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3D printed solid waste concrete member and preparation method

A 3D printing, waste concrete technology, applied in the field of concrete, can solve the problems of low shrinkage, 3D printing components cannot be embedded with steel bars, etc., to achieve the effect of reducing density, adjustable setting time, and strong corrosion resistance

Active Publication Date: 2020-06-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concrete component is composed of a high-strength, low-shrinkage, high-durability 3D-printed mortar formwork and a lightweight, high-strength solid waste concrete core. The 3D-printed mortar formwork can achieve rapid hardening, early strength and low shrinkage. It can be used as a permanent formwork for components, saving ordinary The use of wood and steel formwork improves the construction speed. The concrete filled inside has good fluidity, can achieve self-compacting and small shrinkage in the later stage, and can be used with steel bars, which solves the problem that 3D printed components cannot be embedded in steel bars. The core and the 3D printing mortar formwork have good bonding strength, which can absorb a large amount of FRP solid waste. The combination of solid waste recycling and 3D printing intelligent construction is conducive to promoting the practical engineering application of 3D printing concrete

Method used

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  • 3D printed solid waste concrete member and preparation method
  • 3D printed solid waste concrete member and preparation method
  • 3D printed solid waste concrete member and preparation method

Examples

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preparation example Construction

[0025] The preparation method of the above-mentioned 3D printing solid waste concrete member comprises the following steps:

[0026] (1) Prepare 3D printing mortar template:

[0027] The 3D printing mortar template adopts two-stage mixing, the first-stage mixing: 0.56-0.74 parts of sulfoaluminate cement, 2.24-2.96 parts of ordinary Portland cement, 0.57-1.28 parts of fly ash, 0.23-0.0.59 parts of silicon Ash, 3.5-5.9 parts of quartz sand and 0.01-0.05 parts of lime are sent to a horizontal mortar mixer for mixing and stirring to obtain a mixed dry material; then 0.1-0.14 parts of water reducer and 1.2-1.5 parts of water are mixed and added to the above mixing Stir in the dry material for 4-10 minutes, then add 0.14-0.19 parts of regenerated glass fiber reinforced plastics, continue stirring until completely mixed to obtain cement mortar, and finally add recycled glass fiber reinforced plastics to facilitate fiber dispersion;

[0028] The second stage of mixing: pump or mechanic...

Embodiment 1

[0041] In this embodiment, a 3D printed solid waste concrete component, in parts by weight, the composition and content of the concrete component are:

[0042] 0.6 parts of rapid-hardening and early-strength sulfoaluminate cement;

[0043] Ordinary Portland cement 5.1 parts;

[0044] 0.78 parts of fly ash;

[0045] 0.25 parts of silica fume;

[0046] Mineral powder 0.3 parts;

[0047] Lime 0.02 part;

[0048] 3.5 parts of quartz sand,

[0049] 4.5 parts of ordinary river sand;

[0050] 6.8 parts of coarse aggregate;

[0051] 1 part of recycled FRP aggregate;

[0052] 0.06 parts of regenerated FRP powder;

[0053] 0.08 parts of alkali aggregate inhibitor;

[0054] 0.19 parts of water reducing agent;

[0055] 0.15 parts of regenerated fiberglass;

[0056] 0.12 parts of coagulant;

[0057] 2.5 parts of water.

[0058] The above raw materials are divided into two groups, the first group is 0.6 parts of rapid hardening and early strength sulfoaluminate cement; 2.5 part...

Embodiment 2

[0073] In this embodiment, a 3D printed solid waste concrete component, the composition and content of the concrete are as follows in parts by weight:

[0074] 0.7 parts of rapid-hardening and early-strength sulfoaluminate cement;

[0075] Ordinary Portland cement 7.5 parts;

[0076] 1.4 parts of fly ash;

[0077] 0.5 parts of silica fume;

[0078] 1.2 parts of mineral powder;

[0079] Lime 0.04 part;

[0080] 5.2 parts of quartz sand,

[0081] 6 parts of ordinary river sand;

[0082] 8.5 parts of coarse aggregate;

[0083] 1.2 parts of recycled FRP aggregate;

[0084] 0.06 parts of regenerated FRP powder;

[0085] 0.09 parts of alkali aggregate inhibitor;

[0086] 0.22 parts of water reducing agent;

[0087] 0.18 parts of regenerated glass fiber reinforced plastics;

[0088] 0.14 parts of coagulant;

[0089] 2.9 parts of water.

[0090] The above raw materials are divided into two groups, the first group is 0.7 parts of rapid hardening and early strength sulfoalu...

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Abstract

The invention relates to a 3D printed solid waste concrete member and a preparation method. The concrete member comprises a 3D printed mortar template and a concrete inner core which is filled in thetemplate and can be implanted with reinforcing steel bars, the 3D printed mortar template is made of 3D printing mortar with low shrinkage and high durability, and the concrete filled in the 3D printed mortar template has good fluidity, can realize self-compaction and has small later shrinkage. The 3D printed mortar template can realize quick hardening, early strength and low shrinkage and can beused as a permanent template of a component; the use amount of common wood and steel templates is reduced; the construction speed is accelerated, the internally filled concrete can be matched with reinforcing steel bars for use; the problem that reinforcing steel bars cannot be implanted into a 3D printed component is solved, the concrete inner core and the 3D printed mortar template have good bonding strength, a large amount of glass fiber reinforced plastic solid waste is consumed, solid waste resource recycling and 3D printing intelligent construction are combined, and actual engineering application of 3D printing concrete is promoted.

Description

technical field [0001] The invention belongs to the technical field of concrete, and specifically provides a 3D printed solid waste concrete component, which can be applied to bridge engineering and house construction engineering. Background technique [0002] Since my country's FRP industry was developed in 1958, after more than 60 years, especially after the reform and opening up, it has developed rapidly, the industry scale has continued to expand, and the output has increased rapidly. At the same time, the amount of waste FRP produced every year is also quite alarming. It is estimated that by 2030, my country's waste FRP will reach more than 4 million tons, which will bring serious economic and environmental problems. At present, there is no feasible technical option for the treatment of FRP waste, because the glass fibers in FRP waste can improve the toughness of cement composites, and the presence of polymers, CaO, Al in FRP waste 2 o 3 and SiO 2 , can improve the b...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B28/04B33Y70/00B33Y80/00
CPCB33Y70/00B33Y80/00C04B28/04C04B28/06C04B2111/00017C04B2111/00181C04B2201/20C04B2201/50C04B7/02C04B18/08C04B18/146C04B14/06C04B16/0675C04B22/064C04B2103/10C04B2103/302C04B14/048C04B14/28C04B14/02C04B18/20C04B22/10C04B22/147C04B24/06
Inventor 马国伟张默王里周博宇
Owner HEBEI UNIV OF TECH
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