Answered: Compute the relative compaction

Engineering

Civil Engineering

Compute the relative compaction

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 5.7P

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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

A sand cone test has been performed in a recent compacted fill. The test results were as follows: Initial weight of sand cone + sand= 6.14 kg; Final weight of sand cone + sand = 1.94 kg; Weight of sand to fill cone = 0.96 kg; Weight of soil from hole + bucket = 5.65 kg; Weight of bucket = o.55 kg. For Moisture content test the result were as follows: Mass of empty moisture can= 23.11 g; Mass of moist soil + moisture can = 273.93 g; Mass of oven-dried soil + moisture can = 250.10 g. The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7%. Compute the relative compaction. a. 96.93 b. 90.21 c. 97.21 d. 95.43

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A sand cone test has been performed in a recently compacted fill. The test results were as follows: Initial weight of sand cone + sand = 6.14 kg Moisture Content Test: Final weight of sand cone + sand = 1.94 kg Mass of empty moisture can = 23.11 g Weight of sand to fill cone = 0.96 kg Mass of moist soil + can = 273.93 g Weight of soil from hole + bucket = 5.65 kg Mass of dry soil + can = 250.10 g Weight of bucket = 0.55 kg The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7 % a. Compute the volume of hole b. Compute the dry unit weight of soil. c. Compute the relative compaction.
A sand cone test has been performed in a recent compacted fill. The test results were as follows: Initial weight of sand cone + sand= 6.14 kg; Final weight of sand cone + sand = 1.94 kg; Weight of sand to fill cone = 0.96 kg; Weight of soil from hole + bucket = 5.65 kg; Weight of bucket = o.55 kg. For Moisture content test the result were as follows: Mass of empty moisture can= 23.11 g; Mass of moist soil + moisture can = 273.93 g; Mass of oven-dried soil + moisture can = 250.10 g. The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7%. Compute the volume of the hole in m3. a.0.00249 b.0.0145 c.0.00389 d.0.00781
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