Home › B.Tech Civil › civilengineering › Testing of Concrete › A core has been cut with a length-to-diameter ra…
A core has been cut with a length-to-diameter ratio of 0.85 from a slab. As per the unit, the recommended action is:
Answer & Solution
Correct answer: B.
1. The cut core must have a length-to-diameter ratio between 0.95 and 2.0.
2. If the ratio exceeds 2.0 it can be ground from the ends down to that range.
3. If the ratio is below 0.95 the specimen is invalid and must be discarded.
4. Grinding cannot increase a short core's length, so option B is impossible.
5. C2 of 0.50 is not the prescribed correction.
_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 1For a test core cut from a structure, the cube-equivalent strength is estimated as cube st