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3 cards from this section. Quick, good the night before a test.
What is a harsh mix?
Think about the characteristics of the mix.
Name one cause of a harsh mix.
Consider the types of aggregates in the mix.
What is the main cause of a harsh mix in RMC plants?
Think about what helps to make the mix smooth.
True or False: A harsher mix can improve the strength of the final concrete structure.
Consider how workability affects the concrete application.
Calculate the optimal fine to coarse aggregate ratio to mitigate harshness in a mix. Given: 30% maximum coarse aggregate size and current fine aggregates at 20%.
Think about what ratio usually works best for concrete and adjust accordingly.
Case Study: During a site evaluation, a harsh mix was discovered causing placement issues. Suggest a step-by-step approach to resolve this, including material adjustments.
Consider what the first steps in resolving a construction issue might involve.
5 more questions in this section. Enroll free to practise them all.
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