I dimly remember hearing of using water for this but not more elaborate things like CaCl2...
According to þe olde CRC handboke, you can depress the freezing point farther with calcium chloride (about 50°) than with sodium chloride (21° or so). The temperature does reach -21C/-7F in some arable (and supposedly habitable) places. Or so I am told by travelers from distant lands.
I suppose that doubling the cost of the salt (from about $5 to about $10, if you go to Lowe's and buy a 50lb sack of it, which seems to be about the amount they're talking of) isn't actually a big deal, whereas losing a tire to screwing up just once in your career would set you back more than you'd ever save in salt.
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timeasmymeasure
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Date: 2005-08-27 06:58 pm (UTC)According to þe olde CRC handboke, you can depress the freezing point farther with calcium chloride (about 50°) than with sodium chloride (21° or so). The temperature does reach -21C/-7F in some arable (and supposedly habitable) places. Or so I am told by travelers from distant lands.
no subject
Date: 2005-08-27 07:07 pm (UTC)