For the best control of road dust, we apply topical solutions to the surface of the subject area. We use pressurized spray equipment, distributor trucks, spray trailers, or hand sprayers.
After that, the surface is left 24 hours for material to set. Then, we resume the traffic.
For especially dry sites we often recommend a pre-treatment with water. Moisture is needed to bond with the dust control agent.
We often use calcium chloride (CaCl2). This is a hygroscopic salt that draws moisture from the air to form a solution in road gravel. It keeps road surfaces constantly damp, even in hot, dry conditions. The moisture helps to bind particles together to create a hard and compact road surface. Because it penetrates several inches into the road base, CaCl2 also contributes to overall road surface stability.