ALUMINOUS BINDING MATERIALS BASED ON THE SLAG OF ALUMINOTHERMAL PRODUCTION OF FERROTITANIUM AND CELL CONCRETE ON THEIR BASIS

Abstract

The modified aluminous binding material is developed on the basis of aluminous cement, slag of
aluminothermal output of ferrotitanium and superplasticizing admixtures based on polycarboxylic ether.
The peculiarities of hydration of binding materials in the presence of these additives are examined by the
methods of physical and chemical analysis. It’s shown that at the initial stages of hardening (3–7 days) the
speed of hydration of calcium aluminates to different extents is reduced under the influence of superplasticizing
admixtures based on polycarboxylic ether. The additives which at least slow down hardening are
revealed, their optimal doses are specified. The influence of these additives on a binding property is examined.
The modified binding material with increased fire resistance (1520–1550 С) is obtained. It’s
shown that the use of superplasticizing admixtures based on polycarboxylic ether provides the binding
material, which contains the slag of aluminothermal output of ferrotitanium, with high strength properties.
The heat-resistance cell concrete with the operating temperature up to 1300С is produced on the basis of
the developed binding material, fire clay and fireproof aggregates.
Keywords: heat-resistance cell concrete, high-alumina cement, aluminous cement, modified aluminous
binding, slag of aluminothermal production, slag of ferrotitanium, superplasticizing admixtures
based on polycarboxylic ether, heat-resistant properties, fire resistance, hydration of calcium aluminate,
calcium aluminate hydrate