THEORETICAL AND PRACTICAL ASPECTS OF PRESTRESSED CONCRETE FOR HIGHWAY PAVEMENTS
AN EXPERIMENTAL PRESTRESSED CONCRETE SLAB WAS DESIGNED AND CONSTRUCTED TO OBTAIN THEORETICAL AND PRACTICAL INFORMATION FOR THE ADOPTION OF THE USE OF PRESTRESSED CONCRETE IN HIGHWAY AND AIRFIELD PAVEMENTS. PRESTRESSING METHODS ARE DISCUSSED. FRICTION REDUCING METHODS WERE STUDIED AND LOADING TESTS CONDUCTED. THE THREE FRICTION REDUCING DEVICES USED WERE: (1) ONE-INCH SAND COVERED WITH ONE LAYER OF BUILDING PAPER, (2) TWO LAYERS OF BUILDING PAPER, AND (3) TWO LAYERS OF COPPER-CLAD SISALKRAFT PAPER, THE COPPER SIDES FACING AND POWDERED SOAPSTONE BETWEEN THEM. THE SAND AND PAPER LAYERS SEEM TO BE ECONOMICAL AND SATISFACTORY FOR REDUCING BASE FRICTION. THE TEST INCIDATED THE OVER-ALL SUPERIOR BEHAVIOR OF THE PRESTRESSED CONCRETE SLAB. THE EFFECT OF REPEATED PRESTRESSING IN SHORT CYCLES PROVED BENEFICIAL. IT WAS DETERMINED THAT PRESTRESSING CAN BE DEVELOPED IN THE MOST EFFICIENT MANNER WHEN THE CONTINUOUSLY CHANGING VOLUMETRIC CHANGES IN THE CONCRETE HAVE A DECREASING TENDENCY. LOAD-CARRYING CAPACITY TESTS SHOWED THAT THE SOIL COULD HAVE RESISTED EXTREMELY HIGH LOADS. THE ADDED COMPRESSIVE ENERGY IN THE CONCRETE PROVIDED BY PRESTRESSING, COUPLED WITH ITS SPRING EFFECT WOULD MAKE CONSIDERABLE REDUCTION IN PAVEMENT THICKNESS POSSIBLE. LOAD TESTS PERFORMED AT THE SHRINKAGE CRACKS AND AT THE EDGES ALSO PROVED BENEFICIAL.
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Supplemental Notes:
- No 179, pp 13-31, 9 FIG, 3 TAB, 1 REF 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:
- Cholnoky, Thomas
- Publication Date: 1958
Media Info
- Media Type: Digital/other
- Pagination: 19p
- Monograph Title: Prestressed concrete pavement research
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Serial:
- Highway Research Board Bulletin
- Issue Number: 179
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Airport runways; Bearing capacity; Experimental roads; Load tests; Pavements; Prestressed concrete; Prestressing; Reduction (Chemistry); Skin resistance; Slabs; Soils; Thickness
- Uncontrolled Terms: Pavement thickness
- Old TRIS Terms: Highway pavement; Reduction; Soil bearing capacity; Thickness design
- Subject Areas: Geotechnology; Highways; Pavements;
Filing Info
- Accession Number: 00205713
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 16 1994 12:00AM