Construction binders and environmental indicators of their production

Abstract

A comparative analysis of carbon dioxide emissions during the burning of Portland cement clinker, lime and gypsum was performed. The interrelation between energy indices and the emission of carbon dioxide is shown. The quantitative indices of atmospheric pollution in the manufacture of binders are given. Ecological expediency of production of gypsum and cement clinker in comparison with lime is shown. The article is made rough calculation of environmental pollution by carbon dioxide, which is produced and released into the atmosphere during the production of building binders. It was determined the directions of reducing the formation of gases during firing of the substances to reduce environmental pollution: decrease in endothermy of chemical transformations; reduction of the content of calcium and magnesium carbonates in the feedstock mixture; reduction of raw material moisture; reduction of fuel consumption for the process; increasing the technological efficiency of the process. It was determined the directions of reducing the formation of gases during firing of the substances to reduce environmental pollution. It is shown that carbon dioxide is released into the Earth’s atmosphere in the amount of more than three billion metric tons per year by enterprises that produce cement, lime, and gypsum.