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3 cards from this section. Quick, good the night before a test.
What is the purpose of using water-reducing agents?
Think about how it affects the strength of concrete.
Name one type of admixture that helps with freeze-thaw resistance.
It adds air bubbles to the concrete.
What is the function of air-entraining agents?
Think about how they protect concrete from weather damage.
Superplasticizers are used to reduce the water-cement ratio without losing workability. True or False?
Consider the relationship between water content and concrete strength.
Create a concrete mix design that requires a high flexural strength for a road surface in a cold climate. Specify the required admixtures and their roles.
Think about each admixture's contribution to performance.
Evaluate a concrete project in a hot climate where the contractor must ensure sufficient workability and avoid rapid setting. What admixtures would you recommend and why?
Consider how heat affects cement hydration.
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