Determine D10, D30, D60 of the following soils using interpolation. Please show solutions.

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Classify the following soils using the AASHTO classification system. Give group indexes as well.

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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

10 11 percent. Classify the using the textural classification chart: a) Compute the percentage of clay. b). Compute the percentage of silt. c) Classify the type of soil. Problem: soil to be used as highway Classify the given subgrade material using the AASHTO method by using the attached table for its classification. Sieve analysis % finer No. 10 sieve = 47% %3D No.40 sieve = 28% No.200 sieve = 9% Plasticity for the minus No. 40 fraction Liquid limit 0 Plasticity index = 2%

1. Classify the following soil to be used as a highway subgrade material using AASHTO method. Sieve Analysis % Finer No. 10 sieve = 88% No. 40 sieve = 75% No. 200 sieve = 34 % Plasticity for fraction passing No.4 Liquid Limit = 39% Plasticity Index = 12% %3D

Determine D10, D30, D60 of the following soils using interpolation. Please show solutions.

• 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

A soil sample has 98% passing the No. 4 sieve and 74% passing the No. 200 sleve. The LL for the soils 58% and the PI is 30%. Classify the soil according to the USCS.   Show step by step solutions.