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Author Question: Concrete normally attains its design strength in about _____. a. 14 days b. 21 days c. 28 days ... (Read 86 times)

Mr.Thesaxman

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on: Jul 24, 2018
Concrete normally attains its design strength in about _____.
 
  a. 14 days
  b. 21 days
  c. 28 days
  d. 30 days

Question 2

Steel is used for reinforcement because it _____.
 
  a. will not corrode
  b. has nearly the same temperature expansion and contraction rate as concrete
  c. has a lower temperature expansion and contraction rate than concrete
  d. is inexpensive


ryhom

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Reply #1 on: Jul 24, 2018
Answer to Question 1

c

Answer to Question 2

b


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