Answered: a sample of silty sand in a 150 mm…

Engineering

Civil Engineering

a sample of silty sand in a 150 mm diameter mold. The maximum dry unit weight is 19.6 kN/m3 and optimum water content

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Compaction

Section: Chapter Questions

Problem 5.15P

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Concept explainers

Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.

Question

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A modified proctor compaction test is performed on a sample of silty sand in a 150 mm diameter mold. The maximum dry unit weight is 19.6 kN/m3 and optimum water content is 11%. If the specific gravity solids is 2.65, draw the three-phase diagram of the sample in the mold and calculate all volumes and weight for that sample. What is the degree of saturation?

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