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3 cards from this section. Quick, good the night before a test.
What does the water-cement ratio indicate in concrete mix design?
Consider how this ratio impacts concrete quality.
Why is a lower w/c ratio generally better for concrete strength?
Think about the relationship between water content and particle packing.
What is the typical range for water-cement ratios in concrete mix design?
Consider the general guidelines for most concrete mixes.
True or False: A lower water-cement ratio leads to lower strength.
Think critically about how water impacts concrete density.
Design a concrete mix with a target strength of 25 MPa using a w/c ratio of 0.5. Calculate the necessary amounts of water and cement for 1m³, taking the specific gravity of cement as 3.15.
Start with the desired strength to find the cement content.
A construction site requires a concrete mix for a marine environment under severe conditions. What measures would you take regarding the water-cement ratio to ensure durability? What specific w/c ratio would you choose?
Refer back to IS guidelines for water-cement ratios for severe exposure.
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