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None Concrete Placement Questions

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None Concrete Placement
In a standard concrete mix 25%-35% of the water is used for hydration of the cement. What is the purpose of the remainder of the water in the mix?
  1. to control the rate of setting
  2. to coat each particle of aggregate
  3. maintain water cement ratio
  4. to make the mix workable
None Concrete Placement
What type of cement is used when it is a requirement for the concrete to have a higher resistance to freezing and thawing?
  1. Small cement
  2. Anti freeze cement
  3. Water-less cement
  4. Air-entrained cement
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