Bulk density is the dry mass of the solids (M sub t) / total volume (V sub t)
Particle density is bulk density (P sub b) / 1 minus total porosity (1-theta).
1.in piping arrangement.
Dry density (DD) is related to the moisture content (MC) using the following: DD = DB / (1+MC) Where DB is the bulk density of the material.
This is the mass of aggregate that would fill a container of 1m3 capacity.
The density of crushed concrete varies depending on the gradation and quantity of impurities (e.g. asphalt and other) but can be estimated at 1900-1950 kg/m^3.
K(bulk modulus of elasticity)=-{[Pressure x volume]/change in volume}
If you were to graph particle size and porosity, it would be a constant slope (horizontal line).Porosity is not affected by particle size.
Bulk density is more meaningful in agriculture because it incorporates the pore space between soil particles, which affects root development, water infiltration, and aeration. Particle density, on the other hand, only accounts for the density of soil particles without considering the spaces between them. Therefore, bulk density gives a more accurate representation of soil structure and its impact on plant growth.
A value for porosity can alternatively be calculated from the bulk density ρbulk and particle density ρparticle: Normal particle density is assumed to be approximately 2.65 g/cm3, although a better estimation can be obtained by examining the lithology of the particles.
Bulk density is more useful because it accounts for the spaces between particles in a material, reflecting how closely packed the material is in real-world applications. Particle density only considers the intrinsic density of the material itself and does not provide information on how the material behaves in a bulk form. Therefore, bulk density is more relevant for practical purposes such as determining flow properties, storage requirements, or compaction characteristics.
The particle density is equal to the bulk density when there is no pore space or voids between the particles. This means that the bulk density (mass of the material per unit volume including both solid material and voids) will be the same as the particle density (mass of the particles per unit volume excluding any void spaces).
bulk density depend on that material from which soil formed. so maximum bulk density depend on particle density of that mineral. Therefore,we can only tapped the soil upto perticle density. so maximum bulk density may be occur at equal to paricle density.
Concerning the second Question: "Can you find bulk density with just this info?"Purely on mathematical insight and analysis:Yes, you should be able to find the bulk density of dry soil, given the 'dry overall' and the 'particle' densities.When wet, there is not enough 'given'Also some should be known about the (or your) definition of porosity
Factors that affect bulk density include particle size, shape, and compaction, moisture content, and the arrangement of particles within a given volume. Additionally, the nature and density of the material itself, as well as the presence of air gaps or pores, can influence bulk density.
Bulk density is a major physical property in designing the logistic system for biomass handling. The size, shape, moisture content, individual particle density, and surface characteristics are few factors affecting the bulk density. This research investigates the effects of true particle lengths ranging from 6 to 50 mm and moisture contents ranging from 8% to 60% wet basis (wb) on the bulk density of wheat straw and switchgrass. Three types of particle densities of straw and switchgrass measured were: a hollow particle density assuming a hollow cylindrical geometry, a solid particle density assuming a solid cylindrical geometry, and a particle density measured using a gas pycnometer at a gas pressure of 40 kPa. The bulk density of both loose-fill and packed-fill biomass samples was examined. The calculated wet and dry bulk density ranged from 24 to 111 kg m-3 for straw and from 49 to 266 kg m-3 for switchgrass. The corresponding tapped bulk density ranged from 34 to 130 kg m-3 for straw and 68 to 323 kg m-3 for switchgrass. The increase in bulk density due to tapping the container was from 10% for short 6-mm particles to more than 50% for long 50-mm particles. An equation relating the bulk density of stems as a function of moisture content, dry bulk density, and particle size was developed. After the validation of this bulk density equation, the relationship would be highly useful in designing the logistics system for large-scale transport of biomass to a biorefinery. The bulk density and particle density data of uniform particles would be important, if straw and switchgrass is used for pulping and paper making.
To calculate the percent of air content in a soil sample, you need to determine the volume of air in the soil and divide it by the total volume of the sample. This can be done by measuring the bulk density of the soil and the particle density, then subtracting the particle density from the bulk density to get the volume of air. Finally, divide the volume of air by the total volume and multiply by 100 to get the percentage.
Bulk density accounts for the presence of air spaces, organic matter, and other types of particles in the soil, providing a better representation of soil porosity and compaction, which are important for root growth and water retention. Particle density alone does not consider these factors and may not accurately reflect the overall soil quality for plant growth in an agricultural setting.
Bulk density = dry weight / volume, then by knowing the dry weight and bulk density we can calculate the volume.