SSC JE Civil Engineering 23-Sep-2019 Shift 1 Solved Paper

Question : 173 of 200

Marks: +1, -0

As per IS 13311 (Part 1), in the ultrasonic test for hardened concrete, good quality of concrete is indicated if the pulse velocity is:

Pulse Velocity	Quality of Concrete
> 4.5 km/s	Very good to excellent
3.5 – 4.5 km/s	Good to very good, slightporosity may exist
3.0 – 3.5 km/s	Satisfactory but loss of integrity is suspected
< 3.0 km/s	Poor and los of integrityexist.

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