What is the difference between bulk density and tapped density?
The bulk density of a material is the ratio of the mass to the volume (including the inter-particle void volume) of an untapped powder sample. The tapped density of powders or granulates is an increased bulk density attained after mechanically tapping a cylinder containing the sample.
What is loose bulk density?
1) Loose bulk density :- it is the ratio of mass of loosely packed fine aggregate without Tamping or rooded to the total volume they occupy.
How do you calculate bulk density in tapped out?
The tapped density is calculated as the mass divided by the final tapped volume, it was found that the average tapped density of the arginine sample was 0.715 g/mL.
What does bulk density indicate?
Bulk Density. Bulk density is an indicator of soil compaction. It is calculated as the dry weight of soil divided by its volume. This volume includes the volume of soil particles and the volume of pores among soil particles.
Why is tapped density important in pharmaceuticals?
The bulk and tapped density of pharmaceutical powders are often measured for processability. The tapped density is measured for two primary purposes: (i) the tapped value is more reproducibly measured than the bulk value, and (ii) the “flowability” of a powder is inferred from the ratio of these two measured densities.
What is the use of tapped density?
The tapped density is a very popular measure for powder characterization because of both the simplicity and the rapidity of the measurement. The ability of a powder sample to pack under taps gives a measure of the powder cohesiveness which can be linked to its flowability.
What is the bulk density of concrete?
The fine aggregate used for used to make concrete has bulk density is between 1540-1680 kg/m3.
What is bulk density of tablet?
Bulk density of tablet is ratio of a tablets (Mass) to its bulk volume (volume) Measurement with graduated cylinder. Take a 100 no of tablets & fill in 200 ml graduated cylinder.
How do you increase tap density?
Assuming all other parameters such as particle shape are constant, greater size will cause greater tapped and apparent density. This is because larger particles have lesser specific surface, which implies less friction. Hence the particles flow more easily and the powder becomes more compact on tapping.
How is bulk density related to porosity?
Bulk density typically increases as the ratio of solids in a soil increases, and conversely decreases as the ratio of solids decreases. Looked at from the porosity perspective, bulk density increases as pore space decreases. The relationship of bulk density and porosity is reciprocal.
What is the purpose of determining the bulk volume and bulk density of powders?
Bulk density The bulk density of a powder is the ratio of the mass of an untapped powder sample and its volume including the contribution of the interparticulate void volume. Hence, the bulk density depends on both the density of powder particles and the spatial arrangement of particles in the powder bed.
What is the difference between bulk density and apparent density?
Apparent density is the bulk density of the powder. It provides the mass per unit volume of loose packed powders. A change in apparent density can also indicate a change in the surface roughness of the powder; for example, atomization satellites may reduce apparent density.
How to measure bulk density?
Bulk density is typically measured by gently introducing a known sample mass into a graduated cylinder, and carefully leveling the powder without compacting it. The apparent untapped volume is then read to the nearest graduated unit.
What is bulk density apparatus?
Bulk Density Apparatus: Bulk density apparatus are apparatus used to measure the bulk density of bulk powders. Funnel method ( Volumetric method) bulk density apparatus are widely used. It is to use a funnel to free flow powders into a volume calibrated density cup to measure the bulk density.
What is tap density?
Tap Density Definition. The tapped density is an increased bulk density attained after mechanically tapping a container containing the powder sample. The tapped density is obtained by mechanically tapping a graduated measuring cylinder or vessel containing the powder sample.