CN104294942B - Composite evacuated heat insulating board of foam cement and preparation method thereof - Google Patents

Composite evacuated heat insulating board of foam cement and preparation method thereof Download PDF

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Publication number
CN104294942B
CN104294942B CN201410622758.9A CN201410622758A CN104294942B CN 104294942 B CN104294942 B CN 104294942B CN 201410622758 A CN201410622758 A CN 201410622758A CN 104294942 B CN104294942 B CN 104294942B
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Prior art keywords
foam cement
cement
mortar
insulating plate
vacuum heat
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CN104294942A (en
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翟传伟
李壮贤
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Anhui Keruike Thermal Insulation Material Co., Ltd.
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ANHUI KERUIKE THERMAL INSULATION MATERIAL Co Ltd
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Priority to CN201210449509.5A priority Critical patent/CN102979205B/en
Priority to CN201410622758.9A priority patent/CN104294942B/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/24Structural elements or technologies for improving thermal insulation
    • Y02A30/242Slab shaped vacuum insulation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/10Insulation, e.g. vacuum or aerogel insulation

Abstract

The present invention relates to the composite evacuated heat insulating board of a kind of foam cement, comprise vacuum heat-insulating plate and the foam cement being coated on its periphery; Described vacuum heat-insulating plate comprises core, high strength gas barrier film and boundary mortar, described high strength gas barrier film is wrapped in the periphery of core, and and by vacuumizing encapsulation between core, be coated with one deck boundary mortar in the periphery of described high strength gas barrier film, the thickness of this boundary mortar is 2 ~ 3mm.Advantage of the present invention is: the problem solving vacuum heat-insulating plate breakage gas leakage in work progress, construction install convenience, and it has excellent heat insulating ability, water resistance, durability and frost resistance, and burning grade is not for firing or difficult combustion, and fireproof performance is excellent.

Description

Composite evacuated heat insulating board of foam cement and preparation method thereof
Technical field
The present invention relates to a kind of external wall compound insulating material, definite is composite evacuated heat insulating board of a kind of foam cement and preparation method thereof.
Technical background
Vacuum heat-insulating plate fire-protection rating common at present can be up to state standards and not fire or difficult combustion, and heat insulation effect is good.But they are easily scraped off in work progress, occur hollowing, gas leak phenomenon, utilization rate reduces greatly.
Summary of the invention
The object of the invention is the damage phenomenon occurred in work progress to overcome vacuum heat-insulating material, providing a kind of easy construction, good effect of heat insulation, the composite evacuated heat insulating board of A level fireproof foam cement.Technical scheme of the present invention is: the composite evacuated heat insulating board of a kind of foam cement, is characterized in that: comprise vacuum heat-insulating plate and the foam cement being coated on its periphery.
Described vacuum heat-insulating plate comprises core, high strength gas barrier film and boundary mortar, described high strength gas barrier film is wrapped in the periphery of core, and and by vacuumizing encapsulation between core, be coated with one deck boundary mortar in the periphery of described high strength gas barrier film, the thickness of this boundary mortar is 0.1 ~ 3mm.
Described vacuum heat-insulating plate comprises core and high strength gas barrier film, and described high strength gas barrier film is wrapped in the periphery of core, and and by vacuumizing encapsulation between core.
Described boundary mortar is prepared by the following method and obtains, take following raw material: cement 30 ~ 45 parts, 30-50 object quartz sand 5 ~ 10 parts, coarse whiting 7 ~ 10 parts, SILICA FUME 3 ~ 5 parts, rubber powder 4 ~ 7 parts, Admixture 3 parts, emulsion 15 ~ 20 parts, by the abundant mix and blend of each raw material after taking, to obtain final product.
Cement in described boundary mortar adopts one or more mixtures formed in any proportion in portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, magnesia cement, high strength gypsum.
Described Admixture is the mixture obtained after polypropylene fibre, tartaric acid, hydroxypropyl methylcellulose, lignin and polyvinyl alcohol combine in any proportion.
