Rebar is a metal product widely used in various fields of construction. It is a product of metal and steel, rarely non-ferrous metals, which is intended for use in reinforced concrete structures, for reinforcing concrete.
Fittings A500C: what is it?
There are many types of different fittings. In this article we will consider A500C fittings. This type of material (GOST 52544 2006) is an A5 brand rod with a diameter of 6-12 millimeters.
The letter A means that it is a hot-rolled reinforcement reinforced mechanically and thermally. The letter C indicates that this reinforcement is weldable. And the number 500 indicate the yield strength of the product.
Reinforcement 10 A500C theoretically weighs 0.617 kg. The average cost is 22,700 rubles per ton.
Armature 12 A500C has a bay weight of 0.888 kg. In a ton 1126.13 meters. The average price is 25,000 rubles. per ton.
Using
This type of reinforcement (GOST 52544 2006) is used to reinforce or reinforce the simplest reinforced concrete according to GOST 5781-81 or load-bearing structures according to GOST 10884-94.
Classification
Also, this building reinforcement is classified into distribution, installation and working. In addition, by the difference in strength characteristics there are non-tensile and tensile reinforcement. Depending on the profile, it is divided into reinforcement of a periodic profile (a2) and smooth (a1).
Sometimes reinforced reinforcement having the index T. is tried on.
Manufacture
Considering the question: "A500C fittings: what is it?" - It is impossible not to mention its production.
Most often, two methods are used to make this brand: hot-rolled and cold-drawn.
Using the hot-rolled method, the rod is produced, and cold-drawn allows the manufacture of wire and rolled reinforcement. It should be noted that the construction rod reinforcement has greater strength characteristics than other types.
It should also be noted that this class of reinforcement can be used at negative temperatures up to -55 degrees, in addition, the use of arc welding with tacks of arched joints is permissible.
Benefits
- A quantitative reduction in the consumption of reinforcement on the structure by increasing the design resistance to the loads.
- Profitability due to the low cost of thermomechanical processing.
- Unification - involves the replacement of all classes of goods 400, 300 and 240 with new fittings.
- Reliability, due to the lack of creating a nodding zone at the welding site, and excellent plastic properties.
disadvantages
- Possible errors during the construction of houses, when in structures that are designed for fittings A500C, accidentally used A400. Currently, they are trying to eliminate this by labeling. Previously, new fittings differed in profile, but different plants make notches on different products, which confuse consumers.
- Illiterate and improper handling, which becomes a real wrecking, long-term influence of elevated temperatures, can lead to tempering of steel, which may cause its mechanical properties to be lost.
- Reduced corrosion resistance, because during the manufacture of the reinforcement, heat treatment is carried out, after - a massive attack of water in order to quickly remove more heat. Therefore, there is no formation of a layer of scale, which protects against corrosion.
- Uneven mechanical characteristics along the length of the rod. More often this is characterized by domestic products, because outdated equipment and technologies are used. Similar problems are absent in European plants. In particular, this problem is perfectly solved at a Turkish metallurgical plant, equipped with European high-precision equipment, which allows achieving uniformity of mechanical properties throughout the core.
Cold-deformed fittings
A500C cold-deformed fittings - what is it? This type is made, as the name implies, by cold deformation. The method is often used for the manufacture of small diameter products (3-12 millimeters), but in some countries it is widely used in the construction process. The main problem of their manufacture is the presence of a finished wire rod with stable characteristics.
A visually similar type of reinforcement can be determined because it does not have a side rib and there are three or more profiles. Such products are quite effective in the factory and are used on automatic lines.
One of its common types is known as a welded mesh, in which there is no scale. That is why resistance welding can be used in its application. It is possible to weld structures even in shielding gases. The disadvantage of such products follows from its advantages: first of all, the reinforcement in the absence of scale rusts very quickly, and welding of such reinforcement using a conventional electrode is not allowed.
Rebar selection
Choosing cold-deformed fittings, you should definitely pay attention to the manufacturer, because its quality is influenced by many factors. It is for this reason that it is better to give preference to enterprises that produce their wire rod, for example, the Belarusian Metallurgical, Magnitogorsk Hardware and Metallurgical or Cherepovets Steel Rolling Plants. However, it is worth mentioning here that the concrete plant No. 18 was able to achieve the greatest success in ensuring the quality of goods.
So, we examined the question: "A500C fittings: what is it?" Do not forget about unscrupulous manufacturers. At this time, many manufacturers are deliberately hiding the abbreviation x / d in the designation A500C, which should be written at the bottom, indicating the method of production of the product. In general, the use of such reinforcement is very effective, because it is not inferior to hot-rolled steel in terms of characteristics and even surpasses it in many ways