Angle of Material Recommended Material Density Repose ...

1 Angle of Material Recommended Material Density Repose group Max. Inclination Alfalfa, Meal 17 45 4 Alfalfa Pellets 41-43 20-29 2 Alfalfa Seed 10-15 29 2 Almonds, broken or whole 28-30 30-44 3 Alum, Fine 45-50 30-44 3 Alum.

2 Lumpy 50-60 30-44 3 Alumina 50-65 22 2 10-12 *Aluminum chips 7-15 45 4 Aluminum hydrate 18 34 3 20-24 Aluminum ore (see bauxite) Aluminum oxide 70-120 29 2 Aluminum silicate 49 30-44 3 Aluminum sulphate 54 32 3 17 Ammonium chloride, 45-52 30-44 3 crystalline Ammonium nitrate 45 30-44 3* Ammonium sulphate 45-58 44 3* (granular)

3 Antimony powder 60 30-44 3 Aplite 70-80 30-44 3 Arsenic, pulverized 30 20-29 2 Arsenic oxide 100-120 30-44 3 Asbestos, ore or rock 81 30-44 3 Asbestos, shred 20 25 45 4 *Ashes, black, ground 105 32 3* 17 Ashes, coal, dry, 3 inches 35 40 45 4 & under Ashes, coal, wet 3 inches 45-50 45 4 & under Ashes, fly 40-45 42 3 20-25 Ashes,gas-producer,wet 78 0 4 Asphalt, binder for paving 80-85 0 4 Asphalt, crushed, inch 45 30-44 3 & under Bagasse 7-10 45 4 Bakelite, & similar plastics 35-45 45 4 (powdered)

4 Baking Powder 40 50 35 3 Barite 180 30-44 3 Barium carbonate 72 45 4 Barium carbonate filter cake 72 32 3 Barium hydrate 62-65 43 3 Barium oxide 150-200 0 4 *Bark, wood refuse 10 20 45 4 27 Barley 37-48 23 2 10-15 Angle of Material Recommended Material Density Repose group Max.

5 Inclination Basalt 80-103 20-28 2 Bauxite, ground, dry 68 20-29 2 20 Bauxite, mine run 80-90 31 3 17 Bauxite, crushed, 3 inches 75-85 30-44 3 20 & under Beans, castor, whole 36 20-29 2 8-10 Beans, castor, meal 35-40 0 1 Beans, cocoa 30 45 35 1 Beans, navy, dry 48 29 2 Beans, navy, steeped 60 35-40 3 Beet pulp, dry 12-15 0 4 Beet pup, wet 25-45 0 4 Beets, whole 48 50 4 Bentonite.

6 Crude 35 40 42-44 3 Bentonite, 100 mesh 50 60 42 3 20 & under Benzine hexachloride 56 0 4 Bones, 34-40 45 4 Boneblack, 100 mesh 20-25 20-29 2 & under Bonechar 27-40 30-44 3 Bonemeal 50-60 30-44 3 Borate of lime 60 30-44 3 Borax, inch screenings 55-60 30-44 3 Borax, 3 inches and under 60-70 30-44 3 Borax, fine 45-55 0 2 Boric acid.

7 Fine 55 20-29 2 Boron 75 0 * Bran 10-20 30-44 3 Brewers grain, spent, dry 25-30 45 4 Brewers grain, spent, wet 55-60 45 4 Brick hard 125 0 4 Brick soft 100 0 4 Bronze chips, dry 30-50 44-57 4 Buckwheat 37-42 25 2 11-13 Calcium, carbide (crushed)

8 70 80 30-44 3 Calcium lactate 26-29 0 4 Carbon, activated, dry, fine 8-20 20-29 2 Carbon black, pelletized 20-25 25 2 Carbon black, powder 4-7 30-44 3 Carborundum, 3 inches 100 20-29 2 & under Casein 36 30-44 3 Cast Iron Chips 90-120 45 4 Angle of Material Recommended Material Density Repose group Max.

9 Inclination Caustic Soda 88 29-43 3 Cement, Clinker 75 95 30-40 3 18-20 Cement, Portland 72-99 30-44 3 20-23 Cement, Portland aerated 60-75 0 1 Cement, rock (see limestone) 100-110 0 3 Chalk, Fine- 100 mesh 65 75 0 2 Chalk, Lumpy 75-85 45 4 *Charcoal 18-25 35 3 20-25 Chips, paper mill 20-25 0 4 Chips, paper mill, softwood 12-30 0 4 Chips hogged, fuel 15-25 0 4 Chrome ore (chromite)

10 125-140 30-44 3 Cinders, blast furnace 57 35 3* 18-20 Cinders, coal 40 35 3* 20 Clay calcined 80-100 0 3 Clay, ceramic, dry, fines 60-80 30-44 3 Clay, dry, fines 100-120 35 3 20-22 Clay, dry, lumpy 60-75 35 3 18-20 Clover seed 48 28 2 15 Coal, anthracite, river, 60 35 3 18 or culm 1/8 and under Coal, bituminous, mined 50-54 45 4 24 50 mesh and under Coal, bituminous, mined 45-55 35 3 16 and sized Coal, bituminous, mined.