CN102674775B - Plastic film microbubble thermal insulation slurry and preparation method thereof - Google Patents
Plastic film microbubble thermal insulation slurry and preparation method thereof Download PDFInfo
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- CN102674775B CN102674775B CN 201210168115 CN201210168115A CN102674775B CN 102674775 B CN102674775 B CN 102674775B CN 201210168115 CN201210168115 CN 201210168115 CN 201210168115 A CN201210168115 A CN 201210168115A CN 102674775 B CN102674775 B CN 102674775B
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Abstract
The invention discloses a plastic film microbubble thermal insulation slurry and a preparation method thereof. The thermal insulation slurry is prepared by mixing a slurry body, plastic film microbubbles and water; the slurry body comprises, by weight, 60-80% of cementing materials, 5-20% of coal ashes, 0.5-3% of re-dispersible emulsion powders, 0.1-0.5% of water reducing agents and 0.1-0.5% of polypropylene (PP) fibers; and the weight of the plastic film microbubbles is 10-20% of that of the slurry, the plastic film microbubbles are plastic film air bubble balls, and carbon dioxide is filled in the air bubble balls. According to the plastic film microbubble thermal insulation slurry and the preparation method thereof, heat conductivity coefficient values of materials can be greatly reduced, water absorption is reduced, and the freezing-thaw resistance is improved.
Description
Technical field
The invention belongs to building material technical field, relate in particular to a kind of plastic film microvesicle heat preservation slurry and preparation method thereof.
Background technology
Wall heat insulation material is the type material that development in recent years is got up, and is mainly used in skin heat insulating engineering, and purpose is to improve the comfort level of living environment, and save energy reduces environmental pollution.The heat preservation slurry that the energy saving building heat insulating work is commonly used has adhesive powder-polystyrene granule thermal insulation mortar, vitrified micro-bead heat preserving slurry, the heat preservation slurry (foamed cement) etc. that foams certainly.The major advantage of these materials be thermal and insulating performance good, can adopt in-place forming plastering technique, operating efficiency height, cost is low, technology is simple, fire resistance good (A level lagging material), but also there is technological deficiency in these heat preservation slurries, mainly be that thermal conductivity is higher, water-intake rate is big, freeze-thaw resistance is poor.
Summary of the invention
The purpose of this invention is to provide plastic film microvesicle heat preservation slurry that a kind of thermal conductivity is low, water-intake rate is little and freeze-thaw resistance is good and preparation method thereof.
For achieving the above object, the technical solution used in the present invention is:
A kind of plastic film microvesicle heat preservation slurry is mixed by slurry main body, plastic film microvesicle and water; Described slurry main body is made up of the component of following weight percent content: gelling material 60～80%, flyash 5～20%, redispersable latex powder 0.5～3%, water reducer 0.1～0.5%, PP fiber 0.1～0.5%; Described plastic film microvesicle is 10～20% of slurry weight, and described plastic film microvesicle is plastics film bubble ball, is carbon dioxide in the bubble ball.
Described bubble spherical diameter is 2mm～6mm, and packing density is 20kg/m3～30 kg/m3.
The water cement ratio of described slurry is 0.5～0.7.
Described gelling material is 52.5 ordinary Portland cements, and described flyash is grade more than 2 grades or 2 grades.
The preparation method of above-mentioned plastic film microvesicle heat preservation slurry may further comprise the steps:
(1), slurry main body and water are stirred;
(2), will stir in plastic film microvesicle adding step (1) the gained slurry.
Described bubble spherical diameter is 2mm～6mm, and packing density is 20kg/m3～30 kg/m3.
7. plastic film microvesicle heat preservation slurry as claimed in claim 6 is characterized in that, the water cement ratio of described slurry is 0.5～0.7.
Described gelling material is 52.5 ordinary Portland cements, and described flyash is grade more than 2 grades or 2 grades.
Among the present invention, heat preservation slurry is mixed by slurry main body, plastic film microvesicle and water, and the plastic film microvesicle that utilizes filling arbon dioxide can reduce the material thermal conductivity value greatly as the main light filler of heat preservation slurry, reduces water-intake rate, improves freeze-thaw resistance; When plastic film microvesicle heat preservation slurry prepares among the present invention, earlier slurry main body and water are stirred, stir in the slurry that the adding of plastic film microvesicle is stirred again, can reduce plastic film microvesicle churning time, reduce the breakage rate of plastic film microvesicle in whipping process; The method that employing was manually plastered or mechanically spraying is plastered after this heat preservation slurry configured is covered on the external wall and gets final product, the operating efficiency height, and cost is low, and technology is simple.
