What is meant by dry density?

It refers to the density of the soil, when it is taken in the dry state. The soil mass is commonly a mixture of air, water and soil solids. The dry density refers to the soil solids. It is otherwise called as dry unit weight of soil.

What is dry density of soil formula?

Calculate the dry density using the following equation: Dry Density (pcf) = Wet Density (pcf) – Moisture Content (pcf). 9.1. Report the moisture content of the soil to the nearest 0.1 percent and the moisture content of aggregate base materials to the nearest 0.1 pound per cubic foot.

What is Max dry density of soil?

The maximum peak point of the soil compaction curve obtained is called the Maximum dry density value. The water content corresponds to this point is called the Optimum water content (O.W.C) or optimum moisture content (O.M.C).

What is unit of dry density?

Bulk density (g/cm3) = Dry soil weight (g) / Soil volume (cm3) Bulk density is usually expressed in megagrams per cubic metre (Mg/m3) but the numerically equivalent units of g/cm3 and t/m3 are also used (1 Mg/m3 = 1 g/cm3 = 1 t/m3) (Cresswell and Hamilton, 2002).

What does 95\% compaction mean?

95\% compaction means that the soil on the construction site has been compacted to 95\% of the maximum density achieved in the lab. It means that when you conduct compaction test(in the laboratory) on a small soil sample of a particular site. You get some value of maximum dry unit weight at certain moisture content.

Why dry density of soil is important?

Maximum dry density (MDD) of stabilized soils is generally an important factor in determining the soil suitability or unsuit- ability for stabilization. The properties of a compacted soil mixture are influenced more by its moisture content than by the other reasons.

What is MDD and OMC?

MDD – Maximum Dry Density. MWD – Maximum Wet Density. OMC – Optimum moisture Content. Zero Air Voids – is the relationship between dry density and corresponding moisture contents, for a specific particle density, assuming that all of the voids are completely filled with water.

What is maximum dry density?

The dry density obtained by the compaction of soil at its optimum moisture content. Ref: Hammond.

What is the purpose of maximum dry density?

Maximum dry density (MDD) of stabilized soils is generally an important factor in determining the soil suitability or unsuit- ability for stabilization.

What is dry density used for?

The dry density increases as the added moisture lubricate the soil particles and enable greater compaction from the same applied energy. Once the optimum moisture content is exceeded, the water starts to displace the soil in a given volume, and the dry density decreases.

Why is maximum dry density important?

What does it mean to have 100\% compaction?

Proctor Dry Density of 100 percent represents the maximum density achieved in the lab with the particular sample using a specific amount of compaction force and ideal moisture content. Standard Proctor and Modified Proctor use different weights and will achieve different dry densities for the same sample.

What is the optimum moisture content of soil?

Generally, soil moisture will range from 10\% to 45\%, but can be higher during and after watering. The water in your soil is stored on the surface of the soil particles, as well as in the pores, which are holes or gaps between individual soil particles.

What is the maximum dry density?

Definition of maximum dry density. The dry density obtained by the compaction of soil at its optimum moisture content. Click here to see list of references, authorities, sources and geographical terms as used in this glossary.

What is formula for dry density?

dry density = wet density divide by (1 + moisture content as a fraction). e.g., Moisture content is 10\%. Wet density is 110 pcf, then the dry density is 110/1.1 = 100 pcf. Please let us know here why this post is inappropriate.

What is optimum moisture content?

The optimum moisture content is the water content for a given level of compactive effort that yields the maximum dry density. It is an important concept for field monitoring of soil compaction because it is necessary to have the moisture content close to the optimum moisture content to get a specified high degree of compaction. Good luck.