A sand cone test was conducted for quality control during the compaction of sandy clay. The data are as ollows. Calibration to find dry unit weight of the standard sand Mass of Proctor mold 4178 grams Mass of Proctor mold and sand 5609 grams Volume of mold 0.00095 m Calibration of sand cone Mass of sand cone apparatus and jar filled with sand 5466 grams Mass of sand cone apparatus with remaining sand in jar 3755 grams Sand cone test results Mass of sand cone apparatus and jar filled with sand 7387 grams Mass of excavated soil 2206 grams Mass of sand cone apparatus with remaina sand in jar 3919 grams Water content of excavated soil 9.2% (a) Determine the dry unit weight. (b) The standard Proctor maximum dry unit weight of the sandy clay is 178 kNim' at an optimum wa- ter content of 10%. The specification reoquires 95% Proctor dry unit weight at acceptable water contents ranging from 9% to 10.8%. Is the specification met? Justify your answer.

A sand cone test was conducted for quality control during the compaction of sandy clay. The data are as ollows. Calibration to find dry unit weight of the standard sand Mass of Proctor mold 4178 grams Mass of Proctor mold and sand 5609 grams Volume of mold 0.00095 m Calibration of sand cone Mass of sand cone apparatus and jar filled with sand 5466 grams Mass of sand cone apparatus with remaining sand in jar 3755 grams Sand cone test results Mass of sand cone apparatus and jar filled with sand 7387 grams Mass of excavated soil 2206 grams Mass of sand cone apparatus with remaina sand in jar 3919 grams Water content of excavated soil 9.2% (a) Determine the dry unit weight. (b) The standard Proctor maximum dry unit weight of the sandy clay is 178 kNim' at an optimum wa- ter content of 10%. The specification reoquires 95% Proctor dry unit weight at acceptable water contents ranging from 9% to 10.8%. Is the specification met? Justify your answer.

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 5.14P

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A sand-cone in place unit test was conducted on the field during the construction of a proposed embankment. The following data were obtained. moisture content=12.8% weight of sand to fill the funnel=320 g weight of wet soil from test hole=750 g unit weight of sand=15.4 kN/m3 weight of sand used to fill test hole and funnel of sand-cone device=870 g a) compute the wet unit weight of soil (Ans. 21.14 kN/m3) b) compute the dry unit weight of the compacted soil (Ans. 18.74 kN/m3) c) compute the relative compaction in the field if the maximum dry unit weight of the soil is 21.3 kN/m3. (Ans. 87.98%)
Need complete solution. Need fast! The maximum and minimum dry densities of a sand were determined in the laboratory to be 1509 kg/m3 and 1673 kg/m3, respectively. In the field, if the relative density of compaction of the same sand is 86.83%, what is the relative compaction (in percent)? Round off to two decimal places.
Situation 4 - Three samples of loose sand were tested under consolidated undrained (CU) conditions. Test results are given below:Undrained angle of friction = 35°Deviator Stress = 260 kPaPore Water Pressure = 30 kPaDetermine the drained angle of friction in degrees. Round off to three decimal places.
Situation 4 - Three samples of loose sand were tested under consolidated undrained (CU) conditions. Test results are given below:Undrained angle of friction = 35°Deviator Stress = 260 kPaPore Water Pressure = 30 kPaDetermine the drained angle of inclination of failure plane in degrees. Round off to three decimal places.
Calculate % Silt using the following values; a. Weight of soil= 50 g b. HR reading at 40 sec.= 25 c. Temp at 40 sec= 25 oCd. HR at 2 hrs= 16 e. Temp at 2 hrs= 26 * A. 17.28 B. 17.25 C 17.22 D. 17.19
1. Why Stokes Law only applies if the grain diameter is between 0.0002 mmup to 0.2mm?2. How to get the corrected meniscus value?3. In the sieve analysis practicum, why should the soil from the hydrometer experiment be filtered?first with filter no. 200 ASTM?
A sand cone in place unit test was conducted on the field during the construction of the embanklment in CALAX. The following data were obtained in the field: Moisture content of soil from the test hole+ 12.8% ; Weight of sand to fill the funnel(cone) = 320g; Weight of weight soil from the test hole= 750g; Unit weight of sand= 15.4 kN/m3 and Weight of sand used to fill the test hole and thefunnel of sand-cone device=870 g. Compute for the relative compaction (in percent) in the field if the maximum dry unit weight of the soil is 21.30 kN/m3. a. 94 b. 90 c. 88 d. 92
A sand cone in place unit test was conducted on the field during the construction of the embanklment in CALAX. The following data were obtained in the field: Moisture content of soil from the test hole+ 12.8% ; Weight of sand to fill the funnel(cone) = 320g; Weight of weight soil from the test hole= 750g; Unit weight of sand= 15.4 kN/m3 and Weight of sand used to fill the test hole and thefunnel of sand-cone device=870 g. Compute for the relative compaction (in percent) in the field if the maximum dry unit weight of the soil is 21.30 kN/m3.
A sand cone in place unit test was conducted on the field during the construction of the embanklment in CALAX. The following data were obtained in the field: Moisture content of soil from the test hole+ 12.8% ; Weight of sand to fill the funnel(cone) = 320g; Weight of weight soil from the test hole= 750g; Unit weight of sand= 15.4 kN/m3 and Weight of sand used to fill the test hole and thefunnel of sand-cone device=870 g. Compute for the relative compaction (in percent) in the field if the maximum dry unit weight of the soil is 21.30 kN/m3. a.94 b.88 c.92 d.90 With FBD if necessary
Explain in detail Maximum Dry Density and Optimum Moisture Content of soil? Explain in 5 sentences how you are going to interpret the results of Proctor’s Compaction test?
Read the question carefully and give me both a&b right solutions. A proctor compaction test in the laboratory on a borrow pit soil gives maximum unit weight of 19 kN/m3 and optimum water content of 11.5%. The bulk unit weight and water content of the soil in the borrow pit are 17.2 kN/m3 and 8.2%, respectively. A highway fill is to be constructed using this soil. The specifications require the fill to be compacted to 95% Proctor compaction. (a) What is the additional weight of water per unit volume required to bring the moisture content to the optimum value to achieve 95% Proctor compaction? (b) How many truckloads of borrow pit soil will be required for a 100,000 m3 highway embankment - assuming each truck has a capacity of 10 m3 ?
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)...