2.1. Soil Classification Systems

Try these first

1. 1.

   What is the purpose of soil classification in engineering?

   Hint

   Think about what would happen if you used the wrong type of soil.

2. 2.

   Name the three main groups in the Unified Soil Classification System.

   Hint

   What are the major classifications we discussed?

3. 3.

   What major classification does the USCS use?

   • Organic
   • Coarse-grained
   • Fine-grained
   • Fine-grained
   • Sandy
   • Clayey
   • Gravel
   • Silt
   • Loam

   Hint

   Look at the main categories we previously covered.

4. 4.

   True or False: The ISCS is similar to USCS but adapted for Indian soils.

   • True
   • False

   Hint

   Consider how different regions might require different classifications.

5. 5.

   You are tasked with assessing a new construction site. The soil has been misclassified. Discuss the steps you would take to reassess the soil type using classification systems.

   Hint

   Remember to consider local soil conditions as well.

6. 6.

   Evaluate the soil's suitability for a highway design project if the AASHTO classification indicates a Group A-6 soil. Discuss the implications and potential treatments required.

   Hint

   Consider methods for treating soils with low performance indices.