ICE-INHIBITING BITUMINOUS LAYERS WITH "SALT CONCRETE"

To achieve ice-inhibiting on pavement, a specially prepared thawing agent is added to the bituminous mixture. As the vehicles pass over and wear down the road, miniscule amounts of this substance are released onto the roadway. The thawing agent then forms what is referred to as "salt concrete" made up of approximately 50 percent sodium chloride. For ice-inhibiting surface treatments and ice-inhibiting bituminous sludges, we use salt concrete of a corresponding fraction size (up to 30 percent rock); for ice-inhibiting asphaltic concrete, the fraction 2-4 (up to 15 percent rock). The ice-inhibiting coatings are effective to -3 degrees C. These ice-inhibiting coatings are designed for critical (under-cooled) sections of road subject to frequent formation of glare ice.