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How to choose "3D printing house" technology? Material and seismic resistance are two of the most important!
- Categories:Industry news
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- Time of issue:2020-02-23
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(Summary description)In recent years, with the continuous improvement of human cost, safety, environmental protection and other requirements, the disadvantages of "traditional construction method" in the construction indu
How to choose "3D printing house" technology? Material and seismic resistance are two of the most important!
(Summary description)In recent years, with the continuous improvement of human cost, safety, environmental protection and other requirements, the disadvantages of "traditional construction method" in the construction indu
- Categories:Industry news
- Author:
- Origin:
- Time of issue:2020-02-23
- Views:0
Information
In recent years, with the continuous improvement of human cost, safety, environmental protection and other requirements, the disadvantages of "traditional construction method" in the construction industry are increasingly apparent. Therefore, the "3D printing house" technology, which represents the future development of the industry, has become the focus of social attention.
Based on this, a variety of different concepts of "3D printing house" technology appeared one after another: there are printing the whole house, printing some parts of the house, printing single space. In terms of raw materials for printing, there are also many kinds of materials, such as ordinary grade cement, gypsum, mine waste and waste reprocessing Then, for the construction enterprises, how to choose the "3D printing house" technology that can meet the construction requirements and the relevant national construction specifications and standards? Next, the author analyzes from two dimensions.
The basic technology of "3D printing house" - printing raw materials!
"A huge spray head, like a cream mounted flower, continuously sprays out 'ink', and 'ink' stacks up the walls of the building..." This is the basic construction scene of "3D printing house" technology, and the "ink" is the raw material of the building.
(basic construction scene of "3D printing house" technology)
Recently, some media have revealed that a company claims to be able to print out a whole house within 24 hours. So, what are the printing materials for such a "quick build" building?
First of all, it can be determined that the buildings that can be printed in 24 hours will not use the "ordinary grade cement" generally recognized by all countries in the world! Because the initial setting time of ordinary cement is 180 minutes, that is, 3 hours, and the cement cannot be fully solidified within 24 hours.
Therefore, the building may only use the following materials: first, there is a good quick drying and a certain strength of "gypsum". However, the high water absorption of gypsum, easy to deteriorate and other shortcomings have a great impact on the structure of the house. Secondly, it is the "quick drying cement" which can stimulate the strength of cement through strong alkali. Although this kind of cement dries fast, it is very powdered in the later stage. In addition, it is all kinds of recycled materials such as mine tailings and construction waste. However, due to the uncertain composition of these materials, they have not been recognized by relevant national policies in terms of environmental protection and durability.
It can be seen that in order to print out the buildings that conform to the relevant construction specifications and standards in the existing national construction field, the most secure is our common "ordinary concrete" in terms of raw materials.
As we all know, "ordinary concrete" is composed of cement, water, sand and large particles of stone. However, due to the limitations of technology, the relevant enterprises in the field of "3D printing house" in the world can only use "small particle fine aggregate" as the printing raw material, that is, the gypsum and powder like recycled materials we mentioned above. At present, there is only one enterprise that can produce "big particle heavy aggregate concrete" with stones by using "ordinary grade reinforced concrete" as printing raw materials in the world. This enterprise is Beijing Huashang land and Sea Technology Co., Ltd. (referred to as "Huashang land and sea") from China.
The overall printing of the construction process, seismic higher!
As we all know, the key factor to measure whether the building can meet the standard is the seismic resistance, which is often called "whether it is solid". In the field of "3D printing house", there are two construction technologies, namely "overall printing" and "pre printing". Among them, the main process of prefabrication and printing is to assemble the beam, slab, column, wall and other building components in advance in the construction site like building blocks. With this technology, the threshold is low, and the combined Lego building has a great potential safety hazard in structural stability and seismic resistance.
In contrast, the buildings based on "3D overall printing" technology, because of its "integrated" stable structure, are even more "seismic" than the buildings built by traditional technology. However, due to its complex "process flow" and huge "equipment structure", the enterprises that can realize this technology in the world are rare. However, it is gratifying to note that "the only Chinese businessman in the world who realizes the printing of 'ordinary grade reinforced concrete' is a global leader in this field.".
