Pumice concrete with the function of electromagnetic wave absorption, and preparation method thereof

A concrete and electromagnetic wave technology, which is applied in the field of building absorbing materials, can solve the problems of cement-based materials such as adverse effects on performance, high price, and high quality, and achieve the effects of good durability, low finished product price, and low density

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

The existing wave-absorbing materials are high in price and high in quality, and the wave-...

Method used

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  • Pumice concrete with the function of electromagnetic wave absorption, and preparation method thereof
  • Pumice concrete with the function of electromagnetic wave absorption, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, the weight ratio of cement, water, sand, coarse aggregate, and wave absorbing agent is 1:0.43:1.60:0.98:0.01:0.015

[0037] Prepare as follows:

[0038] (1) Use carbon black as a wave absorbing agent, and disperse the wave absorbing agent in ordinary Portland cement;

[0039] (2) Add the sand to the mixer and stir together with cement and wave absorbing agent;

[0040] (3) After the pumice aggregate is saturated with water, add it to the mixer and stir together;

[0041] (4) add water separately;

[0042] (5) Molding: inject the well-mixed material into the mold and form it;

[0043] (6) Demoulding: Demoulding becomes the wave-absorbing pumice concrete product in the final shape.

[0044] The microwave-absorbing performance test was carried out on the microwave-absorbing material prepared in this embodiment, and the results are shown in A in the accompanying drawing.

Embodiment 2

[0046] In the present embodiment, each raw material weight ratio is as follows:

[0047] The basic proportion of pumice concrete with electromagnetic wave absorption function is: cement: water: sand: pumice aggregate: carbon black: polycarboxylate superplasticizer (water agent) = 1: 0.43: 1.60: 0.70: 0.01: 0.02.

[0048] Prepare as follows:

[0049] (1) Use hydroxyl iron as a wave absorbing agent, and disperse the wave absorbing agent in ordinary Portland cement;

[0050] (2) Add the sand to the mixer and stir together with cement and wave absorbing agent;

[0051] (3) After the pumice aggregate is saturated with water, add it to the mixer and stir together;

[0052] (4) Add water and polycarboxylate high-efficiency water reducer to mix;

[0053] (5) Casting mold: inject the evenly stirred material into the mold and form it;

[0054] (6) Demoulding: Demoulding becomes the wave-absorbing pumice concrete product in the final shape.

[0055] The microwave-absorbing performan...

Embodiment 3

[0057] In the present embodiment, each raw material weight ratio is as follows:

[0058] The basic proportion of pumice concrete with electromagnetic wave absorption function is: cement: water: sand: pumice aggregate: carbon black: naphthalene superplasticizer (powder) = 1:0.43:1.60:0.52:0.01:0.015.

[0059] Prepare as follows:

[0060](1) Use hydroxyl iron and carbon black as a wave absorbing agent, and disperse the wave absorbing agent and naphthalene-based superplasticizer into Portland cement;

[0061] (2) Add the sand to the mixer and stir together with cement and wave absorbing agent;

[0062] (3) After the pumice aggregate is saturated with water, add it to the mixer and stir together;

[0063] (4) add water separately;

[0064] (5) Molding: inject the well-mixed material into the mold and form it;

[0065] (6) Demoulding: Demoulding becomes the wave-absorbing pumice concrete product in the final shape.

[0066] The microwave-absorbing performance of the high-absor...

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Abstract

The invention relates to pumice concrete with the function of electromagnetic wave absorption, which belongs to the technical field of building wave-absorbing materials and is characterized in that the pumice concrete uses pumice as a coarse aggregate and uses carbon black as an absorbent. The pumice concrete uses ordinary portland cement as a cementitious materials and uses medium sand as a fineaggregate. The prepared pumice concrete has a minimum reflectivity of -25 dB in the range of 2 to18 GHz. The pumice concrete provided by the invention is characterized in that production process is simple, material sources are widespread, product price is low and industrialized production can be realized; the pumice concrete can be used for cast-in-place wall and roof, and also can be made into concrete products, such as wallboard, blockroof slab and the like; and the pumice concrete has a great wave-absorbing effect and moderate intensity, and is suitable for promotion and use.

Description

technical field [0001] The invention belongs to the technical field of building wave-absorbing materials, and relates to a pumice concrete material with electromagnetic wave absorbing function and a preparation method thereof. Background technique [0002] With the continuous aggravation of electromagnetic pollution and the enhancement of people's awareness of environmental protection, people pay more and more attention to microwave-absorbing building materials. At present, its application has involved many fields such as electromagnetic compatibility, computer security, anti-electromagnetic radiation and military affairs. The wave-absorbing building materials mainly include composite wave-absorbing building materials, wave-absorbing building coatings, wave-absorbing tiles, and wave-absorbing wall tiles. [0003] The development of building absorbing materials depends on the research and development of absorbing agents. The absorbing agents currently used are mainly carbon ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/14
Inventor 曹明莉吕兴军李妍
Owner DALIAN UNIV OF TECH
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