Concrete based on 3D printing, preparation method thereof and 3D printing column template

Abstract

The invention discloses concrete based on 3D printing, a preparation method thereof and a 3D printing column template, and relates to the field of constructional engineering, and the concrete is prepared from the following raw materials in parts by mass: 80-120 parts of ordinary Portland cement; 10-15 parts of silica fume; 4-7 parts of quick-setting and quick-hardening sulphoaluminate cement; 60-85 parts of quartz sand; 30-50 parts of water; 1-2 parts of a water reducing agent; 1-2 parts of an expanding agent; 0.4-0.6 part of a defoaming agent; 0.02-0.04 part of an air entraining agent; and 0.04-0.06 part of cellulose and the like. The method comprises the following steps: weighing the raw materials; uniformly mixing raw materials such as polyvinyl alcohol fiber and ordinary Portland cement to obtain a dry powder mixture; uniformly mixing the water and the water reducing agent, adding the mixture into the dry powder mixture, uniformly stirring, and discharging. The column template is formed by printing the concrete. The printing effect is good, the printed component has good compression resistance and bending resistance, the cracking rate is low, and application and popularization are easy.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to 3D printing-based concrete, a preparation method thereof, and a 3D printing column formwork. Background technique [0002] In recent years, 3D printing technology has made great breakthroughs in the construction field with its advantages of fast manufacturing process, no template cost, low labor output and high degree of freedom release. For example, the emergence of 3D printed concrete buildings, bridges and components. However, as an innovative and unconventional technology, 3D printing concrete technology is difficult to turn to practice due to the obstacles of existing standards and regulations. [0003] For 3D printing, the mix ratio of materials is not only a key point, but also a difficult point. It is necessary to meet the extrudability to ensure that the material can pass through the printing pipe and nozzle smoothly, and to meet the buildability to avoid the pr...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to provide a concrete based on 3D printing and its preparation method, 3D printing column formwork, so that the printed components have good Excellent compressive and bending properties, and at the same time, it can also solve the shortcomings of the existing technology, such as easy blockage, high cracking rate of samples, unsuitable printing of fine samples, high labor costs, and waste of materials.

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