Today I will tell you about the knowledge of roads. We all know that bitumen is generally used for paving roads. Many people will wonder why cement is not used? They must have their reasons for using it this way. Do you want to know the reason? Today, the editor will answer it for you.
First of all, we know that bitumen is a very smelly thing, very pungent. But when there are potholes on the road, workers will use bitumen to fill it.
Why is this? What is bitumen made of?

In fact, bitumen is the remaining product of petroleum refining. High-quality oil is used as industrial oil, and the rest is used to pave roads.
People choose bitumen to pave roads because first: bitumen has good flatness, driving is stable and comfortable, low noise, and it is not easy to slip on the road; second: bitumen has good stability; third: bitumen construction is fast and maintenance is more convenient; fourth: bitumen pavement drains quickly; fifth: bitumen paving roads do not disturb people and many other advantages. Cement is a rigid ground, it must have joints, the construction is more difficult, and the thermal expansion and contraction in the four seasons are also prone to cracks.
Of course, bitumen also has disadvantages. Bitumen absorbs heat. When the sun is too strong in summer, the bitumen will melt a little, causing the tires of the moving cars to be stuck with bitumen that cannot be washed off. This is really a headache for the driver. So we often hear abuse from the driver.
Many people also ask, is bitumen toxic? The editor here reminds everyone that bitumen is very toxic and seriously threatens people's health. In serious cases, it will also affect people's fertility.
So, here, we should pay tribute to those workers! They are paying for us with their lives. Without their selfless dedication, there would be no such comfortable Sunshine Avenue as we have today. So we should also cherish our today.
Well, I have said so much today, and it is also to let people know some little knowledge. If you have any other opinions or different opinions from me, please leave a message on the message board! Update some little common sense every day to benefit many people. Today's explanation ends here, see you next time!