Feeding system for 3D printing of ultra-high performance concrete

Abstract

The invention belongs to the technical field of 3D printing of ultra-high performance concrete. A feeding system for 3D printing of ultra-high performance concrete comprises a stirring tank, a vacuumizing unit, a main stirring unit, a feeding unit, a conveying pump and a 3D printer nozzle, wherein the stirring tank is of a sealed structure and is supported by a main body rack; the vacuumizing unit is connected to the top of the stirring tank and is used for vacuumizing the stirring tank; the main stirring unit is used for stirring materials in the stirring tank; the feeding unit is arranged at the top of the stirring tank and is used for feeding the materials into the stirring tank; the feeding end of the conveying pump is connected with the bottom of the stirring tank through a material receiving pipe; and the discharging end of the conveying pump is connected with the 3D printer nozzle. The feeding system is reasonable in structural design, environmentally friendly, efficient, high in intelligent degree and green degree and more suitable for 3D printing of ultra-high performance concrete (UHPC).

Description

technical field [0001] The invention belongs to the technical field of 3D printing ultra-high performance concrete, in particular to a feeding system for 3D printing ultra high performance concrete. Background technique [0002] With the rise of the fourth industrial revolution with artificial intelligence, new material technology and virtual reality as technological breakthroughs, intelligence and greening have become the goals of modern industry pursuit and development, improving resource and energy utilization and reducing pollution emissions , changing the way of life, flexible and changeable etc. are its essential characteristics. However, in the construction industry, 3D printing concrete technology, which is expected to adapt to the development of the fourth industrial revolution, is not yet mature, whether it is 3D printing concrete materials or complete sets of equipment that can meet the needs of intelligent and green printing construction. 3D printing has high re...

AI Technical Summary

Problems solved by technology

However, in the construction industry, the 3D printing concrete technology, which is expected to adapt to the development of the fourth industrial revolution, has not yet matured whether it is 3D printing concrete materials or complete sets of equipment that can meet the needs of intelligent and green printing construction.

3D printing has high requirements on the performance of concrete, and traditional concrete is difficult to adapt to, and existing theories cannot guide the design and construction of 3D printed concrete well.

This makes Ultra High Performance Concrete (UHPC) with high baseline strength and excellent durability an ideal choice for 3D printing concrete. In order to improve the homogeneity and remove the coarse aggregate, especially to improve the rheology, various admixtures such as thickener and water reducer are added. The total amount of gelling materials and the total amount of admixtures are The dosage is much higher than that of conventional concrete, which makes the mixture more viscous and poor in pumpability. The existing 3D printing concrete mixture supply system includes raw material storage, classification, feeding, mixing and transportation. It is difficult to meet the supply demand for ultra-high performance concrete mixture, and the degree of intelligence and greenness is low. Therefore, it is necessary to develop a mixture supply system that meets the needs of ultra-high performance concrete 3D printing.

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