Problem Set No. 2. Modified Proctor Test is performed in a soil that is classified as CL and has a specific gravity of 2.65. The test results obtained are as follows: Ywet (kN/m³) 19.0 17.7 20.3 20.9 20.4 w (%) 5.4 8.7 11.6 15.9 19.1 Plot the compaction curve. Shows the zero-air-void curve on the plot. Determine the maximum dry unit weight and the optimum moisture content. What is the void ratio and degree of saturation at the maximum dry unit a. b. C. weight.

Problem Set No. 2. Modified Proctor Test is performed in a soil that is classified as CL and has a specific gravity of 2.65. The test results obtained are as follows: Ywet (kN/m³) 19.0 17.7 20.3 20.9 20.4 w (%) 5.4 8.7 11.6 15.9 19.1 Plot the compaction curve. Shows the zero-air-void curve on the plot. Determine the maximum dry unit weight and the optimum moisture content. What is the void ratio and degree of saturation at the maximum dry unit a. b. C. weight.

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 5.5P

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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
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arrow_forward Question 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 gramSpecific 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? I Need The Answer of part (d) and (e)...
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.
The Table 4 shows the results of a Standard Proctor Compaction test. Based on the information provided, determine the following values. The maximum dry unit weight and the OMC.The degree of saturation at the maximum dry density if Gs = 2.70.What is the dry unit weight and the moisture range at 95% relative compaction (RC)?The degree of saturation at the maximum dry density if Gs = 2.70. Table 4: Results of a standard Proctor compaction test Trial No. 1 2 3 4 5 6 Moisture content, w (%) 6.2 8.1 9.8 11.5 12.3 13.2 Bulk unit weight (kN/m3) 16.9 18.7 19.5 20.5 20.4 20.1 Dry unit weight (kN/m3) 15.9 17.3 17.8 18.4 18.2 17.8
1. Draw the compaction curve using the following given data from a standard Proctor test. 2. From the compaction curve you drawn, determine the Optimum Moisture Content and the Maximum Dry Unit Weight.
Determine the compaction effort of Standard Proctor Test in English unit Method A. (ft − lb/ft^3)
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?
It has been anticipated that the soil under the proposed dam is contaminated, and needs to be removed and backfilled to a depth of 2.5 feet. A Standard Proctor compaction test was conducted on soil from a borrow pit, with the results shown below right. Based on the results: a) Plot the Proctor curve for the borrow soil. b) Find the optimum water content and max. dry unit weight for the borrow soil. c) Determine whether the unit weight of the top layer can be met by compacting to 95% of maximum, and what the range of moisture content for that unit weight is. d) If we borrow soil from a pit with a void ratio of 0.71, determine how much soil we need to borrow to backfill below the dam to match the in-situ void ratio of the top layer of soil.
The results of a standard compaction test are shown in the Figure below. The specific gravity of this soil deposit is equal to 2.65. Calculate the air content in % that would be required to achieve the maximum dry unit weight. (answer tolerance = 6%).