CN106747123A - A kind of self-heat conserving template cement foaming insulation board and preparation method thereof - Google Patents
A kind of self-heat conserving template cement foaming insulation board and preparation method thereof Download PDFInfo
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- CN106747123A CN106747123A CN201710054758.7A CN201710054758A CN106747123A CN 106747123 A CN106747123 A CN 106747123A CN 201710054758 A CN201710054758 A CN 201710054758A CN 106747123 A CN106747123 A CN 106747123A
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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
- 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
- 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
- C04B28/06—Aluminous 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2111/40—Porous or lightweight materials
Abstract
The invention discloses a kind of self-heat conserving template cement foaming insulation board, it is prepared from by the raw material of following weight portion：60 100 parts of cement, 5 30 parts of coal ash, 5 10 parts of silicon ash, 23 parts of foam stabilizer, 67 parts of foaming agent, 0.2 1 parts of water reducer, 0.5 1.5 parts of reinforcing fiber, 28 parts of polymer emulsion, 30 70 parts of water.The invention also discloses the preparation method of the self-heat conserving template cement foaming insulation board.The present invention effectively reduces the early stage chemical shrinkage and drying shrinkage of warming plate by adding flyash and silicon ash, the toughness and cohesive force of warming plate are improved by adding polymer emulsion, for self-heat conserving template provides a kind of warming plate good integrity, fire prevention, lightweight, high-strength, good toughness, the strong heat insulation base plate of cohesive force.
Description
Technical field
The present invention relates to building thermal insulation material field, and in particular to a kind of self-heat conserving template cement foaming insulation board and its
Preparation method.
Background technology
Traditional architecture insulation is building exterior wall heat preserving, the matter such as often occurs hollowing in actual use, ftracture, come off
Amount defect and problem.In order to fundamentally solve the mass defect and problem of exterior-wall heat insulation, building element self-heat conserving is a kind of big
Gesture is become, and also has national policy to be oriented to.Filling part potential energy is solved with self-heat conserving masonry, and the beam of building, post, shear wall position are deposited
In cold-heat bridge problem, can only pour to complete by external wall outer insulation and self-heat conserving；And best solution is exactly self-heat conserving
Non-dismantling formwork.Insulation and template function are reached simultaneously, it is desirable to which the warming plate of self-heat conserving non-dismantling formwork has non-ignitable, quality simultaneously
Gently, the characteristics of intensity is high, cohesive force is good.
Chinese patent literature CN104261858 discloses a kind of modified foaming cement heat preserving plate and preparation method thereof, and it is adopted
With portland cement or blended cement, hydrogen peroxide, glass fibre, foam stabilizer and water mixed foaming, the warming plate pressure resistance of production
Degree is high.But there is also the deficiency for being not suitable for self-heat conserving template：Due to being neat cement gelling in warming plate production process, i.e., one be
Cement paste is gelled, and cement paste gelling has larger early stage chemical shrinkage rate and later stage drying shrinkage, is solidifying and is drying
Process has larger volume contraction, and cement paste warming plate plate face specification is not preferably greater than 300 ㎜ × 500 ㎜, plate otherwise occurs
Face warpage, crackle or crack, destroy the integrality and flatness of self-heat conserving template；Two is big cement paste warming plate fragility,
Poor toughness, impact resistance is poor.
Chinese patent literature CN106045457 discloses a kind of high-strength waterproof foaming insulation board and preparation method thereof,
It is used：Inorganic coagulation material, aqueous reinforcing material, aqueous solidified, foaming agent, foam stabiliser, coagulant, water reducer, increasing
Thick dose, waterproofing agent, filler, aquatic product warming plate intensity it is high；But it is filler, quartz particles due to using quartz particles at high proportion
Specific surface area is small, and bulk density is big, and the warming plate unit weight of production is also big, is not suitable for self-heat conserving template.
The content of the invention
An object of the present invention is in view of the shortcomings of the prior art, there is provided a kind of good integrity, fire prevention, lightweight,
The strong self-heat conserving template cement foaming insulation board of high-strength, good toughness, cohesive force.