In October 2018, Chinese merchants spent two months on land and sea, and successfully printed a "New Windsor Castle" with an area of more than 600 square meters. According to the relevant technical personnel of the enterprise, if the construction period of the building is at least 9 months according to the traditional construction process, and after using the 3D printing equipment of Chinese land and sea "direct pouring molding" technology, the actual construction period is shortened to just 2 months. At the same time of greatly shortening the construction cycle, in terms of labor and building materials, it also saves more than 60% compared with the traditional construction process. In the process of building acceptance, "New Windsor Castle" fully conforms to the existing national construction specifications and standards!
(the New Windsor Castle built by Chinese merchants on land and sea with "overall printing" technology)
It is understood that the equipment used for such a large building as a whole is the "gantry building 3D printer" independently developed by Chinese merchants on land and sea. This large-scale printing device can not only print "single house construction" such as bungalows and villas, but also print "multi house construction" and "infrastructure construction" such as high-rise apartments, large-scale commercial buildings and bridges.
In terms of cost, the customized price of a single Chinese land and sea "gantry building 3D printer" from hundreds of thousands to tens of millions of enterprises is acceptable to most construction enterprises. Based on the intelligent programming process, the threshold for construction workers to learn "3D building printing" technology has also dropped significantly, providing a larger space for the reserve of new technical talents in construction enterprises.
(the New Windsor Castle built by Chinese merchants on land and sea with "overall printing" technology)
It is understood that the equipment used for such a large building as a whole is the "gantry building 3D printer" independently developed by Chinese merchants on land and sea. This large-scale printing device can not only print "single house construction" such as bungalows and villas, but also print "multi house construction" and "infrastructure construction" such as high-rise apartments, large-scale commercial buildings and bridges.
In terms of cost, the customized price of a single Chinese land and sea "gantry building 3D printer" from hundreds of thousands to tens of millions of enterprises is acceptable to most construction enterprises. Based on the intelligent programming process, the threshold for construction workers to learn "3D building printing" technology has also dropped significantly, providing a larger space for the reserve of new technical talents in construction enterprises.
According to the analysis of relevant scholars in the field of construction, the concept of "vertical printing and horizontal use" of Chinese land and sea is the best current solution of "3D prefabricated building" in the world. Because, no matter a single bedroom, single living room or kitchen, each overall functional room can better compact the structural density through the "vertical printing" construction scene, so as to enhance the seismic resistance of the single building; then in the "horizontal use" use scene, to expand the stress area of the single building and enhance the stability of the overall building. In addition, it is worth noting that in the process of assembly, single functional buildings of several tons or even dozens of tons can be hoisted through four lifting points, so the super structural stability can only be realized with the unique technical advantages of "ordinary grade reinforced concrete" as the printing raw material of Chinese merchants on land and sea. Therefore, this kind of building, which can even be called "seismic shelter", is worthy of residents' trust.
To sum up, the author believes that for the direct beneficiary of "3D printing house" technology - construction enterprises, in the process of selecting suppliers of the technology, gimmicks such as "24 hours", "1000 yuan / m2 construction cost" should be shielded, and more information such as printing raw materials and seismic resistance of printing building structures should be learned. Because, whether based on legal constraints or corporate responsibility, the quality and compliance of construction are the most critical.
Accordingly, for the output side of "3D printing house" technology, we should start from the perspective of construction enterprises and residents, just like "Chinese merchants, land and sea", and print out the real "living" house through practical technology research and development and practice, which is a corporate responsibility and obligation. Such achievements can also bring rich market returns to the enterprise.
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Founded in 1989, Beijing Huashang Luhai Technology Co., Ltd. is located in Fuhao Industrial Development Zone, Tongzhou District, Beijing, covering an area of about 18000 square meters. Relying on the correct business strategy and scientific management of the enterprise,
Chinese merchants are growing and growing. They have achieved their goals year by year with a steady style. Since 2003, they have been appraised as
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