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Wave-absorbing cement admixture and application thereof

A technology of mixed materials and cement, which is applied in the field of wave-absorbing materials, can solve the problems of narrow frequency band and low absorption efficiency of wave-absorbing cement matrix, and achieve the effect of light heat preservation, improved wave-absorbing performance, and good compatibility

Inactive Publication Date: 2018-05-29
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of narrow frequency band and low absorption efficiency of the current wave-absorbing cement matrix, the present invention aims to provide a low-cost and high-performance wave-absorbing cement mixture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The wave-absorbing cement mixture includes cement, carbon black, water and granite waste rock powder absorbing spheres. The mass percentage of carbon black in the cement is 1.2%, and the volume filling rate of the granite waste rock powder absorbing spheres is 30%. Among them, the granite waste rock powder absorbing sphere is composed of the following components by weight fraction: 50% of granite waste rock powder, 20% of waste porcelain powder, 24% of red mud, and 6% of coal powder.

[0027] The preparation method of a cement-based wave-absorbing material provided in this embodiment is carried out according to the following steps:

[0028] (1) Mix the raw materials of the granite waste rock powder wave-absorbing sphere according to the weight ratio and mix them evenly to obtain a mixed material.

[0029] (2) Placing the mixed material in a granulator to granulate to form raw meal balls with a particle size of 1-15mm.

[0030] (3) Calcining the raw meal balls at 850° C...

Embodiment 2

[0035] The wave-absorbing cement mixture includes cement, metal powder, water and granite waste rock powder absorbing spheres. The mass percentage of metal powder in cement is 2%, and the volume filling rate of granite waste rock powder absorbing spheres is 50%. Among them, the granite waste rock powder absorbing sphere is composed of the following components by weight fraction: 80% of granite waste rock powder, 10% of waste porcelain powder, 5% of red mud, and 5% of coal powder.

[0036] The preparation method of a cement-based wave-absorbing material provided in this embodiment is carried out according to the following steps:

[0037] (1) Mix the raw materials of the granite waste rock powder wave-absorbing sphere according to the weight ratio and mix them evenly to obtain a mixed material.

[0038] (2) Placing the mixed material in a granulator to granulate to form raw meal balls with a particle size of 1-15mm.

[0039] (3) Calcining the raw meal balls at 1000° C. for 10 m...

Embodiment 3

[0044] The wave-absorbing cement mixture includes cement, graphite, water and granite waste rock powder absorbing spheres. The mass percentage of graphite in the cement is 3%, and the volume filling rate of the granite waste rock powder absorbing spheres is 40%. Among them, the granite waste rock powder absorbing sphere is composed of the following components by weight: 60% of granite waste rock powder, 18% of waste porcelain powder, 15% of red mud, and 7% of coal powder.

[0045] The preparation method of a cement-based wave-absorbing material provided in this embodiment is carried out according to the following steps:

[0046] (1) Mix the raw materials of the granite waste rock powder wave-absorbing sphere according to the weight ratio and mix them evenly to obtain a mixed material.

[0047] (2) Placing the mixed material in a granulator to granulate to form raw meal balls with a particle size of 1-15mm.

[0048] (3) Calcining the raw meal balls at 900° C. for 18 minutes to...

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Abstract

The invention provides a wave-absorbing cement admixture. The wave-absorbing cement admixture is prepared from cement, a wave-absorbing agent and resonance type wave-absorbing spheres, wherein the wave-absorbing spheres are prepared from porous ceramic microspheres by adhering to the wave-absorbing agent; waste granite powder is taken as a raw material of the porous ceramic microspheres. Accordingto the wave-absorbing cement admixture, the wave-absorbing agent accounts for 0.5%-3% of cement by mass, and volumetric filling rate of the resonance type wave-absorbing spheres is 30%-60%. The wave-absorbing components are introduced in two mixing modes of wave-absorbing powder and spheres, so that wave-absorbing performance of the cement-based material can be remarkably improved, and the problems of narrow frequency band, low absorbing efficiency and the like of single mechanical external mixing are solved; besides, the wave-absorbing spheres prepared from the waste granite powder are inorganic silicate materials and have good compatibility with the cement material. Meanwhile, the wave-absorbing spheres with high porosity can reduce mass of the cement-based material, and certain lightweight heat-insulation function is realized.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a wave-absorbing cement mixture and its application. Background technique [0002] With the rapid development of military high-tech, the detection, tracking, and attack capabilities of defense systems around the world are getting stronger and stronger. Fixed military buildings on the ground, such as command posts, radar stations, military airports, ammunition depots, etc., as the main command and logistics supply in the war, are more vulnerable to enemy military attacks. The application of architectural stealth absorbing materials can effectively avoid the exploration of enemy radars and achieve target stealth. At the same time, in order to resist electromagnetic environmental pollution and electromagnetic interference, the demand for absorbing materials in the field of civil construction is becoming more and more extensive. Cement-based materials a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/40
CPCC04B28/04C04B2111/00844C04B2111/40C04B2201/20C04B2201/50C04B14/022C04B18/12C04B18/027C04B18/0427C04B18/0409C04B14/34C04B24/2623C04B14/024C04B14/324
Inventor 黄世峰姜葱葱李国忠程新
Owner UNIV OF JINAN
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