Building Materials, Third Edition

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3. Corrosion of reinforcement is not a problem if concrete is of good quality

Of the above statements

(a) 1 and 2 are correct (b) 1 and 3 are correct

(c) only 1 is correct (d) 1, 2, 3 are correct

6. Consider the following statements:
   The effect of sea water on hardened concrete is to
   
   
   1. increase its strength 2. reduce its strength
   
   
   2. retard setting 4. decrease its durability
      Of these statements
      (a) 1 and 3 are correct (b) 2 and 3 are correct
      (c) 2 and 4 are correct (d) 1 and 4 are correct
   
   
   
   

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1. (a) 2. (c) 3. (b) 4. (d) 5. (d) 6. (c)