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4 cards from this section. Quick, good the night before a test.
What is the plasticity index formula?
Think about how we measure changes between liquid and plastic states.
What is fine-grained soil typically defined by?
Consider the threshold used for classification.
What defines fine-grained soil?
Look back at the definition presented at the beginning of the section.
If the liquidity index is less than 0, what does it indicate?
Recall the classification we discussed earlier.
You have a soil sample with a plastic limit of 22% and a liquid limit of 40%. What is the activity classification if the clay content is 30%?
Calculate the plasticity index first.
A construction site has encountered a soil with 70% clay, a plastic limit of 40%, and a liquid limit of 70%. Classify the soil based on activity and liquidity index.
Start with calculating the plasticity index.
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