What is the balanced equation for concrete?

Answer 1

Small amounts of concrete can be easily mixed in a wheelbarrow with a spade but larger amounts might require a concrete mixer.

Towable concrete mixers, both electrical and mechanical (petrol) can be hired from hire plant depots.

Mix in the wheelbarrow or concrete mixer, cement, gravel, sand and water.

For general purpose concrete the mix can be 1 part cement, 2 parts sand and 3 parts gravel.

Most cement bags will have mixture recommendations written on the bags. The mixture of cement, sand and water is going to vary depending on the planned use of the surface.

Answer 2

Concrete is a complex mixture, not a compound - any formula or "equation".