How does 3D printing help the technical development of concrete? 3D printing technology is a great opportunity for the development of concrete industry, and 3D printing concrete technology has become an important direction for the development of concrete industry.China has a great advantage in this respect. Next, I will introduce the development status and latest progress of 3D printing concrete technology and its materials, construction at home and abroad, and the existing technical problems of 3D printing concrete technology. Finally, I will look forward to the future of 3D printing concrete technology and put forward possible research directions. Concrete material is one of the most important civil engineering materials in today's society. It has made immeasurable contributions to the development and construction of human society. With the development of social science technology, the problems of high energy consumption and high pollution of concrete in the process of production and application have gradually become prominent, which has become a major obstacle to the development of concrete materials.In order to meet the needs of sustainable development of society, the performance of concrete itself is gradually developing towards high strength and high performance. At the same time, the emergence of new technologies also provides a new direction for the sustainable development of concrete. In recent years, as the landmark technology of the third industrial revolution, 3D printing technology has led the trend of the times and entered various research fields rapidly. From industrial design, aerospace to medical treatment and other fields, 3D printing has already appeared, which will have a huge impact on traditional social production and become a creative technology to change the future world.Similarly, 3D printing concrete technology combined with concrete technology will be a major turning point in the development of concrete.Based on 3D printing technology, Edim will introduce the development status of 3D printing concrete technology and its contribution to the construction industry. Combining with the understanding and existing problems of 3D printing concrete technology, the future prospects and research trends of 3D printing concrete technology are forecasted. 3D printing concrete technology is a new technology applied to concrete construction based on 3D printing technology. Its main working principle is that the concrete paste is printed by nozzle extrusion under the control of three-dimensional software through extrusion device. Finally, the technology of 3D printing concrete for concrete component is obtained.In the printing process, there is no need to support the formwork in the traditional concrete forming process, which is the latest concrete formless forming technology.In 2012, researchers at the University of Loughborough developed a new type of 3D printing technology for concrete. Under the control of computer software, the 3D printing machine uses cement-based paste material with highly controllable extrusion properties to print accurately the holes in concrete slabs and walls, realizes the design and manufacture of super-complex large-scale building components, and makes them special-shaped concrete.The building opened a door. 1.3D Printing Concrete With the advent of 3D printing concrete technology, ordinary concrete has been unable to meet its technical needs. Further requirements for concrete performance are put forward, which are embodied in the construction performance of fresh concrete and the mechanical properties and durability of hardened concrete. T. Le et al. of Loughborough University, UK, have carried out relevant research.For fresh concrete paste, in order to meet the requirements of 3D printing, it must meet the specific performance requirements.First of all, extrudability. In the technology of 3D printing concrete, concrete paste is printed through the nozzle at the front end of the extrusion device. Therefore, the size of the particles in the paste is determined by the size of the nozzle, and the size of the particles in the paste should be strictly controlled to prevent the appearance of large aggregates from blocking in the printing process, so as to ensure the smooth extrusion of the paste. Secondly, concrete paste should have good cohesiveness. On the one hand, better cohesiveness can ensure that concrete will not be interrupted in the process of extrusion through noz

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