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Method for blending commercial concrete into 3D printing concrete on site

A commercial concrete and 3D printing technology, which is applied in the fields of manufacturing tools, sustainable waste treatment, solid waste management, etc., to achieve the effect of simple preparation process and easy industrial production

Active Publication Date: 2020-06-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the existing technology, the present invention can not only meet the different requirements of 3D printing concrete on the working performance before and after extrusion, solve the production and transportation problems of 3D printing concrete, but also avoid the problems caused by the mass production of 3D printing concrete. On-site raw material stacking and environmental protection issues, and the process is simple, which is conducive to promoting the mass application of 3D printed concrete, which has practical engineering significance

Method used

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  • Method for blending commercial concrete into 3D printing concrete on site
  • Method for blending commercial concrete into 3D printing concrete on site

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Experimental program
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Effect test

Embodiment 1

[0059] A method for preparing 3D printed concrete by deploying commercial concrete on site, comprising the following steps:

[0060] Step 1, preparing commercial concrete, said commercial concrete, in parts by weight, includes the following components: 120 parts of gravel, 150 parts of river sand, 23.6 parts of recycled coarse aggregate, 99 parts of cement, 17.8 parts of active admixture, 0.5 parts of fiber, 0.36 parts of water reducer and 40 parts of water.

[0061] Among them, the particle size of natural crushed stone is 5-15mm, the particle size of river sand is 0.15-4.75mm, and the fineness modulus is 2.2. The recycled coarse aggregate is broken into particles with a particle size of 5-15mm from construction waste. 3%-8%, the cement is P.O 42.5 ordinary Portland cement, the active admixture is silica fume, the fiber is polyethylene fiber, including 5-20mm and other lengths, and the water reducer is polycarboxylate water reducer , the water is tap water.

[0062] Step 2:...

Embodiment 2

[0068] A method for preparing 3D printed concrete by deploying commercial concrete on site, comprising the following steps:

[0069] Step 1, preparing commercial concrete, said commercial concrete, in parts by weight, includes the following components: 100 parts of gravel, 108 parts of river sand, 27.5 parts of recycled coarse aggregate, 64.5 parts of cement, 27.75 parts of active admixture, 0.8 parts of fiber, 0.55 parts of water reducer and 32.3 parts of water.

[0070] Among them, the particle size of crushed stone is 5-15mm, the particle size of river sand is 0.15-4.75mm, and the fineness modulus is 1.8. The recycled coarse aggregate is broken into particles with a particle size of 5-15mm from construction waste. The water absorption rate of the material is 3%-8%, the cement is P.O42.5 ordinary Portland cement, the active admixture is fly ash, the fiber is polyethylene fiber, the length is 6mm, and the water reducer is polycarboxylic acid Water reducing agent, water is ta...

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Abstract

The invention relates to the fields of building 3D printing and waste recycling, specifically to a method for blending commercial concrete into 3D printing concrete on site. The invention firstly discloses a special additive used for 3D printing concrete. The special additive comprises the following components in parts by weight: 0.5-2 parts of cellulose ether, 0-2 parts of a defoaming agent, 0.1-2 parts of polyacrylamide, 0.1-3 parts of a setting accelerator, 0.1-3 parts of an early strength agent and 1-5 parts of attapulgite. According to the invention, through addition of the special additive, the working performance of commercial concrete can be regulated and controlled on site, so the commercial concrete can meet the requirement of printability. In addition, the preparation process for the 3D printing concrete provided by the invention is simple, facilitates industrial production, facilitates promoting large-batch application of the 3D printing concrete, and has practical engineering significance.

Description

technical field [0001] The invention relates to the fields of building 3D printing and waste recycling, in particular to a method for using commercial concrete to prepare 3D printed concrete on site. Background technique [0002] In recent years, my country's industrialization process has been accelerating, and "promoting the simultaneous development of new industrialization, informatization, urbanization, and agricultural modernization" has become a basic national policy. As a part of the industrialization process, construction industrialization has also developed rapidly in recent years. As one of the ways of "intelligent production", 3D printing technology will reduce manual labor, speed up production, and reduce the amount of waste concrete when used in the construction industry, thereby greatly accelerating the development of construction industrialization. At present, most of the materials used in 3D printing buildings at home and abroad are 3D printing mortar, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04C04B28/08B28B1/00C04B24/38B33Y70/10
CPCC04B28/04C04B28/08C04B28/00C04B40/0039B28B1/001B33Y70/00C04B2201/50C04B24/383C04B2103/50C04B24/2652C04B2103/12C04B2103/10C04B22/08C04B14/02C04B14/06C04B18/16C04B2103/302C04B18/146C04B16/0625C04B18/08Y02W30/91
Inventor 肖建庄侯少丹段珍华
Owner TONGJI UNIV
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