CN104746794B - The preparation method of precast concrete warm keeping element based on polyurethane - Google Patents
The preparation method of precast concrete warm keeping element based on polyurethane Download PDFInfo
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- CN104746794B CN104746794B CN201310756919.9A CN201310756919A CN104746794B CN 104746794 B CN104746794 B CN 104746794B CN 201310756919 A CN201310756919 A CN 201310756919A CN 104746794 B CN104746794 B CN 104746794B
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- polyurethane
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0015—Machines or methods for applying the material to surfaces to form a permanent layer thereon on multilayered articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/003—Machines or methods for applying the material to surfaces to form a permanent layer thereon to insulating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0046—Machines or methods for applying the material to surfaces to form a permanent layer thereon to plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
- B29C44/06—Making multilayered articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
- Laminated Bodies (AREA)
- Building Environments (AREA)
Abstract
The preparation method of the present invention relates to a kind of precast concrete warm keeping element based on polyurethane, the precast concrete warm keeping element based on polyurethane includes basal layer, sandwich layer and optional surface layer, the preparation method includes: I) unhardened basal layer is provided, the unhardened basal layer by unhardened concrete preparation；II the sandwich layer) is formed on the unhardened basal layer, the sandwich layer forms hard polyurethane foam after the first polyurethane reaction system solidification by applying the first polyurethane reaction system on the unhardened basal layer for use as the sandwich layer；III) application hardening or unhardened concrete optionally on the sandwich layer；And IV) make the hardening of the unhardened concrete to form the basal layer and the optional surface layer.
Description
Technical field
The present invention relates to the preparation methods of the precast concrete warm keeping element based on polyurethane, and in particular to by not hard
The method that the first polyurethane system is applied on the concrete of change to prepare the precast concrete warm keeping element based on polyurethane.This hair
It is bright further relate to include basal layer, sandwich layer and optional surface layer the precast concrete warm keeping element based on polyurethane, in particular to
The precast concrete warm keeping element based on polyurethane including basal layer, separation layer, sandwich layer and optional surface layer.
Background technique
Precast concrete heat preservation member is that current industrialization assembly concrete builds the heat preserving mode generallyd use, the technology
Two layers of concrete panel is connected by keeping the temperature tension member, is sandwiched between the wallboard of efficient and light weight polyurethane heat insulation material.Have
Load-bearing, go along with sb. to guard him, keep the temperature, is heat-insulated, sound insulation, decoration etc. functions.Interior layer concrete is structure sheaf, and outer layer is decorative layer, can be according to not
Same architectural style is made into different patterns, such as clear-water concrete, color concrete, decorating surface brick, stone facing.
EP1010828B1 discloses a kind of preparation method of precast concrete heat preservation member based on polyurethane, wherein first pouring
First time maintenance is carried out after infusing concrete substrate layer/or surface layer, in surface layer/or basal layer upper polyurethane reaction body after curing
System forms insulating layer, and the overturning of gained element is buckled into the unhardened concrete layer of the second layer after the solidification of polyurethane reaction system
On, warm keeping element needed for maintenance obtains again.
The method of precast concrete heat preservation member of the another kind preparation based on polyurethane is first to apply unhardened mix in a mold
Then solidifying soil spells paving polyurethane sheet on molding basal layer, unhardened concrete is finally applied on polyurethane thermal insulation board,
Prefabricated polyurethane thermal insulation board is obtained after conserving.In the method, polyurethane sheet needs first pass through the mode manually cut and cut
At the shape at needs, the time-consuming effort of cutting process, and paving rear plate stitch easy to form on the base layer is spelled, influence heat preservation effect
Fruit.
Therefore there is still a need for a kind of preparation methods of the precast concrete warm keeping element based on polyurethane of high-efficiency and low-cost.
Summary of the invention
One aspect of the present invention provides a kind of preparation method of prefabricated precast concrete warm keeping element based on polyurethane, institute
Stating the precast concrete warm keeping element based on polyurethane includes basal layer, sandwich layer and optional surface layer, the preparation method packet
It includes:
I) unhardened basal layer is provided, the unhardened basal layer by unhardened concrete preparation；
II the sandwich layer) is formed on the unhardened basal layer, the sandwich layer passes through in the unhardened substrate
The first polyurethane reaction system is applied on layer, forms hard polyurethane foam after the first polyurethane reaction system solidification for use as institute
State sandwich layer；
III unhardened or hardening concrete) is optionally applied on the sandwich layer；And
IV make the hardening of the unhardened concrete) to form the basal layer and the optional surface layer.
