CN103755289B - Heat insulating porous lagging material of ultralight cement based and preparation method thereof - Google Patents

Heat insulating porous lagging material of ultralight cement based and preparation method thereof Download PDF

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CN103755289B
CN103755289B CN201310538799.5A CN201310538799A CN103755289B CN 103755289 B CN103755289 B CN 103755289B CN 201310538799 A CN201310538799 A CN 201310538799A CN 103755289 B CN103755289 B CN 103755289B
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cement
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dispersion liquid
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CN103755289A (en
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桑国臣
朱轶韵
杨岗
赵钦
张浩博
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Xian University of Technology
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Abstract

Heat insulating porous lagging material of ultralight cement based and preparation method thereof, be made up of the component of following weight percent: 42.5 grades of quick hardening sulphoaluminate cement 40%-46%, ethylene-vinyl acetate copolymerization redispersable latex powder 7%-12%, powder high-efficiency water-reducing agent of poly-carboxylic acid 0.06%-0.14%, nano oxidized silica flour 0.12%-0.18%, polyoxyethylenated alcohol sodium sulfate whipping agent 3.6%-4.9%, all the other are water.Various component is mixed, makes foam slurry, obtained foam slurry is poured in mould and get final product.The heat insulating porous lagging material of the ultralight cement based of the present invention is a kind of pure inorganic high-performance heat preserving and insulating material, and thermal and insulating performance is good, and thermal conductivity is only 0.045-0.060W/mK, and dry apparent density is 120kg/m 3-180kg/m 3, there is A level not combustioncharacteristics and good toughness and impact resistance.

Description

Heat insulating porous lagging material of ultralight cement based and preparation method thereof
Technical field
The invention belongs to lagging material technical field, relate to the heat insulating porous lagging material of a kind of ultralight cement based, also relate to the preparation method of this material.
Background technology
The world today builds the three large key elements that must embody: safety, energy-saving and environmental protection.The roofing of buildings and Energy Consumption of Walls account for about 25% of total energy consumption, and architectural exterior-protecting construction is the emphasis of building energy conservation, and the Study on energy saving of walls and roofs is the key point realizing building energy conservation.The exterior wall of domestic energy saving building and roofing are mainly met design requirement by additional thermal insulation on structural sheet.The lagging material adopted generally adopts styrofoam and extruded polystyrene board based on organic polymer foam material, particularly exterior wall.The advantage that quality is light though this type of material has, thermal conductivity is low, but there is inflammable, the easy shortcoming such as aging, non-degradable in it, and the painful case occurred in recent years shows, adopts inflammable lagging material will inevitably bring huge potential safety hazard to people's lives and properties.The advantages such as inorganic heat preserving and heat insulation material does not fire because it has, durable, pollution-free, received unprecedented attention in the industry in recent years, wherein cement based porous thermal insulating lagging material, the performance advantages such as cost is low owing to having, production technique simple, good endurance, have become the important component part in inorganic heat preserving and heat insulation material.But existing cement based porous insulation material in construction market at present, remain in certain technical deficiency, as complicated process of preparation, quality control difficulty is large, thermal conductivity is relatively high, material fragility feature is obvious, constrains applying of such material to a certain extent.
Document 1(application number is 201110174789.9, publication number is CN102336554A, publication date is 2012.02.01) disclose a kind of cement-based lightweight porous heat insulating material and preparation method thereof.This material is by silicate cement or ordinary Portland cement, water reducer, suds-stabilizing agent, hardening accelerator, fiber, latex powder, hydrophober, whipping agent and water, coordinates according to a certain percentage, then leaves standstill foaming, natural curing, obtained lagging material through stirring injection molding.The dry apparent density of this material is at 250-300kg/m 3between, thermal conductivity is between 0.05-0.08W/mK, and the cement based porous material that its performance is more traditional is greatly improved.But this invention is because adopting hydrogen peroxide as whipping agent, and thus the state of getting angry is the important factor determining its quality.The preparation process of this series products, requires that the bodying velocity of raising rate and slurry adapts, but due to the speed of getting angry be change, the denseness of slurry is also change, and therefore to control difficulty larger for uniform in quality.
