Soils – Module ID 22308-13

Soils – Module ID 22308-13


Module Six (22308-12) introduces trainees to the various types of soils, their properties, and how these properties affects the heavy equipment operator.

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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.

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