The technical scheme is that:
A kind of self-heat conserving template cement foaming insulation board, is prepared from by the raw material of following weight portion：Cement 60-
100 parts, coal ash 5-30 parts, silicon ash 5-10 parts, foam stabilizer 2-3 parts, foaming agent 6-7 parts, water reducer 0.2-1 parts, reinforcing fiber
0.5-1.5 parts, polymer emulsion 2-8 parts, water 30-70 parts.
Preferably, the cement is one or two mixtures in portland cement, aluminate cement.
Preferably, the flyash is one-level ash or second-level ash.
Preferably, the foam stabilizer is the hot melt blend of stearic acid and fine particle calcium carbonate, preparation method is by fine particle calcium carbonate and tristearin
Acid is according to 4：1 to 16：1 weight is heated to 65-85 DEG C than well mixed, heats while stirring 30 minutes, and grinding is extremely after cooling
150 mesh.
Preferably, the foaming agent is hydrogen peroxide.
Preferably, the water reducer is at least in methacrylate copolymer, polycarboxylic acids, calcium lignosulfonate
Kind.
Preferably, the reinforcing fiber is at least one in polypropylene fibre, glass fibre, string.
Preferably, the polymer emulsion is：In polyacrylate dispersion, polyvinyl acetate emulsion at least one
Kind.
Preferably, running water of the described water for 38-50 DEG C of temperature.
Present invention also offers the preparation method of the self-heat conserving template cement foaming insulation board, comprise the following steps：
Step one, the raw material for sequentially adding corresponding weight portion in order：Water, polymer emulsion, water reducer, cement, coal
Ash, silicon ash, foam stabilizer, reinforcing fiber are stirred mixing, and mixing time is 60-240 seconds, is stirred 6-8 seconds after adding foaming agent
Pour into foaming in mould rapidly afterwards.
Step 2, the expanded moldings in mould are conserved indoors 24-48 hours after the demoulding, continue conserve 72 hours after
Cut into the size of needs, continue to conserve to standby after 28 days.
Compared with prior art, the positive effect of the present invention is as follows：The present invention is effectively dropped by adding flyash and silicon ash
The early stage chemical shrinkage and drying shrinkage of low warming plate, the toughness and cohesion of warming plate are improved by adding polymer emulsion
Power, base is incubated by force for self-heat conserving template provides a kind of warming plate good integrity, fire prevention, lightweight, high-strength, good toughness, cohesive force
Plate.
Specific embodiment
In order to be more clearly understood that the above objects, features and advantages of the present invention, with reference to specific embodiment pair
The present invention is further illustrated.The present invention can also be implemented using the other manner different from embodiment, therefore, the present invention is not
It is limited to the limitation of the specific embodiment of specification described below.
Embodiment 1
By following weight than preparing raw material：60 parts of cement, 30 parts of coal ash, 5 parts of silicon ash, 2 parts of foam stabilizer, 6 parts of foaming agent,
0.5 part of water reducer, 0.5 part of reinforcing fiber, 8 parts of polymer emulsion, 45 parts of water.
Wherein, cement is 52.5 Portland cements；Coal ash is one-level flyash；Foam stabilizer is stearic acid and fine particle calcium carbonate
Hot melt blend, preparation method is that fine particle calcium carbonate is well mixed with stearic acid, is heated to 65-85 DEG C, is heated while stirring 30 minutes,
After cooling grinding to 150 mesh with thin；Foaming agent is hydrogen peroxide, and water reducer is polycarboxylate water-reducer, and reinforcing fiber is fine polypropylene
Dimension, polymer emulsion is polyacrylate dispersion, and water is 43 DEG C of running water.
Sequentially adding water, polymer emulsion, water reducer, cement, coal ash, silicon ash, foam stabilizer, reinforcing fiber in order is carried out
Stirring mixing, mixing time is that after 120 seconds, stirring pours into foaming in mould rapidly after 6 seconds after addition foaming agent.By mould
In expanded moldings conserve the demoulding after 24 hours indoors, continue to cut into the size of needs after conserving 72 hours, continue to support
Shield was to 28 days.
Embodiment 2
By following weight than preparing raw material：70 parts of cement, 20 parts of coal ash, 5 parts of silicon ash, 2 parts of foam stabilizer, foaming agent 6.1
Part, 0.6 part of water reducer, 0.5 part of reinforcing fiber, 7 parts of polymer emulsion, 42 parts of water.
