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Q: Which of the following is NOT a cause of segregation in concrete?
  • A. Similarity in the specific gravity of aggregates
  • B. Long time mixing of concrete
  • C. Improper mixing of concrete ingredients
  • D. Excess use of water
Correct Answer: Option A - Some of the conditions which are conducive mix to segregate. (i) Use of poor- quality constituent materials (ii) Poorly proportioned concrete mix. (iii) Insufficiently mixed concrete. (iv) Careless transportation. (v) Too high drop (vi) Excessive wafting on concrete. (vii) Improper compaction
A. Some of the conditions which are conducive mix to segregate. (i) Use of poor- quality constituent materials (ii) Poorly proportioned concrete mix. (iii) Insufficiently mixed concrete. (iv) Careless transportation. (v) Too high drop (vi) Excessive wafting on concrete. (vii) Improper compaction

Explanations:

Some of the conditions which are conducive mix to segregate. (i) Use of poor- quality constituent materials (ii) Poorly proportioned concrete mix. (iii) Insufficiently mixed concrete. (iv) Careless transportation. (v) Too high drop (vi) Excessive wafting on concrete. (vii) Improper compaction