Cement-based composite for 3D (three dimensional) building printing and preparation method of cement-based composite

Abstract

The invention discloses an environment-friendly cement-based composite for 3D (three dimensional) building printing. The composite comprises the following raw materials by mass percentage: 25-35% of cement, 2-8% of a reinforced rheologic material, 40-60% of quartz sand, 0.02-0.2% of a mixture improving material, 0.1-0.2% of a water reducer, 8-14% of blended water, 0.05-0.1% of fiber and 0-5% of perlite. Building waste broken powder replaces part of the quartz sand; and the composite is directly conveyed into a 3D building printer for 3D building printer construction by on-site mixing and addition of an accelerator, a thickening rheologic agent and the like into a printing tail end. According to the composite, the building waste and industrial waste can be applied greatly; the composite islow in cost and environmentally friendly; the strength, cost and forming time of the composite can be flexibly controlled; the composite can be used for the 3D printing of common buildings and landscape buildings under different environment scenes and requirements, and meets the requirements on the efficiency under different building strength conditions; and the development, popularization and application of a 3D building printing technology are greatly promoted.

Description

technical field [0001] The invention relates to a cement-based composite material for building 3D printing and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] 3D printing technology is a technology based on digital model files, using bondable materials such as powdered metal or plastic, to construct objects by layer-by-layer printing; compared with traditional construction technology, 3D printing construction technology The advantages are reflected in: the speed can be more than 10 times faster than traditional construction technology; it can manufacture complex and diverse buildings that are difficult to build in traditional methods, and it does not need to use formwork, which reduces construction costs; it does not require a large number of construction workers, which reduces construction costs. safety risks; and reduce waste by-products, can effectively use building materials, greatly reduce the demand fo...

AI Technical Summary

Problems solved by technology

[0003] Due to the characteristics of the building itself, the building has specific requirements for the construction performance, mechanical properties, functionality, durability and economy of the materials used during the printing and manufacturing process and after the building is completed. As far as the current situation is concerned, cement Concrete is still the first choice for building buildings, but because the printed building adopts the construction method of no formwork, extrusion and overlay molding, higher requirements are placed on the performance of building materials, and traditional cement concrete is not suitable for 3D printing buildings. Material