Cement ПЦ 400 Д20: features, scope and storage

The most common hydraulic binder is Portland cement. It includes finely ground cement clinker with gypsum. The last component is added to adjust the setting time of the finished solution.

There are several varieties of Portland cement. To get them, regulate the mineralogical composition, introduce mineral additives. Each of them has its own properties, which affects the scope of the finished product.

The following types of cement are added to which mineral additives are introduced: 600, 550, 500, 400. The percentage of added substance is indicated in the marking D. For example, cement 400 20 means that it is Portland cement grade 400, which contains 20% of additives. Further - in more detail about this brand of material.

Features of cement brand 400

First of all, you need to figure out what the number 400 stands for. This is an indicator of weight pressure in kilograms per 1 cm². In other words, a test sample of cement PC 400 D20, cast from cement M400, was able to withstand the pressure of the indicated weight and did not crumble, but remained intact. By the way, concrete grades are determined in the named way: they make a prototype and test it in laboratory conditions using special equipment.

There are several varieties of cement brand 400. They differ in the amount of plasticizers - their quantity and features affect the properties of the finished solution and products from it:

1. The designation "D0" implies that the mixture does not contain any additives. The material has a general construction purpose and is used for the construction of moisture-resistant structures.
2. "D5" - the mixture contains 5% plasticizers. It is used for the manufacture of high density elements that can withstand high humidity and corrosion.
3. "D20" means that twenty percent of the cement is an additive. This brand has an important feature - in the initial period of solidification it quickly gains strength.

Why are supplements needed?

Thanks to the introduction of mineral additives, the following characteristics of cement 400 PCs d20 are significantly improved:

1. Corrosion Resistance
2. Water resistant.
3. Thermal performance.
4. High strength.
5. Operation of finished products and structures is allowed in any climatic zones.
6. Resistance to the influence of temperatures and their fluctuations.
7. Resistance to corrosion wear.

The disadvantages of the use of additives include the deterioration of the frost resistance of the substance. In addition, due to mineral substances, the cement mortar hardens longer than without them. But this all overlaps with the fact that the use of additives reduces the amount of expensive cement clinker, making a bag of cement significantly cheaper. And this despite the fact that the strength characteristics of Portland cement with additives remain the same as that of a material without additives.

Scope of application

Cement 400 20 is used for the preparation of cement mortars and mixtures of very many brands. It is also in demand by enterprises that produce reinforced concrete structures, slabs, beams, wall panels, floors and other types of products. The named material is indispensable, starting with laying the foundation and ending with the preparation of the stucco mortar:

1. When erecting low-rise housing buildings.
2. At the construction of agricultural facilities.
3. In industrial construction.

There is the only exception where it is not recommended to use cement PC 400 D20. These are structures that must have high frost resistance.

Material purchase: what you need to know

The quality of this type of material largely depends on storage conditions. Manufacturers recommend storing mixtures so that they do not get moisture. To do this, a separate dry room should be allocated. It is best if the material is laid on pallets otherwise the lower cement bag in each stack can become damp.

Therefore, when planning to buy material, first of all, you need to pay attention to how long it was manufactured: the longer the product lay, the more likely it is to get a poor-quality mixture in your hands - in just a month, if stored improperly, cement may lose 50% of its strength.

Which is very beneficial for consumers - you can buy bags of cement of 50 kg or 25. This allows you to buy exactly as much material as is necessary to solve a specific construction task and then do not ensure proper storage of residues.