Abstract
Decorative concrete refers to a special kind of concrete. Products made of decorative concrete must meet, in addition to the increased requirements for appearance, certain architectural expressiveness and also certain indicators for strength, durability, and environmental friendliness. In addition, one should strive to reduce the cost of both decorative concrete and products made of such concrete. The analysis is carried out, experimental researches of qualitative indicators of industrial man-caused wastes are also studied: carbide lime, fluoride, sludge-lignin, their material and chemical composition. The possibility of using the analyzed industrial wastes as raw materials for production of white and color cements is established. The physicomechanical properties of the obtained cements and decorative concretes on their basis are studied, the economic efficiency of the proposed technology is determined.
Highlights
In recent years, decorative concretes are increasingly used in construction for the architectural expressiveness of buildings and structures
The average result of the whiteness ratio is 72%. This allows us to declare the receipt of white cement based waste industry in the Irkutsk region
The grinding and mixing of the charge material and the clinker was carried out with the help of a planetary mill, which involves the ingress of iron Fe2O3 into the feed mixture, and it is possible to obtain the lightest cement by avoiding the ingress of iron into the clinker and the charge material
Summary
Decorative concretes are increasingly used in construction for the architectural expressiveness of buildings and structures. Using the plastic properties of decorative concrete, they are widely used for molding products of relief surfaces, sculptures, facing slabs, making floors, bas-reliefs, paving slabs, i.e. such concrete can be configured in a variety of configurations. World practice of construction shows that the field of application of white and colored cements on its basis is as extensive as the usual (gray) and some special types of Portland cement have. White cements are used in the form of facing slabs that perfectly imitate natural stone, plaster, concrete coatings, in the manufacture of floors, steps, sculptures, etc. The Standard GOST 965 (White Portland cement, technical specifications) [1] regulates the compressive strength of cement stone being not less than 39.2 (grade 400)
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