Deicer usage on concrete and asphalt pavements in Utah.
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2014-06-01
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Abstract:The objectives of this research were to 1) compile winter maintenance data for the Utah Department of
Transportation (UDOT) to directly compare concrete and asphalt pavements with regards to deicer usage and 2)
determine if there is a statistical difference in deicer usage on concrete and asphalt pavements. To this end, three
data sources were consulted for this research: Maintenance Management Quality Assurance (MMQA) database,
UDOT road database, and Google Maps. The final compiled data set prepared for analysis in this research
contained deicer quantities by deicer type, pavement surface areas by pavement material type, traffic, longitude,
latitude, and elevation data. The deicer data evaluated in this analysis represented the total quantities of each deicer
distributed during the 8-year period during which the MMQA database was used by UDOT.
Several multiple linear regression analyses were performed to determine if concrete or asphalt pavements
required different amounts of deicers, including salt, Redmond salt, brine, wetted salt, magnesium chloride, sand,
pre-mix, and wetted pre-mix, during the winter seasons evaluated in this research. From the results of the statistical
analyses, concrete proportion was statistically significant in models for three of the dependent variables, including
brine, wetted salt, and wetted pre-mix. However, neither the full nor the reduced regression model prepared for the
sum of all deicers had concrete proportion as one of the significant variables. The absence of concrete proportion as
an independent variable in these models shows that, on average, after correcting for differences in traffic volume and
pavement area, deicer usage in Utah is not affected by pavement type. Therefore, except in areas where applications
of brine, wetted salt, and wetted pre-mix are common, winter maintenance costs should not be a factor in the
determination of pavement type.
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