Question$2.$

Design a M$30$ grade concrete for severe condition of exposure $.$ Use OPC $43$ grade cement, and fly ash as cementitious materials, maximum $20mm$ size aggregate, zone II sand, slump $75mm,$ degree of supervision fair, angular aggregate, super plasticizer with $22\%$ reduction capacity. Use $1\mathrm{.}4\%$ Plasticizer by mass of cement. Assume fly ash @ $25\%$ of cementitious material. Increase cementitious material content by $5\%.$

Specific gravity of cement $=3\mathrm{.}14$

Fly ash $=2\mathrm{.}2$

Coarse aggregate $=2\mathrm{.}78$

Fine aggregate $=2\mathrm{.}65$

Plasticizer $=1\mathrm{.}05$