CN102627436A - Pumice concrete with the function of electromagnetic wave absorption, and preparation method thereof - Google Patents
Pumice concrete with the function of electromagnetic wave absorption, and preparation method thereof Download PDFInfo
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- CN102627436A CN102627436A CN2012101191276A CN201210119127A CN102627436A CN 102627436 A CN102627436 A CN 102627436A CN 2012101191276 A CN2012101191276 A CN 2012101191276A CN 201210119127 A CN201210119127 A CN 201210119127A CN 102627436 A CN102627436 A CN 102627436A
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- pumice
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- cement
- electromagnetic wave
- pumice concrete
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- 239000008262 pumice Substances 0.000 title claims abstract description 62
- 239000004567 concrete Substances 0.000 title claims abstract description 60
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000006229 carbon black Substances 0.000 claims abstract description 10
- 239000011398 Portland cement Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000004568 cement Substances 0.000 claims description 29
- 239000006096 absorbing agent Substances 0.000 claims description 26
- 239000003638 chemical reducing agent Substances 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 229940087654 iron carbonyl Drugs 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 150000002790 naphthalenes Chemical class 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 239000011358 absorbing material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002745 absorbent Effects 0.000 abstract description 2
- 239000002250 absorbent Substances 0.000 abstract description 2
- 238000002310 reflectometry Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000003469 silicate cement Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920002748 Basalt fiber Polymers 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 241000872198 Serjania polyphylla Species 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- -1 silit Chemical compound 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
Images
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 fine aggregate. 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
The invention belongs to the wave-absorbing material applied to buildings technical field, relate to a kind of pumice concrete material and preparation method thereof with electromagnetic wave absorption function.
Background technology
Along with the continuous aggravation of electromagnetic pollution and the enhancing of people's environmental consciousness, absorb the microwave material of construction and more and more receive people's attention.At present, it is used and has related to many fields such as electromagnetic compatibility, computer security, anti-electromagnetic radiation and military affairs.Inhaling the wave building material mainly contains the composite wave-absorbing material of construction, inhales the wave building coating and inhales ripple watt, inhales ripple wall tile etc.
The research and development of wave absorbing agent are depended in the development of wave-absorbing material applied to buildings, and the present wave absorbing agent that adopts mainly is still carbon powder, graphite, silit, barium titanate, ferrite, stupalith, nano material etc.Like publication number is the disclosed a kind of electromagnetic wave absorption material of Chinese invention patent prospectus of CN 1862709A, by weight percent is that N13AL.1-6% nano oxidized of 20-60% admired, the unsaturated polyester vinegar of 3-10% nano silicon oxide and surplus forms; The absorbing material of suchlike ferrite, stupalith, nano material costs an arm and a leg, because building field is huge to the consumption of material, therefore can raise the cost greatly, can not promote the use at present; And for example publication number is the disclosed a kind of Wave absorbing cement concrete material of Chinese invention patent prospectus of CN1974468A; With the cement concrete is base material; Wherein be distributed with bubble and acetylene carbon black or graphite, bubble in this absorbing material and acetylene carbon black or graphite can impact the performances such as intensity of material of construction itself.
The existing representative art document in this area comprises:
Chinese patent, " Wave absorbing cement concrete material and preparation method thereof ", the patent No.: 200610098349.9; This invention proposes a kind of coagulating cement soil type absorbing material and preparation method thereof.Be to be base material, and be distributed with bubble in the concrete with the cement concrete.Through disperseing inorganic absorbent, will joining in the cement through the dispersive absorption agent and stir, add again the cement bubble, add steps such as Hardenfast, moulding, the demoulding and make a kind of Wave absorbing cement concrete material of easy construction.Chinese patent, " a kind of high-iron ground steel slag lightweight high-toughness wave absorption concrete and preparation method thereof " patent No.: 2010102669520; This invention has proposed a kind of wave absorption concrete and preparation method thereof.This concrete is prepared from silicate cement, flyash and high ferro ground steel slag, pottery sand and high efficiency water reducing agent, basalt fibre and water, each proportion of raw materials (kg/m
3) be: silicate cement: 110～300, flyash: 80～120, the high ferro ground steel slag: 70～140, pottery sand: 600～1500, high efficiency water reducing agent: 3.0～4.5, basalt fibre 30～50, water: 150～180.No matter be these two kinds listed or other wave absorption concretes of invention, the wave absorption concrete that it provided all exists complex manufacturing technology, made volume of concrete density big, the absorption of electromagnetic wave frequency range is narrow wait not enough.
