CN105601325A - Method for enhancing performances of foam concrete by using PVDF (Polyvinylidene Fluoride) dispersion liquid - Google Patents
Method for enhancing performances of foam concrete by using PVDF (Polyvinylidene Fluoride) dispersion liquid Download PDFInfo
- Publication number
- CN105601325A CN105601325A CN201511000045.XA CN201511000045A CN105601325A CN 105601325 A CN105601325 A CN 105601325A CN 201511000045 A CN201511000045 A CN 201511000045A CN 105601325 A CN105601325 A CN 105601325A
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- CN
- China
- Prior art keywords
- foam concrete
- pvdf
- dispersion liquid
- sintering
- property
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- 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.)
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4838—Halogenated polymers
- C04B41/4842—Fluorine-containing polymers
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Building Environments (AREA)
Abstract
The invention relates to the technical field of building materials, and aims to provide a method for enhancing the performances of foam concrete by using PVDF (Polyvinylidene Fluoride) dispersion liquid. The method comprises the following steps: immersing the foam concrete to the PVDF dispersion liquid, soaking for 10 to 30 minutes and then taking out, and then sintering. The solid content of the PVDF dispersion liquid is less than or equal to 10 percent, and the grain diameter of the PVDF is less than or equal to 1 mu m. According to the method disclosed by the invention, the foam concrete is subjected to enhancement processing by using strong hydrophobic property of the PVDF, and then subjected to processes, such as soaking and sintering, such that the water absorptivity of the foam concrete can be effectively reduced, the saturated water absorptivity of the treated foam concrete is reduced by 50 to 90 percent compared with that of untreated foam concrete, and therefore the heat preservation property, the frost resistance property and the construction property of the foam concrete in the use process are improved. Compared with a conventional technology in which a water repellent is added in a preparation process of the foam concrete, the method cannot produce adverse affects on the performances, such as the compressive strength and the dry density of the foam concrete.
Description
Technical field
The invention belongs to building materials technology field, be specifically related to utilize the method for PVDF dispersion liquid reinforced foam concrete performance.
Background technology
Foam concrete has the advantages such as lightweight, heat-insulation and heat-preservation, fire prevention, easy construction, the feature of environmental protection be good, is widely used in and buildsBuild the engineering such as exterior-wall heat insulation, fire-blocking belt. But because it has compared with high water absorbing capacity, easily cause thermal conductivity factor to rise, protectTemperature hydraulic performance decline and surface are prone to the bad phenomenon such as cracking, hollowing while smearing mortar, therefore need foam concrete to carry outHydrophobic processing.
At present, the main method that is used for improving foam concrete hydrophobicity performance is to add and hate in foam concrete preparation processAqua, but can have a negative impact to performances such as foam concrete compression strength, dry densities, hydrophobicity performance increase is simultaneously alsoNot clearly.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, provides one to utilize PVDF dispersion liquidThe method of reinforced foam concrete performance.
For addressing the above problem, solution of the present invention is:
The method that provides one to utilize PVDF (Kynoar) dispersion liquid reinforced foam concrete performance is that foam is mixedSolidifying soil immerses in PVDF dispersion liquid, after dipping 10～30min, takes out, then through sintering; Described PVDF dispersion liquidSolid content≤10%, the particle diameter≤1 μ m of PVDF.
In the present invention, described sintering refers to: sintering 10～30min under 250～300 DEG C of conditions, naturally cools to chamberTemperature.
Compared with prior art, beneficial effect of the present invention is:
Can strengthen processing to foam concrete by the strong-hydrophobicity that utilizes Kynoar (PVDF), process dipping,The processes such as sintering, can effectively reduce foam concrete water absorption rate (the more untreated decline 50～90% of saturated water absorption),Thereby improve foam concrete heat-insulating property, anti-freezing property and workability in use. Steeping with routine techniquesIn foam concrete preparation process, add hydrophober and compare, the present invention can be to property such as foam concrete compression strength, dry densitiesCan have a negative impact.
Detailed description of the invention
In the present invention, PVDF dispersion liquid used is commercial product, requires solid content≤10% of PVDF dispersion liquid used,Particle diameter≤1 μ the m of PVDF, has no special requirements to other technical indicator, can in use become according to actual hydrophobicity performanceChange situation is selected its specific product model.
Embodiment 1
Foam concrete is immersed to (particle diameter 1 μ m, solid content 10%) in PVDF dispersion liquid, after 10min, take out 250 DEG CSintering 30min, naturally cools to room temperature. After testing, through strengthening the foam concrete of processing, its saturated water absorption is not moreProcess foam concrete and decline 50%.
Embodiment 2
Foam concrete is immersed to (particle diameter 0.5 μ m, solid content 8%) in PVDF dispersion liquid, after 30min, take out 300 DEG CSintering 10min, naturally cools to room temperature. After testing, through strengthening the foam concrete of processing, its saturated water absorption is not moreProcess foam concrete and decline 70%.
