EFFECT OF AGGREGATE MINERALOGY ON POLISHING RATE AND SKID RESISTANCE IN PENNSYLVANIA
A PILOT STUDY ON SKID RESISTANCE IN 1960 CLASSIFIED 11 OF THE 19 SELECTED TEST SITES AS SLIPPERY. THESE SLIPPERY PAVEMENTS EXHIBITED POLISHED CARBONATE AGGREGATE. A CONTINUING PROGRAM OF MEASURING SKID RESISTANCE ON PENNSYLVANIA HIGHWAYS WAS CONDUCTED IN ANNUAL SKID SURVEYS. DATA REVIEWED INDICATED THAT THERE WAS NO SATISFACTORY CONSTRUCTION OR MATERIAL SPECIFICATION TO ENSURE PERMANENT ADEQUATE SKID RESISTANCE ON THE LIFE OF A BITUMINOUS PAVEMENT SURFACE. THE SKID RESISTANCE OF BITUMINOUS PAVEMENT SURFACE IN PENNSYLVANIA IS GENERALLY RELATED TO THE TYPE OF COARSE AGGREGATE USED. THE GRAVEL AND SAND-STONE SURFACES HAVE HIGHER AVERAGE SKID RESISTANCE THAN THE CARBONATE SURFACES. SLAG AND OTHER AGGREGATE TYPE SURFACES GIVE INTERMEDIATE SKID MEASUREMENTS. A SERIES OF TEST SECTIONS WAS CONSTRUCTED TO EVALUATE THE CONTROLLING PARAMETERS IN CARBONATE AGGREGATES. A NUMBER OF BLENDS OF CARBONATES WITH OTHER AGGREGATES WERE ALSO INCLUDED TO DETERMINE THE EFFECT OF BLENDING ON SKID RESISTANCE. A MINIMUM OF 1000 FT. WAS SET FOR EACH SKID TESTING SECTION. THE TEST STRIP AGGREGATES (CARBONATE, SLAGS, GRAVELS, BLENDS AND OTHERS) WERE IDENTIFIED PETROGRAPHICALLY, AND THEIR PROPERTIES DETERMINED. CONTINUED EXPOSURE TO TRAFFIC AND PERIODIC SKID TESTING ARE BEING DONE TO PROVIDE AN EVALUATION OF THE SKID RESISTANCE POTENTIAL OF ROCK FORMATION IN PENNSYLVANIA, SO THAT SUITABLE AGGREGATE SPECIFICATIONS CAN BE PREPARED TO PROVIDE PERMANENT ADEQUATE SKID RESISTANCE THROUGHOUT THE PAVEMENT'S LIFE. THE SUPPLEMENTARY LABORATORY TESTING OF THESE AGGREGATES IS DIRECTED AT DEVELOPING A METHOD OF PREDICTING FIELD PERFORMANCE OF AGGREGATES TO BE USED. /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Characteristics of Aggregates and Fillers for Bituminous Construction and presented at the 49th Annual Meeting. 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:
- Gramling, Wade L
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Conference:
- 49th Annual Meeting of the Highway Research Board
- Location: Washington District of Columbia, United States
- Date: 1970-1-12 to 1970-1-16
- Publication Date: 1970
Media Info
- Media Type: Digital/other
- Features: Figures; Tables;
- Pagination: pp 18-21
- Monograph Title: Aggregates and skid resistance of bituminous pavements
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Serial:
- Highway Research Record
- Issue Number: 341
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Bituminous pavements; Blends; Carbonates; Coarse aggregates; Geological surveying; Gravel; Pavements; Petrography; Polished aggregates; Sandstones; Service life; Skid resistance; Slag; Surfaces
- Geographic Terms: Pennsylvania
- Old TRIS Terms: Pavement life; Petrographic investigations
- Subject Areas: Design; Geotechnology; Highways; Materials; Pavements;
Filing Info
- Accession Number: 00211611
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 8 1971 12:00AM