CN106517946A - Wave-absorbing cement - Google Patents
Wave-absorbing cement Download PDFInfo
- Publication number
- CN106517946A CN106517946A CN201610990337.0A CN201610990337A CN106517946A CN 106517946 A CN106517946 A CN 106517946A CN 201610990337 A CN201610990337 A CN 201610990337A CN 106517946 A CN106517946 A CN 106517946A
- Authority
- CN
- China
- Prior art keywords
- eps
- cement
- expanded polystyrene
- wave
- absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- C04B28/04—Portland cements
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
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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
- 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
- C04B20/02—Treatment
-
- 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
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1033—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- 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
Abstract
The invention discloses a wave-absorbing cement. The wave-absorbing cement comprises expanded polystyrene and portland cement; the filling rate of expanded polystyrene ranges from 40 to 70vol%; and the particle diameter of expanded polystyrene ranges from 2 to 6mm. According to a preparation method, expanded polystyrene is doped into cement, so that wave absorbing performance of cement is improved.
Description
Technical field
A kind of the present invention relates to new material technology field, more particularly to suction ripple cement.
Background technology
Cement material is various composites for including Multimetal oxide, itself has certain absorbing property,
But cement material to the absorption of electromagnetic wave mainly by subscale electromagnetic consumable, absorbing property is than relatively low.In cement matrix
After adding traditional wave absorbing agent, although the absorbing property of cement material can be improved, greatly reduce and space natural impedance
Matching degree, therefore absorbing property raising degree is little.If adding wave transparent granule in cement matrix, although electromagnetic wave transparent material
Adding reduces the content of wave absorbing agent, but can be obviously improved the impedance matching of cement composite material, while wave transparent granule Jing
After cement mixing, its surface can be wrapped by one layer of cement layer, also can produce scattering and reflection to incident electromagnetic wave.When saturating
When the number of ripple granule is enough, the decay to incident electromagnetic wave is played by the multiple reflections and Multiple Scattering between each granule
The important effect of root.Simultaneously during the Multiple Scattering of electromagnetic wave, cement matrix itself also can produce certain to electromagnetic wave
It is lost, therefore the addition of wave transparent granule is expected to greatly improve the absorbing property of cement composite material.
Expanded polystyrene (EPS) (Expanded polystyrene, EPS) is a kind lightweight, includes the bubble of little continuous pore
The series of advantages such as foam, water suction firm low, acid and alkali-resistance low with density, good heat preservation performance, in industrial or agricultural, transportation and building
It has been used widely in the fields such as industry.But be applied to absorbing material field, there is not yet report.
The content of the invention
It is an object of the invention to propose a kind of suction ripple cement, the absorbing property for enabling to conventional cement is greatly improved.
It is that, up to this purpose, the present invention is employed the following technical solutions：
It is a kind of to inhale ripple cement, including expanded polystyrene (EPS) and portland cement, in the suction ripple cement, expanded polystyrene (EPS)
Filling rate be 40-70vol%, the particle diameter of expanded polystyrene (EPS) is 2-6mm.
Preferably, the expanded polystyrene (EPS) is modified through surface, and method of modifying is as follows：
(1) EPS surfaces are cleaned with inorganic solvent, is made EPS particle surface slightly solubles；
(2) high polymer binder PVA dilute with waters, pour the EPS granules and coupling agent for cleaning into after stirring；
(3) dipping obtains the modified expanded polystyrene (EPS) in the surface after drying.
It is as EPS surfaces are hydrophobicity, poor with the inorganic silicic acid salt cement compatibility, and EPS grain densities are especially little,
Easily float during with cement mixing and stirring, affect the uniformity of cement slurry, in order to strengthen EPS granules and cement slurry
Affinity, need to carry out pretreatment to EPS surfaces.Traditional method is to apply a layer binder in EPS particle surfaces, existing
Technology typically adopts epoxy latex or polyethylene propionate, and which can make EPS granule tables in the mixed process of EPS granules
Face is in a kind of tacky state, after cement slurry is added, can form one layer of cementitious coating in EPS particle surfaces, contribute to
Bonding between EPS granules and between EPS granules and cement matrix, but this method substantially increases EPS cementitious composite materials
The cost of manufacture of material.
Present invention employs a kind of brand-new handling process.First EPS surfaces are cleaned with inorganic solvent, EPS is made
Particle surface slightly soluble.With high polymer binder PVA dilute with waters, the EPS granules and coupling agent for cleaning after stirring, is poured into.
As the dissolving of EPS particle surfaces causes its surface roughness to increase, substantially increase the specific surface area of EPS granules, with
When binding agent mixes, the contact interface area between EPS granules and binding agent is just considerably increased, improve between the two is viscous
Knot performance.
Portland cement is to the decay of electromagnetic wave mainly by the metal-oxide in cement composition and some ore deposits
The dielectric loss of thing material and magnetic loss, absorbing property is than relatively low, and cement sample is dense, so as to cause the defeated of material
Enter natural impedance not matching that with free space natural impedance, the wave transparent performance of material is poor.EPS particle dielectric constants than relatively low,
Can be used as a kind of good electromagnetic wave transparent material.After it is added in portland cement, the pore of cement-base composite material can be adjusted
Rate and electromagnetic parameter, substantially increase the matching degree of composite impedance and space natural impedance.And at EPS granule Jing surfaces
After reason, preferably, after being sufficiently mixed with cement, its surface will be wrapped by one layer of cement layer for the compatibility with cement slurry, can be with
Scattered portion electromagnetic wave, therefore EPS filling concretes composite can be equivalent to a kind of closed pore absorbent structure.Work as incident electromagnetic wave
During into composite inner, multiple reflections and scattering will occur between each granule, so as to improve material on incident electricity
The loss and absorption of magnetic wave.