In an embodiment of the invention, the sandwich layer with a thickness of 20-100mm.
In an embodiment of the invention, the method also includes: V) be initially formed on the unhardened basal layer every
Absciss layer, then the step of forming the sandwich layer on the separation layer, wherein the separation layer passes through in the unhardened substrate
The second polyurethane reaction system is applied on layer, forms the separation layer after the second polyurethane reaction system solidification.Preferably,
Wherein the gel time of the second polyurethane reaction system was less than 20 seconds.Preferably, the second polyurethane reaction system is solid
Hard polyurethane foam, soft polyurethane foam or polyurethane elastomer are formed after change.Preferably, the separation layer with a thickness of 1-20mm.
Preferably, the density of the separation layer is 15-1000kg/m3。
Another aspect of the present invention provides a kind of precast concrete warm keeping element based on polyurethane, comprising:
A) basal layer, the basal layer are prepared by concrete；
B) sandwich layer, the sandwich layer are prepared by hard polyurethane foam；And
C) optional surface layer, the surface layer are prepared by hardening or unhardened concrete.
In an embodiment of the invention, the sandwich layer with a thickness of 20-100mm.
In an embodiment of the invention, the precast concrete warm keeping element based on polyurethane further include: c) be isolated
Layer, the separation layer is set between the basal layer and the sandwich layer, and is contacted with the basal layer, and the separation layer passes through
The preparation of second polyurethane reaction system.Preferably, wherein the gel time of the second polyurethane reaction system was less than 20 seconds.It is excellent
Selection of land forms hard polyurethane foam, soft polyurethane foam or polyurethane elastomer after the second polyurethane reaction system solidification.It is preferred that
Ground, the separation layer with a thickness of 1-20mm.Preferably, the density of the separation layer is 15-1000kg/m3。
Specific embodiment
The present invention provides a kind of preparation sides of the precast concrete warm keeping element based on polyurethane of high-efficiency and low-cost
Method, the precast concrete warm keeping element based on polyurethane include basal layer, sandwich layer and optional surface layer, the preparation side
Method includes:
I unhardened basal layer) is provided, the unhardened basal layer is prepared by unhardened concrete；
II the sandwich layer) is formed on the unhardened basal layer, the sandwich layer passes through in the unhardened substrate
The first polyurethane reaction system is applied on layer, forms hard polyurethane foam after the first polyurethane reaction system solidification for use as institute
State sandwich layer；
III) application hardening or unhardened concrete optionally on the sandwich layer；And
IV make the unhardened concrete hardening) to form the basal layer and the optional surface layer.
This method is by before basal layer hardens, being applied onto (such as spraying or casting) first polyurethane reaction body
System, after the first polyurethane reaction system is formed by curing sandwich layer, is used to form the unhardened of surface layer optionally on sandwich layer
Or the concrete of hardening, then gained element is conserved to obtain the precast concrete warm keeping element based on polyurethane.This hair
Bright method only needs a curing step, and avoids the cutting step of polyurethane sheet, improves based on the prefabricated of polyurethane
The production efficiency of concrete heat-insulating element simultaneously reduces production cost.
As used in this application, term " concrete " has meaning commonly used in the art, refers to comprising inorganic bond
Expect the composition of (such as cement), filler material (such as gravel, sand), water and optional additive and/or auxiliary agent, wherein cement
With meaning commonly used in the art, refer to by calcined limestone, silica, aluminium oxide, lime, iron oxide, magnesia and clay
Etc. components preparation dried powder.Term " concrete " also includes " mortar " commonly used in the art, according to the present invention " mixed
Solidifying soil " and " mortar ", composition difference are only that the maximum particle size that filler material used in the composition is made is different.Term
" mortar " refers to the composition as made from the maximum particle size at most filler material of 4mm, and term " concrete " refers to by compared with roughstuff charge system
The composition obtained.In the present invention, to term " concrete " and " mortar " without further distinguishing.
As used in this application, term " unhardened concrete " refers to before forming fundamental strength, i.e., before final set
Concrete, wherein the final setting time can measure (" normal concrete mixture performance test according to GB/T50080-2002
Method standard ", the 4th chapter, " setting time measurement ").
