Grabovchak V. Alkali activated fly ash containing cements and concretes on their basis

Object of study - methods of control of structure formation processes of alkali activated fly ash containing cements and concretes on their basis in direction of increasing their technological-related properties and effectiveness during exploitation. Subject of study - alkali activated fly ash containing cements and concretes on their basis. The purpose of research - development of technology of regulation of structure formation processes in fly ash containing cements and concretes on their basis with increased technological-related and exploitation properties. Methods of research - modern methods of physical-chemical analysis; statistic methods of experiment planning. Innovation - it was developed knowledge about mechanism of influence of admixtures of different basisity on rate and direction of passing processes of structure formation in alkali activated fly ash containing cements with sodium carbonate and sodium lignosulphonate presence and were set ranges of correlations between dry components; it were set regulations of changes of heat emission of fly ash containing cements depending on type and quantity of calcium-containing and alkaline components, that made it possible to recommend technological methods of concrete care during hardening in different temperature conditions (t = +5...+30 °С); it were determined peculiarities of concrete structure formation in different thermal-humidity conditions and were shown that for slowing processes of mass transfer of alkaline ions because of temperature and humidity gradients it is effective to introduce into concrete composition admixtures of hydrophobic and redispersive film-foarming action; determined peculiarities of composition formation of corrosion resistant concrete, which are caused by his micro and macrostructure, are depending from type and quantity of calcium-containing component and characterized by new formation synthesis, where are prevail phases of low-basic hydro silicates and alkaline hydro alumina silicates.