Cement is an astringent inorganic substance inas a dry powder, which forms a plastic solution when interacting with water, which after a while passes into a solid state as a result of the physicochemical process. This material is able to solidify and maintain its strength in both water and air.
Cement brand m400
M400 - cement made from gypsum, fine clinker milling and specialized additives. The figure 400 indicates that after solidification the mixture is capable of withstanding loads up to 400 kg / cm.
This building material is produced inaccording to technical standards, and the quality of the finished product is strictly controlled, since the concrete structures in which cement enters must have high levels of stability and reliability.
Characteristic
M400 - cement with high strength,frost resistance, water resistance, durability and anti-corrosion properties. This is perhaps the most popular brand for household and industrial construction. It can be used as an astringent basis in mortar or concrete, and also used in the construction of reinforced concrete structures, since strength is quite suitable for such buildings. This material was deservedly recognized by European and Russian builders.
Advantages and disadvantages
M400 - cement, endowed with a number of advantages:
- The presence of high strength characteristics.
- Resistance to moisture, temperature extremes and corrosive wear.
- Long service life of reinforced concrete structures.
- The ability to use in any climatic zones, without introducing anti-freeze additives. So, M400 - cement, which is able to perfectly tolerate even critical temperatures.
- Wide range of applications. It can be used for plastering and masonry, erection of foundations, etc.
- Another important advantage is the absence of cracks even in the event of a deviation from the technology.
- In addition, the M400 is much cheaper than higher brands, which saves the budget.
The only drawback of the M400 is its strength. It is not suitable for building high-rise buildings. In all the rest, this cement brand only wins.
Marking
Marking "M400" means that the strengthof this material for compression is 400 kG / cm². It also reflects the presence of plasticizers in the cement. The additives increase the anticorrosion characteristics and water resistance of the mixture, which allows it to be used for the production of high density concrete, capable of operating under conditions of corrosive environment or humidity. The percentage of additives can reach up to 20%. This designation is applied to bags after the letter "D".
Application
As a rule, the features and amount of additives directly affect the area of application of cement. For example:
- D0 is Portland cement without additives.It has a general construction purpose and is used to prepare a standard mortar. Of such cement, most of the concrete structures used in high humidity conditions are made.
- D5 - is used for the production of high-density bearing elements, for example, foundation blocks, slabs. Such cement is distinguished by its corrosion resistance and greater hydrophobicity.
- Д20 –применяют в производстве железобетонных products (curbs, blocks of prefabricated foundations, paving slabs). This Portland cement is characterized by a fast set of strength at the beginning of hardening. Concrete, made on the basis of D20, sets itself after 12 hours.
Cement M400 (50 kg): price
The price of the material described can not be calledhigh, and it depends on the type, type, properties and volume of the ordered batch. To find out the cost of a bag of cement M400, you need to divide the price of 1 ton by the number of bags per 1 ton, that is, by 40.
Each consumer, of course, is interested in acquiring materials at a more favorable price - cheaper. So what influences the price in our case? Let's see:
- The presence of mineral additives significantlycheapens portland cement, since its percentage in the mixture varies. Thus, cement M400 with a high percentage of slag content will be cheaper than without additives.
- Plasticizers, on the contrary, increase its price.
- Another factor is the fineness of the grind: the better the clinker granules are crushed in the production, the more active the mixture, and, correspondingly, the higher the cost.
- The cost of kg of cement M400 is necessarily influenced by the manufacturer. Since they are all located in different parts of the country, the transport costs for them are also different.
- The price is also affected by packaging, because sellingthis material in bulk or put up in bags of 25 kg or 50 kg is a completely different thing, since the costs for the bags themselves, the charge for packing, etc. will be taken into account.
Cement M400 (bag) on average costs 190-225 rubles.
Recommendations before purchase
Buying the described material, it is best to chooseportland cement, which is packaged. Despite the fact that the difference in price will be about 20%, you will be assured of its "age" and quality. The fact is that the shelf life of cement is small - only 6 months, and eventually it gradually begins to lose its qualities, and the brand goes down.
Date of production of prepackaged materialapplied directly to the bag. When buying the same by weight, you have to believe the seller's word. Storage conditions are also important, since when the moisture in the cement gets into it, an irreversible process of hydration begins. Protecting sealed bags from moisture is much easier than a rolled up mound. To use the old, packed cement is economically unprofitable.
