Question

1. Compute the compactive effort or compaction energy for a soil sample compacted in a mold with a volume of 1/30 cubic foot which uses 4 layers to place soil in the mold and compacts each layer using a hammer with a weight of 10 lbs that is dropped 12 inches and uses 20 blows per layer. (2 pts) 2. Using the result from question 1 compare the compaction energy to the Modified Proctor compaction test and the Standard Proctor compaction test? (2 pts) 3. What does the zero-air-voids line represent? (2 pts) 4. Estimate the Maximum dry density for a soil having an optimum water content of 14 percent and a specific gravity of 2.65. (3 pts) 5. Describe the steps used to perform a sand cone density test. (4 pts) 6. Describe two things you can do to increase the dry density of a sample that was 3 percent dry of the optimum water content for a sample compacted at a standard compaction energy if you wanted to increase the dry density of the soil. (2 pts)

Answer 1