Concrete maintains the shape of formwork, i.e., centering work. Thus, keeping the required shape through formwork, viz., undulated fashionable shapes, V-shaped finishes, plain surfaces, etc., any pleasing surface can be obtained. The imaginative ideas of architects may be implemented by a careful formation of concrete surface.
A properly made out formwork can give a very smooth surface using the right proportioning of materials better than that made by the best mason. Because of increasing cost of labour, self-finishing concrete surfaces are preferred.
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