Measuring Dispersal and Tracking of Anti-Icing and Deicing Chemicals by Using In-Situ Spectral Data – Phase I
Snow and ice accumulation on pavement reduces roadway surface friction, resulting in diminished vehicle maneuverability, slower travel speeds, reduced roadway capacity, and increased crash risk. Though the use of chlorides and other freeze-inhibiting substances have been shown to reduce these negative factors, methods to quantify and analyze snow and ice remediation methods, as well as the imposed loss of material, are needed to allow state and municipal agencies to better allocate winter maintenance resources and funding. The use and application of chlorides, sand, and their related mixtures and derivatives have proved to be highly effective for controlling or removing the development of ice on the roadway surface. Yet if the amount of salt in solution becomes too dilute, then it no longer retains the capacity to control the development of, or to melt, ice on the roadway and may prove to be more detrimental by allowing the previously melted material to refreeze with a smoother (i.e., more slippery) surface state. An automated and efficient method to quantify the amount of imposed loss of anti-icing and deicing materials has yet to be established. The goal of Phase 1 of this project was to determine to what extent winter roadway surfaces can be analyzed by using spectrometry to determine the coverage and longevity of various types of applications in a laboratory setting. By using a systematically paired analysis of changes in spectrometric curves as solution concentrations changed, relationships were generated that detected changes in deicing and anti-icing compounds reliably.