Why can crayfish shells be used to build roads?

Eating crayfish seems to be a necessary sense of ritual every summer. In the 1990s, the consumption of crayfish in China was only 70,000 tons. With the rapid economic development in China, by 2065,438+09, the consumption has reached 2.459 million tons. But when eating crayfish, the discarded shells alone account for 50%-70%. Because crayfish shells contain protein, fat and other substances, it is easy to get high temperature.

What should I do with lobster shells? A researcher at Changsha University of Science and Technology in China got an inspiration while eating crayfish. This kind of shell may be used to build roads, because the lobster shell can still be intact after being treated at a high temperature of 200 degrees Celsius during cooking, so its high temperature performance is quite good. So, can it be added to asphalt to improve its high temperature performance?

According to this idea, the team started scientific research. Wash the crayfish shells with clear water, and bake them in the oven 140℃. After grinding shells into powder with a pulverizer, add them into ordinary asphalt, and then spread them on the road in a small area for experiments. The results show that crayfish shell powder can not only improve the rigidity of asphalt, but also improve the high temperature stability and creep resistance of asphalt, and even solve the problem of asphalt aging due to rain.

At present, the person in charge of the project claims to have applied for a national invention patent. In fact, crayfish shells have successfully entered the textile industry in addition to cross-border cooperation with the transportation industry. After the lobster shell is cleaned and calcium carbonate, fat, protein and astaxanthin are removed, a layer of white shrimp shell, namely chitin, will remain.

A team in Wuhan once did an experiment. Chitin 1 ton can be extracted from every 25 tons of crayfish shells. After dissolving, filtering and defoaming, this chitin can be made into fiber yarn, which can be further spun. This kind of filament is very thin, about one-third of that of ordinary hair, and the weight of 10,000-meter filament is only about1.5g.. In addition, this kind of fiber filament

20 1 1 year, when Tiangong-1 and Shenzhou-8 were launched, products made of this fiber were used, such as soft water tank outer bags, freight bags and other equipment of the space station. In addition, chitin has many physiological regulating functions, which can effectively inhibit the metastasis of cancer cells and improve human immunity. At present, it is widely used in food, medical insurance, health care and other fields.

Qianjiang City, Hubei Province, as the "hometown of crayfish in China", produces a large number of discarded shrimp shells every year. Therefore, it took local industries 5~ 10 years to build a chitin deep processing industrial cluster of 22 billion yuan, which realized the transformation of crayfish industry from traditional agricultural product processing to biotechnology high-tech industry, which not only turned waste into treasure, but also provided environmental protection solutions, which was a win-win situation.