Have you ever seen a 3D printed building? Construction waste turns to ink

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Recently, the largest 3D printed bridge in China and the first 3D printed bridge in Fujian province has settled in Baiqi Lake of Quanzhou, which has attracted a lot of attention.

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It took just over a month for the bridge to be formed in “one-step molding technology “advanced 3D printing technology.The net weight of the whole bridge is 12 tons, and it can bear 1000 kg pressure per square meter, which is not inferior to reinforced concrete.

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In fact, not only Bridges, but many buildings can be produced using 3D printing technology.A bus stop pavilion, garbage sorting room, landscape pavilion, park table and stool can be built in a short time with a 3D printer is better than use brick by brick to build.This is the result of nanjing Green Additive Intelligent Manufacturing Research Institute, located in Jiangbei New Area. By using 3D building printing technology, construction waste can be “transformed” into various buildings, and the construction can be basically automated.

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Nanjing green additive Intelligent Manufacturing Research Institute  is made in nanjing in 2019, the first sign of new research and development institutions, and southeast university “the Ministry of Education key laboratory of concrete and prestressed concrete structure” to build cooperative relationship, the new district in the north of the industrial technology research and park management committee, southeast university professor ya-mei zhang team and material nanjing jia wing digital technology research institute co., LTD., the three parties jointly establish.The institute specializes in the research, application and demonstration projects of new materials and green additive 3D building printing.

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Let’s walk into the 3D building production workshop of the Institute.Unlike the construction site, there are only a small number of boot personnel and repair personnel, the construction is basically automated. The structure and shape of various buildings here are generated by computer drawings numerical control program, which is realized by 3D building printer.

“We use computers to design three-dimensional building drawings, which are delivered to a digitally controlled large 3D building printer through the BIM management system. We print reinforcement assembly on site and build building components and bodies in line with the current specifications.”Zheng Gong of the institute said.

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The most surprising thing is that the “ink” for 3D printing buildings is actually construction waste.According to one statistic, China produces as much as 2 billion tons of construction waste every year due to the demand of urban construction.The promotion of 3D building printing technology can turn a large amount of construction waste into an important material for building a high-tech smart city, which will not only save the cost of urban construction, but also greatly reduce the environmental pollution caused by construction waste to the city.In addition, one of the advantages of 3D printing is additive manufacturing, which can accurately calculate the materials needed for building from design to printing. Therefore, there is no waste of building materials, so that they can be used accurately.

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What about the fastness of 3D printed buildings?How long does it last?”The strength of the component is 2-3 times that of the usual, and the bending resistance is 5-6 times that of the usual one, which is a new kind of composite insulation strong wall.”Zheng said that 3D printing is not only a new way of building, but also a subversion of the traditional building model, which is more durable, environmental protection, high efficiency and energy saving.

At the beginning of this year, the country’s first prefabricated 3D building printing intelligent bus platform was completed in the Research and Innovation Park of Jiangbei New District in Nanjing.The bus platform, shaped like a “portable player”, is equipped with such facilities and functions as query touch screen, vending machine and mobile phone charging station, which is full of the convenience of the future technological life.

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It can be predicted that with the development and popularization of 3D building printing technology, there will be more buildings built and put into use through printing in the future, and even the houses we live in daily may be built in this way.3D building printing technology is simple, fast and environmentally friendly, which will bring great convenience to human life!

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