What is a segregation of concrete?

Segregation in concrete is a case of particle segregation in concrete applications, in which particulate solids tend to segregate by virtue of differences in the size, density, shape and other properties of particles of which they are composed.

Bleeding (conc.) The term given to the process by which water rises to the surface giving a puddling effect on top of the laid concrete. This is caused by excessive water in the mix, particularly prominent in cold weather.