Alkaline binders based on volcanic additives

The key point in the development of the technology of alkaline activation of fine materials of aluminosilicate nature was the unique properties of clinker-free composites, allowing their use in hydraulic engineering, at high temperatures to obtain heat-resistant concrete, during urgent repair work, because of the short setting time, in the production of massive products and structures to work in conditions of negative temperatures and aggressive acidic environments. Prospects and relevance of the development of this direction of alkaline cements is proved by the current world trends of increasing the proportion of research in this area. Studies at the micro level have confirmed the presence of such minerals as calcite, quartz anorthite, mica like muscovite in the hydration products of cement alkaline stone.