Alternative strategies can eliminate rock salt in snow removal plan

Pre-spreading salt brine and using potassium formate may allow facility managers to eliminate rock salt

One way to cut the amount of salt used is by spreading salt brine before the storm hits, rather than waiting until the snow is on the ground and trying to melt it with rock salt, according to an article from Building Operation Management on the FacilitiesNet website.

 The idea is to “get away from de-icing and toward anti-icing,” said Daniel Gilleland, training manager with SnowEx, adding that an application of brine can reduce the amount of chloride needed to melt snow on a parking lot by about 90 percent.

The salt itself doesn’t melt anything; rather, it has to turn to brine in order to work, Gilleland said. “When you apply rock salt, it sits there for some length of time before it turns to brine,” he says. Applying salt as brine accelerates this process.

Moreover, the brine can be applied in advance, as it doesn’t wear off. Instead, it “just dries, and waits for the moisture to come,” Gilleland said. Many departments of transportation apply brine to bridges and steep inclines ahead of storms, to head off slipperiness.

Michigan State University, for instance, uses a liquid de-icer derived from beet juice to melt snow on roads and walkways. According to the university, “the organic de-icer is also more effective under colder weather conditions than traditional salt because it melts the snow and ice at lower temperatures.”

Read the article.

September 11, 2018

Topic Area: Maintenance and Operations

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