With the development of transportation, road construction has seen many technological advances. Many new pavements are very different from traditional pavements in terms of materials, structures, functions and forms, and are well prepared for the development of future transportation.
A road surface that can be moved around has been produced abroad. It is made of lightweight aluminum alloy. When people find that a certain section of road is damaged, vehicles can be used to transport the new road to the site in time as a temporary remedy. Pavement experts also use materials such as polypropylene to repair the road surface. After laying it on the damaged road section, the bottom surface melts and becomes tightly integrated with the original road surface, making it appear very strong. This type of pavement is extremely corrosion-resistant and has a long service life.
Generally, people always think that smooth and smooth roads are more "high-end". In fact, for driving vehicles, a patterned and slightly rough road is better. This is because it is especially important to prevent the road surface from slipping when the vehicle is traveling at high speeds. Therefore, when building roads, people used special road construction machinery to leave various patterns on the road surface. It is like anti-skid floor tiles. Cars are not easy to slip even when driving on rainy days, as if equipped with a "road safety" Safety belt". In addition, mixing rubber particles with cement and adding special chemical glue to pave the road can also have an anti-slip effect. Moreover, this kind of pavement has extremely high wear resistance and its strength is much higher than that of asphalt pavement.
What’s more interesting is that an engineer in the United States was inspired by the heavy pressure of cars on the road and installed a pedal-type rotating shaft under the road. The heavy pressure when the vehicle drives over the pedal can cause the rotating shaft to rotate, driving the connected generator to generate electricity. This electricity is used for road lighting, and it is more than enough!
In addition, people also According to different needs, a variety of new pavements such as colored pavements, luminous pavements, electronically controlled pavements, and waterproof pavements have been designed. I believe that before long, our transportation will be completely different.
Knowledge points
Magnetic levitation trains and environmental protection
The maglev train is a train driven by magnetic levitation force. Because the magnetic force of its track makes it float in the air, it does not need to touch the ground when walking, so its resistance is only the resistance of the air. The maximum speed of the maglev train can reach more than 500 kilometers per hour, which is faster than the more than 300 kilometers of the wheel-rail high-speed train. Research on maglev technology originated in Germany. As early as 1922, German engineer Hermann Kemper proposed the principle of electromagnetic levitation and applied for a patent for a maglev train in 1934. China's Shanghai Maglev Train is the world's first maglev train demonstration operation line.
Because the maglev train has no wheels, no friction and other factors, it saves 30% of electricity than the most advanced high-speed trains and produces very low noise. It is a very environmentally friendly mode of transportation.