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Classify the soil using AASHTO. The liquid limit and plastic limit are found to be 30 and 20, respectively. The following data are obtained: Percent passing No. 4 sieve: 100% Percent passing No. 10 sieve: 91% Percent passing No. 40 sieve: 60% Percent passing No. 200 sieve: 20%

Classify the soil using AASHTO. The liquid limit and plastic limit are found to be 30 and 20, respectively. The following data are obtained: Percent passing No. 4 sieve: 100% Percent passing No. 10 sieve: 91% Percent passing No. 40 sieve: 60% Percent passing No. 200 sieve: 20%

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Classify the soil using AASHTO. The liquid limit and plastic limit are found to be 30 and 20, respectively. The following data are obtained: Percent passing No. 4 sieve: 100% Percent passing No. 10 sieve: 91% Percent passing No. 40 sieve: 60% Percent passing No. 200 sieve: 20%
Table 5.1 Classification of Highway Subgrade Materials General classification Granular materials (35% or less of total sample passing No. 200) A-1 A-2 Group classification A-1-a A-1-b A-3 A-2-4 A-2-5 A-2-6 A-2-7 Sieve analysis (percentage passing) No. 10 No. 40 50 max. 30 max. 50 max. 51 min. No. 200 15 max. 25 max. 10 max. 35 max. 35 max. 35 max. 35 max. Characteristics of fraction passing No. 40 Liquid limit Plasticity index Usual types of significant constituent materials 40 max. 11 min. Silty or clayey gravel and sand 41 min. 10 max. 40 max. 41 min. 6 max. Stone fragments, gravel, and sand NP 10 max. 11 min. Fine sand General subgrade rating Excellent to good 70 Silt-clay materials (more than 35%% of total sample passing No. 200) General classification 60 A-7 A-7-5 A-7-6 50 Group classification A-4 A-5 A-6 Sieve analysis (percentage passing) No. 10 No. 40 No. 200 Characteristics of fraction passing No. 40 Liquid limit Plasticity index Usual types of significant constituent materials General subgrade rating 40 A-7-6 36 min. 36 min. 36 min. 36 min. 30 A-2-6 41 min. 10 max. 41 min. Il min. 40 max 40 max. A-6 20 10 max. |l min. A-2-7 A-7-5 Silty soils Clayey soils Fair to poor 10 "For A-7-5. PI s LL-30 "For A-7-6, PI> LL- 30 A-2-4 A-2-5 A-4 A-5 10 20 30 40 50 60 70 NO 90 00 Liquid limit Plasticity index
Transcribed Image Text:Table 5.1 Classification of Highway Subgrade Materials General classification Granular materials (35% or less of total sample passing No. 200) A-1 A-2 Group classification A-1-a A-1-b A-3 A-2-4 A-2-5 A-2-6 A-2-7 Sieve analysis (percentage passing) No. 10 No. 40 50 max. 30 max. 50 max. 51 min. No. 200 15 max. 25 max. 10 max. 35 max. 35 max. 35 max. 35 max. Characteristics of fraction passing No. 40 Liquid limit Plasticity index Usual types of significant constituent materials 40 max. 11 min. Silty or clayey gravel and sand 41 min. 10 max. 40 max. 41 min. 6 max. Stone fragments, gravel, and sand NP 10 max. 11 min. Fine sand General subgrade rating Excellent to good 70 Silt-clay materials (more than 35%% of total sample passing No. 200) General classification 60 A-7 A-7-5 A-7-6 50 Group classification A-4 A-5 A-6 Sieve analysis (percentage passing) No. 10 No. 40 No. 200 Characteristics of fraction passing No. 40 Liquid limit Plasticity index Usual types of significant constituent materials General subgrade rating 40 A-7-6 36 min. 36 min. 36 min. 36 min. 30 A-2-6 41 min. 10 max. 41 min. Il min. 40 max 40 max. A-6 20 10 max. |l min. A-2-7 A-7-5 Silty soils Clayey soils Fair to poor 10 "For A-7-5. PI s LL-30 "For A-7-6, PI> LL- 30 A-2-4 A-2-5 A-4 A-5 10 20 30 40 50 60 70 NO 90 00 Liquid limit Plasticity index
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