Question

The concrete may be accepted if the average equivalent cube strength of the cores, is at least $85\text{\%}$ of the cube strength of the concrete grade at the specified age and no individual core possesses strength less than :

• A. $0.35$
• B. $0.75$
• C. $0.5$
• D. $0.25$

Answer 1

The correct option is B $0.75$

The concrete may be accepted if the average equivalent cube strength of the cores, is at least $85\text{\%}$ of the cube strength of the concrete grade at the specified age and no individual core possesses strength less than $75\text{\%}$.