An evaluation of construction procedures for placement of dust palliatives was conducted to determine which method would give the best long-term effectiveness for mitigating fugitive dust on roads in arid climates. Several types of conventional construction equipment were employed, including a motor grader, a vibratory steel-wheeled compactor, and a rotary mixer in various scenarios. A commercially available acrylic copolymer emulsion was used as the dust palliative for each of the construction methods. Ten total test sections, measuring 152 metres long, were constructed and evaluated at 30-day intervals for a total evaluation period of 90 days. The dust palliative was applied at a rate of 3.6 litres per square metre using both topical and blending applications. Results from the investigation show that topical treatments with the dust palliative were equally or, in some cases, more effective than anticipated and provided a more durable solution. Data show nearly 100 per cent reduction in dust after 90 days for selected procedures. (a) For the covering entry of this conference, please see ITRD abstract no. 0612AR242E.
Abstract