SU62351A1 - The method of preparation of silico-calcium cement - Google Patents

Description

The inventions relate to methods for producing silico-calcium cement by grinding and mixing a non-expanding part of the product of the yoke (a mixture of quartz sand with limestone) with a sandy part.

Unlike partland cement, which is made from artificial mixtures of materials containing lime and clay, for the preparation of silico calceous cement, an artificial mixture of materials containing lime and quartz is offered.

The described method consists in the fact that the mixture of thin-grinded quartz sand (or quartz) and lime is subjected to single firing in rotary kilns. In this case, the calcination product will consist of tricalcium and dicalcium silicates, the latter being represented mainly in gamma form. Following this, the calcination product will be more or less self-dissipating. The degree of self-scattering will depend on the ratio of the amounts of two- and three-calcium silicate. The undissolved portion of the calcined material is subjected to grinding and

Smuschen u with raon1shvashns oyoooohitelno natvrnalom. In rezudteha sioaEnI I get a powder, which is called silico calcene cement, as it consists only of calcium carbonate I8 SNC. This cement differs both in its raw material and composition of the product, and in its properties from the cements, and all of the products in the living substances of the latter.

Silicocalcium cement has the property of resistance to sulphate and vgrvss.

SUBJECT OF INVENTION

The method of preparing silicon-calcium cement by burning a mixture of quartz sand with lime, characterized in that the non-spreading part of the burning product is crushed and mixed with a self-spreading part.