Wherein, cement is 52.5 Portland cements 95%, the mixture of aluminate cement 5%；Coal ash is first level flour
Coal ash；Foam stabilizer is the hot melt blend of stearic acid and fine particle calcium carbonate, and preparation method is that fine particle calcium carbonate is well mixed with stearic acid, is heated to
65-85 DEG C, heat while stirring 30 minutes, after cooling grinding to 150 mesh with thin；Foaming agent is hydrogen peroxide, and water reducer is wooden
Plain sulfoacid calcium water reducer, reinforcing fiber is modified glass-fiber, and polymer emulsion is polyvinyl acetate emulsion, water be 45 DEG C from
Water.
Sequentially adding water, polymer emulsion, water reducer, cement, coal ash, silicon ash, foam stabilizer, reinforcing fiber in order is carried out
Stirring mixing, mixing time is that after 180 seconds, stirring pours into foaming in mould rapidly after 8 seconds after addition foaming agent.By mould
In expanded moldings conserve the demoulding after 48 hours indoors, continue to cut into the size of needs after conserving 72 hours, continue to support
Shield was to 28 days.
Embodiment 3
By following weight than preparing raw material：80 parts of cement, 5 parts of coal ash, 10 parts of silicon ash, 2.2 parts of foam stabilizer, foaming agent
6.3 parts, 0.5 part of water reducer, 1 part of reinforcing fiber, 6 parts of polymer emulsion, 48 parts of water.
Wherein, cement is 52.5 Portland cements 90%, the mixture of aluminate cement 10%；Coal ash is second patent flour
Coal ash；Foam stabilizer is the hot melt blend of stearic acid and fine particle calcium carbonate, and preparation method is that fine particle calcium carbonate is well mixed with stearic acid, is heated to
65-85 DEG C, heat while stirring 30 minutes, after cooling grinding to 150 mesh with thin；Foaming agent is hydrogen peroxide, and water reducer is wooden
Plain sulfoacid calcium water reducer, reinforcing fiber is modified glass-fiber, and polymer emulsion is polyvinyl acetate emulsion, water be 46 DEG C from
Water.
Sequentially adding water, polymer emulsion, water reducer, cement, coal ash, silicon ash, foam stabilizer, reinforcing fiber in order is carried out
Stirring mixing, mixing time is that after 150 seconds, stirring pours into foaming in mould rapidly after 7 seconds after addition foaming agent.By mould
In expanded moldings conserve the demoulding after 24 hours indoors, continue to cut into the size of needs after conserving 72 hours, continue to support
Shield was to 28 days.
Embodiment 4
By following weight than preparing raw material：90 parts of cement, 5 parts of coal ash, 5 parts of silicon ash, 2.0 parts of foam stabilizer, foaming agent 6.0
Part, 0.4 part of water reducer, 1 part of reinforcing fiber, 5 parts of polymer emulsion, 45 parts of water.
Wherein, cement is 52.5 Portland cements；Coal ash is one-level flyash；Foam stabilizer is stearic acid and fine particle calcium carbonate
Hot melt blend, preparation method is that fine particle calcium carbonate is well mixed with stearic acid, is heated to 65-85 DEG C, is heated while stirring 30 minutes,
After cooling grinding to 150 mesh with thin；Foaming agent is hydrogen peroxide, and water reducer is polycarboxylate water-reducer, and reinforcing fiber is modified glass
Fiber, polymer emulsion is polyvinyl acetate emulsion, and water is 48 DEG C of running water.
Sequentially adding water, polymer emulsion, water reducer, cement, coal ash, silicon ash, foam stabilizer, reinforcing fiber in order is carried out
Stirring mixing, mixing time is that after 120 seconds, stirring pours into foaming in mould rapidly after 7 seconds after addition foaming agent.By mould
In expanded moldings conserve the demoulding after 24 hours indoors, continue to cut into the size of needs after conserving 72 hours, continue to support
Shield was to 28 days.
Embodiment 5
By following weight than preparing raw material：100 parts of cement, 5 parts of coal ash, 5 parts of silicon ash, 2.1 parts of foam stabilizer, foaming agent
6.2 parts, 0.4 part of water reducer, 1 part of reinforcing fiber, 4 parts of polymer emulsion, 51 parts of water.
