Dust measurement to determine effectiveness of rural dust strategies.

摘要: Dust produced from unpaved roads in rural Alaska is impacting the quality of life many Alaskan and other villages cold regions. Not only does dust emanating cause respiratory ailments, but also impacts subsistence food storage sources as well safety since visibility on village streets. Loss fine particles greatly road surfaces creating increased maintenance costs. Replacing fines content costly owing to lack suitable material equipment villages. The expectation for communities that paving their will solve problems. In some cases this may be possible. environments, however, or cost prohibitive sources, unsuitable foundation materials inability maintain improved preclude pavement an option. A option control palliatives institutional controls. However, there little consensus how identify measure effectiveness, economics, environmental approaches are compatible with lifestyle common remote Our objective ongoing study evaluate different methods used Alaska. These include various synthetic polymer type palliatives, calcium chloride, This paper presents current efforts quantify qualify effectiveness measures. Of methods, Department Transportation Public Facilities (AKDOT&PF) has most experience chloride (CaCl2). Salts such CaCl2 (magnesium another salt by others) adsorbing retaining moisture aggregate surfacing material. compounds effective at suppressing when relative humidity greater than around 30 40 percent (Rushing Tingle, 2006). During morning hours typically high temperatures low, retained treated surface. As rise drops afternoon, losses evaporation surface reduced comparison untreated surfaces. Synthetic polymers comprise several promote soil particle binding. Several products provided vendors under names EK-35, EnviroKleen, Durasoil among others. compositions these proprietary. fraction loftable aggregating action palliative. Anyone who driven experienced effect vehicle speed quantity lofted vehicle. Control speeds roadways possible one least expensive means dust.