Alumina Cement

alumina cement

[ə′lüm·ə·nə si′ment]
(materials)
A cement made with bauxite and containing a high percentage of aluminate, having the property of setting to high strength in 24 hours.

Alumina Cement

 

a rapid-hardening hydraulic binding material; a product of the fine grinding of clinker produced by roasting (prior to smelting or calcining) of the raw mix, which consists of bauxites and limestone material. The raw mix is roasted and smelted in blast furnaces, electric furnaces, rotary kilns, or cupola furnaces. According to the content of A1203 in the finished product, a distinction is made between ordinary alumina cement (up to 55 percent) and high-alumina cement (up to 70 percent). The smelting temperature of a raw furnace charge of ordinary alumina cement is 1450°-1480° C, whereas for high-alumina cement it is 1700°-1750° C.

Alumina cement is characterized by a rapid increase in strength, a high degree of exothermy during hardening, increased resistance to corrosion in sulfate environments, and high fire resistance. In comparison with portland cement, alumina cement makes possible the production of concretes and mortars with higher density and water resistance.

I. V. KRAVCHENKO

References in periodicals archive ?
Limited Tenders are invited for High Alumina Cement
Different types of cement are air-entraining cement, blast furnace slag cement, colored cement, high alumina cement, hydrographic cement, low heat cement, pozzolanic cement, quick setting cement, and white cement.
Two tenders requesting international offers to supply (a) 1,000 Kg cyanide salts, also (b) 180 tons calcium alumina cement (hydraulic refractory cement).
By mixing complex or multicomponent binder (constituents are high alumina cement, metallurgical slag and liquid glass solution) with firestone (fine size up to 1 mm) aggregate refractory concrete was produced.
High alumina cement had been found to have been used there.
Thermally stable aggregates combined with high alumina cement are the principal ingredients of monolithic acidic refractories.
It was said that these structures were mistakenly constructed from high alumina cement which has resulted in them crumbling over the years to expose rusting internal reinforcement bars.
My statues of humans and animals are made from metal and mesh armature then a high alumina cement and coated with fibreglass resin.
It was formulated using calcium alumina cement and iron ore slag, resulting in a product with high performance characteristics and a post consumer recycled content of approximately 30 per cent, which exceeds the requirements laid down in Leed.
Tenders are invited for Global Tender For Procurement Of 160 Tons Of High Alumina Cement Grade A
Tenders are invited for Supply of Super refractory castable type high alumina cement