Question 4 In a standard compaction test on a soil (grain specific gravity of 2.67) the following results were obtained: Water content (%) Mass (g) 12.8 14.5 1890 2130 15.6 2200 16.8 2210 19.2 2160 The volume of the mould is 1000 cm (i) Determine the maximum dry density obtainable under standard test conditions and the water content at which this occurs. (ii) Using the above results, specify a detailed quality control plan for field compaction of a highway project.

Question 4 In a standard compaction test on a soil (grain specific gravity of 2.67) the following results were obtained: Water content (%) Mass (g) 12.8 14.5 1890 2130 15.6 2200 16.8 2210 19.2 2160 The volume of the mould is 1000 cm (i) Determine the maximum dry density obtainable under standard test conditions and the water content at which this occurs. (ii) Using the above results, specify a detailed quality control plan for field compaction of a highway project.

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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A fine-grained soil has 60% clay with LL 220%, PL 545%, and a natural water content of 6%. A standard Proctor test was carried out in the laboratory and the following data were recorded Diameter of mold = 101.40 mmHeight of mold = 116.70 mmMass of mold = 4196.50 gram Specific gravity, Gs = 2.69 a) Determine the maximum dry unit weight and optimum water content.b) If the desired compaction in the field is 95% of the standard Proctor test results, what values of dry unit weight and water content would you specify?c) Explain why you select these values.d) What field equipment would you specify to compact the soil in the field, and why?e) How would you check that the specified dry unit weight and water content are achieved in the field?
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