Laboratory compaction test results on a clayey soil are listed in the table below.Moisture content (%) Dry unit weight (kN/m³)614.80817.45918.521118.91218.51416.9The following are the results of a field unit weight determination test on the same soil with the sand cone method:Calibrated dry density of Ottawa sand = 1,560 kg/m³Calibrated mass of Ottawa sand to fill the cone = 0.565 kgMass of jar + cone + sand (before use) = 7.59 kgMass of jar + cone + sand (after use) = 4.78 kgMass of moist soil from hole = 2.85 kgMoisture content of moist soil = 15.2%Determine:a. Dry unit weight of compaction in the field.(Enter your answer to three significant figures.)Ya =]kN/m³b. Relative compaction in the field.(Enter your answer to two significant figures.)R =|%

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Laboratory compaction test results on a clayey soil are listed in the table below. Moisture content (%) Dry unit weight (kN /m³) 14.80 17.45 9 18.52 11 18.9 12 18.5 14 16.9 The following are the results of a field unit weight determination test on the same soil with the sand cone method: Calibrated dry density of Ottawa sand = 1,560 kg/m³ Calibrated mass of Ottawa sand to fill the cone = 0.565 kg 6,

Laboratory compaction test results on a clayey soil are listed in the table below. Moisture content (%) Dry unit weight (kN /m³) 14.80 17.45 9 18.52 11 18.9 12 18.5 14 16.9 The following are the results of a field unit weight determination test on the same soil with the sand cone method: Calibrated dry density of Ottawa sand = 1,560 kg/m³ Calibrated mass of Ottawa sand to fill the cone = 0.565 kg 6,

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter4: Plasticity And Structure Of Soil

Section: Chapter Questions

Problem 4.8P

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(b) Classification tests for the determination of the particle size distribution of a soil produced the following results: Particle Size % finer (mm) 99 2.36 80 1.3 63 0.6 33 0.2 10 0.075 3 0.02 Then using cone penetrometer for Liquid Limit test, the results were recorded as follows. Cone penetration 15.9 17.7 19.1 20.3 22.5 (mm) Water 32.6 42.9 51.6 59.8 66.2 content (%) While the plastic limit test conducted for the same soil recorded as below:- Test No. 1 2 3 Wet soil 10.01 11.23 9.72 Dry soil 8.02 9.01 7.72 SKAA 1713 4 i) Plot the grain size distribution curve on the log graph that has been provided (Figure 2b). Calculate the uniformity coefficient, Cu and the coefficient of gradation, C, for the soil sample. Determine the plastic limit, the liquid limit and the plasticity index of the soil. Plot the graph to help you obtain the results (if necessary). ii) iii)
3. A dry sand is placed in a container 9 cm3. The dry weight of the sample is 15 g. Water is carefully added to the container so as not to disturbed the condition of the Sample. When the container is filled the combined weight of soil and water is 18 g. Determine the following: a) Void ratio of sample in the container b) Porosity c) Water constant d) Specific gravity of the soil particle e) Saturated unit weight f) Dry unit weight
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.
Sand cone equipment is used to perform a field density test on a compacted earth fill. • Soil sample dug from the test hole = 20.60 N • Dry weight of soil sample = 17.92 N Ottawa sand used to fill the hole weighs 16.05 N and is known to have a density of 15.74 kN/m3. Determine the in-place dry density of the tested soil. Answer:
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 37.90 N. The volume of the test hole is 0.00184m2. A. Compute the wet unit weight. B. This soil is to have a water content of 15%. Compute the dry unit weight of the soil. C. Compute the specific gravity of the soil if it has a void ratio of 0.423
1. Sand cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. Ottowa sand is used in the cone and is known to have a bulk density of 100 pcf. a. From the information given below, determine the in-place dry unit weight of the tested soil, and the water content. Soil sample dug from test hole wet weight = 4.62 lb Dried Weight of soil sample = 4.02 lb Weight of Ottowa Sand (Sand Cone) to fill test hole = 3.60 lb b. Determine the percentage of compaction of the tested soil if the laboratory moisture unit weight curve indicates a dry unit weight of 115 pcf and optimum moisture content of 13 percent.
The table below shows the results from the specific gravity (S.G.) test performed in a soil laboratory including twenty samples of sand. Determine the Coefficient of Quartile Variation. * Number of Specific Gravity Samples 2.30-2.39 1 2.40-2.49 2 2.50-2.59 3 2.60-2.69 6 2.70-2.79 7 2.80-2.89 1 O 0.087 O 0.011 O 0.065 O 0.033 0.024
Following are the results of a filed unit weight determination test on soil with the sand cone method: Calibrated dry density of Ottawa Sand = 1667kg/m³ Calibrated mass of Ottawa sand to fill the cone =0.177kg Mass of jar + cone + sand (before use) = 5.99kg Mass of jar + cone + sand (after use) = 2.81kg Mass of soil from hole = 3.331kg Moisture content of moist soil = 11.6% 38. Determine the dry unit weight of soil in the field. (kN/m³) с. 17.78 а. 18.56 b. 20.45 d. 16.25 39. If the maximum dry unit weight of the soil is, 17.54KN/m³, calculate the relative compaction. a. 92.67% b. 86.52% С. 88.97% d. 95.45%
Following are the results of a filed unit weight determination test on soil with the sand cone method: Calibrated dry density of Ottawa Sand = 1667kg/m³ Calibrated mass of Ottawa sand to fill the cone =0.177kg Mass of jar + cone + sand (before use) = 5.99kg Mass of jar + cone + sand (after use) = 2.81kg Mass of soil from hole = 3.331kg Moisture content of moist soil = 11.6% 38. Determine the dry unit weight of soil in the field. (kN/m³) с. 17.78 а. 18.56 b. 20.45 d. 16.25 39. If the maximum dry unit weight of the soil is, 17.54KN/m³, calculate the relative compaction. 92.67% b. 86.52% c. 88.97% d. 95.45% a.
Laboratory compaction test results on a clayey silt are given in the following table:- Moisture content (%) Dry unit w3eight (kNm³) 14.80 8 17.45 18.52 11 18.9 12 18.6 14 16.9 Following are the results of a field unit weight determination test on the same soil with the sand cone method:- • Calibrated dry density of Ottawa sand = 1667 kg/m³ • Calibrated mass of Ottawa sand to fill the cone = 0.117 kg • Mass of jar + cone + sand (before use) = 5.99 kg • Mass of jar + cone + sand (after use) = 2.81 kg • Mass of moist soil from hole = 3.331 kg • Moisture content of moist soil = 11.6% Determine a. Dry unit weight of compaction in the field
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.
The following data represent the results obtained from the specific gravity (S.G.) test performed in a soil laboratory including twenty sand samples. The value of mode is 2.65. * Specific Gravity Number of Samples 2.30-2.39 1 2.40-2.49 2.50-2.59 2.60-2.69 2.70-2.79 2.80-2.89 1 47