1.7 The grain-size distribution curve for a soil is given in Figure P1.1. Determine the percent of gravel, sand, silt, and clay present in this sample according to the M.I.T. soil-separate size limits Table 1.1 in the textbook. Percent finer 100 80 60 40 20 0 10 5 2 E 0.3 0.2 0.1 0.05 Grain size (mm) 0.02 0.01 0.005 0.002

1.7 The grain-size distribution curve for a soil is given in Figure P1.1. Determine the percent of gravel, sand, silt, and clay present in this sample according to the M.I.T. soil-separate size limits Table 1.1 in the textbook. Percent finer 100 80 60 40 20 0 10 5 2 E 0.3 0.2 0.1 0.05 Grain size (mm) 0.02 0.01 0.005 0.002

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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1. The results of a standard Proctor test are given in Table Q1 below. Determine the maximum dry density of soil compaction and the optimum moisture content. Table Q1 Volume of Proctor Mass of wet soil in the mold Moisture content mold (cm³) (kg) 3.39 (%) 11.5 987 987 3.87 13.5 987 4.22 15.5 987 5.11 17.5 987 4.75 19.5 987 4.31 21.5
The Grain size analyses results are given in Figure 1 for Soils A and B. Answer the following questions: i) The uniformity coefficient, Cu (= D60/D10) for Soil A is ii) Soil B is classified as.. ..... grained soil. iii) If liquid limit (LL) and plastic limit (PL) values of Soil A are given as 65 % and 35%, then the soil is classified as ................. by using plasticity chart provided below. PLASTICITY INDEX (PI) Percentage Smaller 50 40 30 100 90 20 80 70 60 50 40 30 20 10 0 0,001 For clessification of fine-grained soils and fine-grained fraction of course-grained Equation of A-line Horizontal et PI-4 to LL-25.5 Then PI-0.73 (LL-201 Equation of "u-line Vertical et LL-16 to PI-7 then PI-0.9 (LL-8) Z MHO OH ML OL soills 10 Soil A X 20 0,01 0,1 Particle Size (mm) Figure 1.Grain Size Distribution CLOL LOWING 1 CH OH Soil B LIQUID LIMIT (LL) FG4 Plasticity Chart Figure 2. Plasticity Chart 10 Tio
PROBLEM 1 The following are given for a specimen of soil: M = 300 g, Msolid = 170 g, Gs = 2.72 and S = 70%. Determine: a. Total Volume of the soil sample. b. Porosity of the specimen. C. Volume of water to be added to make the soil fully saturated.
8. The grain size analysis for a soil is given as: asso a. Plot a grain-size distribution curve. b. Determine D10, D30, and D60 from the grain-size distribution curve. c. Calculate the uniformity coefficient, Co. d. Calculate the coefficient of curvature, Co Sieve No. 4 10 20 40 60 100 200 Pan Mass of soil retained (g) 28 42 48 128 221 86 40 24 Cu= Duo / Dio (c = (P30)² 2²/D₁x Duo
2. The following data were recorded during particle size analysis tests in the laboratory. Plot the grading curve and determine the grading characteristics. Using the information, classify the soil according to BSCS. Soil 1 Fine-Mesh dry sieve analysis data: Sieve Size 425 (mm or um) Mass 1.18 600 300 212 150 63 retained 1.9 3.2 8.1 10.4 22.7 126.1 (g) Total sample = 212.0 g
8. The results of a standard compaction test on a soil sample from Glasgow are shown in the graph below. From the graph, determine the optimum moisture content (OMC), maximum dry density and air content at maximum dry density. Can this soil be compacted to 2.11 Mg/m³ at OMC? Why? 22 0% 2.1 5% 2 10% 1.9 1.8 1.7 1.6 1.5 1.4 1.3 - 1.2 8 9 10 11 12 13 14 15 16 17 18 19 moisture content [%] 20 dry denslty [Mg/m³]
Question 3: For an inorganic soil the following grain - size analysis is given. U.S sieve Percent analysis 4 passing 100 10 90 20 64 40 38 80 18 200 13 For this soil, LL=23 and Pl=19, classify the soil by using a. AASHTO b. USCS c. Give group name and group symbols
A soil sample has the following size distribution; 4 to 2mm = 17%, 2 to 0.05 mm = 12%, 0.5 to 0.005 mm = 22% 0.005 to 0.002 mm = 10% <0.002 mm = 39% what is the percent clay silt and sand? What are the modifier and textural classification?
5. The following information is obtained from a sieve analysis to determine the range of particle sizes in a granular soil sample. Sieve Size Sieve Opening (4.76) Percent Finer#4 4.76 96#10 2.00 80#20 0.84 51#40 0.42 38#60 0.25 25#100 0.149 12#200 0.074 5 Present the information as grain-size curve on semi-logarithmic coordinates of percent finer against particle size diameter. From the plot, determine the uniformity coefficient Cu.
2.8 2.7 The following are the results of a sieve and hydrometer analysis. Sieve number/ grain size Analysis Sieve Hydrometer Analysis Sieve 40 80 170 200 0.04 mm 0.02 mm 0.01 mm 0.005 mm 0.0015 mm Hydrometer Sieve number/ grain size Percent finer than a. Draw the grain-size distribution curve. b. Determine the percentages of gravel, sand, silt, and clay according to the MIT system. c. Repeat Part b according to the USDA system. d. Repeat Part b according to the AASHTO system. Repeat Problem 2.7 with the following data: 20 30 40 60 80 200 0.05 mm 0.03 mm 0.015 mm 0.006 mm 0.004 mm 0.0015 mm 100 96 85 80 59 39 26 15 8 Cengage Learning 2014 Percent finer than 100 96 90 76 65 34 27 19 11 7 6 5 Ⓒ Cengage Learning 2014