Engineer design tests of dust-control materials and emplacement equipment
Culpepper, Moody M.; Wilvert, Warren A.
Miscellaneous PaperAbstract: This report describes and presents the results of engineer design tests (EDT) of two dust-control materials, a polyvinyl acetate (PVA) water emulsion and a cationic asphalt-neoprene emulsion (CANE), and two distributors, one pneumatic and one mechanical, that were used to apply the PVA and CANE. Both distributors were used to apply the PVA and CANE with no reinforcing, with fiberglass scrim reinforcing, and with prechopped fiberglass reinforcing to sand and clay soils in an intermediate climate. The materials were allowed to cure for 4 hr after placement and were then subjected to the simulated airblast of a CH-47 helicopter and a C-130 aircraft and to traffic by 1/4- and 2-1/2-ton vehicles. Only minor deficiencies in the PVA and CANE, i.e., instability in storage, excessive runoff, and tackiness after 4 hr curing time, were observed during testing. The pneumatic distributor sprayed both materials with ease, but the mechanical distributor encountered difficulty in spraying the CANE. Based on the results of the investigation reported herein, the following recommendations are considered warranted: (1.) Action should be initiated to correct the deficiencies in PVA and CANE. (2.) Fiberglass scrim should be used as reinforcing material until equipment capable of placing prechopped fiberglass at the required rates and in the required quantities can be devised and developed. (3.) Investigations for improving the distributor pump should be continued. (4.) All edges of film-forming dust-control materials that may be exposed to blast should be anchored by burying. (5.) Film-forming dust-control materials that are to be subjected to traffic should be reinforced. NOTE: This file is large. Allow your browser several minutes to download the file.
U.S. Army Engineer Waterways Experiment Station.Engineer Research and Development Center (U.S.)
Cationic asphalt-neoprene emulsion; Dust control; Polyvinyl acetate; Spraying equipment; United States. Army Materiel Command.
Approved for public release; distribution is unlimited.