The results of a field unit weight determination test performed by means of the sand cone method are as follows: Calibrated dry unit weight of Ottawa sand = 104 pcf Weight of Ottawa sand to fill the cone = 0.258 lb Weight of jar + cone + sand (before use) = 13.21 lb Weight of jar + cone + sand (after use) = 6.2 lb Weight of moist soil from hole = 7.3 lb Moisture content of moist soil = 11.6% Determine the dry unit weight of compaction in the field. 0 0 0 0 0 0

The results of a field unit weight determination test performed by means of the sand cone method are as follows: Calibrated dry unit weight of Ottawa sand = 104 pcf Weight of Ottawa sand to fill the cone = 0.258 lb Weight of jar + cone + sand (before use) = 13.21 lb Weight of jar + cone + sand (after use) = 6.2 lb Weight of moist soil from hole = 7.3 lb Moisture content of moist soil = 11.6% Determine the dry unit weight of compaction in the field. 0 0 0 0 0 0

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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Following are the results of a field unit weight determination test performed by means of the sand cone method:• Calibrated dry unit weight of Ottawa sand = 104 lb/ft3• Weight of Ottawa sand to fill the cone = 0.258 lb• Weight of jar + cone + sand (before use) = 13.4 lb• Weight of jar + cone + sand (after use) = 6.39 lb• Weight of moist soil from hole = 7.3 lb• Moisture content of moist soil = 11.6%Determine: Dry unit weight of compaction in the field.
Following are the results of a field unit-weight determination test performed on the same soil by means of the sand cone method: -Calibrated dry unit weight of Ottawa sand = 15.4019 kn/m3 -Calibrated weight of Ottawa sand to fill the cone = 5.3496 N -Weightof jar + cone + sand (before use) = 74.451 N -Weightof jar + cone + sand (after use) = 46.886 N -Weight of moist soil from hole = 29.509 N -Moisture content of moist soil = 10.21% DETERMINE AND SHOW COMPLETE SOLUTION 1. Dry density of compaction in the field in kg/cu.m.
Following are the results of a field unit weight determination test performed bymeans of the sand cone method:• Calibrated dry density of Ottawa sand = 104 lb/ft3• Mass of Ottawa sand to fill the cone = 0.258 lb• Mass of jar + cone + sand (before use) = 13.21 lb• Mass of jar + cone + sand (after use) = 6.2 lb• Mass of moist soil from hole = 7.3 lb• Moisture content of moist soil = 11.6%Determine: Dry unit weight of compaction in the field.
The following are the results of a field unit weight determination test performed on the soil by means of the sand cone method. Calibrated dry density of Ottawa sand = 1570 kg/m3 Calibrated mass of Ottawa sand to fill the cone = 0.545 kg Mass of jar + cone + sand (before use) = 7.59 kg Mass of jar + cone + sand (after use) = 4.78 kg Mass of moist soil dug from hole = 3.007 kg Water content of moist soil = 10.2% Max dry unit weight = 19 kN/m3 Find the dry unit weight in kN/m3.
A sand cone test has been performed in a recently compacted fill. The test results were as follows: Initial weight of sand cone + sand = 6.14 kg Moisture Content Test: Final weight of sand cone + sand = 1.94 kg Mass of empty moisture can = 23.11 g Weight of sand to fill cone = 0.96 kg Mass of moist soil + can = 273.93 g Weight of soil from hole + bucket = 5.65 kg Mass of dry soil + can = 250.10 g Weight of bucket = 0.55 kg The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7 % a. Compute the volume of hole b. Compute the dry unit weight of soil. c. Compute the relative compaction.
As part of a quality controlprogram, the field inspection engineer conducted a sand cone test to determine the field density. The following data were recorded using the sand cone method. • Calibrated dry density of Ottawa sand = 1667 ??/?3• Mass of Ottawa sand to fill the cone = 0.117 kg• Mass of jar + cone + sand (before use) = 6.1 kg• Mass of jar + cone + sand (after use) = 2.83 kg• Mass of moist soil from hole = 3.35 kg• Moisture content of moist soil = 16.1%a. Determine the dry unit weight of compaction in the field. (ANS: 14.97kn/m3) PLS ANSWER NUMBER 2 WITH COMPLETE SOLUTION 2. What is the relative compaction in the field if the maximum dry unit weight in the laboratory is 15.93 ??/?3?
Refer to the soil in Problem 4.5. Using the Casagrande plasticity chart, graphically estimate the shrinkage limit of the soil as shown in Figure 4.22. 4.5 The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site. Liquid limit tests: Plastic limit test: PL = 19.3% a. Draw the flow curve and determine the liquid limit. b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.
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%)
A sand cone test has been performed in a recent compacted fill. The test results were as follows: Initial weight of sand cone + sand= 6.14 kg; Final weight of sand cone + sand = 1.94 kg; Weight of sand to fill cone = 0.96 kg; Weight of soil from hole + bucket = 5.65 kg; Weight of bucket = o.55 kg. For Moisture content test the result were as follows: Mass of empty moisture can= 23.11 g; Mass of moist soil + moisture can = 273.93 g; Mass of oven-dried soil + moisture can = 250.10 g. The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7%. Compute the volume of the hole in m3. a.0.00249 b.0.0145 c.0.00389 d.0.00781
A sand cone test has been performed in a recent compacted fill. The test results were as follows: Initial weight of sand cone + sand= 6.14 kg; Final weight of sand cone + sand = 1.94 kg; Weight of sand to fill cone = 0.96 kg; Weight of soil from hole + bucket = 5.65 kg; Weight of bucket = o.55 kg. For Moisture content test the result were as follows: Mass of empty moisture can= 23.11 g; Mass of moist soil + moisture can = 273.93 g; Mass of oven-dried soil + moisture can = 250.10 g. The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7%. Compute the relative compaction. a. 96.93 b. 90.21 c. 97.21 d. 95.43
A sand cone test has been performed in a recent compacted fill. The test results were as follows: Initial weight of sand cone + sand= 6.14 kg; Final weight of sand cone + sand = 1.94 kg; Weight of sand to fill cone = 0.96 kg; Weight of soil from hole + bucket = 5.65 kg; Weight of bucket = o.55 kg. For Moisture content test the result were as follows: Mass of empty moisture can= 23.11 g; Mass of moist soil + moisture can = 273.93 g; Mass of oven-dried soil + moisture can = 250.10 g. The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7%. Compute the dry unit weight of soil in kN/m3. a. 15.7 b. 19.8 c. 18.7 d. 16.8
An in-place density determination (in-place unit weight) is made for the sand in a borrow pit using a balloon- type density apparatus. The damp sample dug from a test hole is found to weigh 8.5 lb. The volume of the test hole is 0.065 ft3. From these data, compute the wet unit weight of the soil.