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2 cards from this section. Quick, good the night before a test.
What is the main advantage of rigid pavements compared to flexible pavements?
Think about their material composition and response to loads.
Define the modulus of sub-grade reaction.
Consider the behavior of the surface supporting the slab.
What is the primary material used for rigid pavements?
Think about materials that provide strength and durability.
True or False: The modulus of sub-grade reaction is calculated from slab displacement and pressure.
Remember the relationship between pressure and how much the slab sinks.
A cement concrete pavement of thickness 30 cm needs to be designed to withstand a wheel load of 6000 kg. Calculate the required modulus of sub-grade reaction if the slab shows a deflection of 0.15 cm.
Focus on the ratio of force to the resultant deflection.
Design a dowel bar system for a joint with 50 cm spacing, assuming a wheel load of 4000 kg. What is the load transfer capacity needed?
Remember the capacity factor principle we discussed.
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