Obtaining sodium silicate solutions for the activation of mineral powders

Currently, the creation of clinker-free binders that do not require high-temperature processing and a substantial natural resource, and have high technical indicators, is an urgent task. The active component of alkali metals characterizes alkaline cement. A distinctive feature of alkali cement is its ability to interact with aluminosilicate minerals during hydration, which leads to the formation of active and hardly soluble compounds. The basis for the production of concrete composites based on chemical activation binders is the domestic and foreign experience in the use of slag-alkali composites in construction. In this work, an energy-dispersive microanalysis of clinker-free compositions based on alkaline silicate of sodium solutions from silica-containing rocks is carried out. The developed formulations of clinker-free binders based on highly dispersed powders of different nature, sealed with an alkaline solution prepared by the wet method at temperatures up to 95 °C and atmospheric pressure. This technology expands the scope of alkaline cement and produces concrete with desired properties. This work was carried out as part of research on the implementation of scientific project No 05.607.21.0320. "Development of technology for new building composites on clinkers alkaline binders using substandard natural and secondary raw materials," which received support from the federal target program "Research and Development in Priority Directions for the Development of the Russian Science and Technology Complex for 2014-2020."