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4 cards from this section. Quick, good the night before a test.
What is the typical compressive strength range for highway pavements?
Think about the strength required for road traffic.
What purpose does workability serve in a concrete mix?
Consider how ease of use impacts construction.
What is the typical compressive strength range required for highway concrete pavements?
Refer to the performance criteria discussed.
True or False: Flexural strength is usually assessed via direct compression tests.
Think about the modes of applying forces in testing.
A new concrete mix design aims for a target flexural strength of 5 MPa for a specific highway's conditions. If the characteristic strength is measured at 4.2 MPa with a standard deviation of 0.8, find the required target strength using the IRC:44 method.
Use the statistical constant to adjust the characteristic strength.
Calculate the amount of cement needed if a mix design requires 240 kg of water and aims for a water-cement ratio of 0.5.
Ensure you apply the water-cement ratio correctly in your calculations.
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