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Unformatted text preview: CE 3400 Fall 2009 2 % Passing #4 sieve=100%, therefore, SAND less than 5% pass #200 D 10 =0.75mm D 30 =1 D 60 =1.2 Cu=1.6<6 Cc=1.11>1 and <3 Group Symbol SP 4. Explain why hydrometer tests are not used in the USCS classification system of fine grained soils. The behavior of fine-grained soils depends on the composition and mineralogy of the soil. Grain size characteristics that are determined from the hydrometer do not reflect these characteristics. Therefore, Atterberg Limits are used to classify fine grained soils. 5. Answer the question in Problem 5.4 of Coduto. A silty sand is a coarse-grained soil which is primarily sand with 12% or more fines that classify as silt A sandy-silt is a fine grained material which is primarily silt with sand being the minor component. (See table on page 145) 6. Answer the question in Problem 5.6 of Coduto. Soil 4-CL. It is the only soil listed where the major component is clay...
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This note was uploaded on 06/21/2010 for the course CE 3400 taught by Professor Brentrosenblad during the Fall '09 term at Missouri (Mizzou).
- Fall '09
- Geotechnical Engineering