It is always wise to order two or three extra barrels of cement, if the dealer is at considerable distance, as this avoids any possible trouble that a shortage might cause. Besides, any cement left over always comes in handy for repair work around the house or barn.
Forms for Concrete
Concrete is a plastic material and before hardening, takes the shape of anything against which or in which it is placed.
Naturally, the building of the Form is a most important item in the success of the work.
These Forms hold the concrete in place, support it until it has hardened and give it its shape, as well as its original surface finish.
Kinds of Forms
Almost any material which will hold the concrete in place will do for a Form. Concrete foundations for farm buildings require shallow trenches, and usually the earth walls are firm enough to act as a Form.
Molds of wet sand are used for ornamental work. Frequently colored sands are used for this purpose, providing both the finished surface and color to the concrete ornament.
Cast, wrought or galvanized iron is used, where an extremely smooth finish is desired, without further treatment upon the removal of the Forms. Forms made of iron are more easily cleaned, and can be used a greater number of times than those of wood. Rusty iron, however, should not be used.
By far the greatest number of Forms are made of wood, owing to the fact that lumber in small quantities can always be obtained.