Home › B.Tech Civil › civilengineering › Testing of Concrete › In a compression test on a concrete cube using a…
In a compression test on a concrete cube using a UTM, at what uniform rate is the uniaxial compressive load applied until destruction?
Answer & Solution
Correct answer: B.
1. The IS code prescribes a uniform compression rate so strain-rate effects are controlled.
2. For cube testing the rate is 14 N/mm² per minute applied until the specimen crushes.
3. The peak load at crushing divided by the cross-sectional area gives the cube strength.
4. The 7 N/mm² value belongs to flexure (rate of extreme-fibre stress), not cube compression.
5. Rates of 10 or 21 N/mm² per minute are not specified.
_Source: IGNOU ET-522 Concrete Technology, Block 2 Unit 9 "Testing of Concrete"._
Related questions
Compared with the direct tensile strength of the same concrete, the modulus of rupture obtIn the resonant frequency method, the dynamic modulus of elasticity of a concrete specimenCracks and voids inside concrete affect ultrasonic pulse velocity only when their plane isUsing the Leslie–Cheesman classification (Table 9.1), a pulse velocity reading of 3800 m/sThe portable instrument used for measuring ultrasonic pulse velocity through concrete withTo get a representative rebound number from a Schmidt hammer on a concrete area, the unit The rebound hammer commonly used in non-destructive testing of concrete was developed in 1A core has been cut with a length-to-diameter ratio of 0.85 from a slab. As per the unit,