i want to know the concrete mix quantity for column of 8x12 for 10 feet height

Dear Rajeev

           In RCC column use cement concrete mix 1:1.5:3.

Total volumn of ur column is ( 0.66 x 1 x 10 feet ) = 6.6 cubic feet.

Concrete mix will be 1 : 1.5 : 3

You require one part of cement = 6.6 x 1 / 5.5 = 1.2 cubic feet

Sand required                             = 6.6 x 1.5 / 5.5 = 1.8 cubic feet

Aggregate required                   = 6.6 x 3 / 5.5  =  3.6 cubic feet