CHEMICAL UNDERCUTTING OF ICE ON HIGHWAY PAVEMENT MATERIALS
Experiments were conducted to investigate the destruction of the ice-substrate bonds by chemical undercutting. The undercutting experiments determined the undercut area, as a function of time, of three deicers at three temperatures on highway core samples and laboratory-produced specimens. Tests were conducted at temperatures of 25 deg F (-4 deg C), 15 deg F (-9 deg C), and 5 deg F (-15 deg C) using all the substrates in the as-received, but cleaned, condition. The three deicers--NaCl, CaCl2, and ethylene glycol--were used for all temperature-substrate combinations. The substrates included portland cement concrete, dense-graded asphalt, open-graded asphalt, rubber-modified asphalt core samples, and laboratory-produced specimens made of portland cement concrete and dense-graded asphalt. Undercutting action was also investigated on smooth highway core samples and smooth laboratory-produced specimens at selected temperatures. Linear regression models with good predictive power were developed to predict the undercutting behavior of deicer material for given combinations of pavement type, surface condition, and temperature as a function of time. Using these regression models, the following conclusions were drawn: (a) at 25 deg F, sodium chloride produces larger undercut areas than does calcium chloride when applied to as-received core samples of dense-graded and open-graded asphalt; (b) however, at 25 deg F, calcium chloride produces more undercutting action than does sodium chloride when applied to as-received core samples of portland cement concrete and rubber-modified asphalt; (c) at 15 deg F and 5 deg F, calcium chloride produces more undercutting than does sodium chloride for all four as-received pavement core samples; and (d) at 25 deg F and 15 deg F, the as-received laboratory-produced specimens tended to be undercut more extensively than the corresponding core samples at these temperatures.
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1304, Highway Maintenance Operations and Research 1991. 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:
- Blackburn, Robert R
- Bauer, Karin M
- McElroy, A D
- Pelkey, Jean E
- Publication Date: 1991
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 230-242
- Monograph Title: Highway maintenance operations and research 1991
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Serial:
- Transportation Research Record
- Issue Number: 1304
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Asphalt; Asphalt rubber; Calcium chloride; Core samples; Deicers (Equipment); Dense graded aggregates; Ethylene glycol; Forecasting; Laboratories; Laboratory tests; Linear regression analysis; Mathematical models; Mixtures; Open graded aggregates; Portland cement concrete; Samples; Snow and ice control; Sodium chloride; Specimens; Temperature
- Uncontrolled Terms: Deicers; Dense graded mixes; Laboratory specimens
- Old TRIS Terms: Chemical undercutting; Cores; Test results
- Subject Areas: Highways; Maintenance and Preservation; Vehicles and Equipment; I62: Winter Maintenance;
Filing Info
- Accession Number: 00620424
- Record Type: Publication
- ISBN: 0309051118
- Files: TRIS, TRB
- Created Date: Mar 31 1992 12:00AM