A brief description
It is often used in bridges, dams, highways and buildings. Common material property tests include tensile test, bending test and hardness test. The results of these tests are used to ensure that these products meet the specified characteristics of the material and meet the classification requirements.

details
Reinforcement mechanical properties testing
Concrete usually has higher compressive (push) strength, while tensile (tensile) strength is generally weaker. Therefore, steel bars are formed and embedded in concrete to enhance its tensile strength. Most steel bars are threaded steel bars, and threads are formed during the production process to enhance its adhesion to concrete. It is often used in bridges, dams, highways and buildings. Common material property tests include tensile test, bending test and hardness test. The results of these tests are used to ensure that these products meet the specified characteristics of the material and meet the classification requirements.

bending
The steel bars are bent into different shapes to enhance the strength of the concrete structure. In order to prove that the material can be bent without obvious strength loss, the three-point bending test can be used as a quality control inspection method to ensure the formability of the bar. This test usually requires bending the sample at a 90-degree or 180-degree angle along the bend center, and seeing if there are cracks on its surface. International standards stipulate the relevant requirements of the support roller diameter, bending angle and supporting span.

solution
A series of steel bending jigs are provided. These bending jigs are equipped with adjustable support spans and replaceable bending centers, so that a single jig can be used to test multiple sizes of steel bars. The bending fixture can be installed on any standard universal material testing machine and produced according to international standards. The Instron testing machine for tensile testing of complex steel bars can also perform simple bending tests.

Stretch
Reinforcing steel samples often undergo violent fracture (with a large recoil) when subjected to high loads. Such accidents can cause problems for vulnerable testing machines. In addition, because the teeth of the clamping surface are initially clamped at the protrusion of the sample, it is difficult to clamp the irregular steel surface. There is no matching fixture surface, the sample is easy to slide out of the clamp surface. When strain data is required for yield and modulus characteristics, specimen slippage will greatly affect test results and pass / fail test criteria. The irregular surface of the reinforcement also increases the difficulty of obtaining continuous and accurate strain data. Unlike the processed specimens, due to the irregular surface of the reinforcement, it is necessary to extend the gauge length (elongation strain is averaged over the long gauge length) for testing.
Solution A series of standard large-load single-test space and double-test space testing machines used a variety of different beams and fixtures in the design, providing a user-friendly solution for testing heavy and large-scale steel samples. A series of V-groove clamping is specially provided for steel bar testing.