Document 2(application number is 201310229895.1, and publication number is CN103288393A, publication date is 2013.09.11) disclose a kind of low heat conductivity can the preparation method of cement foaming insulation board.The method is mixed in proportion cement, flyash, SILICA FUME, granular polystyrene, calcium stearate, poly-third ethene staple fibre, tri-chlorination molten iron, polymer dispersion powder, organosilicon moisture repellent, hydrogen peroxide, join in the hot water of 45 DEG C-55 DEG C, stir 5-10 minute, add polymer dispersion powder again and stir 1-2 minute, then whipping agent rapid stirring 5-10 second is again added, rapid injection mould foams, and the shaping rear demoulding, cutting, packs.The density of lagging material prepared by the method is 180-200kg/m 3, thermal conductivity is 0.050-0.054W/mK, and the thermal property of product is with the obvious advantage, is applicable in the energy saving building of our severe cold and cold district, and can meets the requirement of building energy conservation.But containing a certain amount of inflammable granular polystyrene in this product slate, this flame retardant property for material is disadvantageous, and chemical foaming technology makes it also there is the Harmonic Control of raising rate and slurry bodying velocity, and the quality control difficulty of product is larger.
Document 3(application number is 201110400261.9, publication number CN103145385A, and publication date is 2013.06.12) disclose a kind of cement physical blowing warming plate and preparation technology thereof.This material is prepared from special process by a certain percentage by 42.5 grades of silicate cements, dispersion agent, wetting agent, ethylene glycol, AMP-95, whipping agent, sanitas, water reducer, hardening accelerator, suds-stabilizing agent, hydrophober, rubber powder, fiber and other material.What adopt due to this invention is physical blowing method, so material foams rate of closed hole is up to 99%, this thermal property for material is very favorable.But this invention, plant because the starting material material kind related to reaches more than ten, its quality control difficulty is larger.In addition, owing to have employed the formation material of silicate cement as material hole framework, so there is the problems such as hardened material is slow, demould time long, curing time is long, production floor space is large.
Summary of the invention
The object of this invention is to provide the heat insulating porous lagging material of a kind of ultralight cement based, solve the problem that existing cement based porous insulation material thermal conductivity is larger.
Second object of the present invention is to provide the preparation method of above-mentioned lagging material.
Technical scheme of the present invention is, the heat insulating porous lagging material of ultralight cement based, be made up of the component of following weight percent: 42.5 grades of quick hardening sulphoaluminate cement 40%-46%, ethylene-vinyl acetate copolymerization redispersable latex powder 7%-12%, powder high-efficiency water-reducing agent of poly-carboxylic acid 0.06%-0.14%, nano oxidized silica flour 0.12%-0.18%, polyoxyethylenated alcohol sodium sulfate whipping agent 3.6%-4.9%, all the other are water.
Second technical scheme of the present invention is, the preparation method of the heat insulating porous lagging material of ultralight cement based, be made up of the component of following weight percent: 42.5 grades of quick hardening sulphoaluminate cement 40%-46%, ethylene-vinyl acetate copolymerization redispersable latex powder 7%-12%, powder high-efficiency water-reducing agent of poly-carboxylic acid 0.06%-0.14%, nano oxidized silica flour 0.12%-0.18%, polyoxyethylenated alcohol sodium sulfate whipping agent 3.6%-4.9%, all the other are water; First various component is mixed, make foam slurry, then obtained foam slurry poured in mould and get final product.
Preferred technical scheme is:
The first step, by 42.5 grades of quick hardening sulphoaluminate cements and the mixing of ethylene-vinyl acetate copolymerization redispersable latex powder, makes cement-rubber powder dry blend;
Second step, is mixed and made into dispersion liquid by water and high-efficiency water-reducing agent of poly-carboxylic acid; Again nano oxidized silica flour is mixed with dispersion liquid, obtain nano silicon oxide dispersion liquid; Then polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid;
3rd step, the nano silicon oxide dispersion liquid containing whipping agent that the cement the first step obtained-rubber powder dry blend and second step obtain mixes, and makes foam slurry;
4th step, pours in mould by obtained foam slurry, the obtained heat insulating porous lagging material of ultralight cement based.
In the first step, 42.5 grades of quick hardening sulphoaluminate cements, ethylene-vinyl acetate copolymerization redispersable latex powder are poured in cement mortar mixer successively, stirs 3 minutes with the rotating speed of 140 ± 5r/min.
