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Lightweight concrete with electromagnetic shielding functions, and preparation method thereof

A lightweight concrete and electromagnetic shielding technology, which is applied in the field of concrete and its preparation, can solve the problems of increasing the amount of carbon fiber, not significantly improving the shielding efficiency of concrete, and decreasing the performance of concrete such as compression resistance and hardness.

Active Publication Date: 2015-04-01
清远肆柒柒新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shielding effectiveness of 15dB still cannot meet the market demand. Continuing to increase the amount of carbon fiber will not significantly improve the shielding effectiveness of concrete, and may also lead to a decline in the compressive and hardness properties of concrete.

Method used

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  • Lightweight concrete with electromagnetic shielding functions, and preparation method thereof
  • Lightweight concrete with electromagnetic shielding functions, and preparation method thereof
  • Lightweight concrete with electromagnetic shielding functions, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment provides a kind of lightweight concrete with electromagnetic shielding function, and its raw material comprises by weight:

[0028] Portland cement 51 parts;

[0029] Carbon fiber 7 parts;

[0030] 4 parts of waste polypropylene particles;

[0031] Iron powder 6 parts;

[0032] 15 parts of river sand;

[0033] 25 parts of water;

[0034] Admixture 2 parts;

[0035] The admixture comprises 55 parts by weight of polycarboxylate water reducer, 4 parts of butylene glycol ester, 12 parts of oxaloacetic acid and 7 parts of sodium persulfate.

[0036] The length of the carbon fiber is 4 mm; the particle size of the waste polypropylene is 5 mm; the particle size of the iron powder is 10 μm. The river sand is made by mixing coarse sand with a fineness modulus of 3.1 mm and fine sand with a fineness modulus of 2.2 mm at a mass ratio of 4:1.

[0037] Present embodiment also provides a kind of method for preparing above-mentioned lightweight concrete, ...

Embodiment 2

[0044] The present embodiment provides a kind of lightweight concrete with electromagnetic shielding function, and its raw material comprises by weight:

[0045] Portland cement 40 parts;

[0046] Carbon fiber 10 parts;

[0047] 3 parts of waste polypropylene particles;

[0048] Iron powder 8 parts;

[0049] 10 parts of river sand;

[0050] 30 parts of water;

[0051] Admixture 1 part;

[0052] The additives include 70 parts by weight of polycarboxylate water reducer, 1 part of butylene glycol ester, 15 parts of oxaloacetic acid and 5 parts of sodium persulfate. The PC-1026 of the preferred SUNBO company of described polycarboxylate water reducing agent

[0053] The Portland cement is preferably a commercially available Portland cement with a P.I strength grade of 42.5R.

[0054] The length of the carbon fiber is 5 mm; the particle size of the waste polypropylene is 1 mm; the particle size of the iron powder is 15 μm. The river sand is made by mixing coarse sand with a...

Embodiment 3

[0057] The present embodiment provides a kind of lightweight concrete with electromagnetic shielding function, and its raw material comprises by weight:

[0058] Portland cement 60 parts;

[0059] Carbon fiber 5 parts;

[0060] 5 parts of waste polypropylene particles;

[0061] Iron powder 4 parts;

[0062] 20 parts of river sand;

[0063] 15 parts of water;

[0064] 3 parts of admixture;

[0065] The additives include 50 parts by weight of polycarboxylate water reducer, 10 parts of butylene glycol ester, 15 parts of oxaloacetic acid and 5 parts of sodium persulfate.

[0066] The length of the carbon fiber is 3 mm; the particle size of the waste polypropylene is 15 mm; the particle size of the iron powder is 10 μm. The river sand is made by mixing coarse sand with a fineness modulus of 3.1 mm and fine sand with a fineness modulus of 2.2 mm at a mass ratio of 4:1.

[0067] The lightweight concrete of this embodiment is made by the method provided in Embodiment 1.

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Abstract

The invention discloses lightweight concrete with electromagnetic shielding functions. Raw materials of the lightweight concrete comprise Portland cement, carbon fiber, waste polypropylene particle, iron powder, river sand, water, and an additive. The lightweight concrete possesses excellent electromagnetic shielding effects, and electromagnetic shielding effect on 500MHz electromagnetic signals is as high as 50dB; the lightweight concrete also possesses excellent mechanical properties, corrosion resistance, and mould resistance; and application prospect is promising.

Description

technical field [0001] The invention relates to a concrete and a preparation method thereof, in particular to a lightweight concrete with electromagnetic shielding function and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, a large number of electronic devices have entered the family, and the problem of electromagnetic radiation has also attracted increasing attention. Concrete is the most widely used building material in engineering, and it is also the main structural material. In building materials, people often do not pay too much attention to its electromagnetic shielding effect in order to reduce costs. Ordinary concrete has a certain shielding function for high-frequency electromagnetic waves mainly by reflection and absorption, but the shielding effect is not good. Only after adding electromagnetic loss substances to it can it have a higher shielding function. The method in the prior art is to add me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/38C04B16/08C04B14/34
Inventor 余雪军
Owner 清远肆柒柒新材料科技有限公司
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