Temperature Effect on Salt

Jackson Township Highway Department

TEMP FAHRENHEIT	LBS. OF ICE MELTED BY 1 LB OF SALT	EFFECTIVENESS
30 Degrees	46.3#	100%
25 Degrees	14.4#	31%
20 Degrees	8.6#	18.5%
15 Degrees	6.3#	13.6%
10 Degrees	4.9#	10.5%
5 Degrees	4.1#	8.8%
0 Degrees	3.7#	8.0%
-6 Degrees	3.2#	6.9%

NOTE THE LARGE DROP OF EFFECTIVENESS FROM 30 DEGREES TO 25 DEGREES (100% DOWN TO 31%). BRINE IS ADDED TO THE SALT AS A CATALYST TO MAKE IT MORE EFFECTIVE AT LOWER TEMPERATURES. BRINE IS ADDED TO DRY ROADWAY PRIOR TO A SNOW AND ICE EVENT TO PREVENT INITIAL SLIPPERY CONDITIONS AT THE ROAD SURFACE.

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