In second step, first water is poured in agitator kettle, start water machine glue sand agitator power supply, stir with the rotating speed of 140 ± 5r/min, meanwhile equably high-efficiency water-reducing agent of poly-carboxylic acid is poured in agitator kettle, and then make dispersion liquid with the rotating speed of 285 ± 10r/min continuation stirring 5min; Then dispersion liquid is poured in high shear mixing stirrer, more nano oxidized silica flour is evenly poured in dispersion liquid, stir 20min with the speed of 1000-1100r/min, obtain nano silicon oxide dispersion liquid; Again polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid.
In 3rd step, cement-rubber powder dry blend is poured in agitator kettle, then the dispersion liquid containing whipping agent is poured into, stir 1min with the rotating speed of 140 ± 5r/min, then stir 5min with the rotating speed of 285 ± 10r/min, slurry is fully foamed.
In 4th step, the foam slurry be stirred is poured in mould, natural oxidation form removal after 12 hours, and then normal curing 60h, the obtained heat insulating porous lagging material of ultralight cement based.
The present invention has following beneficial effect:
1, the heat insulating porous lagging material of the ultralight cement based of the present invention with the cement slurry of nano silicon oxide and compound additive modification for material matrix, be prepared from through operations such as physical blowing, standing sclerosis, maintenance, oven dry, it is a kind of pure inorganic high-performance heat preserving and insulating material, its thermal and insulating performance is good, thermal conductivity is less, be only 0.045-0.060W/mK, dry apparent density is 120kg/m 3-180kg/m 3, there is A level not combustioncharacteristics.
2, the heat insulating porous lagging material of the ultralight cement based of the present invention can be applicable to the position such as exterior wall and roofing of energy saving building, can meet power conservation requirement and security against fire requirement, also can be applicable to the various engineering such as freezer, pipeline simultaneously.
3, the ultralight cement based of the present invention heat insulating porous lagging material preparation method technique is simple, quality control easy, and internal capillary aperture is mainly at 200-300um, and pore morphology is good, and based on closed pores, has good toughness and impact resistance.
Accompanying drawing explanation
Fig. 1 is the SEM figure of the heat insulating porous material internal capillary of the ultralight cement based of the present invention;
Fig. 2 is the heat insulating porous material of the ultralight cement based of the present invention anti-500g steel ball impact experiment schematic diagram;
Fig. 3 is the heat insulating porous material of the ultralight cement based of the present invention anti-500g steel ball impact experiment actual effect figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The heat insulating porous lagging material of ultralight cement based, be made up of the component of following weight percent: 42.5 grades of quick hardening sulphoaluminate cement 40%-46%, ethylene-vinyl acetate copolymerization redispersable latex powder 7%-12%, high-efficiency water-reducing agent of poly-carboxylic acid 0.06%-0.14%, nano oxidized silica flour 0.12%-0.18%, polyoxyethylenated alcohol sodium sulfate whipping agent 3.6%-4.9%, all the other are water.
The preparation method of the heat insulating porous lagging material of above-mentioned ultralight cement based, for various component to be mixed, makes foam slurry, pours in mould by obtained foam slurry, the obtained heat insulating porous lagging material of ultralight cement based.
Preferred preparation method operates according to the following steps:
The first step, by 42.5 grades of quick hardening sulphoaluminate cements and the mixing of ethylene-vinyl acetate copolymerization redispersable latex powder, makes cement-rubber powder dry blend;
Second step, is mixed and made into dispersion liquid by water and high-efficiency water-reducing agent of poly-carboxylic acid; Again nano oxidized silica flour is mixed with dispersion liquid, obtain nano silicon oxide dispersion liquid; Then polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid.
3rd step, the nano silicon oxide dispersion liquid containing whipping agent that the cement the first step obtained-rubber powder dry blend and second step obtain mixes, and makes foam slurry.
4th step, pours in mould by obtained foam slurry, the obtained heat insulating porous lagging material of ultralight cement based.
In the first step, 42.5 grades of quick hardening sulphoaluminate cements, ethylene-vinyl acetate copolymerization redispersable latex powder are poured in cement mortar mixer successively, stirs 3 minutes with the rotating speed of 140 ± 5r/min.
In second step, first water is poured in agitator kettle, start water machine glue sand agitator power supply, stir with the rotating speed of 140 ± 5r/min, meanwhile equably high-efficiency water-reducing agent of poly-carboxylic acid is poured in agitator kettle, and then make dispersion liquid with the rotating speed of 285 ± 10r/min continuation stirring 5min; Then dispersion liquid is poured in high shear mixing stirrer, more nano oxidized silica flour is evenly poured in dispersion liquid, stir 20min with the speed of 1000-1100r/min, obtain nano silicon oxide dispersion liquid; Again polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid.
