2 Classify these soils according to AASHTO. Include the Group Index. Sieve analysis- Percent finer Liquid limit Plasticity index Soil No. 10 No. 40 No. 200 A 98 80 72 52 21 В 90 74 58 38 12 C 84 71 64 41 14 D 100 78 82 32 12 3 Classify these soils according to USCS. Include Group Symbol and Group Name. Sieve analysis- Percent finer Liquid limit Plasticity index Soil No. 4 No. 200 1 70 30 33 21 48 20 41 22 3 95 70 52 28 4 100 82 30 19

2 Classify these soils according to AASHTO. Include the Group Index. Sieve analysis- Percent finer Liquid limit Plasticity index Soil No. 10 No. 40 No. 200 A 98 80 72 52 21 В 90 74 58 38 12 C 84 71 64 41 14 D 100 78 82 32 12 3 Classify these soils according to USCS. Include Group Symbol and Group Name. Sieve analysis- Percent finer Liquid limit Plasticity index Soil No. 4 No. 200 1 70 30 33 21 48 20 41 22 3 95 70 52 28 4 100 82 30 19

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter4: Soil Classification

Section: Chapter Questions

Problem 4.7CTP: For the soils that are classified by the following AASHTO symbols, what would be the most likely...

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1. Classify the following soils using USCS givegroup symbol and group name.a) A 55% of soil sample retained in sieve no. 4and 89% retained on sieve no. 200. The soilsample has a liquid limit = 28% and plasticLimit = 18% Cu = 4.2, Cc = 1.4 2. A saturated soil has the followingcharacteristics:Initial Volume = 25 cm3Final Volume = 16 cm3Mass of wet soil = 45 gMass of dry soil = 31 ga) Determine the Shrinkage Limitb) Determine the Shrinkage Ratioc) Determine the Specific Gravity of the soil
Classify the following soils in Table Q2 (b) by the AASHTO classification systemand give the group indices.Table Q2 (b)
geotechnical 2.1. Classify the following Soils using the SUCS Unified System: a) Retained in mesh No.4 = 10%Passes No.4 and is retained at mesh No.200 = 60%Cu = 4; dc = 2Fine Fraction: LL = 40%; LP = 25% b) Retained in mesh No.200 = 20%Pass mesh No.4 = 92% of the total sampleCu = 4; DC = 1.5Fine Fraction: LL = 250%; LP = 150%There is no appreciable content of organic matter.
The soil at a borrow area is at moisture content of 8.5%and unit weight of 17.5 kN/m3. This soil is used in the construction of a compacted road base where the dry unitweight is 19.5 kN/m3 and the moisture content is 14.0%. Ifthe finished volume of the road base is 120,000 m3, whatwould be the volume of the soil removed from the borrowpit? How much water would be added to the soil from theborrow pit?
Grain size distributions curves are given for 9 soils in Figures 1, 2 and 3. The LiquidLimit and Plastic Limit for the fine-grained portion of these soils are given in Table 1.a) Classify the soils according to ASTM/USCS (i.e., give both the Group Symboland Group Name).b) It is proposed that Soil 3 (Figure 2) be used for a highway subgrade. What is theAASHTO soil classification for this soil (see classification table on the last page ofthis assignment)? What is this soil's general rating as a subgrade?
The following soil as specified by the AASHTO System has the following results:Percent finer than No. 10 sieve . . . . . . . . . . . . . 90Percent finer than No. 40 sieve . . . . . . . . . . . . . . 76Percent finer than No. 200 sieve . . . . . . . . . . .. . 34Liquid limit = 37Plasticity index = 12Calculate the partial group index for the soil that belongs to groups A-2-6.
Q2/ For proposed Earth Dam fill, the soil will be compact to (95%) of standard proctor dry density. The test of borrow area indicate that (ydmax = 18 kN/m3) at optimum moisture content (11%). The soil of borrow area at natural condition has (e = 0.65) and (Gs = 2.68). Determine the minimum volume ofborrowrequired to make (600,000 m3 ) of acceptable compacted fill.
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
1. The compaction requirement fpr clay soils in traditional applications is 90 to 95 % of maximum drydensity at compaction water contents on both sides of optimum, whereas landfil1 clay linerspecifications normally require 90 to 95% of maximum dry density at compaction water contents onlyon the wet side of optimum water content. Why?
Laboratory tests performed on a saturated alluvial subgrade soil gave the following information: In situ water content = 11.9%, Specific gravity = 2.65, Soil size distribution: D100 = 51 mm, D75 = 30 mm, D60 = 20 mm, D45 = 15 mm, D30 = 8 mm, D10 = 4.76 mm, D8 = 2 mm, D4 = 0.08 mm, < 2 m = 4% a. Is this soil well graded? Classify it by the AASHTO and Unified systems b. Using the sieve analysis soil data and the classification systems, estimate for a total of 100% the approximate percentages of coarse aggregate (gravel), fine aggregate (sand), silts, and clays?
State whether the following are true or false. a. In the AASHTO classification Table 4.1, the soils that are more suitable for roadwork are located on the left than right. b. In AASHTO classification system, the better performing fine grained soils are the ones with lower group indices. c. In AASHTO classification system, sands are classified as grains with 0.075-4.75 mm diameter. d. The USCS symbol for clayey gravel is CG. e. A soil with USCS symbol SM is sandy silt.
For the soils that are classified by the following AASHTO symbols, what would be the most likely USCS symbols? (Reference: Liu, 1970) Gravels sands: A-l-a, A-l-b, A3, A-2-4, A-2-5, A-2-6, A-2-7 Fines: A-4, A-5, A-6, A-7-5, A-7-6