Question

: Which method of soil test is preferred as an Engineer to determine the density of soil in the construction site? What is the difference in the procedure in doing the soil test for determining the dry density and bulk density of soil?

Answer 1

To determine density of soil in construction site Core cutter method is generally used

For bulk density, core cutter is inserted in the ground so that soil should enter in the core cutter then the soil mass present in the core cutter should be weigh. Then calculate bulk density by dividing mass of soil by volume of core cutter which is predetermined (generally 1000cm³)

For dry density, we have to dry the soil mass and then weigh. After drying the soil mass in oven weigh it and calculate dry density by dividing dry mass of soil by volume of core cutter.

Than

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