search
arrow-left Previous
Next arrow-right
Q: Concrete in the member represented by a core test shall be considered acceptable if the average equivalent cube strength of the cores is equal to at least q percent of the cube strength of the grade of concrete, where q (%) is:
  • A. 95
  • B. 85
  • C. 65
  • D. 75
Correct Answer: Option B - According to IS 456 : 2000 that the concrete in the member represented by a core test shall be considered acceptable, if the average equivalent cube strength of core is equal to at least 85% of the cube strength of the grade of concrete specified, but no individual core has a strength less than 75%. (Clause 17.4.3)
B. According to IS 456 : 2000 that the concrete in the member represented by a core test shall be considered acceptable, if the average equivalent cube strength of core is equal to at least 85% of the cube strength of the grade of concrete specified, but no individual core has a strength less than 75%. (Clause 17.4.3)

Explanations:

According to IS 456 : 2000 that the concrete in the member represented by a core test shall be considered acceptable, if the average equivalent cube strength of core is equal to at least 85% of the cube strength of the grade of concrete specified, but no individual core has a strength less than 75%. (Clause 17.4.3)