A 3D-printable copper slag electromagnetic wave-absorbing concrete and a method of using the same

A 3D printing, electromagnetic wave absorption technology, applied in the direction of additive processing, etc., to achieve excellent electromagnetic wave absorption performance, reduce the influence of electromagnetic interference, excellent fluidity and extrudability.

Active Publication Date: 2020-10-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The advantage of 3D printing concrete is that it can reduce labor costs, material costs, and mechanical transportation costs. For example, the Chinese patent application number 201610947297.1 discloses a kind of concrete for 3D printing, and the Chinese patent application number 201510375110.0 discloses a kind of concrete for 3D printing. Printed high-performance powder concrete, and the Chinese patent application number 201510228281.0 disclose a concrete material that can be used for 3D printing and its preparation method. None of the above-mentioned 3D printed concrete materials involves the preparation of electromagnetic absorbing materials

Method used

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  • A 3D-printable copper slag electromagnetic wave-absorbing concrete and a method of using the same
  • A 3D-printable copper slag electromagnetic wave-absorbing concrete and a method of using the same
  • A 3D-printable copper slag electromagnetic wave-absorbing concrete and a method of using the same

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preparation example Construction

[0057] The preparation method of the 3D-printable copper slag electromagnetic wave-absorbing concrete of the present invention comprises the following steps:

[0058] (1) According to parts by weight, the above raw materials are divided into four groups, the first group is 6.8-7.2 parts of rapid hardening ordinary Portland cement, 1.65-1.75 parts of copper slag, 6.9-7.1 parts of quartz sand; the second group is 0.75-0.85 parts of silica fume and 0.04-0.07 parts of basalt fiber; the third group is 0.09-0.15 parts of water reducing agent, 0.28-0.71 parts of copper powder; the fourth group is 1.70-1.74 parts of water and 0.003-0.005 parts of hydroxyl Propyl methylcellulose;

[0059] (2) Send the raw materials of the first group into the horizontal mixer at the same time for 90-100s, then add the second group of raw materials into the above-mentioned homogeneous mixture at the same time, and then mix and stir for 180-200s , until completely mixed;

[0060] (3) Mix the raw materi...

Embodiment 1

[0067] In this embodiment, the copper slag electromagnetic wave-absorbing concrete that can be printed in 3D is calculated in parts by weight, and the composition and content of the concrete are respectively:

[0068] 7.0 parts of 42.5# rapid hardening ordinary Portland cement;

[0069] 7.0 parts of quartz sand;

[0070] 1.70 parts of copper slag;

[0071] 0.80 parts of silica fume;

[0072] 0.12 parts of water reducing agent;

[0073] 0.2 parts of brass powder;

[0074] 0.08 parts of copper powder;

[0075] 0.05 parts of basalt fiber with a length of 12mm;

[0076] Viscosity is 0.004 part of HPMC viscosity modifier of 50,000;

[0077] 1.72 parts of water.

[0078] The specific surface area of ​​the rapid hardening ordinary Portland cement is 348m 2 / kg, the density is 3.0g / cm 3 , the standard consistency water consumption is 25.9%, the initial setting time is 170min, the final setting time is 210min, the loss on ignition is 3.5%, the magnesium oxide content is 2.18%,...

Embodiment 2

[0098] In this embodiment, the copper slag electromagnetic wave-absorbing concrete that can be printed in 3D is calculated in parts by weight, and the composition and content of the concrete are respectively:

[0099] 7.0 parts of 42.5# rapid hardening ordinary Portland cement;

[0100] 7.0 parts of quartz sand;

[0101] 1.70 parts of copper slag;

[0102] 0.80 parts of silica fume;

[0103] 0.12 parts of water reducing agent;

[0104] 0.3 parts of brass powder;

[0105] 0.13 parts of copper powder;

[0106] 0.05 parts of basalt fiber with a length of 12mm;

[0107] Viscosity is 0.004 part of HPMC viscosity modifier of 50,000;

[0108] 1.70-1.74 parts of water.

[0109] The specific surface area of ​​the rapid hardening ordinary Portland cement is 348m 2 / kg, the density is 3.0g / cm 3 , the standard consistency water consumption is 25.9%, the initial setting time is 170min, the final setting time is 210min, the loss on ignition is 3.5%, the magnesium oxide content is 2...

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Abstract

The invention relates to 3D-printable copper slag electromagnetic wave-absorbing concrete and a use method thereof. The concrete includes, by weight, 6.8-7.2 parts of quick-hardening ordinary Portlandcement, 6.9-7.1 parts of quartz sand, 1.65-1.75 parts of copper slag, and 0.28-0.71 parts of copper powder composed of brass powder and red copper powder according to the weight ratio of 7:2.5-3.5, 0.75-0.85 parts of silica fume, 0.09-0.15 parts of a water reducer, 0.04-0.07 parts of basalt fiber being 11-14 mm in length, 0.003-0.005 parts of hydroxypropyl methyl cellulose being 20,000-70,000 inviscosity, and 1.70-1.74 parts of water. With the copper slag and copper powder as raw materials, the concrete has both the printability and electromagnetic wave-absorbing effect of the copper slag and copper powder, so that the concrete allows 3D printing and can achieve more than 90% in electromagnetic wave absorption in the bandwidth of 3.4 GHz.

Description

technical field [0001] The invention relates to the technical field of 3D printing concrete, in particular to a 3D printable copper slag electromagnetic wave-absorbing concrete and a method for using the same. Background technique [0002] Architectural-grade 3D printing rapid prototyping technology is a new construction technology that uses mechatronics technology to automatically print cement-based materials layer by layer into the designed structure. 3D printing technology has the advantages of fast, flexible and high efficiency, and has achieved significant development in roads, bridges, construction and other fields. Concrete 3D printing technology can use various solid cementitious materials, carbon materials, metal materials and liquid chemical additives for the preparation of materials, which is conducive to improving the functionality and durability of materials. At the same time, 3D printing concrete technology has also been widely promoted due to its many advanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04B33Y10/00B33Y70/10
CPCB33Y10/00B33Y70/00C04B28/04C04B2111/00258C04B2111/00844C04B14/06C04B18/144C04B14/34C04B14/46C04B18/146C04B24/383C04B2103/302
Inventor 王里马国伟
Owner HEBEI UNIV OF TECH
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