ИССЛЕДОВАНИЕ ВЛИЯНИЯ ДОБАВКИ АКТИВНОГО КРЕМНЕЗЕМА НА СВОЙСТВА ВЯЖУЩИХ ЩЕЛОЧНОЙ АКТИВАЦИИ

Abstract

The world experience of implementation and the uniqueness of building alkaline composites prove the prospects and relevance of the development of clinker-free technology. The development of formulations of alkaline activation binders based on fine powders of aluminosilicate nature will allow obtaining new effective and high-quality products. The paper investigates the effect of active microsilica on the kinetics of strength gain, changes in density and pore space of cement stone, formulation and technological factors and hardening conditions. The chemical transformations of active silica under alkaline conditions, leading to changes in the pH value, have been substantiated. By electron microscopy, the foundations of the formation of the structure of a cement stone on a binding bond "aspiration dust (60%) - clinker dust (40%) - microsilica - Na2SiO3" amorphous substance, calcium sulfoaluminates, calcium hydroaluminates are developed. According to authors, the research results are important for the construction industry, since the proposed formulations of clinker-free cements can replace expensive and energy-intensive Portland cement, making it possible to create strong and durable concrete and reinforced concrete structures