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2 cards from this section. Quick, good the night before a test.
What is the minimum compaction percentage for subgrade preparation?
It’s a percentage related to soil compaction.
What material is often used for sub-bases?
Think about stable materials that can handle loads.
What is the required compaction level for subgrade?
It’s a percentage, make sure it’s high enough!
True or False: The sub-base can be made from organic materials.
Think about the stability of the materials.
Given a scenario where pavement has multiple cracks developing after a year, analyze the potential issues with the subgrade preparation and suggest corrective actions.
Look at the factors contributing to soil stability.
If the sub-base depth is reduced from the standard 150 mm to 80 mm, describe the effects this might have on pavement performance in heavy traffic areas.
Think about how the thickness affects weight support.
5 more questions in this section. Enroll free to practise them all.
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