The soil sample is being compacted. It has a Specific gravity of 2.70 Find the Following: a. Using the data below, Plot the Compaction curve (Use Excel). Show the solution in finding the Dry unit weight Water content (%) 4.2 5.1 7.8 10.1 12.2 Degree of Saturation, S (%) 19.8 28.9 60.1 69.8 74.6 b. Find the max dry unit weight and the optimum water content. Note: Show complete Solution. You can use Excel to find the curve but show the solution Topic: Soil Compaction Subject: Soil Mechanics

The soil sample is being compacted. It has a Specific gravity of 2.70 Find the Following: a. Using the data below, Plot the Compaction curve (Use Excel). Show the solution in finding the Dry unit weight Water content (%) 4.2 5.1 7.8 10.1 12.2 Degree of Saturation, S (%) 19.8 28.9 60.1 69.8 74.6 b. Find the max dry unit weight and the optimum water content. Note: Show complete Solution. You can use Excel to find the curve but show the solution Topic: Soil Compaction Subject: Soil Mechanics

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter6: Soil Compaction

Section: Chapter Questions

Problem 6.7P

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The following results are obtained from standard compaction test for a soil, if Gs = 2.5 Water Content (%) 6.2 8.1 9.8 11.5 12.3 13.2 Unit weight (kN/m3) 16.9 18.7 19.5 20.5 20.4 20.1 Required: 1- The optimum water content (Wc %) 2- The maximum dry unit weight ( dry ) 3- The void ratio (e) 4- Degree of saturation (S %) 5- Find the weight of water needed to be added to 1 m3 to reach 100% saturation.
Standard proctor compaction test results on a sandy clay (35% sand, 55% clay, and 10% silt), taken from a borrow pit, are given in the following table. The sandy clay in the borrow pit has a porosity of 65% and a water content of 5.2%. A highway embankment is to be constructed using this soil. (a) Specify the compaction (dry unit weight and water content) to be achieved in the field. Justify your specification. (b) How many cubic meters of borrow pit soil are needed for 1 cubic meter of highway fill? (c) How much water per unit volume is required to meet the specification? (d) How many truckloads of soil will be required for a 100,000 m3 highway embankment? Each truck has a load capacity of 22.5 m3 and regulations required a maximum load capacity of 90%. (e) Determine the cost for 100,000 m3 of compacted soil based on the following: Purchase and load borrow pit material at site, haul 2 km round-trip, and spread with 200 HP dozer = $15/m3; extra mileage charge for each km =…
9. The results of a Standard Proctoretest is tabulated as follows: (CHECK PICTURE) Determine the maximum dry unit weight of compaction Determine the void ratio at the optimum moisture content Gs = 2.68 Determine the optimum moisture content Determine the degree of saturation at the optimum moisture content
The ff are results of a field unit weight determination test Volume hole 0.0016 Mass of moist soil from 3.10kg Water content 12.20% Mas dry 19.50 Determine the relative compaction in %
8 The following are results of a field unit weight determination test using sand cone method: Volume of hole = 0.0019 m3 Mass of moist soil from hole = 3.24 kg Water content = 12.01% Max. dry unit weight from a laboratory compaction test = 19.70 kN/m3 Determine the relative compaction, in percent. Round off to two decimal places. Hint: Relative compaction = Field dry unit weight / Max dry unit weight (lab)
For a granular soil, the following are given:●● Gs = 2.6●● Liquid limit on the fraction passing No. 40 sieve 5 20●● Percent retained on No. 4 sieve 5 20 Using Eqs. (5.4) and (5.5) attached , estimate the maximum dry density of compaction and the optimum moisture content based on the modified Proctor test.
Plot the moisture density curve and determine the maximum dry unit weight of compaction and the optimum moisture content.