Description
Objectives
Learning Objective 1 – Describe the different types and characteristics of soils.
- Identify the types of soils.
- Describe the properties of soils.
- Explain how soil density is determined.
- Explain how moisture affects soil.
Learning Objective 2 – Describe the factors that affect soil excavation.
- Explain what the swell factor is and how to calculate the swell factor of soils.
- Explain what the shrink factor is and how to calculate the shrink factor of soils.
- Describe how swell and shrink factors affect cycle times and equipment selection.
Learning Objective 3 – Describe working in various soil conditions.
- Describe the weight bearing and flotation properties of different soils.
- Explain how soil characteristics affect machine performance.
- Describe how soil conditions can affect trenching safety.
Performance Tasks
Performance Task 1 (Learning Objective 1) – Identify five basic types of soils and summarize their characteristics.
Performance Task 2 (Learning Objective 1) – Read results from a field density test and explain what additional compaction effort is needed.
Performance Task 3 (Learning Objective 2) – Compute shrinkage and relative compaction for two different types of soil.
