Problem D: For problems 14 to 17. Classify the following soils by the AASHTO classification System. Description A В D 100 | 92 100 85 Percent finerthan No. 4 sieve 100 94 Percent finerthan No. 10 sieve 80 80 Percent finer than No. 40 sieve 96 71 78 51 Percent finerthan No. 200 sieve 72 56 59 15 Liquid Limit 58 35 42 26 Plasticity Index 23 19 13 12

2. 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 84 80 99 Percent passing No. 40 58 60 85 No. 200 8 40 71 L.L. --- 39 55 P.L. N.P. 30 44

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Classify the following soils by the AASHTO classification system. Give the group index for each soil. Sieve analysis- Percent finer Liquid limit Plasticity index Soil No. 10 No. 40 No. 200 A 98 80 72 52 21 90 74 58 38 12 84 71 64 41 14 D 100 78 82 32 12 E 80 68 48 30 11 © Cengage Learning 2014

The sieve analysis of four soils 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. Comment on the suitability of the soils as subgrade material. Sieve analysis (percent finer) Soil No. No. 10 No. 40 No. 200 Liquid limit Plastic limit 100 80 58 30 20 2 95 60 20 3 90 76 34 37 25 4 48 28 NP [Das B. M. Principles of Geotechnical Engineering (7E), pp. 101, 102, 112]

The laboratory test results of six soils are given in the following table. Classify the soils by the AASHTO Soil Classification System and give the group indices. Sieve Analysis-Percent Passing Soil Sieve No. C D A в F 4 100 100 95 95 100 100 10 95 80 80 90 94 94 40 82 61 54 79 76 86 200 65 55 8 64 33 76 Liquid limit 42 38 NP* 35 38 52 Plastic limit 26 25 NP 26 25 28 *NP = nonplastic

Classify the following soils by the Unified (USCS) and AASHTO methods. Where necessary, assume CU = 7 and Cc=2.5. Soil No. 2 62 % Passing Soil No. 1 # 4 95 41 #10 88 # 40 33 11 81 2676 #200 65 21 LL 53 12 PL 36 USCS AASHTO Usily

Classify the following soils by using Unified Soil Classification System. Give the group symbols and the group names.

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