CN101386507A - Electromagnetic control cement mortar material and preparation method thereof - Google Patents
Electromagnetic control cement mortar material and preparation method thereof Download PDFInfo
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- CN101386507A CN101386507A CNA2008101550484A CN200810155048A CN101386507A CN 101386507 A CN101386507 A CN 101386507A CN A2008101550484 A CNA2008101550484 A CN A2008101550484A CN 200810155048 A CN200810155048 A CN 200810155048A CN 101386507 A CN101386507 A CN 101386507A
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- cement mortar
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- electromagnetic control
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- 239000011083 cement mortar Substances 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 10
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 11
- 239000010962 carbon steel Substances 0.000 claims description 11
- 239000011509 cement plaster Substances 0.000 claims description 10
- 239000003469 silicate cement Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005056 compaction Methods 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000002310 reflectometry Methods 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000001723 curing Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000005670 electromagnetic radiation Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0008—Materials specified by a shape not covered by C04B20/0016 - C04B20/0056, e.g. nanotubes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Nanotechnology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides an electromagnetic control cement mortar material, which comprises the following components: cement, standard sand and wavy deformed steel fibers. The preparation process of the electromagnetic control cement mortar material comprises the following steps: material preparation, mixing, molding, curing and maintenance. The electromagnetic control cement mortar material provided by the invention can well absorb electromagnetic waves within the frequency range of 2-10 GHz, the reflectivity within the frequency range of 2-10 GHz reaches the level of less than-5 dB, and the electromagnetic control cement mortar material can meet the electromagnetic control requirements of civil buildings.
Description
Technical field:
The present invention relates to a kind of electro-magnetism proof cement mortar material and preparation method thereof, it has good electromagnetic absorption performance in 2～10GHz, is applicable to the low frequency electromagnetic control in covil construction field.
Background technology:
Raising along with Chinese economic development and national life level, various modern electronicss are more and more universal, the electromagnetic radiation of radio and television equipment electromagnetic radiation, the electromagnetic radiation of communication navigation transmitter, industrial science and education medical treatment high-frequency apparatus electromagnetic radiation and traffic and transportation system electromagnetic radiation, high-voltage power system electromagnetic field and household microwave oven, refrigerator, TV or the like different frequency has spread all over the space of people's lives, the hertzian wave of different frequency mixes, form the stack of field intensity, brought serious harm for people's health and life.
In electromagnetism control cement material, the Electromagnetic Shielding Concrete material of studying often at present, the frequency of shielding and is mainly used in leakage and the outside electromagnetic interference that prevents electromagnetic signal mostly below 10GHz, and the hertzian wave that space radiation is propagated is difficult to realize effective attenuation by absorption.Present electromagnetic study on prevention mainly concentrates on high frequency band and main absorbing material is a ferrite, is applicable to that the cement mortar material of the low frequency electromagnetic control of civil area does not also have.In available coagulation soil, the concrete material that adds steel fiber has certain wave-absorbing effect in 2～18GHz range of frequency, the 4dB bandwidth reaches as high as 15.28GHz, maximum absorbance can reach 9.8dB, utilize this material to carry out the electromagnetism control at civil area and can play certain effect, but simultaneously because the use of steel fiber has increased laid down cost and difficulty greatly.
Summary of the invention:
The objective of the invention is for improve Electromagnetic Shielding Concrete in electromagnetism control deficiency and a kind of well behaved electro-magnetism proof cement mortar material is provided, another object of the present invention also provides the preparation method of above-mentioned materials.
Technical scheme of the present invention is: a kind of electro-magnetism proof cement mortar material, the mass fraction of its feed composition and each component is: 7～27 parts of the special-shaped carbon steel fibres of 100 parts of PII type silicate cements, 250～350 parts of standard sands, 45～55 parts in water and waviness.
Wherein said PII type silicate cement is No. 425 or No. 525 ordinary Portland cements.
The special-shaped carbon steel fibre purity of wherein said waviness is 98～100%, and the impurity percentage composition is 0～2.0%, and length is between 10～40mm, and length-to-diameter ratio is 25～35.
The present invention also provides the preparation method of above-mentioned electro-magnetism proof cement mortar material to be, its concrete steps are as follows: according to mass fraction weighing silicate cement, standard sand, deformed steel fiber and the water of each component in the feed composition, in cement plaster blender, stir automatically, after pouring the slurry that mixes into mould and vibratory compaction, wet curing obtains electro-magnetism proof cement mortar material.
