Diffractive optical elements 75 years on: from micro- ... - diffractive optical element
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This only works when there is a small amount of water present during application, so it’s common for roads and sidewalks to be coated with brine – a road salt and water mixture – when cold weather is in the forecast. A good application before a winter storm can decrease the amount needed to de-ice the roads after the event.
With many Americans still living under wintery conditions, we’re betting you’re grateful for the road salt and its benefits!
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Road salt lowers the freezing point of water, making it more difficult for water to freeze and create dangerous driving conditions.
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Not a lot. Road salt – or rock salt – is halite, the mineral form of sodium chloride (NaCl) as it is naturally mined. Table salt is just a purified version of the same mineral.
Road salt still contains mineral impurities that can make it grey or brown in color. It may include additives like sodium hexacyanoferrate and sugar that help trucks deliver it to roadways without caking.
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The effectiveness of road salt to prevent accidents and injuries is undeniable. The American Highway Users Alliance found that applying it to the roads reduces accidents up to 93%.
Road salt is the most popular option for de-icing, but occasionally sand and other chemicals can be used, particularly on sidewalks. Among the producers of the product is American Chemistry Council member Occidental Chemical Corporation which has a whole business sector devoted to Calcium Chloride and its many uses. Check out their website!