Described foam cement is each component composition of following weight portion: cement 50-70 part, flyash 20-30 part, rubber powder 4-8 part, coarse whiting 8-15 part, calcium stearate 1-3 part, accelerating admixture 0.5-1 part, hydrophober 0.2-0.5 part, hydroxypropyl methylcellulose 0.5-1 part, polypropylene fibre 0.2-0.5 part.
Described cement adopts one or more mixtures formed in any proportion in portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, magnesia cement, high strength gypsum.
Described hydrophober is any one in calcium stearate, zinc stearate, silylation powder additive.
The grog that described accelerating admixture is bauxite, quicklime, soda ash are fired in any proportion.
The length of described polypropylene fibre is 6mm or 9mm.
A preparation method for the composite evacuated heat insulating board of foam cement, comprises the following steps:
(1), after each component preparing foam cement being weighed, fully mix, obtain mixture;
(2) put in mixer after being mixed with water by the mixture obtained in step (1) and stir 10min, ensure fully to mix, the mass ratio of mixture that wherein water and above-mentioned each component form is 1:1.5;
(3) foam cement mortar is prepared: be that the ratio of 1:25 mixes with weight ratio by water and blowing agent, at the pressure lower frothing of 0.2Mpa, mix with mixture paste, fully stir, namely obtain foam cement mortar; Described blowing agent is any one in calcium carbonate, magnesium carbonate, sodium acid carbonate, silicate of soda, carborundum, carbon black;
(4) mould of specification is got, the foam cement mortar that one deck 2-15mm is thick is first divided in bottom surface, put into the vacuum heat-insulating plate of specification again, the area of this vacuum heat-insulating plate is less than the area of mould, and six of vacuum heat-insulating plate all keep identical distance 5-15mm with between mould, then the foam cement mortar that 2-15mm is thick is built in the above, also built the foam cement mortar that at least 2mm is thick between side and template for other four of vacuum insulation panel simultaneously, make foam cement mortar by coated for whole vacuum heat-insulating plate, form overcoat, then the demoulding after standing 8-24 h, maintenance 3-28 days is covered with common plastic film again under natural environmental condition, namely the composite evacuated heat insulating board of foam cement is obtained.
A preparation method for the composite evacuated heat insulating board of foam cement, comprises the following steps:
(1), after each component preparing foam cement being weighed, fully mix, obtain mixture;
(2) put in mixer after being mixed with water by the mixture obtained in step (1) and stir 10min, ensure fully to mix, the mass ratio of mixture that wherein water and above-mentioned each component form is 1:1.5;
(3) foam cement mortar is prepared: be that the ratio of 1:25 mixes with weight ratio by water and blowing agent, at the pressure lower frothing of 0.2Mpa, mix with mixture paste, fully stir, namely obtain foam cement mortar; Described blowing agent is any one in calcium carbonate, magnesium carbonate, sodium acid carbonate, silicate of soda, carborundum, carbon black;
(4) mould of specification is got, the foam cement mortar that one deck 2-15mm is thick is first divided in bottom surface, put into the vacuum heat-insulating plate of specification again, the area of this vacuum heat-insulating plate is the same with the area of mould, and four of vacuum heat-insulating plate sides just in time contact with mould, then the foam cement mortar that 2-15mm is thick is built in the above, make foam cement mortar by coated for whole vacuum heat-insulating plate upper and lower surfaces, form overcoat, then the demoulding after standing 8-24 h, maintenance 3-28 days is covered with common plastic film again under natural environmental condition, namely the composite evacuated heat insulating board of foam cement is obtained.
Advantage of the present invention is: the problem solving vacuum heat-insulating plate breakage gas leakage in work progress, construction install convenience, and it has excellent heat insulating ability, water resistance, durability and frost resistance, and burning grade is not for firing or difficult combustion, and fireproof performance is excellent.
Detailed description of the invention
Embodiment 1:
The composite evacuated heat insulating board of a kind of foam cement, comprises vacuum heat-insulating plate and the foam cement being coated on its periphery.
