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Material Characteristics

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Material Density
[lbs/ft3]		 Angle of
Repose
(°)		 Angle of
Surcharge
(°)
Lower Upper
Alumina 50 65 22 10
Aluminium Oxide 70 120 29 15
Aluminium Silicate 49 49 44 5
Aluminium Sulphate 54 54 32 20
Aluminium, Chips 7 15 45 30
Ammonium Chloride 52 52 44 10
Ammonium Nitrate 45 45 44 25
Ammonium Sulphate 45 58 32 10
Anthracite 60 60 27 20
Asbestos 81 81 44 25
Asbestos, Shredded 19 25 45 30
Ash (Coal, dry) 40 45 42 30
Asphalt 80 86 45 30
Barytes 180 180 44 20
Basalt, (50-80mm) lump 105 110 0 25
Bauxite, (75mm) lump 75 85 44 20
Bauxite, ground dry 68 68 29 20
Bauxite, R.O.M. 80 90 31 20
Bentonite, 100 Mesh 50 60 42 20
Bentonite, Crude 34 40 44 20
Bicarbonate of Soda 41 41 32 20
Borax, lumps 60 65 44 20
Brick, hard 125 125 42 30
Brick, soft 100 100 42 30
Carbon, powder 4 7 44 10
Cast Iron, chips 130 200 45 30
Cement, clinker 75 95 40 25
Cement, Portland 94 94 44 25
Cement, Portland loose 60 84 40 20
Cement, Portland slurry 91 91 0 5
Chalk, (50-80mm) lump 80 86 45 10
Chalk, 100 Mesh 65 75 45 25
Charcoal 17 25 35 25
Clay, dry loose lumps 62 75 45 25
Clay, dry fines 100 120 35 20
Clinker 37 96 35 25
Coal, coking pulverized 30 37 0 10
Coal, bituminous, R.O.M. 45 55 38 25
Coal, lignite 45 55 38 25
Coal, anthracite 60 60 27 20
Coal, bituminous 100 Mesh 50 54 45 25
Coal, bituminous 12mm 43 50 40 25
Coke, breeze 25 35 45 22
Coke, run of oven 25 30 30 25
Coke, loose 23 35 44 30
Coke, petroleum calcined 35 45 44 20
Compost 30 50 44 25
Concrete, 150mm lump 110 150 0 15
Concrete, wet 110 156 10 5
Concrete, slag 90 110 30 20
Concrete, blocks 130 150 0 0
Copper Ore, crushed 130 156 44 25
Copper Sulphate 75 85 31 20
Cork, granulated 12 15 40 30
Cryolite 110 110 44 20
Cryolite (50-80mm) lump 100 105 44 20
Cryolite, dust 75 90 44 5
Diatomaceous earth 11 14 44 25
Dolomite, lump 90 100 0 0
Earth, dry 69 81 45 20
Earth, wet mud 100 109 0 5
Earth, excavated dry 70 80 35 20
Earth, wet 100 110 45 20
Epsom Salts 40 50 44 25
Feldspar, (30-80mm) lump 91 109 34 20
Feldspar, 12mm screenings 70 85 38 20
Flour, wheat 41 41 0 10
Fluorspar, (38-75mm) lump 110 120 46 30
Fluorspar, 12mm screenings 35 105 45 30
Flue dust, boiler dry 34 41 20 5
Foundry sand, loose 81 91 0 15
Foundry slag 70 100 44 15
Garbage, household 50 50 0 0
Granite, (38-60mm) lump 85 90 29 10
Granite, (80-150mm) lump 85 90 29 10
Granite, 12mm screening 80 90 29 10
Granite, chips 95 100 44 15
Granite, flakes 40 40 44 10
Gravel 90 100 40 20
Gravel, dry 91 100 40 25
Gravel, wet 100 125 40 20
Guano, dry 70 70 29 10
Gypsum (12-75mm) 70 80 30 10
Gypsum, (80-150mm) lump 70 80 30 20
Gypsum, dust 60 70 42 30
Illmenite 140 140 44 10
Iron, ore 100 200 35 25
Iron Oxide, pigment 25 25 40 30
Iron, chips 125 125 30 30
Iron, ore crushed 135 150 30 20
Iron, pellets 131 175 35 10
Kaolin clay 62 62 35 0
Kaolin, ground 42 56 45 5
Kaolin, 100 mesh 42 56 45 30
Kaolin, <75mm lumps 63 63 35 20
Lactose 32 32 44 10
Lead, ore 200 270 30 15
Lead, arsenate 72 72 45 25
Lead, oxides 60 150 45 25
Lime, fine 60 66 43 0
Lime, ground < 3mm 60 60 43 30
Lime, hydrated 32 40 42 25
Limestone, (50-80mm) lump 90 95 45 25
Limestone, agricultural 3mm 68 68 44 10
Limestone, crushed 85 90 35 25
Magnesium chloride 33 33 40 25
Magnesium Sulphate 70 70 44 20
Manganese dioxide 80 80 44 20
Manganese, ore 125 140 40 20
Manganese, Sulphate 70 70 44 10
Marble, crushed <12mm 90 95 44 10
Mica, (50-80mm) lump 91 95 0 5
Molybdenite, powdered 107 107 40 20
Nickel, ore 80 150 44 35
Paper, pulp 40 62 19 5
Paper, pulp pellets 12 25 0 10
Phosphate, rock 75 85 40 25
Phosphate, ground 51 51 45 30
Potash, salts 80 80 29 10
Potassium carbonate 51 51 29 10
Potassium chloride, pellets 120 130 44 15
Potassium nitrate 76 76 29 10
Potassium Sulphate 42 48 45 30
Pyrites Iron, 50-75mm 135 145 29 20
Pyrites, pellets 120 130 44 10
Quartz, 38-75mm 85 95 35 25
Quartz, 50-80mm lump 91 95 35 25
Quartz, dust 70 80 40 5
Quartz, screenings 80 90 35 15
Rock, soft excavated 100 110 44 20
Rubber, pellets 50 55 35 20
Rubber, reclaimed 25 30 32 18
Salt, dry course 40 55 35 20
Salt, dry fine 70 80 25 5
Sand, foundry 90 100 44 30
Sand, foundry shakeout 90 100 39 25
Sand, littoral damp 110 130 45 25
Sand, littoral dry 90 110 35 20
Sand, siliceous dry 125 125 29 10
Sandstone, chips 85 90 44 20
Sawdust 10 13 36 5
Sewage, sludge 40 50 29 10
Shale, broken 90 100 29 10
Shale, crushed 85 90 39 25
Slag, blast furnace, crushed 80 90 25 10
Soda, ASM 55 65 32 25
Sugar, beet, pulp dry 12 15 35 30
Sugar, beet, pulp wet 25 45 35 30
Sugar, cane knifed 15 18 45 30
Sugar, powdered 50 60 44 10
Sugar, raw cane 55 65 45 20
Sugar, beet wet 55 65 30 20
Sulphur, crushed <12mm 50 60 44 15
Sulphur, <75mm 80 85 44 15
Talc, 12mm screenings 80 90 29 20
Talc, powder 50 60 20 10
Wheat 45 48 28 10
Wood, chips 10 30 45 30
Zinc, concentrates 75 80 25 5
Zinc, ore crushed 160 160 38 20
Zinc, oxide heavy 30 35 55 10
Zinc, oxide light 10 15 45 10