Embodiment 3
Foam concrete is immersed to (particle diameter 0.5 μ m, solid content 8%) in PVDF dispersion liquid, after 20min, take out 280 DEG CSintering 20min, naturally cools to room temperature. After testing, through strengthening the foam concrete of processing, its saturated water absorption is not moreProcess foam concrete and decline 90%.
Contrast embodiment
Following comparative example, all declines maximum case-embodiment 3 as base using the saturated water absorption in above-mentioned 3 casesPlinth arranges.
Comparative example 1
" particle diameter 0.5 μ m " in embodiment 3 is replaced by " particle diameter 1.5 μ m ", and all the other are same as embodiment 3. Saturated suctionThe more untreated foam concrete of water rate declines 50%.
Comparative example 2
" solid content 8% " in embodiment 3 is replaced by " solid content 12% ", and all the other are same as embodiment 3. Saturated water suctionThe more untreated foam concrete of rate declines 60%.
Comparative example 3
" 280 DEG C of sintering 20min " in embodiment 3 is replaced by " 320 DEG C of sintering 20min ", and all the other are same as enforcementExample 3. The more untreated foam concrete of saturated water absorption declines 10%.
Comparative example 4
" 280 DEG C of sintering 20min " in embodiment 3 is replaced by " 240 DEG C of sintering 20min ", and all the other are same as enforcementExample 3. The more untreated foam concrete of saturated water absorption declines 35%.
Finally, it is also to be noted that, what more than enumerate is only several specific embodiments of the present invention. Obviously, thisBrightly be not limited to above embodiment, can also have many distortion. Those of ordinary skill in the art can be from disclosed by the inventionHold all distortion of directly deriving or associating, all should think protection scope of the present invention.
Claims (2)
1. the method for utilizing PVDF dispersion liquid reinforced foam concrete performance, is characterized in that, is by foam concreteImmerse in PVDF dispersion liquid, after dipping 10～30min, take out, then through sintering; Described PVDF dispersion liquidSolid content≤10%, the particle diameter≤1 μ m of PVDF.
2. method according to claim 1, is characterized in that, described sintering refers to: 250～300 DEG C of conditionsLower sintering 10～30min, naturally cools to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000045.XA CN105601325A (en) | 2015-12-25 | 2015-12-25 | Method for enhancing performances of foam concrete by using PVDF (Polyvinylidene Fluoride) dispersion liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000045.XA CN105601325A (en) | 2015-12-25 | 2015-12-25 | Method for enhancing performances of foam concrete by using PVDF (Polyvinylidene Fluoride) dispersion liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105601325A true CN105601325A (en) | 2016-05-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511000045.XA Pending CN105601325A (en) | 2015-12-25 | 2015-12-25 | Method for enhancing performances of foam concrete by using PVDF (Polyvinylidene Fluoride) dispersion liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN105601325A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470479A (en) * | 2003-06-24 | 2004-01-28 | 乔国华 | Water-repelling foamed concrete preparing method and use thereof |
| CN101085895A (en) * | 2007-06-20 | 2007-12-12 | 深圳市明远氟涂料有限公司 | Concrete transparent protecting paint |
| US20080152813A1 (en) * | 2006-12-22 | 2008-06-26 | Michael Damian Bowe | Method for treating concrete |
| CN103224742A (en) * | 2013-04-24 | 2013-07-31 | 同济大学 | Penetration type transparent concrete protection paint and preparation method thereof |
| CN103373833A (en) * | 2013-07-05 | 2013-10-30 | 燕山大学 | Preparation method of aluminum oxide-polyvinylidene fluoride-aluminum silicate ceramic fiber flame-retardant heat preservation composite material |
-
2015
- 2015-12-25 CN CN201511000045.XA patent/CN105601325A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470479A (en) * | 2003-06-24 | 2004-01-28 | 乔国华 | Water-repelling foamed concrete preparing method and use thereof |
| US20080152813A1 (en) * | 2006-12-22 | 2008-06-26 | Michael Damian Bowe | Method for treating concrete |
| CN101085895A (en) * | 2007-06-20 | 2007-12-12 | 深圳市明远氟涂料有限公司 | Concrete transparent protecting paint |
| CN103224742A (en) * | 2013-04-24 | 2013-07-31 | 同济大学 | Penetration type transparent concrete protection paint and preparation method thereof |
| CN103373833A (en) * | 2013-07-05 | 2013-10-30 | 燕山大学 | Preparation method of aluminum oxide-polyvinylidene fluoride-aluminum silicate ceramic fiber flame-retardant heat preservation composite material |
Non-Patent Citations (2)
| Title |
|---|
| 杨鸣波等主编: "《高分子材料手册[上]》", 31 July 2009, 化学工业出版社 * |
| 舒友等主编: "《涂料配方设计与制备》", 30 August 2014, 西南交通大学出版社 * |
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Application publication date: 20160525 |
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| RJ01 | Rejection of invention patent application after publication |