The use of basic iron-oxide pigments for obtainment of a wide color range of decorative concretes

This article presents an empirical study on mixing of pigments and alternating their dosage in different ways in order to obtain a wide range of colors of decorative concrete. This study will be a useful guide for laboratories at various plants which produce reinforced concrete products and structures and which would like or are already using pigments of the basic colors. During the research, combinations of pigment colors for replacement of commercial mixtures of pigments (orange, light brown, dark brown) have been determined; different shades of decorative concrete with given composition have been obtained; some properties of concrete mixture containing iron-oxide pigments have been tested together with strength characteristics and durability parameters of decorative concrete; a positive economic effect has been obtained after refusing to use commercial products and additional equipment for their storage, supply, dosing, etc.