Practice Chemical Admixtures (2.3.5) - Lightweight Concrete (LWC) - Civil Engineering Materials, Testing & Evaluation

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9 questions

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6 sample questions

Question 1.
What is a chemical admixture?
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Think about ways concrete can be improved.
Question 2.
Name one type of water-reducing admixture.
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Consider a term that describes their function.
3Question 3.
What type of admixture delays setting time?
- Accelerator
- Retarder
- Water-Reducer
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Think about conditions when concrete is poured.
4Question 4.
True or False: Air-entraining agents improve resistance to freezing conditions.
- True
- False
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Consider cold weather impacts on concrete.
Question 5.
You are tasked with reducing the water content in a concrete mix while ensuring it maintains its workability. Explain how you would incorporate a water-reducing admixture.
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Consider testing different admixtures and their impact on the mix.
Question 6.
Imagine you are in charge of a major pour during winter. Discuss how you would use retarders and accelerators effectively in your mix design.
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Combine these additives strategically to combat temperature effects.

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