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/
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Supplemental Notes:
- Vol 23, pp 101-108, 3 FIG, 2 TAB, 3 PHOT. 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.
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Authors:
- Middlebrooks, T A
- Haines, R M
- Publication Date: 1944
Media Info
- Media Type: Digital/other
- 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
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Serial:
- Highway Research Board Proceedings
- Volume: 23
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Accelerated tests; Airport runways; Base course (Pavements); California bearing ratio; Granular soils; Pavements; Shear strength; Soil tests; Subgrade (Pavements); Testing; Thickness; Wheel loads
- Uncontrolled Terms: Pavement thickness
- Old TRIS Terms: Bases; Cbr testing
- Subject Areas: Highways; Pavements;
Filing Info
- Accession Number: 00207297
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jul 18 1971 12:00AM