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Carbon fiber-carbonyl iron compound modified wave-absorbing concrete and production method thereof

A composite modification and carbon fiber technology, applied in the field of functional materials, can solve the problems of small skin depth, reduced microwave absorption performance, low resistivity of carbonyl iron powder, etc., and achieve good microwave absorption performance, mechanical properties and good microwave absorption performance , The effect of simple molding process

Inactive Publication Date: 2019-08-16
ROCKET FORCE UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low resistivity of carbonyl iron powder, the skin depth in the microwave frequency band is very small, resulting in a decline in the absorption performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] A method for preparing carbon fiber-carbonyl iron composite modified wave-absorbing concrete provided by the invention comprises the following steps:

[0036] Step 1, in parts by mass, weigh 100-130 parts of water, 10-15 parts of carbon fiber-carbonyl iron nanocomposite absorbent, 300-400 parts of Portland cement, 500-600 parts of fine aggregate, 800 parts of gravel and 1.0-2.0 parts of water reducer;

[0037] Step 2, adding the weighed water reducer into water, stirring at room temperature until completely dissolved, and then use it to obtain an aqueous solution of the water reducer;

[0038] Step 3, put the carbon fiber-carbonyl iron nanocomposite absorbent, portland cement, fine aggregate and crushed stone weighed in step 1 into a high-speed mixer, and disperse at a speed of 100r / min for 30min to obtain a powder;

[0039] Step 4, put the powder obtained in step 3 into a mixer, slowly add the aqueous water reducer solution obtained in step 2 under stirring, and stir ...

Embodiment 1

[0042] A method for preparing carbon fiber-carbonyl iron composite modified wave-absorbing concrete provided by the invention comprises the following steps:

[0043] Step 1, in parts by mass, weigh 130g of water, 15g of carbon fiber-carbonyl iron nanocomposite absorbent, 400g of Portland cement, 500g of fine aggregate, 800g of crushed stone, 2.0g of water reducing agent, and set aside;

[0044] Step 2, select the water and the water reducer in step 1, add the water reducer to the water, stir at room temperature until completely dissolved and set aside for use to obtain an aqueous solution of the water reducer;

[0045]Step 3, put the carbon fiber-carbonyl iron nanocomposite absorbent, portland cement, fine aggregate and gravel in the above step 1 into a high-speed mixer, and disperse at a speed of 100r / min for 30min to obtain a powder;

[0046] Step 4, put the powder after high-speed mixing in step 3 into the mixer, slowly add the aqueous water reducer solution obtained in ste...

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Abstract

The invention provides carbon fiber-carbonyl iron compound modified wave-absorbing concrete and a production method thereof. The carbon fiber-carbonyl iron compound modified wave-absorbing concrete comprises the following raw materials of, in parts by mass, 100-130 parts of water, 10-15 parts of a carbon fiber-carbonyl iron nanometer compound absorbent produced on the basis of a production methodof the carbon fiber-carbonyl iron nanometer compound absorbent of claim 1, 300-400 parts of silicate cement, 500-600 parts of fine aggregate, 800 parts of aggregate and 1.0-2.0 parts of a water reducer. According to the concrete, not only can a microstructure of the concrete be improved to obtain excellent mechanical performance, but also outstanding wave-absorbing performance can be obtained, sothat the concrete has potential application values.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a carbon fiber-carbonyl iron composite modified wave-absorbing concrete and a preparation method thereof. Background technique [0002] At present, some electrical equipment will be disturbed by the surrounding electromagnetic environment during operation. In order to ensure the normal operation of electrical equipment, effective electromagnetic shielding measures are urgently needed. [0003] The existing carbon fiber and carbonyl iron are the two most commonly used electromagnetic wave absorbers. Carbon fiber is favored by researchers because of its excellent dielectric properties, low density characteristics and good mechanical properties. However, due to the fact that pure carbon fibers do not have magnetic properties, the matching performance is poor, and the wave-absorbing frequency band is narrow, which limits the improvement of its wave-absorbing performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B14/02C04B2103/302C04B22/02C04B22/00
Inventor 刘渊师金锋何祯鑫
Owner ROCKET FORCE UNIV OF ENG
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