1. Unified Soil Classification System Training Part B - USCS using Laboratory Data

2. Comparison of Particle Size Definitions # 200 USDA cobbles sand clay gravel 3” 2  .05 mm # 4 silt USCS cobbles sand fines gravel .074 mm # 4 3”

4. Comparison of Particle Size Definitions

5. Activity 2 - Particle Size Comparisons

6. USCS Flow Chart - Activity 3

8. USCS Overview

10. USCS Overview

11. Activity 4 - Organic Soil Solve 4 samples

13. Activity 5 - Plasticity Chart

14. Activity 5 - Plasticity Chart Solve 4 samples

15. Activity 7 - Classify Fine-Grained Samples Assume 6 samples are not organic and classify by USCS

17. Coarse-grained Soils

19. Sieve Analyses % fines = % finer than # 200 sieve % sand = % finer # 4 minus % finer # 200 % gravel = % finer 3”minus % finer # 4

21. Activity 8 For 7 samples, fill out Activity

23. Determining D 10 , D 30 , and D 60 D 10 , millimeters 10 % finer D 30 , millimeters 30 D 60 , millimeters 60

24. Computing CU and CC Coefficient of Uniformity Coefficient of Curvature High Values Indicate Well-Graded Soil Values Between 1-3 Indicate Well-Graded Soil

25. Activity 9 Plot Curve from Data, compute CU Value

26. Activity 10 Plot Curve from Data, compute CC Value

28. Poorly Graded Sands and Gravels Poorly graded % Finer Particle Size Either Mostly One-Size Particle Gap graded Particle Size % Finer Or Gap- Graded

31. Activity 12 Review Example Soil

32. Activity 13 Use Flow Chart, Classify Soil

37. Activity 16 - Problems

38. Activity 17 - Example of Classifying Dual-Classification Coarse-Grained Soil

39. Activity 18 - Problem

40. Activity 20 - Review Questions

41. Activity 21 - Comprehensive Problems