Gravel Roadway Maintenance in Cold Regions

Résumé du livre

Many surface treatments are available for the treatment of gravel roadways in cold regions. Primary concerns are the control of dust, stabilization of the surface to avoid rutting and potholes, and prevention of adverse effects of spring breakup. Calcium chloride has been the primary product added to Alaska's gravel roadway surfaces for this purpose. Several treatments are reviewed, including calcium chloride, Iignosulfonate, asphalt emulsion, Earth Material Catalyst Squared, Road OyI, sodium montmorillonite, and no additive. From a cost standpoint, the least expensive surface appears to be the "no treatment" option, although calcium chloride and EMC Square are also cost competitive and may provide a superior surface. When other factors such as re-graveling, road user costs, safety and environmental effects are included, it is unlikely that "no treatment" will be the preferred option. A spreadsheet for comparing alternative costs has been developed and is available for analyzing cost, effort, application frequency and application density data for any particular situation. The design of a field demonstration program for applying several treatment alternatives and monitoring their long-term cost and performance completes the report