Recently, the high temperature has continued in many places in China, and friends from Africa have said that they can't stand it, and the roads in many cities are hot and blooming.
Elevated pavement heats up "speed bumps"
Two days ago, a section of the road surface suddenly bulged on an elevated road section in Shanghai, causing passing vehicles to slow down and cause road congestion. According to the pictures of netizens, there was only a slight bulge on the road at first, but after a while, the bulge of the road surface was about 7 centimeters high and had become a speed bump.
After receiving the report, the viaduct road maintenance party adopted a sprinkler operation to cool the road surface, and arranged special personnel to inspect the road surface conditions uninterruptedly.
According to the response of the maintenance party, the main reason for the pavement arching is the continuous high temperature for several days, the reinforced concrete pavement layer of the bridge deck is heated and expanded, the steel bars in the pavement layer are heated and deformed, and the internal stress is released intensively, resulting in the arching of the pavement, which is generally called "temperature stress", which is commonly known as thermal expansion and cold contraction.
Keep an eye on road conditions and tires when driving in summer
In summer, the air temperature in many places can reach more than 38 degrees, and the ground can generally reach more than 50 degrees under the sun. High temperature is a test for people and vehicles, and it is also for the road surface. Whether it is a common asphalt or concrete road, the softening, deformation and cracking of the road surface and the reflection of light from the road surface caused by the high temperature in summer are far more severe than in other seasons.
In the case of an elevated road bulge like this one, we need to pay attention to the state of the vehicle in front of us when driving, and if we find that the car in front suddenly bounces abnormally, we should slow down in time. Those who have conditions can avoid it, and those who do not have conditions should pass slowly. If you do not slow down, there is a high risk that the bulge of the tire will break.
In addition, driving in summer due to the stronger sunlight will make the road reflection more serious, and driving for a long time actually has a great impact on the driver's eyes. Therefore, it is recommended that drivers can buy a pair of sunglasses suitable for driving, or directly paste a window film that meets the standards on the car.
Finally, when the temperature rises in summer, the cold tire pressure of the car will be about 0.1-0.3 bar higher than usual, and the hot tire pressure of the car will be about 0.2 bar higher after driving for a while. For this high pressure, we can reset the pressure so that it can maintain 2.5 bar or the standard tire pressure of the car model at cold tire pressure. Don't deflate blindly.
Write at the end
Every car will be tested for high temperature before leaving the factory, but it does not mean that the car will never be afraid of the effects of high temperature. The daily maintenance and driving habits of the car owner have a great impact on the condition and failure rate of the car.