Физико-химические основы создания барийсодержащих радиационностойких цементов

Abstract

Theoretical bases of reception of a new class barium-containing polyfunctional cements in system BaO – Al₂O₃ – Fe₂O₃ – SiO₂ which are based on a basis of fundamental laws of thermodynamics in the appendix to phase balance in multicomponent oxides systems BaO – Al₂O₃ – Fe₂O₃ – SiO₂ in subsolidus areas are created. Taking into account the established laws main principles of reception barium-containing cements of a new class of polyfunctional purposes with a complex of the set operational characteristics synthesized in the conditions of sharp and slow cooling, determined by possibilities of convertibility of thermodynamic balance in solid-phase system BaO – Al₂O₃ – Fe₂O₃ – SiO₂ reactions are formulated. The features of phase formation mechanism, defined by the reaction rate and the activation energy of the process of barium-containing cement the new class. Experimentally established process parameters produce cement. Designed rational compositions and defined physical, mechanical, thermal, physical and technical properties of barium-containing cement. The features of the mechanism and the products of hydration of cement investigated. Designed concrete on the basis of the new class of cement, selected the type and the proportion of fractions of aggregate, forming method; defined physical, mechanical, thermal and physical-technical properties of concrete. The possibility of using the materials developed in the leading industries of Ukraine.