Described vacuum heat-insulating plate comprises core, high strength gas barrier film and boundary mortar, described high strength gas barrier film is wrapped in the periphery of core, and and by vacuumizing encapsulation between core, be coated with one deck boundary mortar in the periphery of described high strength gas barrier film, the thickness of this boundary mortar is 0.1 ~ 3mm.
Described core is by microfine silica powder 40-90wt%, inserts 0-45wt%, inorganic core material 0-20wt%, fiber 1-18wt%, getter 0-3wt%, vacuum stabilizer 0-3wt%.
Described microfine silica powder is one or more mixtures according to arbitrary proportion mixing composition in silica flour, silicon ash, pozzolan, SILICA FUME, perlite powder, SiO 2 powder, its bulk density is 80-280kg/m3, specific area is 10-39m2/g, and average grain diameter is 0.1-2 micron.
Described inserts is one or more mixtures according to arbitrary proportion composition in flyash, expanded perlite, close hole perlite, glass bead, sawdust, wood chip, crop stalk crushed material, shredded paper bits, glass wool chip, foam, rock wool debris, granules of polystyrene, dry mud, kieselguhr, super glass wool, centrifugally glass-wool, rock wool, aluminic acid aluminum fiber, ceramic fibre.
Described inorganic core material is one or more mixtures according to arbitrary proportion composition in aeroge, aerosil, precipitated silica, white carbon.
Described fiber is one or more mixtures according to arbitrary proportion composition in glass chopped silk, super glass wool, flame cotton, aluminium silicate wool, ceramic fiber cotton, brucite fiber, foam, cotton, synthetic cotton, its length is 3-12mm, and fibre diameter is 0.2-13 micron.
Described getter is one or more mixtures according to arbitrary proportion composition in active carbon, barium lithium alloy activator, calcium oxide, magnesia, silica gel.
Described vacuum stabilizer is a kind of or the two mixture according to arbitrary proportion composition in carborundum and superfine fibre active carbon material.
Described high strength gas barrier film is composited by the overcoat in outside and the sealant of inner side; Wherein, overcoat is composited by one or more in glass-fiber-fabric, non-woven fabrics, carbon-fiber cloth, basalt fiber cloth, ceramic fiber cloth, woven fabric; Sealant is composited by aluminium foil, aluminizer, polyester film, nylon film, polyethylene sheeting, polyvinyl chloride film, polystyrene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, ethylene-vinyl alcohol copolymer film, polycarbonate film, polyacrylic one or more.
Described boundary mortar is prepared by the following method and obtains, take following raw material: cement 30 ~ 45 parts, 30-50 object quartz sand 5 ~ 10 parts, coarse whiting 7 ~ 10 parts, SILICA FUME 3 ~ 5 parts, rubber powder 4 ~ 7 parts, Admixture 3 parts, emulsion 15 ~ 20 parts, by the abundant mix and blend of each raw material after taking, to obtain final product.
Cement in described boundary mortar adopts one or more mixtures formed in any proportion in portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, magnesia cement, high strength gypsum.
Described Admixture is the mixture obtained after polypropylene fibre, tartaric acid, hydroxypropyl methylcellulose, lignin and polyvinyl alcohol combine in any proportion.
Described foam cement is each component composition of following weight portion: cement 50-70 part, flyash 20-30 part, rubber powder 4-8 part, coarse whiting 8-15 part, calcium stearate 1-3 part, accelerating admixture 0.5-1 part, hydrophober 0.2-0.5 part, hydroxypropyl methylcellulose 0.5-1 part, polypropylene fibre 0.2-0.5 part.
Described cement adopts one or more mixtures formed in any proportion in portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, magnesia cement, high strength gypsum.
Described hydrophober is any one in calcium stearate, zinc stearate, silylation powder additive.
The grog that described accelerating admixture is bauxite, quicklime, soda ash are fired in any proportion.
