gas turbine foundation

This is not enough information. For a mix design, you need a foundation design. For a foundation design you need to know something about the bearing subgrade, seismic conditions, etc.. You also need to know the inprotance of the structure, the amount of acceptable seetlements and differential settlements for the components bearing on the foundation, vibration loading, point loads, general areal live and dead loads, special loading factors of safety, etc.. You must also consider any usual impacts for the usage, such as heat or reactive liquids, etc..

thanks , but amount of mixture in concrete, regarding material strength for option i am working in gsa turbine which is near the sea shore and 37.5m above sea level then what will be the design of concrete.

i am a new joining this is my first project ,for GT foundation