http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
laboratory study comparing the effectiveness of three dust palliatives on unpaved roads
xii, 110 leaves : illustrations ; 28 cm.
Three different aggregate types were each treated by three commercially available dust palliatives and tested in the laboratory to quantify their resistance to erosion by wind and traffic. An untreated control specimen was also examined for comparison. Treated and untreated samples were subjected to a simulated wind velocity of 32 km/h (20 mpb) to examine resistance to wind erosion. In a second test, different samples were subjected to up to 1500 simulated traffic applications to measure resistance to traffic erosion. Material and environmental variables considered in the testing program include two curing temperatures, two curing periods, different palliative concentrations, and different application rates. A wind tunnel was fabricated during this research and used for measuring material loss due to wind erosion. A modified South African durability test was used to simulate erosion due to traffic. Results obtained indicate that the use of dust palliatives can significantly reduce the erosion of unpaved roads. It appears that the effectiveness of a particular palliative is based on soil type, traffic loads, environment, and compaction effort. A parametric analysis was conducted to establish the relative influence of the physical and chemical characteristics of a palliative on its performance and to establish a palliative selection rationale for a particular project. Results show that laboratory testing can be used as a decision-making tool to select an effective dust palliative for a particular soil type and environment.
Issued also on microfiche from Lange Micrographics.
Includes bibliographical references (leaves 108-109).