2.1.4. AASHTO Classification

Try these first

1. 1.

   What are the seven groups in AASHTO classification?

   Hint

   Think of the numbers in sequence.

2. 2.

   What is the purpose of soil classification?

   Hint

   Consider what engineers need to know before building.

3. 3.

   What does AASHTO stand for?

   • American Association of State Highway and Transportation Officials
   • American Association of Soil Testing Officers
   • American Association of Structural Engineers

   Hint

   Think about what the letters in the acronym represent.

4. 4.

   Group A-7 represents soils that are usually acceptable for construction.

   • True
   • False

   Hint

   Reflect on the characteristics of different groups.

5. 5.

   You have a soil sample categorized as A-6. Analyze the potential challenges this soil might pose for a highway project and suggest possible solutions.

   Hint

   Consider both physical treatments and alternative materials.

6. 6.

   Compare and contrast the behaviors expected from A-2 and A-7 classified soils in terms of load support and moisture retention.

   Hint

   Reflect on how differing plasticity levels can impact structural integrity.