Which soil has maximum dry density?

Soil Mechanics A clayey soil has a maximum dry density fo 16 kN/m3 and optimum moisture content of 12\%. A contractor during the construction of core of an earth dam obtained the dry density 15.2 kN/m3 and water content 11\%.

What is MDD of soil?

Maximum Dry Density (MDD) is the dry density of soil corresponding to Optimum Moisture Content. Effect of compactive effort: Increase in compactive effort or the energy expended will result in an increase in the maximum dry density and a corresponding decrease in the optimum moisture content.

What are the approximate values of OMC and MDD for coarse grained and fine grained soils?

For coarse and fine-grained soils, average values are 8 to 15 and 17 to 36 respectively as given in Annex 3. At OMC, the soil is broadly 90\% saturated depending upon type of soil, meaning that about 10\% of the void space is occupied by air. Warning: The OMC should always be less than the shrinkage limit.

What type of soil you will recommend for foundation fine grained or coarse grained soils?

Coarse-grained soil and fine-grained soil are two different types of soil that can be identified based on their texture or ‘feel’ and particle size….Differences Between Coarse-Grained and Fine-Grained Soil.

Coarse-grained soil	Fine-grained soil
Coarse-grained soil feels gritty when touched by hand	It feels smooth, greasy and sticky when touched by hand

What is maximum dry density?

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

How do you find the maximum dry density?

V = volume in cc of the mold. The dry density in g/cc corresponding to the maximum point on the moisture content/dry density curve should be reported as the maximum dry density to the nearest 0.01.

What is a 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 OMC and MDD of soil?

Optimum moisture content/maximum dry density (OMC/MDD) – when placing soils as fill materials, it is important to achieve suitable compaction, primarily in order to reduce the susceptibility of a soil to settlement.

What is the effect of the soil type on the OMC and MDD?

It was found that the fine particle size has a major effect on OMC and MDD. And the effect mostly influences by the percentage of clay. Soil with a higher percentage of clay and silt, usually have more pore space and have a lower bulk density than sandy soil.

Is fine or coarse soil better?

The fine-grained soil feels smooth and sticky when touched by hand. The coarse-grained soil does not retain water and has more permeability. The fine-grained soil has very less permeability and it can retain water. There will be no change in the volume of the coarse-grained soil with a change in the moisture content.

What is coarse soil?

Coarse grained soils are defined as those soils whose individual grains are retained on a No. 200 (0.075 mm) sieve. Grains of this size can generally be seen with the naked eye, although a hand held magnifying glass may occasionally be needed to see the smallest of the grains. Gravel and sand are coarse grained soils.

What is soil dry density?

Dry density of soil is defined as the ratio of Mass of solids to the total volume of the soil. It is represented by. To obtain relationship between the moisture content and dry density, multiply the numerator and denominator of expression of dry density with “M” which is mass of soil sample.

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