In an embodiment of the present invention, unhardened basal layer is by being layed in shape on mold for unhardened concrete
At making unhardened concrete hardening after maintenance and form the basal layer of hardening.
In an embodiment of the present invention, after green concrete is layed on mold and forms unhardened basal layer,
Sandwich layer is formed on the unhardened basal layer, the sandwich layer is by applying the first polyurethane on the unhardened basal layer
Reaction system forms hard polyurethane foam after the first polyurethane reaction system solidification for use as the sandwich layer.Wherein first is poly-
Reactive urethane system can be that commonly used in the art for the systems for preparing hard polyurethane foam, in the preferred embodiment of the invention,
First polyurethane reaction system includes:
1a) one or more polyisocyanates, the polyisocyanates can use general formula R (NCO)nIt indicates, wherein R expression contains
The aliphatic alkyl of 2-18 carbon atom or aryl containing 6-15 carbon atom contain 8-15 carbon atom aryl aliphatic hydrocarbyl,
N=2-4；It is preferred that MDI and TDI performed polymer, monomer mixture；More preferably preferred MDI performed polymer, monomer mixture；
1b) one or more polyalcohols, the average molecular weight of the polyalcohol are 100-10000, degree of functionality 2-8；It is excellent
Selection of land, the polyalcohol are selected from following one or more: using sucrose, glycerol, sorbierite or diethanol amine as initiator polyethers
Polyalcohol, the polyester polyol based on phthalic anhydride；With
1c) one or more foaming agents of 0.3-15wt.%, by 1b) weight based on 100wt.%
1d) one or more catalyst of 0-2wt.%, by 1b) and weight 1c) based on 100wt.%.
The first polyurethane reaction system can also include the auxiliary agent being usually used in this field, such as fire retardant, crosslinking
Agent, chain extender etc..
The first polyurethane reaction system, which is applied on the unhardened basal layer, can use in this field
The method known, such as spraying and casting.According to actual demand, the first polyurethane reaction system can be applied with multilayer, preparation
The thickness of sandwich layer can be 20-100mm.
In some preferred embodiments of the invention, unhardened basal layer is applied in the first polyurethane reaction system
Before, first the second polyurethane reaction system is applied on the unhardened basal layer to form one or more layers rigid polyurethane
Then bubble, soft polyurethane foam or polyurethane elastomer material apply above-mentioned first to form separation layer on the separation layer
Polyurethane reaction system is to form sandwich layer.Wherein the second polyurethane reaction system can be poly- commonly used in the art for preparing
The system of urethane hard bubble, soft polyurethane foam or polyurethane elastomer.Due to for hardening concrete in containing more moisture with
And alkaline matter, these substances can be reacted with the first polyurethane reaction system, to influence the performance of hard polyurethane foam.Isolation
Layer can contact to avoid the first polyurethane system with unhardened concrete, to avoid the performance of damage hard polyurethane foam.
In a preferred embodiment of the invention, the second polyurethane reaction system includes:
2a) one or more polyisocyanates, the polyisocyanates can use general formula R (NCO)nIt indicates, wherein R expression contains
The aliphatic alkyl of 2-18 carbon atom or aryl containing 6-15 carbon atom contain 8-15 carbon atom aryl aliphatic hydrocarbyl,
N=2-4；It is preferred that MDI and TDI performed polymer, monomer mixture；More preferably preferred MDI performed polymer, monomer mixture；
2b) polyalcohol and/or amine terminated polyether, the polyalcohol are selected from following one or more: polyether polyol, poly-
Ester polyol, polycarbonate polyol, polycaprolactone polyol, polytetrahydrofuran polyol, the polyalcohol and Amino End Group are poly-
The molecular weight of ether is greater than 100-8000, degree of functionality 2-6；
2c) one or more foaming agents of 0-15wt.%, by 2b) weight based on 100wt.%；With
2d) one or more catalyst of 0-2wt.%, by 2b) and weight 2c) based on 100wt.%；
The first polyurethane reaction system can also include the auxiliary agent being usually used in this field, such as fire retardant, crosslinking
Agent, chain extender etc..
In the preferred embodiment of the invention, the gel time of the second polyurethane reaction system is more preferably small less than 40 seconds
In 20 seconds, more preferably less than 10 seconds.Polyurethane reaction system reactivity with shorter gel time is higher therefore unhardened
Concrete in the influence to it of moisture and alkaline matter it is also smaller.
