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Title:

LABORATORY MELTING PERFORMANCE COMPARISON: ROCK SALT WITH AND WITHOUT PREWETTING
Cover of LABORATORY MELTING PERFORMANCE COMPARISON: ROCK SALT WITH AND WITHOUT PREWETTING

Accession Number:

00974875

Record Type:

Component

Availability:

N/A
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Order URL: http://worldcat.org/issn/00978515

Abstract:

Prewetting road salt with liquid deicing chemicals has been suggested as a way to improve the melting performance of the salt and potentially reduce the amount of salt required to clear a roadway. Forensic Dynamics Inc. undertook this research to explore these possibilities. A protocol for manufacturing repeatable compact snow and for trafficking this snow to simulate rolling tire compaction was developed following a literature review and experimentation. ASTM Standard D632-83 rock salt was prewetted with a liquid deicing chemical and applied to compact snow. The friction of a rubber tire on this sample was measured and provided friction versus time curves for dry rock salt and each of six prewetted salt mixtures. Tests were conducted at 4, 8, and 12 gal of liquid chemical per ton of rock salt, and at -1 deg C, -5 deg C, and -10 deg C. Three application rates were tested for most chemicals. Prewetting salt slightly decreased its performance at -1 deg C and -5 deg C. However, all of the prewetted mixtures were effective at -10 deg C, unlike the dry rock salt. Melting was improved by increasing the ratio of liquid deicer to rock salt. Some mixtures had considerable variation in melting performance with temperature, but others remained quite consistent. Attempts to use reduced amounts of prewetted salts to achieve the same performance as a greater amount of dry rock salt gave unexpected results. Specifically some mixtures performed better when less of them were applied at -1 deg C and -5 deg C. No explanation for this was found.

Supplemental Notes:

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

Report/Paper Numbers:

E-C063,
SNOW04-005
SNOW04-039

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Luker, C
Rokosh, B
Leggett, T

Pagination:

p. 585-601

Publication Date:

2004-6

Serial:

Transportation Research Circular

Issue Number: E-C063
Publisher: Transportation Research Board
ISSN: 0097-8515

Conference:

Sixth International Symposium on Snow Removal and Ice Control Technology

Location: Spokane, Washington
Date: 2004-6-7 to 2004-6-9
Sponsors: Transportation Research Board; Washington State Department of Transportation; American Association of State Highway and Transportation Officials; and Federal Highway Administration.

Features:

Figures (8) ; References (6) ; Tables (2)

Uncontrolled Terms:

Prewetting

Subject Areas:

Highways; Maintenance and Preservation; I62: Winter Maintenance

Files:

TRIS, TRB

Created Date:

Jun 16 2004 12:00AM