Today, the main building material is cement.. When mixed with water, it turns into a plastic mass.. This mass after a certain time hardens and becomes solid., like a stone. Cement is used in the manufacture of various concretes., eg, cellular and dense. Also applicable to various mortars.
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Several types of cement are currently produced. All of them differ in, that the composition is dominated by any substance:
- Portland cement is produced on the basis of alit. It is mainly used in construction.;
- Aluminum phases predominate in aluminous cement;
- Magnesia cement is produced on the basis of magnesite. It is mixed with an aqueous saline solution;
- Mixed cement contains all of the above types;
- Sodium hydrosilicate is the basis for acid-resistant cement;
- Belit prevails in Romancement. It is currently discontinued.
Primarily, when talking about cement, they mean portland cement. It has a valuable. This powdery material, when mixed with water, can also harden in air., and in the water. This makes it possible not to suspend construction work in rainy and inclement weather..
Also, cement is not divided by composition, and in terms of strength. Marks determine its strength. The most durable cement brand M600. It is used in the construction of bunkers, missile silos. All brands below M300 are not produced today. And recently you can find especially durable cement M800.
Food conditions
Cement can be stored for a maximum of one month, otherwise it loses its strength properties. If you store it for more 3 months, then he can lose about 1/5 its activity. After six months, the strength is reduced by half. This is due to the fact, that there is moisture in the air, and it is absorbed into the powder material. This results in premature hydration..
To prevent cement from losing its strength properties, it must be stored and transported in closed containers.
Transportation
Most often used for transporting cement rail transportation. This method of transportation is reliable and economical. You can get acquainted with the rates and the tariff system of payment, by following the link http://ptcom.kz/services/payment_railway_tariffs
When transporting by rail, all storage conditions for bulk materials are taken into account. They are transported in special bunker cars - hopper. The body of this car looks like a funnel, into which bulk substance is called. There are hatches at the bottom, thanks to which, the substance easily spills out of the car.