Hard polyurethane foam, soft polyurethane foam or polyurethane elastomer material can be formed after the solidification of second polyurethane reaction system
Material, to form separation layer.The thickness of separation layer can be 1-20mm.Form hard polyurethane foam, the soft polyurethane foam of separation layer
Or the density of polyurethane elastomer material is 15-1000kg/m3, preferably 20-200kg/m3, most preferably 25-100kg/m3。
Second polyurethane system can be applied on the unhardened basal layer by mode commonly used in the art, such as
Spraying or casting.
In an embodiment of the invention, unhardened or hardening concrete, institute are optionally applied on the sandwich layer of formation
It states unhardened concrete and forms surface layer in maintenance after-hardening.The unhardened concrete for being used to form surface layer can be with shape
It is identical or different at the unhardened concrete of basal layer.
In an embodiment of the present invention, the hard of the unhardened concrete can be made using method commonly used in the art
Change, such as commonly used in the art for the methods of concrete curing.Maintenance process commonly used in the art has natural curing, steam to support
Shield, dry and wet thermal curing, steam press maintenance, electric heat curing, infrared ray curing and solar energy curing etc..In one embodiment of the invention
In, above-mentioned resulting component is conserved under conditions of temperature is 20 ± 3 DEG C, humidity is not less than 90% until concrete reaches institute
The intensity needed obtains the precast concrete warm keeping element based on polyurethane.
Another aspect of the present invention further relates to a kind of precast concrete warm keeping element based on polyurethane, described to be based on polyurethane
Precast concrete warm keeping element include:
A) basal layer, the basal layer are prepared by concrete；
B) sandwich layer, the sandwich layer are prepared by hard polyurethane foam；And
C) optional surface layer, the surface layer are prepared by concrete.
In the preferred embodiment of the invention, the precast concrete warm keeping element based on polyurethane further include: c) every
Absciss layer, the separation layer are set between the basal layer and the sandwich layer, and are contacted with the basal layer, and the separation layer is logical
The preparation of the second polyurethane reaction system is crossed, wherein the second polyurethane reaction system is as described above.Wherein the separation layer can
To expand the process tolerance of sandwich layer, the thermal insulation property of hard polyurethane foam sandwich layer is improved.
Precast concrete warm keeping element based on polyurethane of the invention can be the precast concrete-for exterior-wall heat insulation
Polyurethane thermal insulation wallboard, or polyurethane heat-insulation concrete floor etc..
Precast concrete-polyurethane thermal insulation wallboard is in addition to including basal layer, sandwich layer, other than surface layer, optionally can also include
Coat of plaster, architectural surface etc., according further to the installation method of insulation board, can be arranged on heat-insulation wall plate built-in fitting, lifting part,
The components such as connector.
Hereinafter, the invention will be further described in conjunction with the embodiments.Specific embodiment disclosed in this invention and side
Method, description are illustrative and not restrictive.
Embodiment
The raw material referred in context is described as follows:
Desmodur44V20L: polymeric MDI isocyanates, NCO content 31.5%, 160mPas25 DEG C of viscosity, purchased from visiing
Ear material Science and Technology Ltd.；
BJ3-5601I: hard polyurethane foam sprays system, 125mPas25 DEG C of viscosity, is purchased from Bayer material
Expect Science and Technology Ltd.；
BJ3-5603I: hard polyurethane foam sprays system, 285mPas25 DEG C of viscosity, is purchased from Bayer material
Expect Science and Technology Ltd.；
SPRAY AL810: hard polyurethane foam sprays system, 270mPas25 DEG C of viscosity, is purchased from Bayer
Material Science and Technology Ltd.；
SPRAY H03: hard polyurethane foam sprays system, 1250mPas25 DEG C of viscosity, is purchased from Bayer
Material Science and Technology Ltd.；
Graco Reactor A-20 type conventional high-pressure flush coater: it is purchased from GRACO company.
Embodiment 1
With Graco Reactor A-20 type conventional high-pressure flush coater, by the component of the second polyurethane reaction system
Desmodur44V20L andSPRAY H03 material temperature is adjusted to 45-50 DEG C and sprays to by 1: 1 volume ratio
On fresh casting moist concrete basal layer, the reaction of polyurethane coating system, foaming, solidification form a 1-5mm and spray poly- ammonia
Ester separation layer.The performance of gained spraying polyurethane separation layer is listed in table 1-1.
