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3 cards from this section. Quick, good the night before a test.
What does M25 signify in concrete mix?
Think about how much weight M25 can support.
What is W/C ratio?
This ratio affects the strength of concrete.
What is the characteristic strength of M25 concrete?
Think about the values associated with M grades.
True or False: The W/C ratio affects both the strength and workability of concrete.
Recall how water impacts concrete properties.
Calculate the total weight of the materials needed for 5 m³ of M25 concrete using a W/C ratio of 0.45.
Remember to multiply by the total volume of concrete you are designing for.
If the specific gravity of aggregates changes, how would you adjust the mix calculations?
Think about how density affects volume calculations.
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