Stir 30～90s in the above-mentioned cement plaster blender, the wet curing temperature is 20～35 ℃, 1～August of wet curing time.
The electromagnetism that the present invention obtains inhale the control cement mortar material in 2-10GHz scope internal reflection rate less than 5dB.
Beneficial effect:
The undaform carbon steel fibre sand-cement slurry of mixing provided by the invention is in the 2-10GHz scope, the ELECTROMAGNETIC REFLECTION rate of cement sand slurry is all less than 5dB, minimum reaches 12.7dB, and the ELECTROMAGNETIC REFLECTION rate surpasses 7.5GHz less than the bandwidth of 5dB, has satisfied the technical requirements of indoor electromagnetic protection.
Description of drawings:
Fig. 1 is the reflectance map of the prepared 10mm solid cement mortar of embodiment 1.
Fig. 2 is the reflectance map of the prepared 15mm solid cement mortar of embodiment 2.
Fig. 3 is the reflectance map of the prepared 20mm solid cement mortar of embodiment 3.
Fig. 4 is the reflectance map of the prepared 25mm solid cement mortar of embodiment 4.
Fig. 5 is the reflectance map of the prepared 25mm solid cement mortar of embodiment 5.
Fig. 6 is the reflectance map of the prepared 30mm solid cement mortar of embodiment 6.
Concrete enforcement:
Provide some embodiments of the present invention below:
Embodiment 1: in No. 425 silicate cement (the PII types of 1000g, Chinese cement factory) (length-to-diameter ratio is 30 to add the water of 3000g standard sand, 500ml and the long undaform carbon steel fibre of 15mm of 160g in, Jiaxing City longitude and latitude steel fiber company limited produces, purity is greater than 99%), in cement plaster blender, stirred automatically 60 seconds, pouring the slurry that mixes into thickness is in the 10mm mould and vibratory compaction, normal temperature maintenance 240 days.Carry out the test of electromagnetic performance in 2～10GHz range of frequency, except 2.44～2.80GHz and two band limits of 5.28～6.24GHz, all less than-5dB, minimum reaches-12.7dB the reflectivity at all frequency places.As shown in Figure 1.
Embodiment 2: (PII type in No. 425 silicate cements of 1000g, Chinese cement factory) (length-to-diameter ratio is 28 to add the water of 2500g standard sand, 550ml and the long undaform carbon steel fibre of 15mm of 140g, Jiaxing City longitude and latitude steel fiber company limited produces), in cement plaster blender, stirred automatically 50 seconds, pouring the slurry that mixes into thickness is in the 15mm mould and vibratory compaction, normal temperature maintenance 240 days.Carry out the test of electromagnetic performance in 2～10GHz range of frequency, the reflectivity at institute frequency place is all less than-5dB, minimum reaching-7.68dB.As shown in Figure 2.
Embodiment 3: in No. 525 cement (the PII types of 1000g, Chinese cement factory) (length-to-diameter ratio is 30 to add the water of 3500g standard sand, 550ml and the long undaform carbon steel fibre of 30mm of 140g in, Jiaxing City longitude and latitude steel fiber company limited produces), in cement plaster blender, stirred automatically 60 seconds, pouring the slurry that mixes into thickness is in the 20mm mould and vibratory compaction, normal temperature maintenance 210 days.Carry out the test of electromagnetic performance in 2～10GHz range of frequency, the reflectivity at institute frequency place is all less than-5dB, minimum reaching-12.3dB.As shown in Figure 3.
Embodiment 4: add the water of 2800g standard sand, 500ml and the long undaform carbon steel fibre (production of Jiaxing City longitude and latitude steel fiber company limited) of 30mm of 152g in No. 525 cement of 1000g, in cement plaster blender, stirred automatically 60 seconds, pouring the slurry that mixes into thickness is in the 25mm mould and vibratory compaction, normal temperature maintenance 240 days.Carry out the test of electromagnetic performance in 2～10GHz range of frequency, the reflectivity at institute frequency place is all less than-5.2dB, minimum reaching-9.1dB.As shown in Figure 4.
Embodiment 5: in No. 425 silicate cement (the PII types of 450g, Chinese cement factory) (length-to-diameter ratio is 28 to add the water of 1350g standard sand, 225ml and the long undaform carbon steel fibre of 15mm of 36g in, Jiaxing City longitude and latitude steel fiber company limited produces), in cement plaster blender, stirred automatically 60 seconds, pouring the slurry that mixes into thickness is in the 25mm mould and vibratory compaction, normal temperature maintenance 240 days.Carry out the test of electromagnetic performance in 2～10GHz range of frequency, the reflectivity at institute frequency place is all less than-5.1dB, minimum reaching-7.5dB.As shown in Figure 5.