The performance of table 1-1 the second polyurethane reaction system
After the spraying of the second polyurethane reaction system is completed 2-4 minutes, by the component of the first polyurethane reaction system
Desmodur44V20L andBJ3-5601I material temperature be adjusted to 45-50 DEG C by 1: 1 volume ratio spray to every
On the surface of absciss layer, the reaction of polyurethane coating system, foaming, solidification form a 20-30mm polyurethane coating sandwich layer.It repeats
Above-mentioned spraying operation to spray foam sandwich layer reaches required thickness.The performance of gained spraying polyurethane sandwich layer is listed in table 1-2.Environment
About 25 DEG C of temperature.About 20-25 DEG C of the resulting polyurethane foam surface temperature of first polyurethane reaction system.
The reaction time of table 1-1 the first polyurethane reaction system and foaming properties
Embodiment 1 illustrates that the hard polyurethane foam sandwich layer as made from the first polyurethane reaction system has good physical
Energy and heat-proof quality.
Embodiment 2
With Graco Reactor A-20 type conventional high-pressure flush coater, by the component of the second polyurethane reaction system
Desmodur44V20L andBJ3-5603I material temperature is adjusted to 45-50 DEG C and sprays to newly by 1: 1 volume ratio
On fresh casting moist concrete basal layer, the reaction of polyurethane coating system, foaming, solidification form one layer of 1-5mm polyurethane isolation
Layer.The performance of gained spraying polyurethane separation layer is listed in table 2-1.About 25 DEG C of environment temperature, the second polyurethane reaction system gained
About 20-25 DEG C of foam surface temperature.
The reaction time of table 2-1 the second polyurethane reaction system and foaming properties
After the spraying of the second polyurethane reaction system is completed 2-4 minutes, by the component of the first polyurethane reaction system
Desmodur44V20L andAL810 material temperature is adjusted to 45-50 DEG C and sprays to polyurethane by 1: 1 volume ratio
In insulation surface, the reaction of polyurethane coating system, foaming, solidification form a 20-30mm hard polyurethane foam sandwich layer.It repeats
Aforesaid operations to spray foam sandwich layer reaches required depth of foam.The performance of gained polyurethane spray foam sandwich layer is listed in table 2-2.
About 25 DEG C of environment temperature, the first about 20-25 DEG C of temperature of foam surface of gained of polyurethane reaction system.
The reaction time of table 2-2 the first polyurethane reaction system and foaming properties
When the second polyurethane reaction system that do not useWhen BJ3-56031/44V20L forms separation layer, and
Directly by the first polyurethane reaction systemWhen AL810/44V20L sprays to moist green concrete surface,
2-10mm can be formed compared with low-density, the higher rigid foam froth bed of percent opening in concrete surface.This layer of rigid foam froth bed
High thermal conductivity 23-24mW/m.K is presented.Foams and concrete are not attached to side, and surface portion is presented defect, has and do not advise
Then ripple glaze generates.
The explanation of embodiment 2, the method provided according to the present invention the precast concrete warm keeping element obtained based on polyurethane
With good physical property and heat-proof quality, and gained hard polyurethane foam sandwich layer has preferable mechanical property and appearance knot
Structure.
Claims (12)
1. a kind of preparation method of the prefabricated precast concrete warm keeping element based on polyurethane, described prefabricated mixed based on polyurethane
Solidifying soil warm keeping element includes basal layer, sandwich layer and optional surface layer, and the preparation method includes:
I unhardened basal layer) is provided, the unhardened basal layer is prepared by unhardened concrete；
II it) is initially formed separation layer on the unhardened basal layer, it is anti-that the first polyurethane is then applied on the separation layer
System forming sandwich layer is answered, forms hard polyurethane foam after the first polyurethane reaction system solidification for use as the sandwich layer；Wherein
The separation layer after applying the solidification of the second polyurethane reaction system on the unhardened basal layer by forming；
III unhardened or hardening concrete) is optionally applied on the sandwich layer；And
IV make the hardening of the unhardened concrete) to form the basal layer and the optional surface layer.
2. according to the method described in claim 1, wherein the sandwich layer with a thickness of 20-100mm.
