Comparison tests of liquid calcium and salt brine : a controlled experimental evaluation of rock salt pre-wetting liquids.

Details

• Creators:
  Thompson, Bill
• Corporate Creators:
  Maine. Dept. of Transportation. Transportation Research Division
• Subject/TRT Terms:
  • Winter maintenance
  • Brines
  • Halite
  • Deicing chemicals
  • Anti-icing
  • Liquids
  • Laboratory tests
  • Alternatives analysis
• Publication/ Report Number:
  42797
• Resource Type:
  Tech Report
• Geographical Coverage:
  Maine
• Corporate Publisher:
  Maine. Dept. of Transportation
• Abstract:
  The Maine Department of Transportation, like other state transportation agencies in the northern U.S., ; utilizes solid salt to maintain bare pavement condition on its roads and bridges during winter. In recent ; years more emphasis has been placed on anti-icing and deicing strategies. MDOT has also experimented ; with liquid deicers. Anti-icing strategies for winter storm treatments include early application of ice-melting chemicals to prevent the bonding (freezing-on) of ice and snow to the pavement. Research has ; shown that it is more cost-effective to treat the roads early to prevent this bonding. Several studies, ; including MDOT research in Cumberland & Yarmouth, show that 25-30% less salt (per lane mile) is ; required to return the roads to a bare condition using anti-icing and deicing strategies. Research has also ; shown that liquid chemicals such as salt brine and liquid calcium speed up the melting action because ; water is available to “jump start” the melting action. The mixing of liquid chemicals with solid chemicals ; has another beneficial effect. This procedure, called pre-wetting, reduces the bounce and scatter of the ; material as it exits the spreader behind the truck. This serves to keep the solid salt on the pavement and ; not scattered to the side of the road where it is wasted.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28464/dot_28464_DS1.pdf
• File Type:
  [PDF - 557.55 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:c7f7bc0162474dce82895e182aa8b137b825f260ce7536b465761a3f1c1e3cff