The length of described polypropylene fibre is 6mm or 9mm.
A preparation method for the composite evacuated heat insulating board of foam cement, comprises the following steps:
(1), after each component preparing foam cement being weighed, fully mix, obtain mixture;
(2) put in mixer after being mixed with water by the mixture obtained in step (1) and stir 10min, ensure fully to mix, the mass ratio of mixture that wherein water and above-mentioned each component form is 1:1.5;
(3) foam cement mortar is prepared: be that the ratio of 1:25 mixes with weight ratio by water and blowing agent, at the pressure lower frothing of 0.2Mpa, mix with mixture paste, fully stir, namely obtain foam cement mortar; Described blowing agent is any one in calcium carbonate, magnesium carbonate, sodium acid carbonate, silicate of soda, carborundum, carbon black;
(4) mould of specification is got, the foam cement mortar that one deck 2-15mm is thick is first divided in bottom surface, put into the vacuum heat-insulating plate of specification again, the area of this vacuum heat-insulating plate is less than the area of mould, and six of vacuum heat-insulating plate all keep identical distance 5-15mm with between mould, then the foam cement mortar that 2-15mm is thick is built in the above, also built the foam cement mortar that at least 2mm is thick between side and template for other four of vacuum insulation panel simultaneously, make foam cement mortar by coated for whole vacuum heat-insulating plate, form overcoat, then the demoulding after standing 8-24 h, maintenance 3-28 days is covered with common plastic film again under natural environmental condition, namely the composite evacuated heat insulating board of foam cement is obtained.
Embodiment 2:
The composite evacuated heat insulating board of a kind of foam cement, comprises vacuum heat-insulating plate and the foam cement being coated on its periphery.
Described vacuum heat-insulating plate comprises core and high strength gas barrier film, and described high strength gas barrier film is wrapped in the periphery of core, and and by vacuumizing encapsulation between core.
Described core is by microfine silica powder 40-90wt%, inserts 0-45wt%, inorganic core material 0-20wt%, fiber 1-18wt%, getter 0-3wt%, vacuum stabilizer 0-3wt%.
Described microfine silica powder is one or more mixtures according to arbitrary proportion mixing composition in silica flour, silicon ash, pozzolan, SILICA FUME, perlite powder, SiO 2 powder, its bulk density is 80-280kg/m3, specific area is 10-39m2/g, and average grain diameter is 0.1-2 micron.
Described inserts is one or more mixtures according to arbitrary proportion composition in flyash, expanded perlite, close hole perlite, glass bead, sawdust, wood chip, crop stalk crushed material, shredded paper bits, glass wool chip, foam, rock wool debris, granules of polystyrene, dry mud, kieselguhr, super glass wool, centrifugally glass-wool, rock wool, aluminic acid aluminum fiber, ceramic fibre.
Described inorganic core material is one or more mixtures according to arbitrary proportion composition in aeroge, aerosil, precipitated silica, white carbon.
Described fiber is one or more mixtures according to arbitrary proportion composition in glass chopped silk, super glass wool, flame cotton, aluminium silicate wool, ceramic fiber cotton, brucite fiber, foam, cotton, synthetic cotton, its length is 3-12mm, and fibre diameter is 0.2-13 micron.
Described getter is one or more mixtures according to arbitrary proportion composition in active carbon, barium lithium alloy activator, calcium oxide, magnesia, silica gel.
Described vacuum stabilizer is a kind of or the two mixture according to arbitrary proportion composition in carborundum and superfine fibre active carbon material.
Described high strength gas barrier film is composited by the overcoat in outside and the sealant of inner side; Wherein, overcoat is composited by one or more in glass-fiber-fabric, non-woven fabrics, carbon-fiber cloth, basalt fiber cloth, ceramic fiber cloth, woven fabric; Sealant is composited by aluminium foil, aluminizer, polyester film, nylon film, polyethylene sheeting, polyvinyl chloride film, polystyrene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, ethylene-vinyl alcohol copolymer film, polycarbonate film, polyacrylic one or more.
