CN105622015A - Production technology for physical foaming cement insulation boards - Google Patents
Production technology for physical foaming cement insulation boards Download PDFInfo
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- CN105622015A CN105622015A CN201511013318.4A CN201511013318A CN105622015A CN 105622015 A CN105622015 A CN 105622015A CN 201511013318 A CN201511013318 A CN 201511013318A CN 105622015 A CN105622015 A CN 105622015A
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- physical foaming
- warming plate
- production technique
- foaming cement
- plate production
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- 239000004568 cement Substances 0.000 title claims abstract description 40
- 238000005187 foaming Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000009413 insulation Methods 0.000 title abstract description 9
- 238000005516 engineering process Methods 0.000 title abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000654 additive Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 claims abstract description 19
- 239000006260 foam Substances 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 239000011343 solid material Substances 0.000 claims abstract description 15
- 238000001238 wet grinding Methods 0.000 claims abstract description 15
- 239000011398 Portland cement Substances 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 42
- 239000000839 emulsion Substances 0.000 claims description 39
- 150000001875 compounds Chemical class 0.000 claims description 36
- 238000010792 warming Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 15
- -1 polypropylene Polymers 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 10
- 229910052602 gypsum Inorganic materials 0.000 claims description 10
- 239000010440 gypsum Substances 0.000 claims description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 8
- 108010082495 Dietary Plant Proteins Proteins 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 6
- 230000003020 moisturizing effect Effects 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 claims description 5
- 229920001038 ethylene copolymer Polymers 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 2
- 239000004088 foaming agent Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 abstract description 13
- 239000006185 dispersion Substances 0.000 abstract description 6
- 238000009775 high-speed stirring Methods 0.000 abstract description 6
- 239000006210 lotion Substances 0.000 abstract 3
- 238000007605 air drying Methods 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 2
- 239000012466 permeate Substances 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000000740 bleeding effect Effects 0.000 abstract 1
- 239000011489 building insulation material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 11
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- 239000011381 foam concrete Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 210000000795 conjunctiva Anatomy 0.000 description 6
- 230000035699 permeability Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 4
- 238000012858 packaging process Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000009172 bursting Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
- C04B38/106—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4857—Other macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The invention discloses a production technology for physical foaming cement insulation boards, and belongs to the field of building insulation materials. The technology comprises the steps that 1, general purpose portland cement, a composite aluminosilicate mineral admixture and a composite additive are metered and prestirred to obtain solid materials, and water is added for wet grinding to obtain non-bleeding unstratified slurry; 2, fiber is added into the slurry, and then high-speed stirring and dispersion are performed; then, foams with the diameter smaller than 0.3 mm are added to form foam bodies; 3, the foams obtained in the second step are molded by means of a mold, maintained and demolded and then cut into boards, high-molecular polymer waterproof lotion uniformly permeates microholes of the boards, and artificial drying or natural air-drying is performed to obtain the physical foaming cement insulation boards. According to the technology, high-pressure permeation equipment is adopted for enabling the high-molecular polymer waterproof lotion to rapidly and uniformly permeate the microholes of the boards, polymer inside the lotion will form films on the walls of the microholes after artificial drying or natural air-drying, passages of pores are blocked, the water absorption rate of the insulation boards can be effectively lowered, the toughness and strength of the boards can be improved, and board cracks are avoided.
Description
Technical field
The invention belongs to building thermal insulation material field, it is specifically related to a kind of physical foaming cement warming plate production technique.
Background technology
Oneself state exterior-wall heat insulation has caught fire since using organic foam warming plate repeatedly, causes massive losses to our people's lives and properties, and for this reason, fire department of country has issued (65 [2011]) number literary composition, it is desired to " forbidding organic foam warming plate ". This is filled with powerful impellent to the development of foamed concrete warming plate. Along with appearance and the enforcement of China's wall reform and building energy conservation policy, and be subject to the impact of building fire, modern energy-conservation green building is badly in need of that excellent thermal insulation performance, profit are useless, lightweight do not fire lagging material. Foamed concrete, as a kind of novel material of construction, can meet above-mentioned performance, but there is the problems such as thermal and insulating performance is poor, raw materials consumption amount is bigger.
