A Proctor test was performed on a soil. For the water content and total wet density data below: a. Plot the moisture-dry density curve b. Find the maximum dry density and optimum moisture content c. Determine the moisture range permitted if a contractor must achieve 95% relative compaction d. What volume of water, in ft3, must be added to obtain 1 yd3 of soil at the maximum dry density if the soil is originally at 10% water content? Water Content Wet Density (%) (pcf) 10 100 13 110 16 122 18 127 20 130 22 128 25 119

A Proctor test was performed on a soil. For the water content and total wet density data below: a. Plot the moisture-dry density curve b. Find the maximum dry density and optimum moisture content c. Determine the moisture range permitted if a contractor must achieve 95% relative compaction d. What volume of water, in ft3, must be added to obtain 1 yd3 of soil at the maximum dry density if the soil is originally at 10% water content? Water Content Wet Density (%) (pcf) 10 100 13 110 16 122 18 127 20 130 22 128 25 119

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 5.16P

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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

Can you help with part d below? A Proctor test was performed on a soil. For the water content and total wet density data below:
a. Plot the moisture-dry density curve
b. Find the maximum dry density and optimum moisture content
c. Determine the moisture range permitted if a contractor must achieve 95% relative compaction
d. What volume of water, in ft³, must be added to obtain 1 yd³ of soil at the maximum dry density if the soil is originally at 10% water content?

Water Content Wet Density

(%) (pcf)

10 100

13 110

16 122

18 127

20 130

22 128

25 119

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Step 2: Determine the dry density.

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Step 3: (a) Plot the moisture dry density curve.

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Step 4: (d) Determine the additional volume of water.

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