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3 cards from this section. Quick, good the night before a test.
What is the formula for calculating Theoretical Specific Gravity (G_t)?
Remember, this involves the total weight and specific gravities of all components.
What does VFB stand for?
Think about how much of the void space is occupied by bitumen.
What does G_t represent in Marshall Mix Design?
It’s the gravity that relates to the mixture's theoretical density.
True or False: G_m includes the air voids in the mixture.
Think about how G_m differs from G_t.
Given the specific gravities 2.65 for coarse aggregate, 2.50 for fine aggregate, and 1.03 for bitumen; what would be the G_t for a mix with weights 900g, 1300g, 150g?
Make sure to check your weights against specific gravities.
In a mix with 30% air voids and the volume of bitumen calculated as 18%, what is the VMA?
Just a simple addition to find total voids.
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