PROPERTIES OF CONCRETE ON ACTIVATED COMPOSITE BINDERS
The properties of concrete on the mechanically activated composite cements have been analyzed. The 4 factorial experiment has been carried out, amount of binder, the proportion of micro silica in the binder, the binder proportion of the ground granulated slag were varying. Also changed the temperature of isothermal holding during the heat treatment of concrete. All blends had the same mobility. It is shown that through the use of composite binding can get concrete with high strength at an early age. Mechanical activation of the binder increases the strength of concrete in 3 days of age at 4...8 MPa, in 28 day of age at 4...6 MPa. Introduction of 10 % micro silica in the composite binder increases the strength of concrete at 5...8 MPa. When used with a binder content of 60 % slag and 10 % micro silica can be obtained concrete, strength and frostresistance are not inferior concrete on pure Portland cement. When using mechanical activation binder concrete frost resistance increased by 50 cycles