Use a mechanical mortar mixer or a wheelbarrow for more than 15 pounds of concrete. For easy clean-up, immediately rinse your mix tub and propeller blades. To ensure consistent color in multiple castings, mix your water and color in large quantities, and stir and measure as needed for each casting. Concrete vs. Cement. The most important thing to remember is that cement is a dry powder.
Cement is only cement as long as it remains dry and loose.
Concrete, in its proper form, is the coarsest mixture of cement, water, sand and gravel. It is used for roads, sidewalks, bridges, pool decks, etc. Mortar usually refers to the cement, water and sand mix that is stiff enough to support rock or bricks during its moist state. Grout is a finer textured mixture of cement, water, fine grain sand and often pigment, to give it color. Grout is usually the most fluid of the cement mixtures to allow it to flow smoothly between tiles and joints.