Calcium Chloride: The Most Effective Dust Control Agent
Why Is Dust Control Important?
• Road officials must contend with higher maintenance costs because a dusty road is a deteriorating road. Once the fine material is lost, the load-bearing aggregate will soon follow. Loss of fines and aggregate results in ruts, potholes, and washboards that require costly spot repairs and frequent bladings to keep the road in acceptable condition.
• Road users face a serious safety issue of reduced visibility and also the prospect of loose gravel causing cracked windshields, chipped paint, and/or broken headlights.
• Local residents must contend with larger quantities of dust drifting into their living environment, reducing their quality of life and increasing their chances of developing respiratory health problems.
Why Use Calcium Chloride for Dust Control?
• Calcium chloride attracts moisture from the air, keeping the road damp even under hot, dry conditions. The moisture film provides a cohesive force that binds aggregate particles together, resulting in a hard and compact surface.
• A beneficial residual effect accumulates with consistent application year after year. As calcium chloride becomes established deeper in the road base, stability improves and frost damage is prevented.
• For those on a tight budget, calcium chloride application can decrease blading frequency by about 50 percent, as well as increase the interval between re-graveling from 7 to 14 years.
Properties of Liquid Calcium Chloride
Appearance: Clear/colorless liquid
Assay: 28 to 38% by weight CaCl2
Crystallization Temperature: -38°F to 42.1°F
Specific Gravity @ 68°F: 1.264 to 1.378
Bulk Density: 10.53 to 11.49 lb/gal
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