CRITICAL ELEMENTS OF DESIGN AND CONSTRUCTION OF HEAVY-DUTY FLEXIBLE PAVEMENTS
THE INCREASE IN AIRCRAFT WEIGHT HAS MADE NECESSARY CHANGES IN THE DESIGN AND CONSTRUCTION OF FLEXIBLE PAVEMENTS TO PERFORM SATISFACTORILY UNDER THESE LOADS. THE U. S. ARMY CORPS OF ENGINEERS USES THE CALIFORNIA BEARING RATIO (CBR) SYSTEM IN THE OVER-ALL DESIGN OF A FLEXIBLE PAVEMENT STRUCTURE. THE MARSHALL PROCEDURE IS USED FOR DESIGNING BITUMINOUS CONCRETE SURFACES FOR FLEXIBLE PAVEMENTS. COMPACTION EQUIPMENT DEVELOPMENTS HAVING GREAT VALUE ARE: (1) HEAVY RUBBER-TIRED ROLLERS WEIGHING 32 TONS AND ABOVE TO PRODUCE A HIGH DEGREE OF COMPACTION IN BASES AND SUBBASES, (2) MEDIUM-WEIGHT RUBBER-TIRED ROLLERS WEIGHING 16 TO 32 TONS ARE EFFICIENT FOR COMPACTION OF ASPHALTIC CONCRETE, (3) THE USE OF ASPHALTIC MIXTURE SPREADERS FOR UPPER SUBBASE AND BASE COURSE LAYERS HAS PROVED PARTICULARLY EFFECTIVE IN FURNISHING TRUE GRADE, THUS INSURING A SMOOTH SURFACE AND IMPROVING UNIFORMITY OF OF COMPACTION, AND (4) PROOF-ROLLING WITH HEAVY RUBBER- TIRED ROLLERS WHEN PROPERLY SPECIFIED AND EXECUTED IS USEFUL IN PRODUCING SATISFACTORY HEAVY-DUTY FLEXIBLE PAVEMENTS. CONCLUSION IS MADE THAT A SATISFACTORY HEAVY- DUTY FLEXIBLE PAVEMENT CAN BE DESIGNED UTILIZING THE CBR METHOD FOR THE OVERALL PAVEMENT AND THE MARSHALL METHOD FOR THE BITUMINOUS CONCRETE. GOOD EQUIPMENT AND CONSTRUCTION PROCEDURES ARE NECESSARY TO INSURE THAT SPECIFICATION REQUIREMENTS ARE MET AND SATISFACTORY PAVEMENTS CONSTRUCTED.
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Supplemental Notes:
- pp 162-166, 2 FIG. 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:
- Turnbull, Willard J
- Publication Date: 1960
Media Info
- Media Type: Digital/other
- Monograph Title: SOIL AND FOUNDATION ENGINEERING IN THE UNION OF SOVIET SOCIALIST REPUBLICS
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Serial:
- Highway Research Board Special Report
- Issue Number: 60
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Aircraft; Asphalt concrete; Bituminous materials; California bearing ratio; Compactors; Flexible pavements; Mix design; Pavement design; Paving; Spreaders; Surface treating
- Uncontrolled Terms: Compaction equipment; Marshall mix design
- Old TRIS Terms: Bituminous surfacing; Rubber tired rollers
- Subject Areas: Aviation; Highways; Pavements; Vehicles and Equipment;
Filing Info
- Accession Number: 00205761
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 2 1994 12:00AM