Super light foamed concrete because porosity is higher, raw material usage is lower, cost is lower, technique is simple, green, sound insulation, antidetonation, the advantage such as fire prevention enjoy heat insulating industry to favor. in prior art, often based on early solidifying special cement (aluminosulfate cement, ferro-aluminate cement etc.) strong, fast for gelling material, chemical foaming mode is adopted to prepare super light foamed concrete, such as publication number is CN101508593A disclosed " foamed concrete of a kind of extremely-low density and its preparation method ", prepared by employing chemical foaming, molding control is difficult, and is only applicable to the production of prefabrication. adopting aluminosulfate cement on the other hand, this cement is special cement, and special cement resource is relatively deficient, cost height, and there is endurance issues, hinders the development of super light foamed concrete. the Novel foam concrete adopting physical blowing to prepare has good workability, not only can be prefabricated but also can be cast-in-place, show great advantage for another example publication number be CN102515664A disclosed " low-cost ultra low density foam concrete ", though employing ordinary Portland cement, I or II flyash, the starting material such as graining blast-furnace cinder micro-powder, but the super light foamed concrete of the physics method of preparation needs to realize by adding swelling agent, commercially available swelling agent is of a great variety, quality is uneven, and mostly become through high-temperature firing, not only cost height, price is expensive, preparation energy consumption height, and also there is dispute in quality, practicality is poor.
Summary of the invention
It is an object of the invention to provide the physical foaming cement warming plate production technique of a kind of production efficiency height, good product performance.
Based on above-mentioned purpose, the present invention by the following technical solutions: a kind of physical foaming cement warming plate production technique, step is:
(1) by general purpose portland cement, compound aluminosilicate mineral adulterant, compound additive metering, stirring to obtain solid materials in advance, the wet-milling that adds water is obtained does not secrete water, not stratified slurry body;
(2) high-speed stirring dispersion after adding fiber in slurry body; Then the formation of foam bubble body that diameter is less than 0.3 millimeter is added;
(3) cut into sheet material after the bubble body obtained in step (2) being utilized mould molding, maintenance, the demoulding, high molecular polymer water-proof emulsion uniformly penetrating is entered in the micropore of sheet material, artificial drying or naturally air-dry and get final product.
Preferably, the mass ratio (0.6 ~ 1.0) of water and solid materials in step (1): 1, the time of wet-milling slurrying is 20 ~ 60min.
Preferably, bubble body utilizes maintenance 8h ~ 28d demoulding again under 20 ~ 100 DEG C of moisturizing constant temperature after die molding process in step (3).
Preferably, high molecular polymer water-proof emulsion described in step (3) is water-repellancy pure-acrylic emulsion, vinyl acetate emulsion (acrylate and vinyl acetate emulsion), benzene emulsion (cinnamic acrylic ester emulsion) and EVA(vinyl acetate-ethylene copolymer) one in emulsion, 1m3It is 5kg that bubble body prepares the consumption of high molecular polymer water-proof emulsion in the sheet material.
Preferably, described in step (1), compound aluminosilicate mineral adulterant is composited by metakaolin and flyash, and it is 50% ~ 70% that metakaolin accounts for the mass percent of compound aluminosilicate mineral adulterant.
Preferably, compound additive described in step (1) is composited by gypsum and calcium hydroxide, and it is 40% ~ 60% that gypsum accounts for the mass percent of compound additive.
Preferably, foam described in step (2) is prepared from foaming machine by whipping agent, and described whipping agent is vegetable-protein foaming agent.
Preferably, fiber described in step (2) is neutral alkaline-resisting polypropylene fibre.