3. according to the method described in claim 1, wherein the gel time of the second polyurethane reaction system was less than 20 seconds.
4. according to the method described in claim 1, the separation layer with a thickness of 1-20mm.
5. according to the method described in claim 1, wherein formed after the second polyurethane reaction system solidification hard polyurethane foam,
Soft polyurethane foam or polyurethane elastomer.
6. according to the method described in claim 1, wherein the density of the separation layer is 15-1000kg/m3。
7. a kind of precast concrete warm keeping element as made from any one of claim 1-6 method based on polyurethane, comprising:
A) basal layer, the basal layer are prepared by concrete；
B) separation layer and sandwich layer, the sandwich layer are prepared by hard polyurethane foam, and the separation layer is set to the basal layer and described
It between sandwich layer, and is contacted with the basal layer, the separation layer is prepared by the second polyurethane reaction system；And
C) optional surface layer, the surface layer are prepared by concrete.
8. the precast concrete warm keeping element according to claim 7 based on polyurethane, the sandwich layer with a thickness of 20-
100mm。
9. the precast concrete warm keeping element according to claim 7 based on polyurethane, the second polyurethane reaction body
The gel time of system was less than 20 seconds.
10. the precast concrete warm keeping element according to claim 7 based on polyurethane, the separation layer with a thickness of 1-
20mm。
11. the precast concrete warm keeping element according to claim 7 based on polyurethane, wherein second polyurethane is anti-
Hard polyurethane foam, soft polyurethane foam or polyurethane elastomer are formed after answering system to solidify.
12. the precast concrete warm keeping element according to claim 7 based on polyurethane, wherein the density of the separation layer
For 15-1000kg/m3。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756919.9A CN104746794B (en) | 2013-12-31 | 2013-12-31 | The preparation method of precast concrete warm keeping element based on polyurethane |
| PCT/EP2014/079107 WO2015101549A1 (en) | 2013-12-31 | 2014-12-23 | Process for preparing a precast polyurethane-based concrete insulation element and element obtained by such process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756919.9A CN104746794B (en) | 2013-12-31 | 2013-12-31 | The preparation method of precast concrete warm keeping element based on polyurethane |
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| Publication Number | Publication Date |
|---|---|
| CN104746794A CN104746794A (en) | 2015-07-01 |
| CN104746794B true CN104746794B (en) | 2019-03-01 |
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| CN201310756919.9A Expired - Fee Related CN104746794B (en) | 2013-12-31 | 2013-12-31 | The preparation method of precast concrete warm keeping element based on polyurethane |
Country Status (2)
| Country | Link |
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| CN (1) | CN104746794B (en) |
| WO (1) | WO2015101549A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105541395B (en) * | 2016-01-14 | 2017-11-21 | 中建一局集团第二建筑有限公司 | Maintenance method of concrete vertical member |
| CN107553806B (en) * | 2016-07-01 | 2021-08-24 | 科思创德国股份有限公司 | Polyurethane concrete sandwich element and its making method |
| CN106437038A (en) * | 2016-07-21 | 2017-02-22 | 杭州久盛建材有限公司 | Corrugated waterproof heat-insulation integrated plate, processing technique and construction method |
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| DE4200159C1 (en) * | 1992-01-07 | 1993-03-18 | Ralf 2872 Hude De Mehrings | Prodn. of plate section for sound-proofing wall - by forming steel-concrete carrier plate with profiled sound-absorbing front plate contg. elastic granules and binding agent shaped with stamp |
| EP1010828A2 (en) * | 1998-12-17 | 2000-06-21 | Alexander Bauer | Production process of a prefabricated wall element for the construction of building walls |
| CN101139857A (en) * | 2003-09-15 | 2008-03-12 | 邱则有 | Lightweight tyre mould component for cast-in-situs concrete |
| CN201141184Y (en) * | 2007-12-24 | 2008-10-29 | 陈炳辉 | Three-layer heat preserving decoration compound board |
| CN101906845A (en) * | 2010-07-07 | 2010-12-08 | 常熟科盈复合材料有限公司 | Light-weight and high-intensity wall plate |
| CN203080713U (en) * | 2012-11-26 | 2013-07-24 | 江苏尼高科技有限公司 | Three-dimensional gridding cloth polyurethane thermal insulation composite board |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015101549A1 (en) | 2015-07-09 |
| CN104746794A (en) | 2015-07-01 |
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