As structure material, inhale the wave building material and have the big characteristics of usage quantity, so the inevitable requirement cost is low.Existing absorbing material all exists price high, and quality is big, and wave absorbing agent also has disadvantageous effect to the performance of cement-based material own.
Pumice concrete is the light skeletal pumice concrete; Its radar absorption characteristic realizes through two aspects: on the one hand; Use the absorption agent carbon black to regulate the specific inductivity of cement stone in the pumice concrete, make itself and air impedance matching, can absorb a part of hertzian wave.On the other hand, when hertzian wave incided on the pumice aggregate, because the porousness of pumice aggregate, a part of hertzian wave incided in the middle of the hole of pumice aggregate, on hole wall, carries out repeatedly reflection and scattering, makes incident electromagnetic wave be absorbed.
Summary of the invention
For addressing the above problem, the invention provides the pumice concrete absorbing material of a kind of lightweight, cheapness, can be widely used in the various dual-use buildings that are in the electromagenetic wave radiation environment for a long time.
Technical scheme of the present invention is following:
A kind of pumice concrete with electromagnetic wave absorption function is to be the pumice concrete that concrete coarse aggregate is processed with the float stone, it is characterized in that comprise dry material and water, dry material comprises cement, pumice aggregate, sand, wave absorbing agent, and natural pumice is as pumice aggregate.The weight ratio of cement, water, sand, pumice aggregate, wave absorbing agent is 1: 0.40～0.50: 1.50～2.00: 0.50～1.00: 0.01～0.02, and optimum weight ratio is 1: 0.43: 1.60: 0.98: 0.01.
Further characteristic, described wave absorbing agent can or have the wave absorbing agent of similar features for carbon black, iron carbonyl.
Further characteristic, the porosity of pumice aggregate is more than 70%, and pore size distribution is between 7 μ m-140 μ m, and float stone self ultimate compression strength is greater than 4MPa.
Further characteristic, described cement can adopt general purpose portland cement.
Further characteristic, above-mentioned pumice concrete also comprises water reducer, described water reducer is the naphthalene series high-efficiency water-reducing agent of pulvis, aqua, or the polycarboxylic acid series high efficiency water reducing agent of pulvis, aqua.
The preparation method of pumice concrete absorbing material of the present invention may further comprise the steps:
(1) wave absorbing agent is joined in the cement;
(2) sand is added stirrer and cement, wave absorbing agent add stirring together;
(3) the saturated back of pumice aggregate suction adds stirring together in the stirrer;
(4) adding entry mixes;
(5) moulding: the material after will stirring injects mould, moulding;
(6) demoulding: the demoulding becomes the suction ripple pumice concrete product of net shape.
On above-mentioned preparing method's basis, when using high efficiency water reducing agent, the pulvis water reducer adds with cement mixing when adding the pulvis water reducer, aqua water reducer and the water adding that is mixed when adding the aqua water reducer.
Compared with prior art, the invention has the beneficial effects as follows:
(1) adopt natural pumice as coarse aggregate, wide material sources, cheap, be fit to large-scale engineering applications.
(2) because float stone has natural pore texture, and apparent density is lower, institute's concrete batching density is low, heat-insulating property, weather resistance are good.