Preferably, in solid materials described in step (1), the weight percent of each material is: general purpose portland cement 20 ~ 100%, compound aluminosilicate mineral adulterant 0 ~ 75%, surplus is compound additive.
Preferably, 1m in step (2)3Containing 0.5 ~ 0.75kg whipping agent, 0.8 ~ 1.5kg fiber in bubble body.
Compared with prior art, provided by the invention have the following advantages:
(1) production technique provided by the invention first carries out wet-milling slurrying before adding fiber, and wet-milling repulping rate is fast, only needs 20 ~ 60min just can make material particles fineness decline 2 ~ 3 times, improves production efficiency greatly, reduce production cost; And material can be made fully to mix, excitation material is active, it is to increase the activity index of material, favorably improves early stage and later strength; Meanwhile, through the slurry body of wet-milling, workability is good, does not secrete water, not stratified, subsequent technique realizes bubble hole independent completion, plays critical effect.
(2) rapid for high molecular polymer water-proof emulsion uniformly penetrating is entered in the micropore of sheet material, through artificial drying or naturally air-dry after, polymkeric substance in emulsion will on micro-pore wall conjunctiva, the passage of blocking pore, can effectively reduce the water-intake rate of warming plate, improve toughness and the intensity of sheet material, prevent sheet material from bursting.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
A kind of physical foaming cement warming plate production technique, step is:
(1) undertaken measuring, stirring to obtain solid materials in advance by general purpose portland cement 145kg, compound aluminosilicate mineral adulterant 0kg, compound additive 0kg, according to water and solid materials mass ratio 0.6: the 1 wet-milling 20min that adds water obtain and do not secrete water, not stratified slurry body;
(2) after adding neutral alkaline-resisting polypropylene fibre in slurry body high-speed stirring to fiber dispersion evenly after, add the formation of foam bubble body prepared diameter be less than 0.3 millimeter by the whipping agent being placed in foaming machine, 1m3Containing 0.5kg vegetable-protein whipping agent, the neutral alkaline-resisting polypropylene fibre of 1.35kg in bubble body;
(3) the bubble body obtained in step (2) is utilized mould molding, the maintenance 8h demoulding again under 100 DEG C of moisturizing constant temperature, obtained sheet material after cutting, adopt in the micropore that water-repellancy pure-acrylic emulsion uniformly penetrating is entered sheet material by high pressure permeability equipment, 1m3It is 5kg that bubble body prepares the consumption of water-repellancy pure-acrylic emulsion on the sheet material, artificial drying or naturally air-dry, the conjunctiva on micro-pore wall of the polymkeric substance in water-repellancy pure-acrylic emulsion, the passage of blocking pore;
(4) examination and test of products qualified after, carry out packaging process get product.
The dry apparent density preparing the physical foaming cement warming plate according to above-mentioned material amounts and production technique is 185kg/m3, thermal conductivity is 0.058W/ (m K), and ultimate compression strength is 0.36MPa, and volume water-intake rate is 4.5%, and according to " cement based foam heat-insulating board ", (JC/T2200-2013 carries out the testing method of every index.
