Many builders know firsthand that during construction work in most cases it is impossible to do without cement. We offer you to get acquainted with some types of cement.
Cement involves the presence of the following components as a special mixture, which includes clay and limestone, sometimes Mergel can be used. Mergel is a natural mixture that also has clay and limestone in its composition, but it should be said that this natural mixture involves the ideal ratio of the following components. The modern market presents simply an incredible number of names and manufacturers of this product. Cement in Moscow can be purchased at relatively small prices. But the opposite cases are also noted. This is explained by different levels of quality cement, which is proposed to consumers.
Let’s turn to history a little. The cement was patented in the nineteenth century, to be more precise, then in one thousand eight hundred and twenty -fourth years. And this happened under very interesting circumstances. One of the masons living in the city of Portland was engaged in the collection of road dust from the road, which passed along Mergel. The collected dust was fired. As a result of this, cement appeared. After some time, the same mason named Aspdin and patented his invention, thanks to which the whole world found out what cement is. At the present time, in Russia, the production of cement is carried out by several dozen largest factories. Any enterprise specializing in the production of this material, as a rule, boasts the presence of its own quarries of limestone and clay, or, at least, strives for this. This is due to the fact that possessing such quarries, the manufacturer gets the opportunity to constantly monitor the chemical composition of the shihta. And this is an important condition that helps to obtain a high -quality product.
Firing the shiht is impossible without special furnaces, the temperature in which reaches fourteen and a half thousand degrees. After firing, granular clinkers appear, the diameter of which is noticeably one hundred millimeters.
The next step is associated with the grounding of these same clinics. All this is carried out using special ball mills. It should be said that during this operation, a five percent double -water gypsum is added to the mixture.