In 3rd step, cement-rubber powder dry blend is poured in agitator kettle, then the dispersion liquid containing whipping agent is poured into, stir 1min with the rotating speed of 140 ± 5r/min, then stir 5min with the rotating speed of 285 ± 10r/min, slurry is fully foamed.
In 4th step, the foam slurry be stirred is poured in mould, natural oxidation form removal after 12 hours, and then normal curing 60h, the obtained heat insulating porous lagging material of ultralight cement based.
Aluminosulfate cement has setting and harden time short, the performance advantage such as early strength is high, therefore adopt aluminosulfate cement as the body material of lagging material, contribute to cement slurry and the solidification of quick form is realized to introduced foam, and be conducive to improving the early mechanics characteristics of lagging material, improving the specific tenacity of material.The high-efficiency water-reducing agent of poly-carboxylic acid that the present invention adopts, cement slurry can be made to reduce mixing water content, the parent of cement slurry to foam can be improved again and moisten degree, simultaneously as the dispersion agent of nano silicon oxide, obviously can improve nano silicon oxide dispersion effect in a liquid.Nano silicon oxide is a kind of highly active modified cement material, can improve the gel-like substance content in cement-based material.Use nano oxidized silica flour in the present invention, be conducive to the minute fissure reducing lagging material internal capillary hole wall, thus the degree of closure of pore wall strength and micropore is made moderate progress.Inorganic materials belongs to hard brittle material, but its Brittleness is very disadvantageous for light heat insulation material.Because lagging material is applied to the outside surface of building or pipeline, the probability being therefore subject to the destructions such as external impacts is comparatively large, and the low intensive material of lightweight, under impact fracture, is easy to cause overall destruction.The present invention utilizes the aquation film forming characteristics of redispersable latex powder, improves the toughness of heat preserving and insulating material, thus improves the shock resistance destructiveness of material.
The present invention utilizes physical blowing method to produce micro-bubble, under the effect of multiple properties-correcting agent, mix with cement slurry, and along with the process of cement slurry retrogradation gradually, sclerosis, fast micro-bubble form is solidified, thus obtain the heat insulating porous lagging material of light cement base of mechanical property and thermal property excellence.
Adopt the heat insulating porous lagging material of ultralight cement based prepared by preparation method of the present invention, dry apparent density is 120kg/m 3-180kg/m 3, thermal conductivity is 0.045-0.060W/mK, and volume water absorption rate 6%-10%, 3d baked strength is 0.18-0.32MPa.Internal capillary aperture is mainly at 200-300um, and pore morphology is good, and based on closed pores, sees Fig. 2.This lagging material has good toughness, and impact resistance is remarkable.500g steel ball 100cm height free-falling impact experiment result shows, under impact damage, can absorb energy of rupture, and there will not be the phenomenons such as breakage, cracking, shedding by matrix deformation.Test situation is see Fig. 3.
Embodiment 1, the heat insulating porous lagging material of ultralight cement based, the mass percent of each component is: 42.5 grades of quick hardening sulphoaluminate cements 46%, ethylene-vinyl acetate copolymerization redispersable latex powder 8.8%, high-efficiency water-reducing agent of poly-carboxylic acid (model: 2651F) 0.12%, nano oxidized silica flour 0.18%, polyoxyethylenated alcohol sodium sulfate whipping agent 4.9%, water 40%.
Its preparation method:
The first step: by component ratio, both are poured in cement mortar mixer by precise 42.5 grades of aluminosulfate cements, ethylene-vinyl acetate copolymerization redispersable latex powder successively, 3 minutes are stirred with the rotating speed of 140 ± 5r/min, mix, obtained cement-rubber powder dry blend, stand-by.
Second step:
(1) mixing water and high-efficiency water-reducing agent of poly-carboxylic acid is measured by component ratio, then mixing water is poured in agitator kettle, start water machine glue sand agitator power supply, stir with the rotating speed of 140 ± 5r/min, meanwhile equably dispersion agent is poured in agitator kettle, and then continue to stir 5min, powered-down with the rotating speed of 285 ± 10r/min, the dispersion liquid fully dissolved by dispersion agent is poured out, stand-by.