(3) cement-base composite wave-absorbing material production technique of the present invention is simple, does not need specific equipment, and with portland cement concrete material basically identical, material source is extensive, and the finished product price is low, can realize industrialization production.
(4) pumice concrete of electromagnetic wave absorption function of the present invention, basic proportioning is tested at 2-18GHz, and minimum reflectance reaches-25dB, reaches 10GHz greater than the bandwidth of-7dB.Those skilled in the art can be through adjusting the pumice concrete absorbing material of the present invention that proportioning and wave absorbing agent kind and volume obtain different performance.
(5) can do cast-in-situ wall, roof with this product, also can process concrete product, like wallboard, building block, roof boarding etc., wave-absorbing effect is good.
Description of drawings
Accompanying drawing is the pumice concrete absorbing property figure that the present invention tests.
Among the figure:
A is the absorbing property test curve of the wave absorption concrete of embodiment 1 preparation;
The absorbing property test curve of the wave absorption concrete of B embodiment 2 preparations;
The absorbing property test curve of the wave absorption concrete of C embodiment 3 preparations;
Embodiment
Be described in detail embodiments of the invention below in conjunction with technical scheme and accompanying drawing.
Embodiment 1
In the present embodiment, the weight ratio of cement, water, sand, coarse aggregate, wave absorbing agent is 1: 0.43: 1.60: 0.98: 0.01: 0.015
Prepare by following technology:
(1) with carbon black as wave absorbing agent, wave absorbing agent is distributed in the ordinary Portland cement;
(2) sand is added stirrer and cement, wave absorbing agent add stirring together;
(3) the saturated back of pumice aggregate suction adds stirring together in the stirrer;
(4) add entry separately;
(5) moulding: the material after will stirring injects mould, moulding;
(6) demoulding: the demoulding becomes the suction ripple pumice concrete product of net shape.
The absorbing material that present embodiment is made carries out the absorbing property test, and the result is shown in A in the accompanying drawing.
In the present embodiment, each raw material weight proportioning is following:
The basic proportioning of pumice concrete with electromagnetic wave absorption function is: cement: water: sand: pumice aggregate: carbon black: high-efficiency water-reducing agent of poly-carboxylic acid (aqua)=1: 0.43: 1.60: 0.70: 0.01: 0.02.
Prepare by following technology:
(1) with iron carbonyl as wave absorbing agent, wave absorbing agent is distributed in the ordinary Portland cement;
(2) sand is added stirrer and cement, wave absorbing agent add stirring together;
(3) the saturated back of pumice aggregate suction adds stirring together in the stirrer;
(4) add the mixing of entry and high-efficiency water-reducing agent of poly-carboxylic acid;
(5) moulding: the material after will stirring injects mould, moulding;
(6) demoulding: the demoulding becomes the suction ripple pumice concrete product of net shape.
The absorbing material that present embodiment is made carries out the absorbing property test, and the result is shown in B in the accompanying drawing.
Embodiment 3
In the present embodiment, each raw material weight proportioning is following:
The basic proportioning of pumice concrete with electromagnetic wave absorption function is: cement: water: sand: pumice aggregate: carbon black: naphthalene series high-efficiency water-reducing agent (pulvis)=1: 0.43: 1.60: 0.52: 0.01: 0.015.
Prepare by following technology:
(1) mixes as wave absorbing agent with carbon black with iron carbonyl, wave absorbing agent and naphthalene series high-efficiency water-reducing agent are distributed in the silicate cement;
(2) sand is added stirrer and cement, wave absorbing agent add stirring together;
(3) the saturated back of pumice aggregate suction adds stirring together in the stirrer;
(4) add entry separately;
(5) moulding: the material after will stirring injects mould, moulding;
(6) demoulding: the demoulding becomes the suction ripple pumice concrete product of net shape.
The high absorbing material that present embodiment is made carries out the absorbing property test, and the result is shown in C in the accompanying drawing.
