• Nombre del producto: Rebar
  • ID del Producto: Rebar

China's steel consumption has obvious characteristics of the developing countries, and industrial construction steel consumption accounted for about 90% of the total consumption of steel construction steel in which the proportion is 50%. Because China is in the historical period of rapid development of urbanization, high demand for construction steel. Steel as the main construction steel consumption has been dominated by a large proportion of China's steel production.





There are two steel commonly used classification methods:
        
First, the geometry of the classification, according to the cross-sectional shape of the ribs and rib spacing or classify different type, such as British Standard (BS4449), the rebar type Ⅰ, Ⅱ type. This classification main reaction grip performance rebar.
        
Second, the performance classification (level), for example, our current performance standards, rebar (G B1499.2-2007) wire for the 1499.1-2008), press the intensity level (yield point / tensile strength) will be divided into rebar three grades; Japanese industrial standard (JI SG3112), press the overall performance will be divided into five types of steel; British standard (BS4461), and also provides a number of performance tests grade steel. But it can also be classified by the use of steel, such as into an ordinary steel reinforced concrete and prestressed concrete reinforced with steel and other heat treatment.



 


Rebar specifications

Rebar specifications shall be stated in the import and export trade contracts.
         
☆ general should include standard grades (Category code), reinforced nominal diameter, nominal weight (mass), of equal length and a predetermined tolerance values ​​of the above parameters.
         
☆ our standard recommended nominal diameter rebar 6,8,10,12,16,20,25,32,40,50mm series. Delivery length min length and double length of two kinds.
         
☆ China's exports of rebar length range of options for the 6 ~ 12m, Japanese rebar cut to length range of options for the 3.5 ~ 10m; when domestic sales rebar contract if no specified requirements, usually length of 9m, 12m two lengths

Production Process
        
Rebar surface ribbed steel, also known as ribbed steel bars, usually with two longitudinal ribs and evenly distributed along the length direction transverse ribs. Transverse rib shape helical, herringbone, crescent-shaped three kinds.
        
With a nominal diameter of a few millimeters. Well ribbed steel nominal diameter equivalent to the cross section such as round bar nominal diameter. Reinforced nominal diameter of 8-50 mm, recommended 8,12,16,20,25,32,40 mm in diameter. Ribbed bars in concrete main tensile stress.
        
Ribbed steel bars since the ribs role and concrete have greater bonding capacity, which can better withstand external forces. Ribbed steel is widely used in various building structures, especially for large, heavy, light, and thin-walled high-rise building structures.

Performance test

          1. Mechanical Properties
         (1) Performance indicators: assessment of the mechanical properties of the steel test items include tensile test (tensile strength, yield strength, elongation), bending test (anti-bending and bending once). Specific indicators listed in Table 6-7-7.
         (2) Test Method: ① tensile test method: commonly used standard test method GB / T228.1-2010, JISZ2201, JI SZ2241, ASTMA370, ГОСТ1497, BS18, etc; ② bending test method: commonly used standard test method GB / T232-88, YB / T5126-2003, JISZ2248, ASTME290, ГОСТ1401 9 and so on.
         (3) Bending Properties
         The table below provides the apex diameter bend 180 degrees, reinforced by the curved parts of the surface can not crack.
         4) reverse bending performance
         According to the requirements, it can be reinforced reverse bending performance test.
         Reverse bending test bending test apex diameter than the corresponding increase in a bar diameter. The first positive bent 90 degrees, 20 degrees after the reverse bending. After the reverse bending test, reinforced by the curved parts of the surface can not crack.

Properties and Uses

        Steel is widely used in civil engineering construction of houses, bridges, roads and the like. Great to highways, railways, bridges, culverts, tunnels, flood control, dams and other public facilities, small housing construction foundation, beams, columns, walls, slabs, steel structural materials are essential. With the degree of urbanization of our country deepening, infrastructure construction, real estate booming strong demand for rebar.









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