Calcium Chloride Pellets for Dust Control

Dust control is a problem with some dirt roads in rural areas.

Many roads and driveways in rural areas are unpaved. Wind and heavy traffic can rake up dust from the dirt on these roads, creating dust clouds that can quickly become a nuisance. Calcium chloride is one possible solution.

Types

All dirt and gravel roads release some dust, but the extent and severity of the problem varies widely, depending on the mineral composition of the dirt and local weather patterns. Dust is typically a more common problem in arid regions. Whether calcium chloride pellets are the best option will depend on the severity of the problem, the traffic volume and the cost of other alternatives.

Function

Calcium chloride is highly hygroscopic, meaning it rapidly absorbs and retains water. By trapping moisture, calcium chloride keeps the road surface moist, reducing the amount of dust kicked up by wind or traffic. Calcium chloride pellets are usually applied with tailgate spreaders or similar devices.

Considerations

For calcium chloride dust control to be effective, the road will usually require annual treatment. The road surface must be stabilized and moistened before application, then soaked afterwards to dissolve all the pellets. It's important to make sure the road has adequate drainage and enough fine material to bind the calcium chloride.

References

• University of New Hampshire: Road Dust Control with Calcium Chloride
• EPA: Storm Water Management Fact Sheet, Dust Control
• EPA: Dust Control and Stabilization