Abstract Cement is disclosed having the following composition, in percent by weight: 20 to 75% of highly basic calcium chlorosilicate, 10 to 55% of calcium chloro-orthosilicate, 0.5 to 30% of calcium chloroaluminate, 2 to 20% of calcium chloroalumoferrite; cement of the foregoing compositions is produced by calcining at a temperature within the range of from 1,000° to 1,200° C. a raw mixture containing a calcareous component, silicaceous component, aluminous component, ferrous component, magnesium-containing component and calcium chloride in particular proportions, and then grinding the resultant cement clinker. This cement features a reduced heat emission in the initial stage of the hydration process and possesses a high activity. No corrosion of steel reinforcement is observed in concretes produced from the present cement. The cement can be used in heavy-duty concrete structures such as hydropower dams, in the production of high-strength concretes and ferroconcrete structures. The present process involves calcination at lowered temperatures and makes it possible to obtain a cement clinker possessing a high porosity and increased grinding ability thus reducing power consumption for its grinding by 2-2.5 times.
Cement consisting of a highly-basic calcium chlorosilicate, calcium chloro-orthosilicate, calcium chloroaluminate and calcium chloroalumoferrite, the components being present in the following proportions, percent by weight: highly-basic calcium chlorosilicate: 20 to 75 calcium chloro-orthosilicate: 10 to 55 calcium chloroaluminate: 0.5 to 30 calcium chloroalumoferrite: 2 to 20.
Claim 2
Dependent Claim
46 words
Cement consisting of a highly-basic calcium chlorosilicate, calcium chloro-orthosilicate, calcium chloroaluminate and calcium chloroalumoferrite, the components being present in the following proportions, percent by weight: highly-basic calcium chlorosilicate: 20 to 75 calcium chloro-orthosilicate: 10 to 55 calcium chloroaluminate: 0.5 to 30 calcium chloroalumoferrite: 2 to 20.
Claim 3
Dependent Claim
22 words
Cement according to claim 1, in which the heat emission J./g. during the first day of hydration is about 115 to 140.
Claim 4
Dependent Claim
23 words
Cement according to claim 1, in which the heat emission J./g. during the first three days of hydration is about 165 to 196.
Claim 5
Dependent Claim
32 words
Cement according to claim 1, which has an ultimate compression strength after 28 days of hardening in water at a temperature of about 20° C. of about 400 to 500 kgf./cm. 2
Claim 6
Dependent Claim
22 words
Cement according to claim 1 in which said cement is prepared by calcination at a temperature of from 1000° to 2000° C.