Specific properties of the solids

Particle density

• The particle density of the particulate solids or powered is the density of the particles that make up the powder.
• The mass per unit volume of soil particles usually expressed in grams per cubic centimeter.

Bulk density

• Bulk density is defined as the volume of the pores created between particles and pores that exist within individual particles.

Sphericity

• The shape of the particle is expressed in terms of sphericity.
• Sphericity is independent of particle size
• Sphericity is the ratio of the surface area of a spherical particle having the same volume as a particle under consideration to that of the surface area of the particle.

Equivalent diameter (Deq)

• It is defined as the diameter of a sphere of equal volume as that of the particle.
• It is denoted by D_eq

Specific surface area

• It is defined as a surface area per unit mass
• The SI units are m²/kg

Volume surface mean diameter

• It is defined as the diameter of a sphere that has the same volume/surface area ratio as a particle of interest

Mass mean diameter