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2 cards from this section. Quick, good the night before a test.
What is voids content in aggregates?
It relates to how much paste we need in a concrete mix.
How does the shape of aggregates affect voids content?
Think about how tightly the pieces fit together.
What does voids content represent in aggregates?
Think about what it tells us regarding how densely packed the aggregates are.
True or False: A lower voids content requires more paste in concrete mixture.
Consider the relationship between gaps and the paste required.
You are provided with two types of aggregates: X (30% voids) and Y (15% voids). If a concrete mix requires an overall voids content of 20%, how would you mix the two aggregates to achieve the desired voids content?
Remember the laws of averages in mixing different proportions and their voids.
Consider a scenario where aggregates are improperly packed leading to higher voids content than anticipated. Discuss the potential challenges this may cause in a structural concrete application.
Think about how the voids could affect water interaction with the concrete.
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