5. The results of field unit weight determination of a soil sample using the sand cone method is as follows: Volume of soil: 0.00134 m³ Mass of soil: 2250 grams Dry mass of soil: 1734 grams In a laboratory, this soil yields a dry density of 1.425 g/cc at optimum moisture content of 13.8% a. What is the field unit weight of soil? b. What is the in-situ water content of soil? c. Determine the relative compaction of the soil.

5. The results of field unit weight determination of a soil sample using the sand cone method is as follows: Volume of soil: 0.00134 m³ Mass of soil: 2250 grams Dry mass of soil: 1734 grams In a laboratory, this soil yields a dry density of 1.425 g/cc at optimum moisture content of 13.8% a. What is the field unit weight of soil? b. What is the in-situ water content of soil? c. Determine the relative compaction of the soil.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Initial data for determining the specific gravity of a soil sample is given below: Calibration of Pycnometer (1) Mass of dry clean pycnometer, Mp= 317.11 g (2) Mass of pycnometer + water at calibration temperature, Mpw,c = 903.03 g (3) Observed temperature of water at calibration, T = 26.4°C Secondary data for the determination of Specific Gravity is as follows: Determination No: Mass of pycnometer + soil + water at test temperature, Mpws,t (9) Test Temperature, T₁ (°C) Mass of pycnometer + water at T₁, Mpw,t (9) Evaporating dish no. Mass of evaporating dish, M. (g) Mass of evaporating dish + oven-dried soil, Mas (9) Mass of solids, M, (g) Conversion factor, K Specific gravity of soil, Gs@20°C Determine the conversion factor, K (5 decimal places) 1 966.17 22.3 1 15.52 115.51
A series of modified Proctor tests have been performed on a soil that has a Gs of 2.68. The test results obtained are as follows. Point No. Weight of Compacted Soil + Mass of Mass of Can + Moisture Content Test Results Mass of Can + Dry Mold (lb) Can (g) Moist Soil (g) 1 8.73 22.13 207.51 2 9.07 25.26 239.69 3 9.40 19.74 253.90 4 9.46 23.36 250.93 5 9.22 20.28 301.47 Soil (g) 202.30 225.27 230.64 219.74 250.95 The weight of the empty mold was 5.06 lb. Plot the laboratory test results and the S = 80% and S = 100% curves, and then draw the modified Proctor compaction curve. Determine the maximum dry unit weight (lb/ft³) and the optimum moisture content, based on the modified Proctor test. Assuming that the field compaction curve is the same as the compaction curve obtained using the modified Proctor test, determine the range of as-compacted moisture content required in the field to obtain a relative compaction of at least (a) 90%, and (b) 95%.
02. In the soil mechanics laboratory of UCONTI, the following masses were obtained: Wet sample weight + container weight = 148.9 gr. Dry sample weight + container weight = 112.8 gr. Sample container weight = 38.6 gr. Calculate the moisture content of the sample
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You’ve conducted a soil extraction on the site to have its soil profile determine, you’ve gathered the data has follows: Mass of the soil sample = 11 kilograms; Volume of the soil sample = 0.005 cubic meter; Water content = 18%; Specific Gravity = 2.65. Determine the following: Void Ratio, Porosity, Saturation, Density of the Soil, Dry Density of the Soil, Unit weight of the soil, Dry Unit Weight of the soil, Saturated Unit Weight of the soil.ASAP
A series of modified Proctor tests have been performed on a soil that has a G, of 2.68. The test results obtained are as follows. Point Weight of Compacted Soil + Moisture Content Test Results Mass of Mass of Can + Mass of Can + Dry No. Mold (lb) Can (g) Moist Soil (g) Soil (g) 12345 8.73 22.13 207.51 202.30 9.07 25.26 239.69 225.27 9.40 19.74 253.90 230.64 9.46 23.36 250.93 219.74 9.22 20.28 301.47 250.95 The weight of the empty mold was 5.06 lb. Plot the laboratory test results and the S = 80% and S = 100% curves, and then draw the modified Proctor compaction curve. Determine the maximum dry unit weight (lb/ft³) and the optimum moisture content, based on the modified Proctor test. Assuming that the field compaction curve is the same as the compaction curve obtained using the modified Proctor test, determine the range of as-compacted moisture content required in the field to obtain a relative compaction of at least (a) 90%, and (b) 95%.
You've conducted a soil extraction on the site to have its soil profile determine, you've gathered the data has follows: Mass of the soil sample = 15 kilograms; Volume of the soil sample=0.007 cubic meter; Water content = 15%; Specific Gravity = 2.7. Determine the following: Void Ratio, Porosity, Saturation, Density of the Soil, Dry Density of the Soil, Unit weight of the soil, Dry Unit Weight of the soil, Saturated Unit Weight of the soil.
1. From the given soil samples below, (a) compute the effective size, uniformity coefficient, and coefficient of gradation (b) Determine the percent of gravel, sand, silt and clay of soil A using AASHTO Sieve size. 0.425 0.033 0.018 0.01 0.0062 0.0035 0.0018 0.001 Soil A Passing Finer (%) 100 90 80 70 60 50 40 35
For a given soil, the results of compaction test conducted in the laboratory are given in Table 1. Table 1. Moisture content % Dry Unit Weight Ya(kN/m) 12 16.34 14 16.93 16 17.5 18 17.8 16.9 20 22 16.4 After compaction of the soil in the field, sand cone tests (control tests) were conducted at five locations, the results of sand cone tests are given in Table 2. separate Table 2. Moisture content (%) Location Moist density (kg/m') 1 15.0 2050 16.2 2070 17.3 1971 4 18.9 1988 21.3 2101 The specifications require that: a) Yd must be at least 0.95 ya(max). b) Moisture content w should be within +1.5% of wopt. 1) Draw (on graph paper) the compaction curve and ZAV curve. (Gs = 2.72). 2) Show for each location either it is accepted or not according to the specifications required and give reason why?
The following data were obtained from laboratory tests for a cohesive soil: moisture content = 22.5%, specific gravity = 2.60. To determine the approximate unit weight, a sample having a mass of 224 g was placed in a 500 cm container with 382 cm of water required to fill the container. What is the total unit weight of the soil sample in kN/m ? Select one: а. 15.56 b. 20.14 c. 18.62 d. 25.34
Problem 4: A balloon-type apparatus is used to determine an in-place unit weight for a soil (field density test). The volume of the test hole is 0.000708 cu.m. The weight of the soil obtained from the test hole is 1410 g. The soil sample was dried on a field stone and weighs 1235 g. 1. Compute the water content of the tested soil. 2. Compute the in-place dry unit weight of the tested soil. 3. Determine the $ of compaction for the test result if the soil is part of a compacted carth fill whose maximum unit weight (from laboratory compaction tests) is 18.67 KN/m³.
Question 11