In a standard proctor test, 1.8 kg of moist soil was filling the mould (volume = 0.944 cc) after compaction. A soil sample weighing 23 g was taken from the mould and oven dried for 24 hours at a temperature of 110 °C. Weight of the dry sample was found to be 20 g. Specific gravity of soil solids is G = 2.7. The theoretical maximum value of the dry unit weight of the soil at that water content is equal to

In a standard proctor test, 1.8 kg of moist soil was filling the mould (volume = 0.944 cc) after compaction. A soil sample weighing 23 g was taken from the mould and oven dried for 24 hours at a temperature of 110 °C. Weight of the dry sample was found to be 20 g. Specific gravity of soil solids is G = 2.7. The theoretical maximum value of the dry unit weight of the soil at that water content is equal to

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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A compaction test was conducted in the laboratory and the following information was obtained: • The weight of the compacted soil specimen (including the mold) was determined to be 3815 • The volume of the mold = 1/30 ft³ (944 cm³) • The weight of the mold = 2050 g • The water content in the soil was determined to be 9.1% Find the dry unit weight of the soil (in units of kN/m³).
The results of a standard Proctor test are given in the following table. Determine the maximum dry unit weight of compaction and the optimum moisture content. Also determine the moisture content required to achieve 90% of ꙋd (max).
The following results were obtained from a liquid limit test on a soil using a liquid limit device. The in-situ water content of this clay is 38% and the plastic limit is 20%. (Note: show the semi-log graph for the determination of the LL) Determine the following: (a) Liquid Limit of the soil, (b) Plasticity Index of the soil, and (c) Liquidity Index of the soil (d) shrinkage limit using the plasticity chart
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.
A sample of clay soil of volume 1x10^-3 m^3 and mass 1.762 kg, after being dried out in an oven had a mass of 1.368 kg. The specific gravity of the particles was 2.69. a. Compute the void ratio. b. Find the volume of air in the original sample. c. Determine the density of sample of soil when completely saturated, assuming that it has the same void ratio.
Following are the results from the liquid and plastic limit tests for a soil. Liquid limit test: let the N1 be 15 and w1 be 28% let N2 be 21 and w2 be 23% let N3 be 33 and w3 be 14% For Plastic limit test: let w1 be 13 and let w2 be 15 and let w3 be 14 The liquid limit = Plastic limit = Plasticity Index =
Question 1 (a) Based on your understanding, briefly elaborate the different between residual soil and transported soil. (b) An undisturbed cylindrical soil sample is 0.060 m in diameter and 0.155 m long. It has a total mass of 0.82 kg. The specific gravity of the soil is 2.7. After finding the mass of the entire sample, a small portion was removed and a moisture content test was performed on the sample. The results of this moisture content test on the subsample were mass of moist soil = 102.96 g and mass of dry soil = 90.71 g. Determine the following: Moisture content i. Wet unit weight Void ratio ii. ii. (c) A series of laboratory compaction test performed using the Standard Proctor Test procedure, the moisture content tests were further performed by taking out small portions of compacted soil and the result obtained are as shown in Table Q1 (c): Table Q1 (c) Volume of Proctor Mass of compacted Mass wet soil sample (g) Mass dry soil sample mold (m) soil (g) (g) 0.00095 1704 183.64…
An in-situ density test on a 542.5 cm³ soil sample was conducted. The total weight of the sample at the site was 801.3 gr. Soil samples of the test were collected and moisture content was determined to be 4.5%. Assuming G, = 2.71 determine: (a) The in-situ unit weight of the soil in kN/m³. (b) The void ratio of the soil. (c) The porosity of the soil. (d) The degree of saturation.
In order to calculate void ratio of a soil sample, which laboratory test(s) need(s) to be conducted? a. Liquid limit test b. Drying in oven c. Pumping well test d. Pycnometer test e. Ground Penetrating Radar tests f. Hydrometer analysis
In a standard proctor test, 3.2 kg of moist soil was filling the mould of volume 944 cc after compaction. A soil sample weighing 40 gm was taken from the mould and oven dried for 24 hours at a temperature of 110°C. Weight of dry sample was found to be 34 gm. Specific gravity of soil solids is 2.5. The theoretical maximum value of the dry unit weight of soil at that water content is equal to