![]() The density of quartz is around 2.65 g/cm 3 but the (dry) bulk density of a mineral soil is normally about half that density, between 1.0 and 1.6 g/cm 3. The bulk density of soil depends greatly on the mineral make up of soil and the degree of compaction. In contrast, particle density is an intrinsic property of the solid and does not include the volume for voids between particles. ![]() For this reason, the bulk density of powders is usually reported both as "freely settled" (or "poured" density) and "tapped" density (where the tapped density refers to the bulk density of the powder after a specified compaction process, usually involving vibration of the container. For example, a powder poured into a cylinder will have a particular bulk density if the cylinder is disturbed, the powder particles will move and usually settle closer together, resulting in a higher bulk density. īulk density is not an intrinsic property of a material it can change depending on how the material is handled. The total volume includes particle volume, inter-particle void volume, and internal pore volume. In materials science, bulk density, also called apparent density or volumetric density, is a property of powders, granules, and other "divided" solids, especially used in reference to mineral components ( soil, gravel), chemical substances, ( pharmaceutical) ingredients, foodstuff, or any other masses of corpuscular or particulate matter ( particles).īulk density is defined as the mass of the many particles of the material divided by the total volume they occupy.
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