(2) nano oxidized silica flour to be disperseed is measured with the electronic balance that precision is 0.01g.Dispersion liquid obtained in (2) is poured in high shear mixing stirrer, more load weighted nano oxidized silica flour is evenly poured in dispersion liquid, then start stirrer, stir 20min with the speed of 1000-1100r/min, obtain nano silicon oxide dispersion liquid, stand-by.
(3) measure polyoxyethylenated alcohol sodium sulfate whipping agent with the electronic balance that precision is 0.01g, pour in nano silicon oxide dispersion liquid, the obtained nano silicon oxide dispersion liquid containing whipping agent
3rd step, cement in the first step-rubber powder dry blend is poured in agitator kettle, again the nano silicon oxide dispersion liquid containing whipping agent is poured into, start power supply, 1min is stirred with the rotating speed of 140 ± 5r/min, again with the rotating speed high-speed stirring 5min of 285 ± 10r/min, obtained foam slurry, makes slurry fully foam.
4th step, pours in mould by the foam slurry be stirred, natural oxidation form removal after 12 hours, and then normal curing 60h, the obtained heat insulating porous lagging material of ultralight cement based.
The relevant performance of the heat insulating porous lagging material of ultralight cement based of preparation is in table 1.
Embodiment 2: the heat insulating porous lagging material of ultralight cement based, the mass percent of each component is: 42.5 grades of quick hardening sulphoaluminate cements 43%, ethylene-vinyl acetate copolymerization redispersable latex powder 9.5%, high-efficiency water-reducing agent of poly-carboxylic acid (model: 2651F) 0.10%, nano oxidized silica flour 0.15%, polyoxyethylenated alcohol sodium sulfate whipping agent 4.25%, water 43%.
Preparation method is see embodiment 1.The relevant performance of the heat insulating porous lagging material of ultralight cement based of preparation is in table 1.
Embodiment 3: the heat insulating porous lagging material of ultralight cement based, the mass percent of each component is: 42.5 grades of quick hardening sulphoaluminate cements 40%, ethylene-vinyl acetate copolymerization redispersable latex powder 12%, high-efficiency water-reducing agent of poly-carboxylic acid (model: 2651F) 0.06%, nano oxidized silica flour 0.12%, polyoxyethylenated alcohol sodium sulfate whipping agent 4.82%, water 43%.
Preparation method is see embodiment 1.The relevant performance of the heat insulating porous lagging material of ultralight cement based of preparation is in table 1.
Embodiment 4: the heat insulating porous lagging material of ultralight cement based, the mass percent of each component is: 42.5 grades of quick hardening sulphoaluminate cements 43.1%, ethylene-vinyl acetate copolymerization redispersable latex powder 7.0%, high-efficiency water-reducing agent of poly-carboxylic acid (model: 2651F) 0.14%, nano oxidized silica flour 0.16%, polyoxyethylenated alcohol sodium sulfate whipping agent 3.6%, water 46%.
Preparation method is see embodiment 1.The relevant performance of the heat insulating porous lagging material of ultralight cement based of preparation is in table 1.
The relevant performance of the heat insulating porous lagging material of ultralight cement based prepared by table 1 embodiment 1-4

Claims (6)

1. the heat insulating porous lagging material of ultralight cement based, it is characterized in that: be made up of the component of following weight percent: 42.5 grades of quick hardening sulphoaluminate cement 40%-46%, ethylene-vinyl acetate copolymerization redispersable latex powder 7%-12%, powder high-efficiency water-reducing agent of poly-carboxylic acid 0.06%-0.14%, nano oxidized silica flour 0.12%-0.18%, polyoxyethylenated alcohol sodium sulfate whipping agent 3.6%-4.9%, all the other are water; Various component is mixed, makes foam slurry, obtained foam slurry is poured in mould, the obtained heat insulating porous lagging material of ultralight cement based.
