Concrete mix

For you in Civil Engineering must know about concrete. here I only share my little knowledge of it....

Concrete is one of material that used to made a building besides metal and wood.
concrete has special characteristic that made some people love it.
it can be made in any shape as long doesn't pass the first time setting.
time setting is a duration from cement where mix with water to the time where the cement can't react more with the water and should not disturb the bounding.

concrete made from 4 main element which is