After adding EPS granules in cement, the absorbing property of sample is all improved.During addition 40vol%EPS, reflection is damaged
Consumption reaches -7～-10dB, and the absorbing property of sample increases with the increase of frequency, when frequency reaches 17.7GHz, sample
Reflection loss reached -10.02dB；After EPS filling rates reach 60vol%, absorbing property continues with the increase of frequency
Increase, after frequency is more than 12GHZ, the absorbing property of sample is better than -10dB, when frequency reaches 18GHz, inhales crossing property
- 15.27dB can be reached, a width of 6.2GHz of band better than -10dB, when EPS loadings continue to increase to 70%, material is absorbed
Suction is draped over one's shoulders performance and is declined on the contrary.
The present invention is doped and added to expanded polystyrene (EPS) in cement so that the absorbing property of cement strengthens.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
It is a kind of to inhale ripple cement, including expanded polystyrene (EPS) and portland cement, in the suction ripple cement, expanded polystyrene (EPS)
Filling rate be 40vol%, the particle diameter of expanded polystyrene (EPS) is 2mm.
Embodiment 2
It is a kind of to inhale ripple cement, including expanded polystyrene (EPS) and portland cement, in the suction ripple cement, expanded polystyrene (EPS)
Filling rate be 70vol%, the particle diameter of expanded polystyrene (EPS) is 6mm.
Embodiment 3
It is a kind of to inhale ripple cement, including expanded polystyrene (EPS) and portland cement, in the suction ripple cement, expanded polystyrene (EPS)
Filling rate be 50vol%, the particle diameter of expanded polystyrene (EPS) is 4mm.
Embodiment 4
It is a kind of to inhale ripple cement, including expanded polystyrene (EPS) and portland cement, in the suction ripple cement, expanded polystyrene (EPS)
Filling rate be 50vol%, the particle diameter of expanded polystyrene (EPS) is 4mm.
The expanded polystyrene (EPS) is modified through surface, and method of modifying is as follows：
(1) EPS surfaces are cleaned with inorganic solvent, is made EPS particle surface slightly solubles；
(2) high polymer binder PVA dilute with waters, pour the EPS granules and coupling agent for cleaning into after stirring；
(3) dipping obtains the modified expanded polystyrene (EPS) in the surface after drying.
The suction ripple cement of embodiment of the present invention 1-4, its wave-sucking performance reaches -10db, far above ordinary cement.
Claims (2)
1. it is a kind of to inhale ripple cement, including expanded polystyrene (EPS) and portland cement, in the suction ripple cement, expanded polystyrene (EPS)
Filling rate is 40-70vol%, and the particle diameter of expanded polystyrene (EPS) is 2-6mm.
2. it is as claimed in claim 1 to inhale ripple cement, it is characterised in that the expanded polystyrene (EPS) is modified through surface, it is modified
Method is as follows：
(1) EPS surfaces are cleaned with inorganic solvent, is made EPS particle surface slightly solubles；
(2) high polymer binder PVA dilute with waters, pour the EPS granules and coupling agent for cleaning into after stirring；
(3) dipping obtains the modified expanded polystyrene (EPS) in the surface after drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990337.0A CN106517946A (en) | 2016-11-10 | 2016-11-10 | Wave-absorbing cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990337.0A CN106517946A (en) | 2016-11-10 | 2016-11-10 | Wave-absorbing cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106517946A true CN106517946A (en) | 2017-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610990337.0A Pending CN106517946A (en) | 2016-11-10 | 2016-11-10 | Wave-absorbing cement |
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| CN (1) | CN106517946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115028470A (en) * | 2022-06-08 | 2022-09-09 | 电子科技大学 | Cement-based wave absorbing structure and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042005A (en) * | 2007-04-18 | 2007-09-26 | 大连理工大学 | Cement radical composite wave-suction material and preparation method thereof |
| CN101186474A (en) * | 2007-12-07 | 2008-05-28 | 东华理工大学 | Nano titanium oxide doped cement-base composite wave-absorbing material and preparation method thereof |
| CN102627422A (en) * | 2012-04-20 | 2012-08-08 | 大连理工大学 | Pumice wave absorbing aggregate with electromagnetic wave absorbing function and preparation method of pumice wave absorbing aggregate |
| CN105016676A (en) * | 2015-07-06 | 2015-11-04 | 济南大学 | Cement-based electromagnetic wave impedance matching material and preparation method therefor |
-
2016
- 2016-11-10 CN CN201610990337.0A patent/CN106517946A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042005A (en) * | 2007-04-18 | 2007-09-26 | 大连理工大学 | Cement radical composite wave-suction material and preparation method thereof |
| CN101186474A (en) * | 2007-12-07 | 2008-05-28 | 东华理工大学 | Nano titanium oxide doped cement-base composite wave-absorbing material and preparation method thereof |
| CN102627422A (en) * | 2012-04-20 | 2012-08-08 | 大连理工大学 | Pumice wave absorbing aggregate with electromagnetic wave absorbing function and preparation method of pumice wave absorbing aggregate |
| CN105016676A (en) * | 2015-07-06 | 2015-11-04 | 济南大学 | Cement-based electromagnetic wave impedance matching material and preparation method therefor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115028470A (en) * | 2022-06-08 | 2022-09-09 | 电子科技大学 | Cement-based wave absorbing structure and preparation method thereof |
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Application publication date: 20170322 |