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High-strength cement-based composite fiber electromagnetic shielding material and preparation method thereof

An electromagnetic shielding material and composite fiber technology, which is applied in the field of high-strength cement-based composite fiber electromagnetic shielding materials and their preparation, can solve the problems of low mechanical properties of electromagnetic shielding concrete, narrow electromagnetic shielding range, low electromagnetic shielding efficiency and the like, and achieve electromagnetic shielding. The effect of good efficiency, wide electromagnetic shielding range and high electromagnetic shielding efficiency

Pending Publication Date: 2020-08-07
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the object of the present invention is to solve the problems of low mechanical properties of electromagnetic shielding concrete, narrow electromagnetic shielding range, and low electromagnetic shielding effectiveness, and provide a concrete concrete with good mechanical properties, good durability, wide electromagnetic shielding range, and electromagnetic High-strength cement-based composite fiber electromagnetic shielding material with high shielding efficiency and simple preparation process and preparation method thereof

Method used

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  • High-strength cement-based composite fiber electromagnetic shielding material and preparation method thereof
  • High-strength cement-based composite fiber electromagnetic shielding material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0056]A high-strength cement-based composite fiber electromagnetic shielding material, comprising the following raw materials in parts by weight:

[0057] 300 parts of cement whose strength is not less than 32.5MPa;

[0058] 260 parts of admixtures with an average particle size of 5-30 μm;

[0059] 600 parts of counterweight iron sand with an average particle size of 0.15-4.75mm;

[0060] 200 parts of fine aggregate with an average particle size of 0.15-4.75mm;

[0061] 10 parts of graphite powder;

[0062] 1 piece of carbon fiber with a length of 12-14mm;

[0063] 10 parts of carbon black powder;

[0064] 60 parts of steel fiber;

[0065] 15 parts of high performance admixture;

[0066] The ratio of water to glue is 0.16.

[0067] Wherein, the admixture comprises the following raw materials in weight percentage: 28% of silica fume, 19% of mineral powder, 14% of fly ash, 17% of ceramic polishing powder, and 22% of steel slag powder; 3.5~4.5g / cm 3 The low specific grav...

Embodiment 2

[0074] Except that the formulation of the high-strength cement-based composite fiber electromagnetic shielding material is different, other conditions are the same as in Example 1. The high-strength cement-based composite fiber electromagnetic shielding material includes the following raw materials in parts by weight:

[0075] 500 parts of cement whose strength is not less than 32.5MPa;

[0076] 400 parts of admixtures with an average particle size of 5-30 μm;

[0077] 1,000 parts of counterweight iron sand with an average particle size of 0.15-4.75mm;

[0078] 400 parts of fine aggregate with an average particle size of 0.15-4.75 mm;

[0079] 30 parts of graphite powder;

[0080] 5 parts of carbon fiber with a length of 12-14mm;

[0081] 20 parts of carbon black powder;

[0082] 90 parts of steel fiber;

[0083] 25 parts of high-performance admixture;

[0084] The ratio of water to glue is 0.2.

[0085] Wherein, the admixture silica fume; the counterweight iron sand h...

Embodiment 3

[0087] Except that the formulation of the high-strength cement-based composite fiber electromagnetic shielding material is different, other conditions are the same as in Example 1. The high-strength cement-based composite fiber electromagnetic shielding material includes the following raw materials in parts by weight:

[0088] 350 parts of cement whose strength is not less than 32.5MPa;

[0089] 295 parts of admixtures with an average particle size of 5-30 μm;

[0090] 700 parts of counterweight iron sand with an average particle size of 0.15-4.75mm;

[0091] 250 parts of fine aggregate with an average particle size of 0.15-4.75mm;

[0092] 15 parts of graphite powder;

[0093] 2 pieces of carbon fiber with a length of 12-14mm;

[0094] 12.5 parts of carbon black powder;

[0095] 70 parts of steel fiber;

[0096] 17.5 parts of high-performance admixture;

[0097] The ratio of water to glue is 0.17.

[0098] Wherein, the admixture includes the following raw materials in...

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Abstract

The invention discloses a high-strength cement-based composite fiber electromagnetic shielding material and a preparation method thereof, belonging to the technical field of electromagnetic shieldingmaterials. The high-strength cement-based composite fiber electromagnetic shielding material comprises the following main components: 300-500 parts of cement with strength of not lower than 32.5 MPa,260-400 parts of an admixture with an average particle size of 5-30 [mu] m, 600--1900 parts of counterweight iron sand with an average particle size of 0.15-4.75 mm, 200-400 parts of fine aggregate with an average particle size of 0.15-4.75 mm, 10-30 parts of graphite powder, 1-5 parts of carbon fibers with a length of 12-14 mm, 10-20 parts of carbon black powder, 60-90 parts of steel fibers and 15-25 parts of a high-performance additive, wherein a water-binder ratio is 0.16-0.2. The high-strength cement-based composite fiber electromagnetic shielding material prepared by using a technical scheme in the invention has the characteristics of high shielding effectiveness, wide shielding frequency range, good mechanical property, good durability, wide application range and the like, and is applicable to development and application of high-shielding-effectiveness electromagnetic shielding materials.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding concrete, in particular to a high-strength cement-based composite fiber electromagnetic shielding material and a preparation method thereof. Background technique [0002] With the development of modern high-tech, the problems of electromagnetic interference and electromagnetic compatibility caused by electromagnetic waves are becoming more and more serious, which will not only cause interference and damage to electronic instruments and equipment, affect their normal work, seriously restrict the international competitiveness of my country's electronic products and equipment, and will It pollutes the environment and endangers human health; in addition, the leakage of electromagnetic waves will endanger national information security and the security of military core secrets. In particular, the electromagnetic pulse weapon as a new concept weapon has made a substantial breakthrough, w...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/38C04B14/48C04B14/02
CPCC04B28/00C04B2111/00258C04B2201/50C04B2201/52C04B14/024C04B14/022C04B14/386C04B14/48C04B2103/302C04B14/06C04B14/068C04B18/146C04B18/141C04B18/08C04B18/165C04B18/142C04B14/308C04B14/36
Inventor 刘福财肖敏黎浩黄贺明
Owner 黄贺明