Wherein, cement is 52.5 Portland cements 80%, the mixture of aluminate cement 20%；Coal ash is first level flour
Coal ash；Foam stabilizer is the hot melt blend of stearic acid and fine particle calcium carbonate, and preparation method is that fine particle calcium carbonate is well mixed with stearic acid, is heated to
65-85 DEG C, heat while stirring 30 minutes, after cooling grinding to 150 mesh with thin；Foaming agent is hydrogen peroxide, and water reducer is wooden
Plain sulfoacid calcium and polycarboxylic acids 1：1 mixture, reinforcing fiber is polypropylene fibre, and polymer emulsion is polyacrylate dispersion, water
It is 48 DEG C of running water.
Sequentially adding water, polymer emulsion, water reducer, cement, coal ash, silicon ash, foam stabilizer, reinforcing fiber in order is carried out
Stirring mixing, mixing time is that after 120 seconds, stirring pours into foaming in mould rapidly after 7 seconds after addition foaming agent.By mould
In expanded moldings conserve the demoulding after 24 hours indoors, continue to cut into the size of needs after conserving 72 hours, continue to support
Shield was to 28 days.
Obtained self-heat conserving template in embodiment is carried out into performance detection with cement foaming insulation board, and with conventional vacuum plate
Contrasted, as a result as shown in table 1.
The self-heat conserving template cement foaming insulation board performance test results of table 1
| Detection project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Traditional product |
| Density , ㎏/m3 | 231 | 228 | 220 | 245 | 255 | 240 |
| 28d plate face tensile strength, MPa | 0.25 | 0.24 | 0.23 | 0.22 | 0.21 | 0.11 |
| 28d compression strength, MPa | 1.35 | 1.39 | 1.28 | 1.65 | 1..92 | 0.69 |
| Thermal conductivity factor W/ (m.K) | 0.064 | 0.063 | 0.061 | 0.065 | 0.067 | 0.067 |
As shown in Table 1：The self-heat conserving template cement foaming insulation board of the present embodiment is suitable with traditional product in unit weight
In the case of, its plate face tensile strength and compression strength are substantially better than traditional product, meet self-heat conserving non-dismantling formwork to warming plate
Particular/special requirement：Non-ignitable, light weight, intensity are high, cohesive force is good.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferably implementation method, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modification and implementation methods, and these modifications and implementation method will fall in principle disclosed in the present application
Within scope and spirit.
Claims (10)
1. a kind of self-heat conserving template cement foaming insulation board, it is characterised in that be prepared from by the raw material of following weight portion：
Cement 60-100 parts, coal ash 5-30 parts, silicon ash 5-10 parts, foam stabilizer 2-3 parts, foaming agent 6-7 parts, water reducer 0.2-1 parts, enhancing
Fiber 0.5-1.5 parts, polymer emulsion 2-8 parts, water 30-70 parts.
2. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：The cement is silicate
One or two mixtures in cement, aluminate cement.
3. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：The flyash is one-level
Ash or second-level ash.
4. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：The foam stabilizer is tristearin
Acid and the hot melt blend of fine particle calcium carbonate, preparation method are according to 4 by fine particle calcium carbonate and stearic acid：1 to 16：1 weight ratio is well mixed, plus
Heat heats while stirring 30 minutes to 65-85 DEG C, and grinding is to 150 mesh after cooling.
5. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：The foaming agent is dioxygen
Water.
6. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：The water reducer is methyl
At least one in acrylate copolymer, polycarboxylic acids, calcium lignosulfonate.
7. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：The reinforcing fiber is poly-
At least one in tacryl, glass fibre, string.
8. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：The polymer emulsion
For：At least one in polyacrylate dispersion, polyvinyl acetate emulsion.
9. self-heat conserving template cement foaming insulation board according to claim 1, it is characterised in that：Described water is temperature
38-50 DEG C of running water.
