In recent years, the number of domestic car ownership is improving along with the living standards of the masses, and this has created a question, that is, how to deal with the discarded tires removed from the car? The United States, which encountered this problem earlier, used it to pave the road, making the road surface have the characteristics of environmental protection and low noise, but after referring to the experience of the United States, China's approach is higher, what are the benefits of the United States paving the road with discarded tires? Why is China's disposal of waste tires higher? Tires are a kind of vehicle or mechanical assembly of ground rolling toroidal elastic rubber products, often used in complex and harsh conditions.
The picture shows the scrapped tires of the car in order to be strong and durable, usually using natural rubber, synthetic rubber, steel cord, cord cloth and carbon black and other raw materials, but after being abandoned, the solidity of these tires has become a headache problem, ordinary landfill methods are difficult to let these tires be naturally degraded, and once the tires piled together are ignited, not only will fire but also produce huge pollution to the environment, California, the United States in 1999 has happened together. The large-scale fire caused by the accumulation of discarded tires and ignition, the smoke drifted to a height of 600 meters, causing "black rain" in the surrounding cities, which showed its harm.
In order to carry out waste utilization, the United States chose to put these discarded tires into the construction of civil engineering, specifically for the construction of roads, as long as the sides of the tires are cut off, neatly discharged on the ground where the road is about to be paved, and then filled with gravel and asphalt inside, the entire construction process can be completed, on the whole, the operation process is still very simple, and the road built with tires is stronger than the road surface built purely with gravel and asphalt. This is because the tires below can play a role in having a certain elastic skeleton, when the large vehicle is rolled over, on the one hand, it can support the road surface, on the other hand, it can be slightly deformed under pressure, so that the entire road surface has a certain elasticity, thereby prolonging the overall service life, and these tires can occupy some of the space that was originally to be placed in concrete, so it can save about 30% to 50% of the road construction costs.
The figure for the Chinese highway laying this way also has its inherent shortcomings, the first is that it can only be used to build some ordinary roads with low load, if this method is used on the highway, it will lose its original effect, the second point is that it cannot be applied to some highways that need to be rebuilt frequently, if the construction personnel dig up the road surface in order to bury a pipeline, then the entire road surface will lose its effect because the structure is destroyed. It is precisely because of seeing such defects that China uses a more sophisticated method when dealing with waste tires, in short, the method used in China is to grind it into powder and mix it with asphalt to form rubber asphalt, and then use it to pave the road, so that the road surface can have better performance in terms of pressure resistance, frost resistance and wear resistance, not only for building highways, but also for repairing the runway of the airport.
The picture shows carbon black in addition to infrastructure construction, China has also developed other waste tire treatment methods, such as the waste tire after being crushed, the use of cracking furnace incineration, can be separated from cracking oil and carbon black, and then these raw materials can be used for the manufacture of new tires, in addition to cracking oil can also be used as vehicle fuel, it can be said that in the face of China's strong scientific research strength and industrial base, in the past was called black pollution of waste tires, It is gradually becoming an important resource in another form.