Embodiment 2
A kind of physical foaming cement warming plate production technique, step is:
(1) by general purpose portland cement 97kg, compound aluminosilicate mineral adulterant 42kg(wherein metakaolin 21kg, flyash 21kg), compound additive 1.4kg (wherein gypsum 0.7kg, calcium hydroxide 0.7kg), namely the percentage composition of ordinary Portland cement is 69%, the percentage composition of compound aluminosilicate mineral adulterant is that wherein metakaolin accounts for the mass percent of compound aluminosilicate mineral adulterant to 30%((is 50%), the percentage composition of compound additive is 1% (wherein gypsum accounts for the mass percent of compound additive is 50%), measure, stir to obtain solid materials in advance, obtain do not secrete water according to the mass ratio 0.8: 1 of water and the solid materials wet-milling 30min that adds water, not stratified slurry body,
(2) after adding neutral alkaline-resisting polypropylene fibre in slurry body high-speed stirring to fiber dispersion evenly after, add the formation of foam bubble body prepared diameter be less than 0.3 millimeter by the whipping agent being placed in foaming machine, 1m3Containing 0.6kg vegetable-protein whipping agent, the neutral alkaline-resisting polypropylene fibre of 0.8kg in bubble body;
(3) the bubble body obtained in step (2) is utilized mould molding, the maintenance 28d demoulding again under 20 DEG C of moisturizing constant temperature, obtained sheet material after cutting, adopt in the micropore that vinyl acetate emulsion (acrylate and vinyl acetate emulsion) uniformly penetrating is entered sheet material by high pressure permeability equipment, 1m3It is 5kg that bubble body prepares the consumption of vinyl acetate emulsion (acrylate and vinyl acetate emulsion) on the sheet material, artificial drying or naturally air-dry, polymkeric substance conjunctiva on micro-pore wall of vinyl acetate emulsion (acrylate and vinyl acetate emulsion), the passage of blocking pore;
(4) examination and test of products qualified after, carry out packaging process get product.
The dry apparent density preparing the physical foaming cement warming plate according to above-mentioned material amounts and production technique is 176kg/m3, thermal conductivity is 0.054W/ (m K), and ultimate compression strength is 0.70MPa, and volume water-intake rate is 3.3%, and according to " cement based foam heat-insulating board ", (JC/T2200-2013 carries out the testing method of every index.
Embodiment 3
A kind of physical foaming cement warming plate production technique, step is:
(1) by general purpose portland cement 63kg, compound aluminosilicate mineral adulterant 66kg(wherein metakaolin 39.6kg, flyash 26.4kg), compound additive 3.3kg (wherein gypsum 1.98kg, calcium hydroxide 1.32kg), namely ordinary Portland cement percentage composition is 47.5%, compound aluminosilicate mineral adulterant percentage composition is that wherein metakaolin accounts for the mass percent of compound aluminosilicate mineral adulterant to 50%(is 60%), compound additive percentage composition is that 2.5% (wherein gypsum accounts for the mass percent of compound additive is 60%) is measured, stir to obtain solid materials in advance, obtain do not secrete water according to the mass ratio 0.8: 1 of water and the solid materials wet-milling 40min that adds water, not stratified slurry body,
(2) after adding neutral alkaline-resisting polypropylene fibre in slurry body high-speed stirring to fiber dispersion evenly after, add the formation of foam bubble body prepared diameter be less than 0.3 millimeter by the whipping agent being placed in foaming machine, 1m3Containing 0.7kg vegetable-protein whipping agent, the neutral alkaline-resisting polypropylene fibre of 1.0kg in bubble body;
(3) the bubble body obtained in step (2) is utilized mould molding, the maintenance 15d demoulding again under 40 DEG C of moisturizing constant temperature, obtained sheet material after cutting, high pressure permeability equipment is adopted to enter in the micropore of sheet material by benzene emulsion (cinnamic acrylic ester emulsion) uniformly penetrating, 1m3It is 5kg that bubble body prepares the consumption of benzene emulsion on the sheet material (cinnamic acrylic ester emulsion), artificial drying or naturally air-dry, polymkeric substance conjunctiva on micro-pore wall of benzene emulsion (cinnamic acrylic ester emulsion), the passage of blocking pore;
(4) examination and test of products qualified after, carry out packaging process get product.
The dry apparent density preparing the physical foaming cement warming plate according to above-mentioned material amounts and production technique is 165kg/m3, thermal conductivity is 0.048W/ (m K), and ultimate compression strength is 0.65MPa, and volume water-intake rate is 4.0%, and according to " cement based foam heat-insulating board ", (JC/T2200-2013 carries out the testing method of every index.
