CAEE 210 Lecture 3: 2 - Geotechnical Engineering
4 Apr 2016
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Later, assign engineering properties to the soil (based on soil behavior) Grain size distribution a. b. c. d. e. a. b. a. b. c. Standard penetrometer test (spt) - use split spoon sampler b. c. d. Measures torque and resistance i. ii. i. ii. i. ii. Minerals make up come from parent rock and/or other minerals a. b. Particle size: orthoclase (potassium feldspar), muscovite (white mica), quartz. Soil is a mixture of different particle sizes and mineralogy. 10. i. ii. i. ii. i. ii. iii. i. ii. iii. iv. v. A1 - a7: a1 -> a3 : dominant for highway work, a4 -> a7 : worst, due to high clay content. Governed by astm testing methods: astm d2487 - grain size distribution, plasticity test, astm d2488 - visual-manual procedure (fast procedure) Shape: flat (width/thickness > 3mm), elongated (length/width > 3mm), flat and elongated (both criterias) Hardness: coarse sand and larger particles, strike with hammer or large object.
