Difference between bulk density and true density?

Answer 1

Bulk density is to find in Wikipedia:

http://en.wikipedia.org/wiki/Bulk_density

Real density is here to find:

http://www.istone.ntua.gr/Training_courses/wp1/real_density.html

Apparent density is here to find:

http://www.bulk-online.com/Forum/showthread.php?threadid=6440

Answer 2

Bulk density refers to the mass of a material per unit volume including the voids present, while true density refers to the mass of a material per unit volume excluding any voids or pores. Bulk density is typically lower than true density due to the inclusion of void spaces. True density gives a more accurate measure of the material's mass per unit volume.

Answer 3

bulk density is the mass per unit volume. this volume includes also the inter granular spaces i.e., the porosity factor.

true density on the other hand measures mass per unit true volume of the grains. this volume does not include the pore spaces in between the granules.

there are various equipments e.g. G-DenPyc 2900 to determine the porosity.

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· Bulk Density: Powder in a container or bin expressed in mass unit per volume.

True Density:

The mass per unit volume of a solid material expressed in grams per cubic centimeter.

Usually adopts gas displacement principle (Gold APP Instruments) to determine them.

Answer 4

Imagine a ball, now imagine lots of balls in a box. There are lots of gaps between the balls when they are in the box. The density is the weight of an object divided by the volume it takes up. The term bulk means a collection of a material. The ball by itself will have a certain density and the balls in the box will have a lower density because you take into account the air in the box too.

Answer 5

Usually no. The bulk density will be lower than the "true" density of the material, since the bulk density averages in void spaces (filled with, presumably, a low-density material like air) between the individual particles making up the material. Can use G-DenPyc X900 principle to test it.