Liquid Calcium Chloride as Dust Control


Liquid Calcium Chloride is composed by organic compound, a mixture of Calcium and Chloride. I t is a salt with the chemical formula CaCl2. It is a colorless crystalline solid at room temperature, which is very soluble in water.


Liquid Calcium Chloride as dust Control

Liquid Calcium chloride has two properties that make it useful for dust control applications. First, it is hygroscopic. In other words, it draws moisture from the atmosphere and the environment and resists evaporation while working to stay in its natural liquid state. Second, calcium chloride is deliquescent, which means that the solid form can dissolve in a liquid by absorbing moisture from the atmosphere and the environment. As calcium chloride spreads to low-volume streets in spring, its ability to absorb moisture keeps the surface moist and prevents dust, usually during the summer.

Calcium chloride has other properties that contribute to the improvement and performance of unpaved roads. For example, calcium chloride has a stronger moisture film, a higher surface tension, a lower vapor pressure and a more reduced freezing point compared to ordinary water. The combination of these properties allows the chemical to keep unpaved surfaces moist and hold fine or fine particles in place. Besides, calcium chloride actually helps to bind aggregated particles, and as a result, the surface is compacted by circulation. Over time, calcium chloride slowly penetrates the surface by a few centimeters and has a stabilizing effect on the road. The more calcium chloride is used, the more stability is achieved. Finally, the lowest freezing point of the chemical helps unpaved roads resist frost growth in late fall and early winter.

Liquid Calcium Chloride as dust Control

Benefits of Liquid Calcium Chloride

Typically, a car driving on an unpaved road daily may produce 1 ton of dust per year if the road is covered with a dust cover. However, it retains a high percentage of fines that would otherwise be lost as dust. Midwest officials reported verbally on a reduction in roadside fines of up to 85%.

Since calcium chloride is hygroscopic, it contains fines instead. As a result, coarse aggregates tend to stay in place, eliminating their abrasive effect. This reduces the need for additional replacement and in some cases can be eliminated for long periods of time, depending on the average daily traffic on the road.

Because road materials stay in place, the frequency of the blade can be reduced by 25 to 75% with palliative dust. This, in turn, can reduce labor and equipment costs. In addition, less one-off repairs are required, which requires less workforce and material.


After all, less dust, less aggregate replacement and less shovel means less general repair work. This consumes less fuel and requires less equipment maintenance.

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