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2 cards from this section. Quick, good the night before a test.
Define what an admixture is.
Think about the purpose of adding something to a mixture.
Name a type of admixture used to improve workability.
Consider substances that help concrete flow better.
What is the primary purpose of adding an admixture to concrete?
Focus on the benefits of using these materials in the mix.
True or false: Trial mixes are unnecessary when using admixtures.
Consider the need for testing before large-scale implementation.
Calculate the total amount of water needed for a concrete mix that includes a superplasticizer if the original water requirement is 250 kg, and the superplasticizer allows a reduction of 15%.
What does '15% of 250 kg' mean?
You are conducting a trial mix and added a plasticizer which increased the slump from 40 mm to 90 mm. Discuss what considerations you should make for your actual production batch.
How does increased workability affect the overall mix?
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