Embodiment 4
A kind of physical foaming cement warming plate production technique, step is:
(1) by general purpose portland cement 24kg, compound aluminosilicate mineral adulterant 90kg(wherein metakaolin 63kg, flyash 27kg), compound additive 6kg (wherein gypsum 2.4kg, calcium hydroxide 3.6kg), namely ordinary Portland cement percentage composition is 20%, compound aluminosilicate mineral adulterant percentage composition is that wherein metakaolin accounts for the mass percent of compound aluminosilicate mineral adulterant to 75%(is 70%), compound additive percentage composition is that 5% (wherein gypsum accounts for the mass percent of compound additive is 40%) is measured, stir to obtain solid materials in advance, obtain do not secrete water according to the mass ratio 1.0: 1 of water and the solid materials wet-milling 60min that adds water, not stratified slurry body,
(2) after adding neutral alkaline-resisting polypropylene fibre in slurry body high-speed stirring to fiber dispersion evenly after, add the formation of foam bubble body prepared diameter be less than 0.3 millimeter by the whipping agent being placed in foaming machine, 1m3Containing 0.75kg vegetable-protein whipping agent, the neutral alkaline-resisting polypropylene fibre of 1.5kg in bubble body;
(3) the bubble body obtained in step (2) is utilized mould molding, the maintenance 5d demoulding again under 70 DEG C of moisturizing constant temperature, obtained sheet material after cutting, adopting high pressure permeability equipment by EVA(vinyl acetate-ethylene copolymer) emulsion uniformly penetrating enters in the micropore of sheet material, 1m3Bubble body prepares EVA(vinyl acetate-ethylene copolymer on the sheet material) consumption of emulsion is 5kg, artificial drying or naturally air-dry, EVA(vinyl acetate-ethylene copolymer) polymkeric substance conjunctiva on micro-pore wall in emulsion, block the passage of pore;
(4) examination and test of products qualified after, carry out packaging process get product.
The dry apparent density preparing the physical foaming cement warming plate according to above-mentioned material amounts and production technique is 150kg/m3, thermal conductivity is 0.045W/ (m K), and ultimate compression strength is 0.62MPa, and volume water-intake rate is 4.5%, and according to " cement based foam heat-insulating board ", (JC/T2200-2013 carries out the testing method of every index.
Comparative example 1
In comparative example 1, the consumption of each raw material is identical with embodiment 1, and the difference of its preparation technology and embodiment 1 is: after being undertaken ordinary Portland cement measuring, stirring in advance, it does not have wet-milling pulping process, directly add fiber stirring.
It is 184kg/m that comparative example 1 prepares the dry apparent density of the physical foaming cement warming plate3, thermal conductivity is 0.062W/ (m k), and ultimate compression strength is 0.32MPa, and water-intake rate is 12%. Compared with embodiment 1: it is close that comparative example 1 prepares the physical foaming cement warming plate dry apparent density, but thermal conductivity increases (i.e. heat insulation effect be deteriorated), and ultimate compression strength reduces, and volume water-intake rate increases (thicker and go here and there hole and increase water-intake rate owing to steeping hole). This is owing to wet-milling slurrying can make material fully mix, and excitation material is active, it is to increase the activity index of material, the ultimate compression strength after favourable raising solidification; Meanwhile, through the slurry body of wet-milling, workability is good, does not secrete water, not stratified, can make bubble hole independent completion, so better heat preservation.
Comparative example 2
In comparative example 2, the consumption of each raw material is identical with embodiment 1, the difference of its preparation technology and embodiment 1 is: after the demoulding in step (3), cutting, obtained sheet material is directly packed, it does not have adopt high pressure permeability equipment that high molecular polymer water-proof emulsion uniformly penetrating enters the step in the micropore of sheet material.
