Answer / gaurav khurana

For RCC work : Using OPC 43 grade

M-20 : 325 kg and admixture 0.92% by weight of cement

M-25 : 360 kg and admixture 0.98% by weight of cement

M-30 : 400 kg and admixture 1.10% by weight of cement

M-35 : 408 kg and admixture 1.15% by weight of cement

M-40 : 415 kg and admixture 1.20% by weight of cement

M-45 : 425 kg and admixture 1.25% by weight of cement

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