES HAVING GROSS LOADS IN EXCESS OF THE CARRYING-CAPACITY OF THE PAVEMENTS AS RATED BY THE PRESENT TENTATIVE REQUIREMENTS. /AUTHOR/

  • Supplemental Notes:
    • Vol 23, pp 101-108, 3 FIG, 2 TAB, 3 PHOT
  • Authors:
    • Middlebrooks, T A
    • Haines, R M
  • Publication Date: 1944

Media Info

  • Monograph Title: Proceedings of the Twenty-Third Annual Meeting of the Highway Research Board Held at Edgewater Beach Hotel, Chicago, Illinois November 27-30, 1943
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00207297
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 18 1971 12:00AM