The apparent density preparing the physical foaming cement warming plate is 183kg/m3, thermal conductivity is 0.061W/ (m k), and ultimate compression strength is 0.31MPa, and water-intake rate is 85%. Compared with embodiment 1: it is close that comparative example 2 prepares the physical foaming cement warming plate dry apparent density, but thermal conductivity increases (namely heat insulation effect is deteriorated), and ultimate compression strength reduces, and volume water-intake rate increases considerably. Illustrate in the micropore that rapid for high molecular polymer water-proof emulsion uniformly penetrating is entered sheet material by use high pressure permeability equipment, through artificial drying or naturally air-dry after, polymkeric substance in emulsion will on micro-pore wall conjunctiva, the passage of blocking pore, can effectively reduce the water-intake rate of warming plate, improve toughness and the intensity of sheet material, prevent sheet material from bursting.
Claims (10)
1. a physical foaming cement warming plate production technique, it is characterised in that, step is:
(1) by general purpose portland cement, compound aluminosilicate mineral adulterant, compound additive metering, stirring to obtain solid materials in advance, the wet-milling that adds water is obtained does not secrete water, not stratified slurry body;
(2) dispersed with stirring after adding fiber in slurry body; Then the formation of foam bubble body that diameter is less than 0.3 millimeter is added;
(3) cut into sheet material after the bubble body obtained in step (2) being utilized mould molding, maintenance, the demoulding, high molecular polymer water-proof emulsion uniformly penetrating is entered in the micropore of sheet material, artificial drying or naturally air-dry and get final product.
2. physical foaming cement warming plate production technique according to claim 1, it is characterised in that, in step (1), the mass ratio of water and solid materials is (0.6 ~ 1.0): 1, and the time of wet-milling slurrying is 20 ~ 60min.
3. physical foaming cement warming plate production technique according to claim 1, it is characterised in that, in step (3), bubble body utilizes maintenance 8h ~ 28d demoulding again under 20 ~ 100 DEG C of moisturizing constant temperature after die molding process.
4. physical foaming cement warming plate production technique according to claim 1, it is characterized in that, high molecular polymer water-proof emulsion described in step (3) is the one in water-repellancy pure-acrylic emulsion, vinyl acetate emulsion, benzene emulsion and vinyl acetate-ethylene copolymer emulsion, 1m3It is 5kg that bubble body prepares the consumption of high molecular polymer water-proof emulsion in the sheet material.
5. physical foaming cement warming plate production technique according to claim 1, it is characterized in that, described in step (1), compound aluminosilicate mineral adulterant is composited by metakaolin and flyash, and it is 50% ~ 70% that metakaolin accounts for the mass percent of compound aluminosilicate mineral adulterant.
6. physical foaming cement warming plate production technique according to claim 1, it is characterised in that, compound additive described in step (1) is composited by gypsum and calcium hydroxide, and it is 40% ~ 60% that gypsum accounts for the mass percent of compound additive.
7. physical foaming cement warming plate production technique according to claim 1, it is characterised in that, foam described in step (2) is prepared from foaming machine by whipping agent, and described whipping agent is vegetable-protein foaming agent.
8. physical foaming cement warming plate production technique according to claim 7, it is characterised in that, fiber described in step (2) is neutral alkaline-resisting polypropylene fibre.
9. physical foaming cement warming plate production technique according to claim 1, it is characterized in that, in solid materials described in step (1), the weight percent of each material is: general purpose portland cement 20 ~ 100%, compound aluminosilicate mineral adulterant 0 ~ 75%, surplus is compound additive.
10. physical foaming cement warming plate production technique according to claim 8, it is characterised in that, 1m in step (2)3Containing 0.5 ~ 0.75kg whipping agent, 0.8 ~ 1.5kg fiber in bubble body.
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| CN110304848A (en) * | 2019-04-11 | 2019-10-08 | 武汉理工大学 | A kind of super cementitious material and its preparation method and application based on wet-grinding technology and relative device |
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