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Q: When HYSD bars are used in place of mild steel bars, the bond strength
  • A. Increases
  • B. Decreases
  • C. Does not change
  • D. Become zero
Correct Answer: Option A - The HYSD bars have better bond with concrete due to corrugations or ribs on the surface of the bars. As per IS 456:2000, the bond strength of HYSD bars is 60 percent greater than the plain mild steel bars
A. The HYSD bars have better bond with concrete due to corrugations or ribs on the surface of the bars. As per IS 456:2000, the bond strength of HYSD bars is 60 percent greater than the plain mild steel bars

Explanations:

The HYSD bars have better bond with concrete due to corrugations or ribs on the surface of the bars. As per IS 456:2000, the bond strength of HYSD bars is 60 percent greater than the plain mild steel bars