Among the present invention, it is 2mm～6mm that described bubble ball requires diameter, and packing density is 20kg/m3～30 kg/m3.Bubble spherical diameter size is relevant with the heat preservation slurry grating, and reasonably grating can improve degree of compactness and the intensity of heat preservation slurry finished product.The size of bubble ball tap density depends primarily on the thickness of bubble membranous wall, and the too thin bubble of bubble membranous wall is broken easily, and the bubble membranous wall is too thick can to increase cost.Filling arbon dioxide gas purpose is to reduce the thermal conductivity of material in the bubble ball, because the thermal conductivity of carbonic acid gas is 0.0137 W/(mK), and the thermal conductivity of air is 0.0233 W/(mK), filling arbon dioxide gas can reduce heat preservation slurry finished product thermal conductivity 1/3rd in the bubble ball.
Embodiment
Embodiment 1:
A kind of plastic film microvesicle heat preservation slurry is mixed by slurry main body, plastic film microvesicle and water; The slurry main body is made up of the component of following weight percent content: gelling material 60%, flyash 17%, redispersable latex powder 2%, water reducer 0.5%, PP fiber 0.5%, the weight percent content of plastic film microvesicle are 20%.The plastic film microvesicle is plastics film bubble ball, is carbon dioxide in the bubble ball, and the bubble spherical diameter is 2mm～6mm, and packing density is 20kg/m3～30 kg/m3.Gelling material is 52.5 ordinary Portland cements.Flyash is grade more than 2 grades or 2 grades.Water cement ratio is 0.5～0.7.
The preparation preparation method of above-mentioned plastic film microvesicle heat preservation slurry may further comprise the steps:
(1), the slurry main body is stirred by water cement ratio 0.5～0.7 and water;
(2), be that 20% plastic film microvesicle adds to stir in the cement slurry that stirs and both can make described heat preservation slurry with weight percent content.
According to corresponding standard every performance of plastic film microvesicle heat preservation slurry with above-mentioned prescription is tested, the result is referring to table 1.
Table 1
| Test item | Unit | Performance index | Testing standard |
| Dry density | kg/m3 | ≤150 | GB/T5486 |
| Thermal conductivity | W/（m·K） | ≤0.034 | GB/T 10294 |
| Ultimate compression strength | MPa | ≥0.20 | GB/T5486 |
| Water-intake rate | v/v | ≤3.00 | GB/T5486 |
| Freeze-thaw resistance | 30 freeze-thaw cycle | Do not have and destroy | JGJ70 |
Embodiment 2: a kind of plastic film microvesicle heat preservation slurry is mixed by slurry main body, plastic film microvesicle and water; The slurry main body is made up of the component of following weight percent content: gelling material 70%, flyash 12%, redispersable latex powder 2%, water reducer 0.5%, PP fiber 0.5%, the weight percent content of plastic film microvesicle are 15%.The plastic film microvesicle is plastics film bubble ball, is carbon dioxide in the bubble ball, and the bubble spherical diameter is 2mm～6mm, and packing density is 20kg/m3～30 kg/m3.Gelling material is 52.5 ordinary Portland cements.Flyash is grade more than 2 grades or 2 grades.Water cement ratio is 0.5～0.7.
The preparation preparation method of above-mentioned plastic film microvesicle heat preservation slurry may further comprise the steps:
(1), the slurry main body is stirred by water cement ratio 0.5～0.7 and water;
(2), be that 5% plastic film microvesicle adds to stir in the cement slurry that stirs and both can make described heat preservation slurry with weight percent content.
According to corresponding standard every performance of plastic film microvesicle heat preservation slurry with above-mentioned prescription is tested, the result is referring to table 2.
Table 2
| Test item | Unit | Performance index | Testing standard |
| Dry density | kg/m3 | ≤180 | GB/T5486 |
| Thermal conductivity | W/（m·K） | ≤0.037 | GB/T 10294 |
| Ultimate compression strength | MPa | ≥0.35 | GB/T5486 |
| Water-intake rate | v/v | ≤3.00 | GB/T5486 |
| Freeze-thaw resistance | 30 freeze-thaw cycle | Do not have and destroy | JGJ70 |
Embodiment 3: a kind of plastic film microvesicle heat preservation slurry is mixed by slurry main body, plastic film microvesicle and water; The slurry main body is made up of the component of following weight percent content: gelling material 80%, flyash 5%, redispersable latex powder 2%, water reducer 0.5%, PP fiber 0.5%, the weight percent content of plastic film microvesicle are 10%.The plastic film microvesicle is plastics film bubble ball, is carbon dioxide in the bubble ball, and the bubble spherical diameter is 2mm～6mm, and packing density is 20kg/m3～30 kg/m3.Gelling material is 52.5 ordinary Portland cements.Flyash is grade more than 2 grades or 2 grades.Water cement ratio is 0.5～0.7.
