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Requirements relating to the quality of the flue gases produced have become more and more stringent in recent years. This is why the electricity producers, especially those using coal-fired units, have been forced to introduce additional environmental technologies. However, most of the coal-fired power plants and waste incineration plants in the Czech and Slovak Republics are following the same path, in particular for economic reasons. They are introducing the selective non-catalytic reduction of nitrogen oxides (...

Article is describing results of an experimental program focused on development of concrete, resistant to impacts of low pH environment. To a very low pH (2-4) is concrete often exposed when used in agricultural production (for example for silage or hay silage pits). Therefore, its degradation with such a low pH is very fast. The experimental part of the work focused on modification of concrete with sealing admixture on the basis of styrene-acrylate. We prepared set of 3 concrete mixtures with different dosing of ...

The ternary gypsum-based mortar, composed of gypsum, hydrated lime, silica fume, and standard sand was investigated. The system gypsum-lime- silica fume was prepared in order to improve the resistance of gypsum-based materials against water. The silica fume, as a pozzolan admixture, reacts with hydrated lime and forms CSH phases in the material. The method of storage has the influence on the development of material structure, its composition and properties. Therefore the samples were stored in two different enviro...