7.6.1 - Chemical Admixtures
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Practice Questions
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What is the role of plasticizers in concrete?
💡 Hint: Think about how they help in mixing.
Name one condition where a retarder would be necessary.
💡 Hint: Consider the weather impacts on concrete.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What type of admixture is used to increase flowability?
💡 Hint: Think of terms related to 'extra fluid' in concrete.
True or False: Retarders speed up the setting time of concrete.
💡 Hint: Consider the purpose of retarders in hot weather.
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Challenge Problems
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Given a project scenario where the concrete needs to set quickly due to cold temperatures, which admixture would be advisable? Justify your choice based on how it affects the setting time.
💡 Hint: Think about how temperature affects curing times.
In a hot weather project, the concrete is setting too quickly, leading to quality issues. Describe how using a retarder could resolve this issue.
💡 Hint: Consider why you would want more time when working in heat.
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