Q12. Grain size distributions and Atterberg Limits are given for soils (1 & 2) in Figure Q12. Classify the two soils according to the USCS system. Percent finer by weight (or mass) 100 90 80 70 60 40 30 20 10 O 100 10 Grain size (mm) Juuk Soil 2 LL-28, Pl-4 0.1 Grain size (mm) 1.0 Figure Q12 Soil 1 LL-48, PL-26 Inueட 0.01 0.001 I

Q12. Grain size distributions and Atterberg Limits are given for soils (1 & 2) in Figure Q12. Classify the two soils according to the USCS system. Percent finer by weight (or mass) 100 90 80 70 60 40 30 20 10 O 100 10 Grain size (mm) Juuk Soil 2 LL-28, Pl-4 0.1 Grain size (mm) 1.0 Figure Q12 Soil 1 LL-48, PL-26 Inueட 0.01 0.001 I

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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From a particle size distribution curve of a sandy soil the following were obtain: Size of particle 0.48 mm percentage finer 60;Size of particle 0.33 mm percentage finer 30;Size of particle 0.21 mm percentage finer 10;Size of particle 0.11 mm percentage finer 5;Determine Cc.
4.16 Plot the particle size distribution curve for each of the three soils the data for which are given below. All three curves should be on the same semi logarithmic diagram. Sieve Number 3/4 in ½ in #4 # 10 # 20 # 40 # 60 # 100 # 200 Particle Diameter from Hydrometer Analysis (mm) Lagoon Clay Beufort, SC 0.045 0.010 0.005 0.001 Data from Sowers (1979). 100 100 100 100 100 100 100 95 80 61 42 37 27 % Passing by Weight Beach Sand Daytona Beach, FL 100 100 100 100 100 98 90 10 2 Weathered Tuff Central America 100 98 95 93 88 82 75 72 68 66 33 21 10 4.17 Determine Cu and Ce for each of the three soils in Problem 4.17. Which of these soils is most well-graded? Why?
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
1. The following results were obtained in a sieve analysis for three different soils. Classify the soils according to the AASHTO classification system. Soil 1 2 3 No. 10 79 80 95 Percent passing No. 401 62 60 78 No. 200 6 33 45 L.L. 38 36 P.L. N.P. 29 16
Question 2 The sieve analysis of soil and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. % Passing No. 10: 87 % Passing No. 40: 62 % Passing No. 200: 30 LL = 32 PL = 24 Group classification: Blank 1 Group index: Blank 2
Classify the following soil by the Unified Soil Classification System. Percent passing No. 4 sieve = 82Percent passing No. 10 sieve = 71Percent passing No. 40 sieve = 64Percent passing No. 200 sieve = 41Liquid limit = 31Plasticity index = 12
P2, 5.4 List the given, required, graph and box the final answer.
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1. Classify the following soils using USCS and give the group symbols. Sieve Analysis, % finer Soil Liquid Limit No. 4 No. 200 1 (SC) 70 30 33 2 (GC) 48 20 41 3 (CH) 95 70 52 4 (CL) 100 82 30 5 (CL) 100 74 35 6 (SC) 87 26 38 7 (CH) 88 78 69 8 (CH) 99 57 54 9 (SP-SC) 71 11 32 10 (SW) 100 2 11 (CL) 89 65 44 12 (SP-SC) 90 8 39 Plasticity Index 21 22 28 19 21 18 38 26 16 NP 21 31 Cu 4.8 7.2 3.9 Cc 2.9 2.2 2.1
• Particle size analyses were carried out on two soils-Soil A and Soil B-and the particle size distribution curves are shown in Figure % Finer Clay 100 90 80 70 60 50 40 30 20 10 0 0.001 + Silt Soil A Sand Soil B 0.01 0.1 1 Particle size (mm) - log scale Gravel 10 Soil A B 1. Classify these soils according to USCS and ASTM-CS 2. Is either of the soils organic? LL 26 (oven-dried; assume same for not dried) Nonplastic PL 18
Problem 4 Classify the following soils by AASHTO classification system. Give group index for each soil. Sieve Analysis- Percent Finer # 40 Soil LL PL # 10 # 200 98 80 72 52 31 90 74 58 38 26