Effect of Oil Used for Dust Control on Engineering Properties of Stored Wheat

Bulk and particle densities; emptying and filling angles of repose; and friction coefficients against parallel grain plywood, perpendicular grain plywood, steel-trowelled concrete, wood-floated concrete, smooth galvanized steel and corrugated galvanized steel, were determined for clean wheat and wheat containing 5 or 10% grain dust, by weight, when treated with 0, 0.05, 0.10, 0.15, 0.20% canola or mineral oil using laboratory units. The changes in physical properties were used to highlight the implications for prediction of lateral and vertical wall loads on storage structures. The most severe case for calculation of lateral wall loads was the clean-untreated wheat for all surfaces except smooth galvanized steel where dirty-oil-treated grain, regardless of type of oil, was critical.