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2 cards from this section. Quick, good the night before a test.
What does the California Bearing Ratio (CBR) test measure?
Think about how we assess soil strength.
What is the formula for calculating CBR?
Consider the comparison aspect of the test.
What does CBR stand for?
Focus on what the acronym represents in technical terms.
A higher CBR value indicates stronger soil.
Consider what CBR measures.
If a soil sample supports 3000 lbs and the standard crushed stone supports 20000 lbs, calculate the CBR.
What formula do you use to relate these values?
Discuss the implications of a CBR value of 5% for a highway layer. What construction practices might be required?
What strategies can enhance subgrade strength?
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