Abstract
The article considers the results of a study of fly ash from the Ekibastuz coal basin in the production of cellular concrete. Studies have shown that the composition of fly ash is very complex in terms of the variety of chemical elements and its use as a siliceous component instead of sand has a beneficial effect on the value of the W/S ratio. A study of the pore structure of cellular concrete showed that an increase in the W/S ratio leads to a sharp change in the nature of the porous structure, that is, the higher the W/S, the higher the quality of its porous structure. However, an excessive increase in W/S causes stratification of the solution. In order to establish the optimal value of the W/S ratio using fly ash, studies were carried out. The results of a study to determine the influence of the porous structure of cellular concrete on its properties clearly showed how, with increasing W/S ratio, the porosity deviation index decreases, and the lower the porosity deviation, the better the characteristics of the macropores of cellular concrete, and accordingly, the higher the strength of aerated concrete.
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