What is cement brand and how to define it?
The cement mark is indicated by the abbreviation PC or M. The abbreviation M400 will mean that it can withstand pressures up to 400 kg / cm³.The number of any additives will be displayed as the letter D and the specified percentage of these additives. For example, D10 - this means that contains 10% of additives. Of course, any additives affect the composition, strength and ductility.
There are also specific types of cement with individual properties. How to determine the brand of cement with special properties? Such material is marked with abbreviations:
- B - means its fast curing rate;
- PL - plasticized;
- SS - cement with sulphate-resistant properties;
- H - so-called, normalized cement( made on the basis of clinker);
Cement marking and its purpose can tell a lot about the features of its use, operation and durability. Let us examine the main varieties of this material.
Popular brand of cement
Cement grade M500 D20 is often applicable in industry, as well as in agricultural or residential production. Used in the manufacture of precast reinforced concrete and beams, laying foundation and slabs, etc., including used in the manufacture of concrete and mortar.
This brand of cement is suitable for masonry, plastering and similar types of repair and construction works. It is water resistant, frost-proof, has a high protection against corrosion, in contrast to ordinary portland cement.
Cement with marking M400 D0 is used to produce prefabricated concrete or reinforced concrete structures when the use of thermal treatment is necessary. In addition, it is applied to concrete or reinforced concrete overground, underground or underwater structures that are exposed to the action of fresh or mineralized water. This is a good brand for a variety of concrete, as well as mortar.
Cement brand M400 D20 is used both in industrial and agricultural production, and in housing construction. From it, prefabricated reinforced concrete, foundation, beams, slabs, wall panels, etc. are made. It has good frost resistance and water resistance.
Special types of cement
Cement designation as fast-setting says that this type is characterized by an intensive increase in its strength in the first stages of solidification. Basically, it is applicable for the production of structures and products from precast reinforced concrete. Special properties( high rate of solidification) are due to the microstructure of the clinker and mineralogical composition, fineness of grinding of the main component and dosage of additives.
Plasticized cement has a high plasticity and resistance to low temperatures of concrete and mortar. To obtain this brand, when the clinker milling process takes place, a plasticizing hydrophilic surfactant additive in volume of 0.15-0.3% of the total mass is introduced into it. Basically, products of processing for fodder yeast of sulfite liquor - SSB( sulphite-alcohol bard) are used.
Cement sulfate-resistant is a type of Portland cement. This brand of cement has properties of high resistance to the action of mineralized waters that contain sulfates, as well as less heat generation, low intensity of solidification and increased frost resistance.
This grade is obtained due to the finely divided clinker with the normalized mineralogical composition. It is used to make structures for hydraulic engineering or similar structures, which are affected by an aggressive sulfate environment, for example, seawater, especially under the condition of variable humidification, and also with a constant alternation of freezing and thawing.
Standardized cement is useful for all kinds of road surfaces, pressureless and pressure reinforced concrete pipes, sleepers, bridge structures. And also for the support racks of the high-voltage power transmission line, for contact networks of railway transport or lighting. It is necessary to supply the composition that is made on the basis of clinker with a normalized composition, which contains tricalcium aluminum by mass not more than 8%.
We hope that everything is clear, and there are no more questions left, which means the brand of cement, and also what is the marking according to the characteristics.