Sources of Cohesion (Binding Mechanisms) Solids Bridges Attraction Forces -Mineral bridges -van der Waal's -Chemical reaction -Electrostatics -Partial melting -Magnetic -Binder hardening Interfacial forces -Crystallization -Liquid bridges -Sublimation -Capillary forces Interlocking forces
摩擦性 休止角-注入法 Grain Bin ll Grain Surface at Filing Grain Surface at Emptying ○X Bin Floc -Angle of bin wall from horizontal -Filing angle of repose.usually less than emptying angle of repose -Emptying angle of repose.usually taken os the internal angle of frictior Flgure 1:Angle of Response
颗粒度 水分 The Angle of Repose 35 fine sand dry s sand 40 coarse sand moist sand angular 45 pebbles 35883ma water saturated windward leeward sand