Described foam cement is each component composition of following weight portion: cement 50-70 part, flyash 20-30 part, rubber powder 4-8 part, coarse whiting 8-15 part, calcium stearate 1-3 part, accelerating admixture 0.5-1 part, hydrophober 0.2-0.5 part, hydroxypropyl methylcellulose 0.5-1 part, polypropylene fibre 0.2-0.5 part.
Described cement adopts one or more mixtures formed in any proportion in portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, magnesia cement, high strength gypsum.
Described hydrophober is any one in calcium stearate, zinc stearate, silylation powder additive.
The grog that described accelerating admixture is bauxite, quicklime, soda ash are fired in any proportion.
The length of described polypropylene fibre is 6mm or 9mm.
A preparation method for the composite evacuated heat insulating board of foam cement, comprises the following steps:
(1), after each component preparing foam cement being weighed, fully mix, obtain mixture;
(2) put in mixer after being mixed with water by the mixture obtained in step (1) and stir 10min, ensure fully to mix, the mass ratio of mixture that wherein water and above-mentioned each component form is 1:1.5;
(3) foam cement mortar is prepared: be that the ratio of 1:25 mixes with weight ratio by water and blowing agent, at the pressure lower frothing of 0.2Mpa, mix with mixture paste, fully stir, namely obtain foam cement mortar; Described blowing agent is any one in calcium carbonate, magnesium carbonate, sodium acid carbonate, silicate of soda, carborundum, carbon black;
(4) mould of specification is got, the foam cement mortar that one deck 2-15mm is thick is first divided in bottom surface, put into the vacuum heat-insulating plate of specification again, the area of this vacuum heat-insulating plate is the same with the area of mould, and four of vacuum heat-insulating plate sides just in time contact with mould, then the foam cement mortar that 2-15mm is thick is built in the above, make foam cement mortar by coated for whole vacuum heat-insulating plate upper and lower surfaces, form overcoat, then the demoulding after standing 8-24 h, maintenance 3-28 days is covered with common plastic film again under natural environmental condition, namely the composite evacuated heat insulating board of foam cement is obtained.

Claims (10)

1. the composite evacuated heat insulating board of foam cement, is characterized in that: comprise vacuum heat-insulating plate and the foam cement being coated on its periphery; Described foam cement is each component composition of following weight portion: cement 50-70 part, flyash 20-30 part, rubber powder 4-8 part, coarse whiting 8-15 part, calcium stearate 1-3 part, accelerating admixture 0.5-1 part, hydrophober 0.2-0.5 part, hydroxypropyl methylcellulose 0.5-1 part, polypropylene fibre 0.2-0.5 part.
2. the composite evacuated heat insulating board of foam cement according to claim 1, it is characterized in that: described vacuum heat-insulating plate comprises core, high strength gas barrier film and boundary mortar, described high strength gas barrier film is wrapped in the periphery of core, and and by vacuumizing encapsulation between core, be coated with one deck boundary mortar in the periphery of described high strength gas barrier film, the thickness of this boundary mortar is 0.1 ~ 3mm.
3. the composite evacuated heat insulating board of foam cement according to claim 1, it is characterized in that: described vacuum heat-insulating plate comprises core and high strength gas barrier film, described high strength gas barrier film is wrapped in the periphery of core, and and by vacuumizing encapsulation between core.
4. the composite evacuated heat insulating board of foam cement according to claim 2, it is characterized in that: described boundary mortar is prepared by the following method and obtains, take following raw material: cement 30 ~ 45 parts, 30-50 object quartz sand 5 ~ 10 parts, coarse whiting 7 ~ 10 parts, SILICA FUME 3 ~ 5 parts, rubber powder 4 ~ 7 parts, Admixture 3 parts, emulsion 15 ~ 20 parts, by the abundant mix and blend of each raw material after taking, to obtain final product.
5. the composite evacuated heat insulating board of foam cement according to claim 4, is characterized in that: the cement in described boundary mortar adopts one or more mixtures formed in any proportion in portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, magnesia cement, high strength gypsum.
