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Florida Agricultural and Mechanical University Division of Engineering Technology Soil Mechanics & Foundations ETC 3211 Assignment 3-1 1. The following are the results of a sieve analysis. Determine the percent finer than each sieve and plot a grain size distribution curve. The related empty gradation pages are provided. Cumulative Percent of Mass retained on Each Percent Mass retained on Each Sieve(g) U.S. Sieve Opening # Percent Finer (mm) M₂ Sieve(g) R₂ 100 - ΣΚ. Retained ER, (5) (1) (2) (3) (4) (6) 4 4.75 0 10 2.00 18.5 20 0.850 53.2 40 0.425 90.5 60 0.250 81.8 100 0.150 92.2 200 0.075 58.5 Pan 26.5 ΣΜ - 2. Based on the grading curve of the soil: (a) Determine D10, D30, and D60 from the grain-size distribution curve. (b) Calculate the Uniformity Coefficient. (c) Calculate the Coefficient of Gradation. (d) Calculate the percentage of Gravel, Sand and fine-grained soil according to USCS and AASHTO systems
% Passing 1 in. 3 in 2 in No. 4 No. 100 No. 10 No. 200 No. 40 30 20 100,0 50.0 10.0 5.0 Project No. Plotted by 1.0 0.5 Grain diameter (mm) Grain-size distribution curve 01 Sample No. Date 0.05 0.01 0.005 0.001
% Passing 100 90 8 ВО 70 09 50 40 30 20 10 3 in. 2 in. 1 in. 1 in. 0 100.0 50.0 -4---4-- in. No. 10 No. 40 ---No. 100 - No. 200 · No. 4 ▬▬▬▬▬▬▬▬ 10.0 5.0 Project No. Plotted by 1.0 0.5 Grain diameter (mm) Grain-size distribution curve 0.1 Sample No. Date 0.05 0.01 0.005 0.001