Manufacturers do not always have pump grade mixes available, though, so field mixes are sometimes needed. To help ensure smooth pumping and avoid pack-outs, follow these guidelines to prepare the mix.

A long-handled bull float smooths and levels concrete immediately after it has been screeded. For a good finish, professionals warn not to overwork concrete. Photos: Portland Cement Association ...

[Dan] had a bunch of concrete mixing to do. Sure, it was possible to stand there and mix concrete and water in a wheelbarrow for hours and hours but that sounds like a tedious task. Instead, [Dan] ...