How to distinguish the quality of speed bumps? Speed bumps are very common in daily life, especially for car-family. When passing the speed bump, slow down and drive slowly, otherwise it will cause great damage to the car. What is a good speed bump? The standard of good or bad is what?
1. All parts of the speed bump should be firmly connected. The upper section of the speed bump should be trapezoidal or arc-shaped. Its width should be within the range of (2500 m ± 8 m) ~ (350 m ± 7 mm), and its height size should be within (30 m ± 7 mm). Within the range of m ± 5 mm)-(80 m ± 5 mm), the ratio of the height to the width of the rubber speed bump used on some roads should not be greater than 0.9.
2. The pressure resistance of the speed bump. A truck with a vehicle weight of 22 passes through the fixed rubber speed bump at a speed of 35 km/h. After the test, the rubber speed bump should not be damaged or cracked. Physical properties, elongation at break The elongation at break of the surface material of the rubber speed bump should not be less than 180%, and the elongation at break of the surface material of the rubber speed bump used on the road should not be less than 260%.
3. Tensile strength, the tensile strength of the surface material of the rubber speed bump should not be less than 5.0 MPa, the tensile strength of the surface material of the rubber speed bump used on the road should not be less than 9MPao tear strength, the tear strength of the surface material of the rubber speed bump Should not be less than 15 kN/m.
4. Wear loss, the wear loss of the surface material of the rubber speed bump should not be greater than 0.7 cm3/1.51 km. Impact elasticity, the impact elasticity of the surface material of the rubber speed bump should not be less than 30%. Retroreflective performance, rubber speed bump The retro-reflection performance in the direction of vehicle driving shall not be lower than the national requirements.