Embodiment 6: in No. 425 silicate cement (the PII types of 450g, Chinese cement factory) (length-to-diameter ratio is 31 to add the water of 1300g standard sand, 230ml and the long undaform carbon steel fibre of 30mm of 110g in, Jiaxing City longitude and latitude steel fiber company limited produces), in cement plaster blender, stirred automatically 60 seconds, pouring the slurry that mixes into thickness is in the 30mm mould and vibratory compaction, normal temperature maintenance 210 days.Carry out the test of electromagnetic performance in 2～10GHz range of frequency, the reflectivity at institute frequency place is all less than-5.3dB, minimum reaching-8.9dB.As shown in Figure 6.
Claims (5)
1. electro-magnetism proof cement mortar material, the mass fraction of its feed composition and each component is: 7～27 parts of the special-shaped carbon steel fibres of 100 parts of PII type silicate cements, 250～350 parts of standard sands, 45～55 parts in water and waviness.
2. electro-magnetism proof cement mortar material according to claim 1 is characterized in that: used PII type silicate cement is No. 425 or No. 525 ordinary Portland cements.
3. electro-magnetism proof cement mortar material according to claim 1 is characterized in that: the purity of the special-shaped carbon steel fibre of used waviness is 98～100%, and the impurity percentage composition is 0～2.0%, and length is between 10～40mm, and length-to-diameter ratio is 25～35.
4. the preparation method of the described electro-magnetism proof cement mortar material of claim 1 is, its concrete steps are as follows: according to mass fraction weighing silicate cement, standard sand, deformed steel fiber and the water of each component in the feed composition, in cement plaster blender, stir automatically, after pouring the slurry that mixes into mould and vibratory compaction, wet curing obtains electro-magnetism proof cement mortar material.
5. method according to claim 4 is characterized in that stirring in the cement plaster blender 30～90s, and the wet curing temperature is 20～35 ℃, 1～August of wet curing time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101550484A CN101386507A (en) | 2008-10-27 | 2008-10-27 | Electromagnetic control cement mortar material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101550484A CN101386507A (en) | 2008-10-27 | 2008-10-27 | Electromagnetic control cement mortar material and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101386507A true CN101386507A (en) | 2009-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101550484A Pending CN101386507A (en) | 2008-10-27 | 2008-10-27 | Electromagnetic control cement mortar material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102432A (en) * | 2016-08-01 | 2016-11-09 | 江苏工程职业技术学院 | The method of mobile screened room pre-control building intelligence system electromagnetism Leibo interference |
| CN106278009A (en) * | 2016-07-22 | 2017-01-04 | 葛加君 | The method using the pre-control electromagnetism Leibo interference of conductive shield concrete |
| CN106278008A (en) * | 2016-07-22 | 2017-01-04 | 葛加君 | The method using the pre-control electromagnetism Leibo interference of steel reinforced concrete conductive fibre fabric |
| CN106278010A (en) * | 2016-07-22 | 2017-01-04 | 葛加君 | The method using the pre-control electromagnetism Leibo interference of conductive shield mortar |
-
2008
- 2008-10-27 CN CNA2008101550484A patent/CN101386507A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106278009A (en) * | 2016-07-22 | 2017-01-04 | 葛加君 | The method using the pre-control electromagnetism Leibo interference of conductive shield concrete |
| CN106278008A (en) * | 2016-07-22 | 2017-01-04 | 葛加君 | The method using the pre-control electromagnetism Leibo interference of steel reinforced concrete conductive fibre fabric |
| CN106278010A (en) * | 2016-07-22 | 2017-01-04 | 葛加君 | The method using the pre-control electromagnetism Leibo interference of conductive shield mortar |
| CN106278009B (en) * | 2016-07-22 | 2018-05-04 | 葛加君 | The method disturbed using the pre-control electromagnetism Leibo of conductive shield concrete |
| CN106278010B (en) * | 2016-07-22 | 2018-05-15 | 苏州嘉盛建设工程有限公司 | The method disturbed using the pre-control electromagnetism Leibo of conductive shield mortar |
| CN106102432A (en) * | 2016-08-01 | 2016-11-09 | 江苏工程职业技术学院 | The method of mobile screened room pre-control building intelligence system electromagnetism Leibo interference |
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Open date: 20090318 |