Lightweight high-ductility cement-based composite material capable of being used for 3D printing and preparation method thereof

A composite material, 3D printing technology, applied in the direction of climate sustainability, additive processing, sustainable waste treatment, etc., can solve problems such as not being able to meet large-scale engineering structures, reducing the buildability of 3D printing, and complex types of raw materials. , to improve the resistance to plastic deformation, the 3D printing process is smooth and fast, and the effect of less variety

Active Publication Date: 2021-06-01
SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention has complex types of raw materials, cumbersome preparation, high cost, and large bulk density, which reduces the constructability of 3D printing and cannot meet the needs of large-scale engineering structures.

Method used

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  • Lightweight high-ductility cement-based composite material capable of being used for 3D printing and preparation method thereof
  • Lightweight high-ductility cement-based composite material capable of being used for 3D printing and preparation method thereof
  • Lightweight high-ductility cement-based composite material capable of being used for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a kind of preparation method of light sand, comprises the following steps:

[0038] Step 1: The cinder, dolomite and perlite are pulverized by a jaw crusher, and the pulverized material is poured into a ball mill for ball milling for 4-5 hours, and the obtained powder is passed through a 350-mesh sieve. The mass ratio of cinder, dolomite and perlite is 10:1:2, cinder is the main component of light sand, dolomite is mainly used to produce pores of light sand, and perlite is used as auxiliary filling material;

[0039] Step 2. Add the obtained powder into a granulator for stirring at a stirring speed of 150r / min. During the stirring process, spray water mist accounting for 3% of the mass of the powder. When the particle size of the particles is between 80 mesh and 12 mesh Stirring was stopped to obtain semi-finished granules; 0

[0040] Step 3. Transfer the semi-finished granules into a drying kiln, and keep the temperature at 105±5°C for ...

Embodiment 2

[0044] This embodiment provides a light-weight and high-ductility cement-based composite material that can be used for 3D printing, which is obtained by the following preparation steps:

[0045] Step 1. Mix and stir 300 parts of cement, 200 parts of fly ash, 200 parts of rice husk ash, 200 parts of light sand, and 200 parts of glass microspheres to obtain dry material A1;

[0046] Step 2. Pour 15 parts of high-efficiency water reducer into 180 parts of water and stir evenly, then add it to dry material A1 and mix evenly to obtain slurry B1;

[0047] Step 3, disperse and sprinkle 10 parts of synthetic fibers into the slurry B1, and stir evenly to obtain a lightweight and high-ductility cement-based composite material that can be used for 3D printing. See the specific physical figure in this embodiment figure 1 .

Embodiment 3

[0049] This embodiment provides a light-weight and high-ductility cement-based composite material that can be used for 3D printing, which is obtained by the following preparation steps:

[0050] Step 1. Mix and stir 350 parts of cement, 200 parts of fly ash, 150 parts of rice husk ash, 250 parts of light sand, and 150 parts of glass microspheres to obtain dry material A2;

[0051] Step 2. Pour 18 parts of high-efficiency water reducer into 170 parts of water and stir evenly, then add it to dry material A2 and mix evenly to obtain slurry B2;

[0052] Step 3, disperse and sprinkle 15 parts of synthetic fibers into the slurry B2, and stir evenly to obtain a lightweight and high-ductility cement-based composite material that can be used for 3D printing.

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Abstract

The invention discloses a lightweight high-ductility cement-based composite material capable of being used for 3D printing and a preparation method thereof. The cement-based composite material is prepared from the following components by weight: 300-400 parts of cement, 200-300 parts of fly ash, 100-200 parts of rice hull ash, 200-250 parts of light sand, 100-200 parts of glass beads, 12-18 parts of a high-efficiency water reducing agent, 10-20 parts of synthetic fiber and 160-200 parts of water. The specific preparation method comprises the following steps of: uniformly mixing and stirring 300-400 parts of cement, 200-300 parts of fly ash, 100-200 parts of rice hull ash, 200-250 parts of light sand and 100-200 parts of glass beads to obtain a dry material; pouring 12-18 parts of the high-efficiency water reducing agent into 160-200 parts of water, uniformly stirring the substances, adding the mixture into the dry material, and uniformly mixing and stirring the substances to obtain slurry; dispersing and scattering 10-20 parts of synthetic fibers into the slurry, and uniformly stirring the substances to obtain the lightweight high-ductility cement-based composite material capable of being used for 3D printing. The preparation method is simple, the variety of raw materials is few, the prepared cement-based composite material meets the printability requirement, and the constructability is improved due to the characteristics of light weight and high strength.

Description

technical field [0001] The invention belongs to the technical field of cement-based composite material preparation, and in particular relates to a lightweight high-ductility cement-based composite material that can be used for 3D printing and a preparation method thereof. Background technique [0002] The high-ductility cement-based composite material came out in the 1990s. It is a kind of high-performance fiber-reinforced cement-based composite material. It is a new type of engineering based on the optimization design of microscopic physical and mechanical principles, and has the characteristics of strain hardening and multi-slit cracking. with cement-based composites. Because of its high ductility, ultra-high toughness, and high crack resistance, which are different from the brittleness of ordinary cement-based, it has attracted widespread attention in the industry. Combining the theory of microstructure and fracture mechanics, the researchers optimized the design of fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04B33Y70/10
CPCC04B28/04B33Y70/10C04B2111/00181C04B2201/50C04B2201/20C04B18/08C04B18/101C04B14/22C04B14/28C04B14/18C04B18/103C04B16/0625Y02W30/91
Inventor 苟鸿翔朱敏涛董赛阳高双双魏劼卞成辉
Owner SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD
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