The preparation preparation method of above-mentioned plastic film microvesicle heat preservation slurry may further comprise the steps:
(1), the slurry main body is stirred by water cement ratio 0.5～0.7 and water;
(2), be that 4% plastic film microvesicle adds to stir in the cement slurry that stirs and both can make described heat preservation slurry with weight percent content.
According to corresponding standard every performance of plastic film microvesicle heat preservation slurry with above-mentioned prescription is tested, the result is referring to table 3.
Table 3
| Test item | Unit | Performance index | Test method |
| Dry density | kg/m3 | ≤250 | GB/T5486 |
| Thermal conductivity | W/（m·K） | ≤0.040 | GB/T 10294 |
| Ultimate compression strength | MPa | ≥0.38 | GB/T5486 |
| Water-intake rate | v/v | ≤3.00 | GB/T5486 |
| Freeze-thaw resistance | 15 freeze-thaw cycle | Do not have and destroy | JGJ70 |
Among the present invention, the preparation of plastic film microvesicle can be adopted blown film mechanism film, use the air-cooled gas of blown film instead carbon dioxide, take off roll are repacked into bubble chamber film machine flower rumble roller, play traction, bubble processed, hot pressing, cut-out function simultaneously, taking the vacuum suck demoulding to be prepared into diameter is 2mm～6mm, thickness 0.01mm～0.1mm polyethylene foam ball.
Claims (2)
1. a plastic film microvesicle heat preservation slurry is characterized in that, is mixed by slurry main body, plastic film microvesicle and water; The slurry main body is made up of the component of following weight percent content: gelling material 60%, flyash 17%, redispersable latex powder 2%, water reducer 0.5%, PP fiber 0.5%, the weight percent content of plastic film microvesicle are 20%; The plastic film microvesicle is plastics film bubble ball, is carbon dioxide in the bubble ball, and the bubble spherical diameter is 2mm～6mm, and packing density is 20kg/m3～30 kg/m3; Gelling material is 52.5 ordinary Portland cements; Flyash is grade more than 2 grades or 2 grades; Water cement ratio is 0.5～0.7; The preparation preparation method of above-mentioned plastic film microvesicle heat preservation slurry may further comprise the steps: (1), slurry main body and water are stirred; (2), stir in the cement slurry that the adding of plastic film microvesicle is stirred.
2. a plastic film microvesicle heat preservation slurry is characterized in that, is mixed by slurry main body, plastic film microvesicle and water; The slurry main body is made up of the component of following weight percent content: gelling material 70%, flyash 12%, redispersable latex powder 2%, water reducer 0.5%, PP fiber 0.5%, the weight percent content of plastic film microvesicle are 15%; The plastic film microvesicle is plastics film bubble ball, is carbon dioxide in the bubble ball, and the bubble spherical diameter is 2mm～6mm, and packing density is 20kg/m3～30 kg/m3; Gelling material is 52.5 ordinary Portland cements; Flyash is grade more than 2 grades or 2 grades; Water cement ratio is 0.5～0.7; The preparation preparation method of above-mentioned plastic film microvesicle heat preservation slurry may further comprise the steps: (1), slurry main body and water are stirred; (2), stir in the cement slurry that the adding of plastic film microvesicle is stirred.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182173A (en) * | 2007-11-30 | 2008-05-21 | 东南大学 | Key technology scheme according to improvement for insulation and material mechanics performance of aerated concrete |
| CN101948281A (en) * | 2010-07-27 | 2011-01-19 | 辽宁考克环保节能建材有限公司 | Cement polymer foam plastic powder light heat-insulating plate and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182173A (en) * | 2007-11-30 | 2008-05-21 | 东南大学 | Key technology scheme according to improvement for insulation and material mechanics performance of aerated concrete |
| CN101948281A (en) * | 2010-07-27 | 2011-01-19 | 辽宁考克环保节能建材有限公司 | Cement polymer foam plastic powder light heat-insulating plate and preparation method thereof |
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Address after: 450002 No. 97, Wenhua Road, Henan, Zhengzhou Patentee after: Zhengzhou University Multi-Functional Design and Research Academy Co., Ltd. Address before: 450002 No. 97, Wenhua Road, Henan, Zhengzhou Patentee before: Zhengzhou University Multi-Functional Design and Research Academy |