6. the composite evacuated heat insulating board of foam cement according to claim 5, is characterized in that: described Admixture is the mixture obtained after polypropylene fibre, tartaric acid, hydroxypropyl methylcellulose, lignin and polyvinyl alcohol combine in any proportion.
7. the composite evacuated heat insulating board of foam cement according to claim 1, is characterized in that: described cement adopts one or more mixtures formed in any proportion in portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, magnesia cement, high strength gypsum;
Described hydrophober is any one in calcium stearate, zinc stearate, silylation powder additive;
The grog that described accelerating admixture is bauxite, quicklime, soda ash are fired in any proportion.
8. the composite evacuated heat insulating board of foam cement according to claim 7, is characterized in that: the length of described polypropylene fibre is 6mm or 9mm.
9. a preparation method for the composite evacuated heat insulating board of the foam cement as described in one of claim 2-8, is characterized in that: comprise the following steps:
(1), after each component preparing foam cement being weighed, fully mix, obtain mixture;
(2) put in mixer after being mixed with water by the mixture obtained in step (1) and stir 10min, ensure fully to mix, the mass ratio of mixture that wherein water and above-mentioned each component form is 1:1.5;
(3) foam cement mortar is prepared: be that the ratio of 1:25 mixes with weight ratio by water and blowing agent, at the pressure lower frothing of 0.2Mpa, mix with mixture paste, fully stir, namely obtain foam cement mortar; Described blowing agent is any one in calcium carbonate, magnesium carbonate, sodium acid carbonate, silicate of soda, carborundum, carbon black;
(4) mould of specification is got, the foam cement mortar that one deck 2-15mm is thick is first divided in bottom surface, put into the vacuum heat-insulating plate of specification again, the area of this vacuum heat-insulating plate is less than the area of mould, and six of vacuum heat-insulating plate all keep identical distance 5-15mm with between mould, then the foam cement mortar that 2-15mm is thick is built in the above, also built the foam cement mortar that at least 2mm is thick between side and template for other four of vacuum insulation panel simultaneously, make foam cement mortar by coated for whole vacuum heat-insulating plate, form overcoat, then the demoulding after standing 8-24 h, maintenance 3-28 days is covered with common plastic film again under natural environmental condition, namely the composite evacuated heat insulating board of foam cement is obtained.
10. a preparation method for the composite evacuated heat insulating board of the foam cement as described in one of claim 2-8, is characterized in that: comprise the following steps:
(1), after each component preparing foam cement being weighed, fully mix, obtain mixture;
(2) put in mixer after being mixed with water by the mixture obtained in step (1) and stir 10min, ensure fully to mix, the mass ratio of mixture that wherein water and above-mentioned each component form is 1:1.5;
(3) foam cement mortar is prepared: be that the ratio of 1:25 mixes with weight ratio by water and blowing agent, at the pressure lower frothing of 0.2Mpa, mix with mixture paste, fully stir, namely obtain foam cement mortar; Described blowing agent is any one in calcium carbonate, magnesium carbonate, sodium acid carbonate, silicate of soda, carborundum, carbon black;
(4) mould of specification is got, the foam cement mortar that one deck 2-15mm is thick is first divided in bottom surface, put into the vacuum heat-insulating plate of specification again, the area of this vacuum heat-insulating plate is the same with the area of mould, and four of vacuum heat-insulating plate sides just in time contact with mould, then the foam cement mortar that 2-15mm is thick is built in the above, make foam cement mortar by coated for whole vacuum heat-insulating plate upper and lower surfaces, form overcoat, then the demoulding after standing 8-24 h, maintenance 3-28 days is covered with common plastic film again under natural environmental condition, namely the composite evacuated heat insulating board of foam cement is obtained.
CN201410622758.9A 2012-11-12 2012-11-12 Composite evacuated heat insulating board of foam cement and preparation method thereof Active CN104294942B (en)

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