Laboratory Report

Laboratory Report

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Lab Report

The mechanical examination calculates the magnitude of the specks present in the soil, expressed as a share of total dry mass. Two procedures are widely applied to the dispersion of soil in particle size: The

• sieve analysis: a diameter greater

than 0.075 mm for particle sizes.

• Hydrometer analysis: analyzes 0,075

mm in diameter for particle size.

The sieve analysis involves shaking the soil sample with a series of screens with smaller openings. The dry density and optimal water content values are different for each type of soil. Increasing quantities of water are applied to 4 to 6 sections of a dried gravel fragment. Each drawn up part is merged with prophylaxis or mechanical soil compactor in a compaction mold and then weighed and corrected to the moisture content. As added moisture lubricates the soil sections, dry density increases, and the energy applied is more compact. After exceeding the optimal humidity content, water pushes the soil to a certain quantity, and the dry density decreases. The methods used in this study to determine the dry density and the soil moisture content of nuclear density testing, rubber balloon testing, and sand cone tests are the methods used. The results from such field trials are compared with Proctor’s tests of the same soil set in the laboratory, and the percentage of the compactness is expressed. As Proctor’s tests differ widely with soil types, the best results are obtained with laboratory samples taken from the same source for the field project. The soil reaches its highest dry unit weight at an optimal water content (wopt) for a given compact energy, at a high water volume. When water is applied to it, the compressibility of a dehydrated earth increase; furthermore, it must be remembered that the maximum strength for a given soil is reached dry from optimal while the lowest hydraulic conductivity is only achieved with optimal humidity. As compact effort is increased, βd max increases, and wopt decreases. A lower amount of water content is enough to saturate a thicker sample.  The time frame for concluding the experiment is outlined in the Gantt chart below.

Gantt Chart Time Schedule for Experiment

References.

Kodikara, J., Islam, T., & Sounthararajah, A. (2018). Review of soil compaction: History and recent developments. Transportation Geotechnics, 17, 24-34.