25.5 - Example 1
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Practice Questions
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What is aggregate gradation?
💡 Hint: Think about how we classify different sizes of materials.
Define proportioning in the context of asphalt mix design.
💡 Hint: Consider how we decide on the proportions for a mixture.
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Interactive Quizzes
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What does gradation in asphalt mix design refer to?
💡 Hint: Consider how the sizes of materials impact the overall mixture.
True or False: Proportioning is essential for achieving the correct asphalt mix characteristics.
💡 Hint: Recall the importance of getting the correct mix in construction.
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Challenge Problems
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Suppose you have aggregates A, B, and C with the following passing percentages for two sieve sizes: Sieve 1 - A: 100%, B: 80%, C: 70%; Sieve 2 - A: 70%, B: 50%, C: 30%. Establish the equations and solve for x1, x2, and x3 if required proportions are x1 + x2 + x3 = 1 and x1 + 0.8x2 + 0.7x3 = 0.9.
💡 Hint: Start by setting up your equation as discussed and isolate the variables step-by-step.
Design a mix using at least four aggregates to meet specified gradation criteria of a construction project, considering a maximum of 2% of a particular aggregate type not exceed the limits.
💡 Hint: Remember to clearly define your aggregate limits and establish your equations based on what's required.
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