Construction reinforcement - characteristics, requirements, application

The products of metal rolling are increasingly in demand in modern construction, and varietal reinforcement, which increases concrete at times, is no exception. After all, reinforced concrete products are widely used in the construction of both industrial facilities and housing buildings.

Content:

1. The process of production of reinforcement
2. Construction reinforcement: technical characteristics and marking
3. The scope of application
4. Construction reinforcement requirements
5. Types of construction reinforcement
6. Composite construction reinforcement

The process of production of reinforcement

Reinforcement material, the manufacture of which takes place in the conditions of production by hot rental. Steel after arrival at the plant is shipped, and then filed in the workpiece department. The scrap metal undergoes thorough sorting and is placed on melting to a liquid state. Further, liquid steel is poured into molds. After hardening steel ingots, they are heated, compressed and rental. Then the products cool down on refrigerators, undergoes quality control, is cut and prepared for transportation. The consumer can buy construction reinforcement in the rods or skeins (depending on the type).

Construction reinforcement: technical characteristicsand marking

In the process of erecting reinforced concrete structures, flexible steel reinforcement of the rod is more often used. If there is a need to create stiffer structures, then slavelers, corners and double as are used.

Construction reinforcement GOST 5781-8222 rod. The surface of the product can be smooth or corrugated, which affects the marking. Smooth reinforcement (A-I) on the profile of the rifting rod does not. The reinforcement of the periodic profile is slightly different. Products of the class A-II, A-III and A-IV, A-V and A-VI have protrusions in the form of the screw, the corrugation passes at a certain angle, evenly overwhelming the profile in three entry. But the differences in the products of classes I-VI are not reduced only to external signs. The difference in their physical and mechanical properties (strength, type of steel) is indicated by letters. So, T indicates that in the manufacture of the product, thermally hardened steel was used, K - the material has increased resistance to corrosion, C - the product can be welded, in - stronger due to extract.

The reinforcement according to GOST 10884-81 (94) includes thermomechanical and total hardened steel rods with a periodic profile, the diameter of which is 6-40 mm. Such materials are used for the construction of devastated yellow -concrete structures.

The reinforcement of the new class is A500C. When working with this type of reinforcement, you can use arc welding. It is released according to the CTO standard ACCM 7 93. Such reinforcement is durable, plastic, and low cost. It can be used as for the installation of the foundation, floor slabs and for other purposes.

The scope of application

The fact that the object, fraught using the technology of monolithic concreting, is much stronger than other structures is no doubt about anyone. The appearance of the building does not suffer from this, rather, on the contrary, the wear resistance of the surface increases significantly. After all, the reinforcement, in fact, is a frame that holds concrete, since it reliably adheres to it thanks to a corrugated profile.

Dams, airport buildings, dams, bridges all these structures are being built using metal products. No matter what scope of construction we look into, everywhere construction reinforcement is more than in demand. The strength of the constructed structures depends on it.

Construction reinforcement requirements

The reinforcement is used as the basis of building structures that require an increased level of safety. Therefore, the characteristics and quality of metal rolling products should be extremely high.

Construction reinforcement must meet the following criteria:

• maximum hinge;
• strength;
• the consumption of GOST for more rigid adhesion to concrete;
• corrosion resistance.

Types of construction reinforcement

Depending on the future location in the frame, the reinforcement may be transverse or longitudinal. The transverse is used to protect the structure from the occurrence of cracks near the supports, as well as to improve the bunch of concrete. The longitudinal prevents the formation of vertical stresses and takes on part of the loads of concrete.

Construction reinforcement (the weight of the linear meter ranges from 2.22 kg to 39.46 kg and depends on the thickness and length of the profile) there are such types:

• clamps;
• mounting;

• working;
• distribution.

Working The Army accepts stretching efforts that arise as a result of influence on the construction of external loads, as well as its own weight. Installation Designed for the formation of the frame and fixing the working rods. The distribution armist divides the load between all the rods, preventing them from moving and deflection. Clampsprotect concrete from cracking the surface near the fasteners. If the frame must be placed in beams or crossbars, then used double steel rods.

On the principle of connection with concrete, reinforcement can be tense and unnecessary. Depending on the method of formation, it occurs cable, rod and wire Armature.

According to the method of installation, the reinforcement is divided into welding and knitted in the form of a grid or frame. Welding army is sometimes also called piece. It is used for small volumes of work. When erecting large -scale structures, the frame should be flexible, as the pros say. Otherwise, the building can be destroyed even with slight landslide or in the case of minimal movements of the earth's surface. That is why the frame is more often knitted.

The reinforcing mesh consists of rods that are fixed at the intersection of welding or viscous. The frames collected from rods and connecting lattices are called flat. Spatial frames are another variety of reinforced structures. They are made up of several flat nets or bags.

Depending on what material was made of, construction reinforcement is divided into steel and composite.

Composite construction reinforcement

Recently, composite products act as an alternative to metal rolling. This material has a number of advantages. Composite products are much stronger than construction reinforcement, the price is less. Destability to corrosion also significantly improves the physical and mechanical characteristics of this material.

Composite products, or rather rods or cables, consist of glass, basalt or carbon fibers and are saturated with polymer binding. The surface of the rods has ribs located parallel to each other or in a spiral. The reinforcement of glass fibers is called fiberglass, basalt basaltoplastic, and from carbon fibers, respectively, carbon fiber.

Composite fiberglass reinforcement has a surface corrugated in a spiral. An indisputable plus of this material in a combination of extreme strength and relatively small weight. Products from basalt fibers with longitudinal corruption have increased fire resistance and heat resistance. The rods and cables from carbon fibers are also distinguished by outstanding strength. About 12 thousand fibers soldered by polymers go to the manufacture of one cable.

Composite reinforcement in the building materials market appeared not for so long. It is used in the process of restoration of concrete structures and brick structures, as well as in the construction of road surfaces (strengthening slopes, for mixed coatings, including several paintings). Such reinforcement is in demand in the winter, when there is a need to introduce various mixtures into concrete to force the solidification process. After all, accelerators have a negative effect on steel structures, lead to their corrosion, while the effects of chemicals on composite products are minimized.

It is worth noting that some of the latest composite materials are under development, their properties are only studied. How durable they are, time will tell. In the meantime, in our country to strengthen concrete, mainly products from steel are used. Pillars, borders, columns, staircases and cells - structures, to create a frame of which are used reinforcement, and they are found in the daily life of each of us much more often than we can assume.