Claims (8)
1. pumice concrete with electromagnetic wave absorption function; Be to be the pumice concrete that concrete coarse aggregate is processed with the float stone; It is characterized in that: this pumice concrete comprises dry material and water, and dry material comprises cement, pumice aggregate, sand, wave absorbing agent, and natural pumice is as pumice aggregate; The weight ratio of cement, water, sand, pumice aggregate, wave absorbing agent is 1: 0.40～0.50: 1.50～2.00: 0.50～1.00: 0.01～0.02.
2. the pumice concrete with electromagnetic wave absorption function as claimed in claim 1 is characterized in that: the weight ratio of described cement, water, sand, natural pumice, wave absorbing agent is 1: 0.43: 1.60: 0.98: 0.01.
3. the pumice concrete with electromagnetic wave absorption function as claimed in claim 1 is characterized in that: the porosity of natural pumice is more than 70%, and pore size distribution is between 7 μ m-140 μ m, and float stone self ultimate compression strength is greater than 4Mpa.
4. the pumice concrete with electromagnetic wave absorption function as claimed in claim 1 is characterized in that: described wave absorbing agent is carbon black or iron carbonyl.
5. the pumice concrete with electromagnetic wave absorption function as claimed in claim 1 is characterized in that: described cement adopts general purpose portland cement.
6. like the arbitrary described pumice concrete with electromagnetic wave absorption function of claim 1-5, it is characterized in that: above-mentioned pumice concrete also comprises water reducer, and described water reducer is the naphthalene series high-efficiency water-reducing agent of pulvis, aqua; Or the polycarboxylic acid series high efficiency water reducing agent of pulvis, aqua.
7. the arbitrary described preparation method with pumice concrete of electromagnetic wave absorption function of claim 1-5, its characteristic comprises the steps:
(1) wave absorbing agent is joined in the cement;
(2) sand is added stirrer and cement, wave absorbing agent add stirring together;
(3) the saturated back of pumice aggregate suction adds stirring together in the stirrer;
(4) adding entry mixes;
(5) moulding: the material after will stirring injects mould, moulding;
(6) demoulding: the demoulding becomes the suction ripple pumice concrete product of net shape.
8. the described preparation method with pumice concrete of electromagnetic wave absorption function of claim 6 is characterized in that, on claim 6 preparing method's basis, adds water reducer, when adding the pulvis water reducer, and pulvis water reducer and cement mixing; When adding the aqua water reducer, the adding that is mixed of aqua water reducer and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201210119127 CN102627436B (en) | 2012-04-20 | 2012-04-20 | Pumice concrete with the function of electromagnetic wave absorption, and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210119127 CN102627436B (en) | 2012-04-20 | 2012-04-20 | Pumice concrete with the function of electromagnetic wave absorption, and preparation method thereof |
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| CN102627436A true CN102627436A (en) | 2012-08-08 |
| CN102627436B CN102627436B (en) | 2013-06-19 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103030354A (en) * | 2012-12-05 | 2013-04-10 | 王建友 | Cement and lava composite concrete manufacturing method |
| CN104628330A (en) * | 2013-11-11 | 2015-05-20 | 北京华宇新奥科技有限责任公司 | Electromagnetic wave-absorbing ceramsite concrete |
| CN104628421A (en) * | 2015-01-27 | 2015-05-20 | 济南大学 | Surface wave-absorbing modification technology for cement and concrete |