10. the preparation method of self-heat conserving template cement foaming insulation board described in claim 1 to 9 any claim, it is special
Levy is to comprise the following steps：
Step one, the raw material for sequentially adding corresponding weight portion in order：Water, polymer emulsion, water reducer, cement, coal ash, silicon
Ash, foam stabilizer, reinforcing fiber are stirred mixing, and mixing time is 60-240 seconds, rapid after being stirred 6-8 seconds after addition foaming agent
Pour into foaming in mould；
Step 2, the expanded moldings in mould are conserved indoors 24-48 hours after the demoulding, continue conserve 72 hours after cut
Into the size for needing, continue to conserve to standby after 28 days.
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| CN201710054758.7A CN106747123A (en) | 2017-01-24 | 2017-01-24 | A kind of self-heat conserving template cement foaming insulation board and preparation method thereof |
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| CN201710054758.7A CN106747123A (en) | 2017-01-24 | 2017-01-24 | A kind of self-heat conserving template cement foaming insulation board and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382223A (en) * | 2017-06-30 | 2017-11-24 | 常州思宇知识产权运营有限公司 | A kind of preparation method of cement foaming insulation board |
| CN108558307A (en) * | 2018-04-02 | 2018-09-21 | 东南大学 | A kind of FA@CNTs enhanced foaming cement heat preserving plates |
| CN108585928A (en) * | 2018-07-20 | 2018-09-28 | 合肥隆扬环保科技有限公司 | A kind of freeze proof anticracking cement foaming insulation board |
| CN109081659A (en) * | 2018-08-08 | 2018-12-25 | 赵丽敏 | A kind of heat insulating board and preparation method thereof with fire-proof function |
| WO2019000589A1 (en) * | 2017-06-29 | 2019-01-03 | 陆丽娟 | Cement foaming insulation board for self-insulating template |
| CN109305786A (en) * | 2018-09-07 | 2019-02-05 | 怀宁建国混凝土制品有限责任公司 | A kind of high-strength cracking-resistant foamed cement |
| CN109704665A (en) * | 2017-10-26 | 2019-05-03 | 咸树军 | A kind of manufacture craft of foamed concrete |
| CN109704696A (en) * | 2019-03-04 | 2019-05-03 | 深圳市翠箓科技绿化工程有限公司 | The composition and preparation method of vertical planting cultivating container preparation |
| CN112299810A (en) * | 2019-07-25 | 2021-02-02 | 孔德奎 | Assembled building heat-insulation wallboard and preparation method thereof |
| CN114059772A (en) * | 2021-12-22 | 2022-02-18 | 瑞洲建设集团有限公司 | Integral casting one-step forming construction process for house building |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019000589A1 (en) * | 2017-06-29 | 2019-01-03 | 陆丽娟 | Cement foaming insulation board for self-insulating template |
| CN107382223A (en) * | 2017-06-30 | 2017-11-24 | 常州思宇知识产权运营有限公司 | A kind of preparation method of cement foaming insulation board |
| CN109704665A (en) * | 2017-10-26 | 2019-05-03 | 咸树军 | A kind of manufacture craft of foamed concrete |
| CN108558307A (en) * | 2018-04-02 | 2018-09-21 | 东南大学 | A kind of FA@CNTs enhanced foaming cement heat preserving plates |
| CN108585928A (en) * | 2018-07-20 | 2018-09-28 | 合肥隆扬环保科技有限公司 | A kind of freeze proof anticracking cement foaming insulation board |
| CN109081659A (en) * | 2018-08-08 | 2018-12-25 | 赵丽敏 | A kind of heat insulating board and preparation method thereof with fire-proof function |
| CN109305786A (en) * | 2018-09-07 | 2019-02-05 | 怀宁建国混凝土制品有限责任公司 | A kind of high-strength cracking-resistant foamed cement |
| CN109704696A (en) * | 2019-03-04 | 2019-05-03 | 深圳市翠箓科技绿化工程有限公司 | The composition and preparation method of vertical planting cultivating container preparation |
| CN112299810A (en) * | 2019-07-25 | 2021-02-02 | 孔德奎 | Assembled building heat-insulation wallboard and preparation method thereof |
| CN114059772A (en) * | 2021-12-22 | 2022-02-18 | 瑞洲建设集团有限公司 | Integral casting one-step forming construction process for house building |
| CN114059772B (en) * | 2021-12-22 | 2023-02-28 | 瑞洲建设集团有限公司 | Integral casting one-step forming construction process for house building |
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