Density is a basic and important material property. While the true density of a pure substance is easily conceptualized and well-understood, it is not the only density that is important for engineers and material scientists. It is also worthwhile to measure an effective density for bulk materials as packed, transported, or used. For granular, porous, and irregularly shaped materials, this effective density can vary significantly from the true density based on the definition of volume and state of packing that is relevant to the process being studied.
A material’s envelope density is its mass divided by its volume when volume is determined including that of pore spaces within the material. Bulk density also is defined as material mass divided by volume, but the volume is that into which the mass of material may be confined. In other words, this volume includes interstitial (or void) spaces among the objects, as well as pore spaces inside the objects. From such measurements, Micromeritics’ GeoPyc 1360 can determine envelope density and bulk density, as well as other data, such as percent porosity.
Density is a basic and important material property. While the true density of a pure substance is easily conceptualized and well-understood, it is not the only density that is important for engineers and material scientists. It is also worthwhile to measure an effective density for bulk materials as packed, transported, or used. For granular, porous, and irregularly shaped materials, this effective density can vary significantly from the true density based on the definition of volume and state of packing that is relevant to the process being studied.
A material’s envelope density is its mass divided by its volume when volume is determined including that of pore spaces within the material. Bulk density also is defined as material mass divided by volume, but the volume is that into which the mass of material may be confined. In other words, this volume includes interstitial (or void) spaces among the objects, as well as pore spaces inside the objects. From such measurements, Micromeritics’ GeoPyc 1360 can determine envelope density and bulk density, as well as other data, such as percent porosity.
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