PARAMETERS OF ASH DRAIN ACTIVATION AS A BINDER WHEN MAKING A CONCRETE

The relevance of the study is explained by the fact that increase in using commodity cement in manufacture of concrete, including filling mixes for mining, is accompanied by growth in production rate of raw materials for its production and emission of dust-gas pollutants into the atmosphere. One try to find the ways of replacing it by waste from related industries, such as fly ash from coal combustion in thermal power plants. The aim of the study is to prove that alternative sources of binding components can compete with commercial cement in basic quality indicators, already produced and damaging during storage without recycling. The main research method is an industrial and laboratory experiment with modeling the cementitious binders. The obtained indicators are systematized, interpreted graphically and they are the basis for decision-making. Results. The authors have proved the possibility and expediency of partial replacement of marketable cement by fly ash from coal combustion in thermal power plants with appropriate training in activators-disintegrators. The quantitative values ​​of relationship between complex binder consumption and concrete mix strength are experimentally determined, which makes it possible to correct cement consumption while maintaining the desired quality of concrete. The role of mixing operation was detailed to improve the strength of the mixture by comparing possible methods of mixing manually and in disintegrators. The range of expediency of preparing additives for cement was established. Findings. The addition of fly ash at joint activation with cement can be used as a binder for manufacturing concrete in certain ranges of preparation modes.