Concrete Technology – Page 2

The concrete mix of grade M 25 means that the compressive strength of 15 cm cubes at 28 days after mixing is?

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voids in the coarse aggregate are filled by the fine aggregates
volume of fine aggregates required for 1 m' of coarse aggregate is equal to total voids in coarse aggregate plus 10% aggregate extra to allow for additional voids created by wedging action
volume of cement paste required for 1 m' of coarse aggregate is equal to total volume of voids in the fine aggregate plus 15% aggregate extra to allow for additional voids created by wedging action
all of the above

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