What is the difference between density, apparent density, bulk density, bulk density of materials

The density of the material, the apparent density.

What is the difference in bulk density.

Density, apparent density, and bulk density are mainly due to the different states in which the material is located.

Density is the unit volume of a material in an absolutely dense state.

quality. The so-called volume in the absolute dense state is the volume that does not contain any pores.

Apparent density represents the mass of a material per unit mesoform volume, including internal closed pores. Bulk density represents the mass of a material's unit macroscopic volume, including internal closed and open pores.

Bulk density refers to the mass of a bulk or powdery material per unit volume in a naturally stacked state. The stacked volume of the material refers to the volume of the container in a natural and loose state according to a certain method, including the volume of particles and the volume of the voids between the particles.

1 Density material per unit volume in an absolutely dense state.

mass = m v

- Density, g cm 3

m--- quality of the material, g

v--- volume of the material in an absolutely dense state, cm3

There are relatively few absolutely dense materials, and the material is usually ground into a fine powder to remove the internal pores, and its volume is determined with a density bottle after drying.

2. Apparent density.

The old known bulk density) is 0=m v o per unit volume of the material in the self-opening and leaky state

0 --apparent density, kg m 3

m--- material mass, kg

v o--- the volume of the material in its natural state, including the volume of the internal pores of the material in the modified state, m 3, also known as the apparent volume.

When the pores of a material contain water, its mass and volume change, so its water content must be indicated when determining the apparent density.

Unspecified usually refers to the apparent density in the dry state.

3. Bulk density.

Formerly known as loose bulk density).

The mass of granular or powdery materials (such as sand, stone, etc.) per unit volume in the natural stacked state is 0 1=m (v 0 1).

0 1--- bulk density, kg m 3

v 0 1 --- volume of material is rotten and stacked, m 3, measured by the volume of a certain volume, which contains the voids between the particles.

Here are the definitions of the three:

1.Density: Refers to the mass of an object per unit volume in an absolutely dense state. (Absolute compactness means that there are no pores inside the material).

2.Apparent density.

Refers to the mass of the material and the ratio of its apparent volume (apparent volume includes solid volume and internal closure.

pore volume) 3Bulk density.

Refers to the mass of the accumulation per unit volume (including the physical volume of the stacked object, the internal pores and the gaps between the stacked objects) under the specified filling conditions.

A general method for determining volume in three densities.

1.Density: In general, there are very few materials in the absolute dense state, so the wide lead of the object to be measured will be ground into a fine powder, and then the volume will be measured, so the finer the grinding, the more accurate the measurement results.

2.Apparent density: Because the wax should contain internal pores, the drainage method is used.

Determine the volume. 3.Bulk density: Because it is necessary to include internal pores and voids between accumulations, the volume is measured with a volumetric cylinder.