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A kind of anti-nuclear explosion and radiation-proof 3D printing concrete

A 3D printing and concrete technology, applied in the field of anti-nuclear explosion and radiation-proof 3D printing concrete, can solve the problems of being unable to meet the requirements of working conditions, unable to achieve anti-nuclear explosion and radiation shielding, and unable to meet the requirements of 3D printing workability, and achieve good results. Work performance and mechanical properties, the effect of high apparent density

Active Publication Date: 2021-02-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing anti-explosion and anti-radiation concrete is still difficult to self-made by adding materials, and it cannot meet the workability requirements of 3D printing.
In terms of mix ratio design of 3D printed concrete, there are already concrete mix ratio designs that can adapt to different strengths, different printing processes and work performance, such as Chinese patent documents with application numbers CN201910134165, CN201810913908, and CN201910133642, but the existing 3D printed concrete cannot Realize the functions of anti-nuclear explosion and radiation shielding, and cannot meet the requirements of special working conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In terms of parts by weight, the configured anti-nuclear explosion 3D printing concrete includes 90 parts of cementitious material, 32 parts of water, 200 parts of fine barite, 60 parts of magnetite powder, 2.5 parts of polycarboxylate superplasticizer, slow 0.25 parts of coagulant tartaric acid, 0.2 parts of air-entraining agent sodium abietate and 0.5 parts of PVA fiber. share.

[0024] The anti-nuclear explosion concrete prepared in this embodiment has good printability (fluidity 171), 28d compressive strength greater than 35Mpa, has impact resistance (destructive impact times greater than 150), high density (3550kg / m 3 ), the cost is reasonable.

Embodiment 2

[0026] In terms of parts by weight, the configured anti-nuclear explosion 3D printing concrete includes 85 parts of cementitious material, 27 parts of water, 190 parts of fine boron glass sand, 20 parts of chrome ore powder, 2.15 parts of polycarboxylate superplasticizer, retarding 0.2 parts tartaric acid, 0.2 parts sodium rosinate air-entraining agent and 2.5 parts lead fiber, cementitious materials include 50 parts of 42.5 Portland cement and 35 parts of superfine fly ash.

[0027] The anti-nuclear explosion concrete prepared by the present embodiment has good working performance (fluidity 182), 28d compressive strength greater than 48Mpa, has impact resistance (destructive impact times greater than 250), high density (3820kg / m 3 ), high radiation shielding ability (high boron doping) and other properties.

Embodiment 3

[0029] In terms of parts by weight, the configured anti-nuclear explosion 3D printing concrete includes 98 parts of cementitious material, 32 parts of water, 90 parts of fine chrome ore, 40 parts of boron powder, 2.25 parts of polycarboxylate superplasticizer, retarder tartaric acid 0.2 parts, 0.15 parts of air-entraining agent SJ-2 saponin, 1.5 parts of steel fiber, cementitious materials including 63 parts of 42.5 rapid hardening sulfoaluminate cement, 18 parts of ultrafine powdered mineral powder, and 17 parts of ultrafine powdered silica fume .

[0030] The anti-nuclear explosion concrete prepared in this embodiment has good printability (fluidity 175), 28d compressive strength greater than 55Mpa, has impact resistance (destructive impact times greater than 220), high density (3940kg / m 3 ), excellent radiation shielding (medium boron doping) and other properties.

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Abstract

The intention discloses anti-nuclear explosion and anti-radiation 3D printing concrete which comprises the following components in parts by weight: 80-120 parts of a cementing material, 70-250 parts of special sand, 10-60 parts of metal powder, 0.5-10 parts of fiber, 20-70 parts of water and 1.3-3.3 parts of an additive, wherein the cementing material comprises cement and superfine powder. The concrete provided by the invention has high apparent density and good working performance and mechanical property, and can realize automatic mold-free construction in a dangerous environment.

Description

technical field [0001] The invention belongs to the technical field of building materials and construction, and in particular relates to a 3D printing concrete for anti-nuclear explosion and anti-radiation. Background technique [0002] Since 3D printing can be information-based modeling and mechanized construction, it is suitable for structural construction in harsh environments. Therefore, it is necessary to explore a kind of anti-nuclear explosion and radiation-shielding 3D printed concrete based on the 3D printing process to meet the engineering construction needs in extreme backgrounds. The current mix design of anti-blast and anti-radiation concrete increases the anti-blast and wear resistance by adding fibers, increases the density of concrete to increase impact resistance, and increases radiation-absorbing materials to achieve radiation shielding ability. [0003] my country's GB / T34008-2017 "Radiation Protection Concrete" testing standard clearly stipulates that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/06C04B28/10C04B28/30C04B28/00C04B111/20
CPCC04B28/00C04B28/04C04B28/06C04B28/10C04B28/30C04B2111/20C04B2201/50C04B14/368C04B14/308C04B2103/302C04B2103/22C04B2103/304C04B16/0641C04B7/147C04B7/24C04B14/22C04B14/307C04B14/48C04B7/26C04B22/02
Inventor 孙晓燕陈龙王海龙汪群张治成
Owner ZHEJIANG UNIV
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