About the Use of Complex Additives in Concretes of a New Generation

Issues of the technological design of high-strength concretes of a new generation with complex additives on the basis of up-to-date super-plasticizers and mineral fillers of different chemical-mineralogical compositions are considered. Main factors which determine the efficiency of thin-disperse fillers in the concrete technology are highlighted. It is shown that min- eral micro-fillers for high-strength concretes along with the high rheological activity in plasticized concretes should have hydration activity. A series of x-ray-phase studies for determin- ing the character of influence of modern super-plasticizers on the composition of cement hydration products were conducted. It is shown that super-plasticizers Melflux help to slow down the processes of hydration of silicate phases of cement and stabilization of hydro-aluminate phases. It is established that a thin-disperse carbonate micro-filler contributes to the activation of cement silicate phases. Additives of a new class, viscosity regulators of concrete mixes as well as synthesized nano-metric calcium hydro-silicates performing the role of crystallization centers in the cement stone structure, are attributed to prospective for the use in the technology of concretes of a new generation

V.I. KALASHNIKOV , Doctor of Sciences (Engineering),
O.V. TARAKANOV, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Penza State University of Architecture and Civil Engineering (28, Germana Titova Street, Penza,440028, Russian Federation)

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