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Title: NATURAL BRINE AS AN ADDITIVE TO ABRASIVE MATERIALS AND DEICING SALTS (DISCUSSION AND CLOSURE)
Accession Number: 00469145
Record Type: Component
Availability: Find a library where document is available Abstract: Large quantities of natural oil and gas field brines are available at little or no cost at many locations in the Appalachian Region. Because these brines contain significant quantities of both sodium and calcium chloride salts, they appear to be an attractive substitute for conventional chemicals as an additive to abrasive materials and as a prewetting agent for deicing salts. Such additives are used for freezeproofing abrasive stockpiles and improving salt's performance as a deicing chemical. To evaluate the technical and economic feasibility of using brine in these applications, five abrasives (bottom ash, cinders, sand, sawdust, and limestone) were studied. It was found that the first four could be freezeproofed effectively over a wide range of initial moisture contents and at temperatures as low as 10 deg F when natural brine with total dissolved solids (TDS) of 265 670 mg/L was used. Overall, few trends or generalizations can be drawn between the various abrasives; each brine-abrasive combination must be considered as an individual case when freezeproofing application rates are developed. For limestone, application of brine for freezeproofing is limited by the physical properties of the aggregate. Only limestone containing less than or equal to 3 percent initial moisture could be freezeproofed. Spraying brine on the abrasive materials as a stockpile is being formed, followed by supplemental applications dictated by the frequency and intensity of precipitation, appears to be the optimum procedure for freezeproofing stockpiles. The highway agency should have brine storage tanks at its maintenance stations to assure a reliable brine supply when needed during storm periods. Laboratory tests were conducted to evaluate the use of brine as a prewetting agent for rock salt. Results of melting, penetration, and bounce-off tests for the natural brine used indicated performance almost identical to that of a 32 percent solution of calcium chloride. It was concluded that prewetted salt initiated slightly more rapid melting compared with dry salt, but there did not appear to be a significant difference. Wetted salt stayed closer to the point of contact than dry salts. As the liquid application rate increased, there was a small but not significant reduction in bounce-off.
Supplemental Notes: Publication of this paper sponsored by Committee on Winter Maintenance. 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
Monograph Title: Monograph Accession #: 01418110
Authors: Eck, Ronald WSack, William ATickle, RonaldDiscussers: Kirchner, Henry W
Pagination: p. 16-26
Publication Date: 1987
Serial: ISBN: 0309045088
Features: Figures
(7)
; References
(11)
; Tables
(3)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Economics; Geotechnology; Highways; Maintenance and Preservation; Materials; Vehicles and Equipment; I35: Miscellaneous Materials; I61: Equipment and Maintenance Methods
Files: TRIS, TRB
Created Date: Jun 30 1988 12:00AM
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