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Pumice wave absorbing aggregate with electromagnetic wave absorbing function and preparation method of pumice wave absorbing aggregate

An electromagnetic wave and pumice technology, applied in the fields of natural pumice absorbing aggregate and its preparation, light aggregate and its preparation, can solve the problems of low strength, high water absorption of pumice aggregate, uneven dispersion of wave absorbing agent, etc. The effect of low finished product price, good absorbing performance and low price

Active Publication Date: 2012-08-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of uneven dispersion of the wave absorbing agent caused by directly adding the wave absorbing agent to the concrete material in the preparation of the existing concrete wave absorbing material, the present invention provides a natural pumice wave absorbing aggregate and a preparation method thereof, which solves the problem of Pumice aggregate has high water absorption rate, low strength and uneven dispersion of wave absorbing agent in concrete

Method used

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  • Pumice wave absorbing aggregate with electromagnetic wave absorbing function and preparation method of pumice wave absorbing aggregate
  • Pumice wave absorbing aggregate with electromagnetic wave absorbing function and preparation method of pumice wave absorbing aggregate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this embodiment, the weight ratio of cement and wave-absorbing agent is 90:10, and the wave-absorbing pumice aggregate is prepared according to the invention. According to GB / T17431.1-2010 "Light Aggregate and Its Test Method Light Aggregate Test Method", the bulk density, apparent density, cylinder compressive strength and water absorption of the aggregate are tested. The test results are as follows:

[0022] project

Bulk density, kg / m 3

Apparent density, kg / m 3

Cylinder compressive strength, MPa

Water absorption, %

Test Results

480

820

2.5

12.1

[0023] According to the weight ratio of cement, water, river sand, and wave-absorbing pumice aggregate of 1:0.50:1.6:1.0, light-weight aggregate wave-absorbing concrete was prepared, and a specimen with a size of 200mm*200mm*25mm was made. The absorbing concrete specimen was tested for absorbing performance, and the results are shown in the following tabl...

Embodiment 2

[0026] In this embodiment, the weight ratio of cement and wave-absorbing agent is 95:5, and the wave-absorbing pumice aggregate is prepared according to the invention. According to GB / T17431.1-2010 "Light Aggregate and Its Test Method Light Aggregate Test Method", the bulk density, apparent density, cylinder compressive strength and water absorption of the aggregate are tested. The test results are as follows:

[0027] project

Bulk density, kg / m 3

Apparent density, kg / m 3

Cylinder compressive strength, MPa

Water absorption, %

Test Results

490

830

2.2

13.8

[0028] The weight ratio of cement, water, expanded perlite, and wave-absorbing pumice aggregate is 1:0.50:0.10:1.5 to prepare lightweight aggregate wave-absorbing concrete, and make a specimen with a size of 200mm*200mm*25mm. The absorbing concrete specimen was tested for absorbing performance, and the results are shown in the following table:

[0029] ...

Embodiment 3

[0031] In this embodiment, the weight ratio of cement and wave-absorbing agent is 80:20, and the wave-absorbing pumice aggregate is prepared according to the invention. According to GB / T17431.1-2010 "Light Aggregate and Its Test Method Light Aggregate Test Method", the bulk density, apparent density, cylinder compressive strength and water absorption of the aggregate are tested. The test results are as follows:

[0032] project

Bulk density, kg / m 3

Apparent density, kg / m 3

Cylinder compressive strength, MPa

Water absorption, %

Test Results

490

820

2.3

11.6

[0033] According to the weight ratio of cement, water, river sand, and wave-absorbing pumice aggregate of 1:0.50:1.6:1.0, light-weight aggregate wave-absorbing concrete was prepared, and a specimen with a size of 200mm*200mm*25mm was made. The absorbing concrete specimen was tested for absorbing performance, and the results are shown in the following tabl...

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Abstract

The invention relates to pumice wave absorbing aggregate with an electromagnetic wave absorbing function and a preparation method of the pumice wave absorbing aggregate, belonging to the technical field of building wave absorbing materials. The pumice wave absorbing aggregate is characterized in that the surface of natural pumice is covered by a wave absorbing layer, the wave absorbing layer comprises dry materials and water and the dry materials comprise cement and wave absorbing agent; and the ratio of cement to wave absorbing agent is (80 to 95):(20 to 5). The pumice wave absorbing aggregate with the electromagnetic wave absorbing function and the preparation method of the pumice wave absorbing aggregate have the advantages that the problems that the water absorbing capacity of the natural pumice aggregate is high, the strength is not high, the wave absorbing agent is not evenly dispersed in concrete and the like are solved, the source of raw materials is wide, the process is simple, and the pumice wave absorbing aggregate can be used for constructing cast-in-situ wall bodies and roofs, can also be used for making concrete products such as wall boards, building blocks, roof boards and the like, has good heat insulating and wave absorbing performance and is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the cross technical field of building material science and electromagnetic science. The invention relates to a lightweight aggregate with electromagnetic wave absorption function and a preparation method thereof, in particular to a natural pumice wave-absorbing aggregate and a preparation method thereof. Background technique [0002] In order to achieve the stealth of buildings and reduce the hazards of electromagnetic waves, attention to absorbing building materials has become a hot research topic today. At present, most of the research on concrete absorbing materials at home and abroad focuses on adding metal powder, ferrite, fiber, carbon powder, whiskers and other materials to ordinary concrete. Although it can improve its absorbing performance, it also reduces the The matching degree of spatial wave impedance, and the wave-absorbing agent is difficult to disperse evenly in the concrete due to the fine particles, resulting...

Claims

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Application Information

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IPC IPC(8): C04B14/14
Inventor 吕兴军曹明莉
Owner DALIAN UNIV OF TECH
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