| CN106082799A (en) * | 2016-06-08 | 2016-11-09 | 福建江夏学院 | A kind of anti-crack concrete with anti-electromagnetic radiation and preparation method thereof |
| CN106278001A (en) * | 2015-06-01 | 2017-01-04 | 武汉理工大学 | A kind of electromagnetic wave absorption concrete and preparation method thereof |
| CN109133783A (en) * | 2018-08-30 | 2019-01-04 | 河北建筑工程学院 | A kind of slag micropowder float stone lightweight aggregate concrete and preparation method thereof |
| CN109231911A (en) * | 2018-09-17 | 2019-01-18 | 吉林建筑大学 | A kind of scoria electromagnetic wave shielding concrete and preparation method thereof |
| CN111807772A (en) * | 2020-07-14 | 2020-10-23 | 李焕醒 | Pumice concrete with electromagnetic wave absorption function and preparation method thereof |
| CN113754370A (en) * | 2021-08-26 | 2021-12-07 | 北京工业大学 | Preparation method of electromagnetic wave-transparent concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1844025A (en) * | 2006-04-20 | 2006-10-11 | 武汉理工大学 | Electro-conductive concrete with nano charcoal black |
| CN1974468A (en) * | 2006-12-12 | 2007-06-06 | 南京南大波平电子信息有限公司 | Wave absorbing cement concrete material and its prepn process |
-
2012
- 2012-04-20 CN CN 201210119127 patent/CN102627436B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1844025A (en) * | 2006-04-20 | 2006-10-11 | 武汉理工大学 | Electro-conductive concrete with nano charcoal black |
| CN1974468A (en) * | 2006-12-12 | 2007-06-06 | 南京南大波平电子信息有限公司 | Wave absorbing cement concrete material and its prepn process |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103030354A (en) * | 2012-12-05 | 2013-04-10 | 王建友 | Cement and lava composite concrete manufacturing method |
| CN103030354B (en) * | 2012-12-05 | 2014-07-30 | 王建友 | Cement and lava composite concrete manufacturing method |
| CN104628330A (en) * | 2013-11-11 | 2015-05-20 | 北京华宇新奥科技有限责任公司 | Electromagnetic wave-absorbing ceramsite concrete |
| CN104628330B (en) * | 2013-11-11 | 2017-08-25 | 北京华宇新奥科技有限责任公司 | Electromagnetic wave absorption haydite concrete |
| CN104628421A (en) * | 2015-01-27 | 2015-05-20 | 济南大学 | Surface wave-absorbing modification technology for cement and concrete |
| CN104628421B (en) * | 2015-01-27 | 2016-09-07 | 济南大学 | Wavefront modifier technology is inhaled on the surface of a kind of cement and concrete |
| CN106278001A (en) * | 2015-06-01 | 2017-01-04 | 武汉理工大学 | A kind of electromagnetic wave absorption concrete and preparation method thereof |
| CN106278001B (en) * | 2015-06-01 | 2018-03-20 | 武汉理工大学 | A kind of electromagnetic wave absorption concrete and preparation method thereof |
| CN106082799A (en) * | 2016-06-08 | 2016-11-09 | 福建江夏学院 | A kind of anti-crack concrete with anti-electromagnetic radiation and preparation method thereof |
| CN109133783A (en) * | 2018-08-30 | 2019-01-04 | 河北建筑工程学院 | A kind of slag micropowder float stone lightweight aggregate concrete and preparation method thereof |
| CN109231911A (en) * | 2018-09-17 | 2019-01-18 | 吉林建筑大学 | A kind of scoria electromagnetic wave shielding concrete and preparation method thereof |
| CN109231911B (en) * | 2018-09-17 | 2021-03-16 | 吉林建筑大学 | Volcanic slag electromagnetic wave shielding concrete and preparation method thereof |
| CN111807772A (en) * | 2020-07-14 | 2020-10-23 | 李焕醒 | Pumice concrete with electromagnetic wave absorption function and preparation method thereof |
| CN113754370A (en) * | 2021-08-26 | 2021-12-07 | 北京工业大学 | Preparation method of electromagnetic wave-transparent concrete |
| CN113754370B (en) * | 2021-08-26 | 2023-01-03 | 北京工业大学 | Preparation method of electromagnetic wave-transparent concrete |
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| CN102627436B (en) | 2013-06-19 |
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