Kaveryn K. High-strength lightweight concrete based on Portland cement, modified with complex organo-silica additives

The object of researches is the processes of structuring of claydite concrete mixtures and light high-strength concrete based on it, obtained by using Portland cement modified with organosiliconic additives. The subject of research is high-strength lightweight concrete expanded clay based on Portland cement, modified with a complex organo-silica additive. Methods of research - modern methods of physical and chemical analysis; statistical experiment planning methods. Novelty - given the theoretical substantiation and experimentally confirmed the feasibility of introducing a complex organo-silica additive on the basis of a polycarboxylate superplasticizer and a microsilica, including a thin-grounded diatomite, into light claydite concrete mixtures. It was proved that the introduction of this complex additive makes it possible to optimize the structure of high-strength lightweight clay concrete on nano-and micro level and increase compressive strength of expanded clay concrete up to 60 ... 68%, frost resistance up to 200%, watertightness by 37%, corrosion resistance by 7.5 ... 24%, as well as a decrease in the relative strain of shrinkage by 16 ... 19% compared with the additive composition. It has been established that when a complex organo-silica additive is added to Portland cement, there is an increase in the number of low-calcium hydrosilicates, and also the germs of hydrogrants and plazolite, which are crystallochemically similar to the above-mentioned compounds, are fixed over time, which, in turn, provides a dense and high-strength structure of cement stone . The results of the work are implemented in the production of building materials. Technical and economical feasibility of study is determined. Industry - construction.