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3 cards from this section. Quick, good the night before a test.
What is the effect of a high water-cement ratio on concrete?
Think about how water affects solidity.
Name one guideline to determine the water-cement ratio.
Consider the standards governing concrete design.
What is the primary influence of the water-cement ratio on concrete?
Look for the factor that combines how robust the concrete is.
True or False: A lower water-cement ratio generally results in higher strength.
Think about the relationship between water and solidity.
Consider a scenario where the required compressive strength of concrete is 30 MPa. The durability requirement suggests a maximum w/c ratio of 0.45. You start trials at 0.50, adjusting down for workability. Describe your findings.
What trends do you notice as you lower the water content?
You are designing a mix for an area with harsh weather. The requirements state a w/c ratio of 0.40 is needed. However, your initial trials at 0.45 provide a workable mix that barely meets criteria. What steps would you take?
How do additives influence your mix?
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