Speed ​​bumps are very common in daily life, especially those with cars. When passing the speed bump, slow down, otherwise it will cause great damage to the car. What is a good speed bump? What is the standard of good or bad? Today, Wei came to the fellowship to tell everyone.
1. All parts of the speed bump are firmly connected. The cross section of the speed bump should be trapezoidal or arc. The width dimension should be in the range of (2500mm±8mm)~(350mm±7mm), and the height dimension should be in the range of (30mm±5mm)-(80mm±5mm). The height and width dimensions of rubber speed bumps used on some roads The ratio should not be greater than 0.9.
2. Pressure resistance of cast steel speed bumps. A truck with a total weight of 22t passes through the fixed rubber speed bumps at a speed of 35km/h. After the test, the rubber speed bumps should not be damaged or cracked. Physical properties, elongation at break. The elongation at break of the surface material of the rubber speed belt should not be less than 180%, and the elongation at break of the surface material of the rubber speed belt used on the road should not be less than 260%.
3. Tensile strength, the tensile strength of the surface material of the rubber speed belt should not be less than 5.0 MPa, and the tensile strength of the surface material of the rubber speed belt used on the road should not be less than 9 MPa. Tear strength, the tear strength of the surface material of the rubber speed bump should not be less than 15kN/m.
4. Abrasion reduction, the abrasion reduction of the surface material of the rubber speed belt should not be greater than 0.7cm3/1.51km. Impact elasticity, the impact elasticity of the surface material of the rubber speed belt should not be less than 30%. The retroreflective performance, the retroreflective performance of the rubber speed bump on the direction of the vehicle should not be lower than the national requirements.
5. Adaptability. After the cast steel speed bump is subjected to various weather and environmental tests, the rubber speed bump should be free of discoloration, cracks, peeling, warping, etc., and its elongation at break and tensile strength should still meet the requirements of 4. After the rubber deceleration ridge is wiped by No. 0 diesel, there should be no obvious traces of dissolution and damage.

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