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A high-toughness concrete 3D printing composite material and its coordinated printing process

A 3D printing and composite material technology, which is applied in the field of high toughness concrete 3D printing composite materials and its coordinated printing process, can solve the problems of high ductility concrete structure bearing capacity and low economic efficiency, so as to avoid the problem of new and old interface, avoid Interface problems, the effect of consistent attributes

Active Publication Date: 2022-05-06
HEBEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-toughness concrete 3D printing composite material and its coordinated printing process to solve the problem of low load-bearing performance and economical efficiency of the high-ductility concrete structure used in the above-mentioned concrete 3D printing technology

Method used

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  • A high-toughness concrete 3D printing composite material and its coordinated printing process
  • A high-toughness concrete 3D printing composite material and its coordinated printing process
  • A high-toughness concrete 3D printing composite material and its coordinated printing process

Examples

Experimental program
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Embodiment 1

[0045] In parts by weight, 720 parts of Portland cement, 80 parts of sulphoaluminate cement, 200 parts of silica fume, and 1200 parts of quartz sand were mixed to obtain a mixed material; in parts by weight, 10 parts of water reducer, 3 parts of cellulose were mixed with 300 parts of water to obtain a mixed solution. Pre-stir the obtained mixed material in the stirring pot for 2 minutes; then add the mixed solution at a constant speed within 10s and stir for 10 minutes; finally, add 9 parts of PE fiber and 78 parts of steel fiber evenly into the mixed material and stir for 2 minutes, That is, the high-toughness 3D printed concrete 1 is obtained.

[0046] In parts by weight, mix 720 parts of Portland cement, 80 parts of sulphoaluminate cement, 200 parts of silica fume, and 1400 parts of quartz sand to obtain a mixed material; in parts by weight, mix 4 parts of water reducer with 350 parts of water were mixed to obtain a mixed solution. The obtained mixed material was pre-stir...

Embodiment 2

[0049] The difference between Example 2 and Example 1 is that "720 parts of Portland cement, 80 parts of sulphoaluminate cement" in the high-toughness 3D printing concrete is replaced by "760 parts of Portland cement, sulphoaluminate cement 40 parts ", other steps are identical with embodiment 1, promptly obtain the composite material of the present invention. The composite material is printed using the 3D printing parameters in Example 1, and the mechanical properties are characterized as image 3 Example 2.

Embodiment 3

[0051]The difference between Example 3 and Example 1 is that "720 parts of Portland cement, 80 parts of sulphoaluminate cement" in the high-toughness 3D printing concrete is replaced by "700 parts of Portland cement, sulphoaluminate cement 100 parts ", other steps are identical with embodiment 1, promptly obtain the composite material of the present invention. The composite material is printed using the 3D printing parameters in Example 1, and the mechanical properties are characterized as image 3 Example 3.

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Abstract

The invention discloses a high-toughness concrete 3D printing composite material and its coordinated printing process, including conventional 3D printing concrete and high-toughness 3D printing concrete, and the conventional 3D printing concrete includes the following components: Portland cement, sulfur aluminum Salt cement, silica fume, quartz sand, fine aggregate, water reducer, water; the high toughness 3D printing concrete includes the following components: Portland cement, sulphoaluminate cement, silica fume, quartz sand, fine Aggregate, PE fiber, steel fiber, superplasticizer, cellulose, water. The present invention adopts a high-toughness concrete 3D printing composite material with the above structure and its coordinated printing process, and with the help of the high-toughness 3D concrete material's excellent mechanical toughness and toughening conventional 3D printing concrete, it solves the difficult problem of synchronous implantation of steel grids , high-toughness 3D printing concrete and conventional 3D printing materials to prepare composite materials, which can effectively avoid the problem of new and old material interface, and realize the collaborative load bearing of composite materials.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-toughness concrete 3D printing composite material and its coordinated printing process. Background technique [0002] Concrete 3D printing technology, as an efficient, economical and intelligent construction method, has been extended to the field of load-bearing structure engineering, but it is difficult to realize the simultaneous implantation of steel grids during the construction process, the 3D printed structure has insufficient ductility, the structure is easy to crack, and the load-bearing performance is low. And other shortcomings, it is difficult to adapt to engineering applications. High ductility concrete (such as engineering cement-based composites (ECC), ultra-high performance concrete (UHPC) and strain-hardening cement-based composites (SHCC), etc.) is a cement-based composite material with good mechanical properties and high toughness. Although du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06B33Y70/10B33Y10/00
CPCC04B28/06B33Y70/10B33Y10/00C04B2111/00181C04B7/02C04B18/146C04B14/06C04B2103/302C04B24/383C04B14/48C04B16/0625
Inventor 马国伟李荣王锴王里蔡晓亮白刚
Owner HEBEI UNIV OF TECH