2. the heat insulating porous lagging material of ultralight cement based as claimed in claim 1, is characterized in that: its preparation method specifically comprises the following steps:
The first step, by 42.5 grades of aluminosulfate cements and the mixing of ethylene-vinyl acetate copolymerization redispersable latex powder, make cement-rubber powder dry blend, be specially: 42.5 grades of quick hardening sulphoaluminate cements, ethylene-vinyl acetate copolymerization redispersable latex powder are poured in cement mortar mixer successively, stirs 3 minutes with the rotating speed of 140 ± 5r/min;
Second step, is mixed and made into dispersion liquid by water and high-efficiency water-reducing agent of poly-carboxylic acid; Again nano oxidized silica flour is mixed with dispersion liquid, obtain nano silicon oxide dispersion liquid; Then polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid, is specially:
First water is poured in agitator kettle, start water machine glue sand agitator power supply, stir with the rotating speed of 140 ± 5r/min, meanwhile equably high-efficiency water-reducing agent of poly-carboxylic acid is poured in agitator kettle, and then make dispersion liquid with the rotating speed of 285 ± 10r/min continuation stirring 5min; Then dispersion liquid is poured in high shear mixing stirrer, more nano oxidized silica flour is evenly poured in dispersion liquid, stir 20min with the speed of 1000-1100r/min, obtain nano silicon oxide dispersion liquid; Again polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid;
3rd step, the nano silicon oxide dispersion liquid containing whipping agent that the cement the first step obtained-rubber powder dry blend and second step obtain mixes, and makes foam slurry;
4th step, pours in mould by obtained foam slurry, the obtained heat insulating porous lagging material of ultralight cement based.
3. the heat insulating porous lagging material of ultralight cement based as claimed in claim 2, is characterized in that:
In 3rd step, cement-rubber powder dry blend is poured in agitator kettle, then the dispersion liquid containing whipping agent is poured into, stir 1min with the rotating speed of 140 ± 5r/min, then stir 5min with the rotating speed of 285 ± 10r/min, slurry is fully foamed;
In 4th step, the foam slurry be stirred is poured in mould, natural curing form removal after 12 hours, and then normal curing 60h, the obtained heat insulating porous lagging material of ultralight cement based.
4. the preparation method of the heat insulating porous lagging material of ultralight cement based, it is characterized in that, be made up of the component of following weight percent: 42.5 grades of quick hardening sulphoaluminate cement 40%-46%, ethylene-vinyl acetate copolymerization redispersable latex powder 7%-12%, powder high-efficiency water-reducing agent of poly-carboxylic acid 0.06%-0.14%, nano oxidized silica flour 0.12%-0.18%, polyoxyethylenated alcohol sodium sulfate whipping agent 3.6%-4.9%, all the other are water; Various component is mixed, makes foam slurry, obtained foam slurry is poured in mould, the obtained heat insulating porous lagging material of ultralight cement based.
5. the preparation method of the heat insulating porous lagging material of ultralight cement based as claimed in claim 4, is characterized in that, specifically comprise the following steps:
The first step, by 42.5 grades of quick hardening sulphoaluminate cements and the mixing of ethylene-vinyl acetate copolymerization redispersable latex powder, make cement-rubber powder dry blend, be specially: 42.5 grades of quick hardening sulphoaluminate cements, ethylene-vinyl acetate copolymerization redispersable latex powder are poured in cement mortar mixer successively, stirs 3 minutes with the rotating speed of 140 ± 5r/min;
Second step, is mixed and made into dispersion liquid by water and high-efficiency water-reducing agent of poly-carboxylic acid; Again nano oxidized silica flour is mixed with dispersion liquid, obtain nano silicon oxide dispersion liquid; Then polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid, is specially:
First water is poured in agitator kettle, start water machine glue sand agitator power supply, stir with the rotating speed of 140 ± 5r/min, meanwhile equably high-efficiency water-reducing agent of poly-carboxylic acid is poured in agitator kettle, and then make dispersion liquid with the rotating speed of 285 ± 10r/min continuation stirring 5min; Then dispersion liquid is poured in high shear mixing stirrer, more nano oxidized silica flour is evenly poured in dispersion liquid, stir 20min with the speed of 1000-1100r/min, obtain nano silicon oxide dispersion liquid; Again polyoxyethylenated alcohol sodium sulfate whipping agent is poured in nano silicon oxide dispersion liquid;
3rd step, the nano silicon oxide dispersion liquid containing whipping agent that the cement the first step obtained-rubber powder dry blend and second step obtain mixes, and makes foam slurry;
4th step, pours in mould by obtained foam slurry, the obtained heat insulating porous lagging material of ultralight cement based.
6. the preparation method of the heat insulating porous lagging material of ultralight cement based as claimed in claim 5, is characterized in that:
In 3rd step, cement-rubber powder dry blend is poured in agitator kettle, then the dispersion liquid containing whipping agent is poured into, stir 1min with the rotating speed of 140 ± 5r/min, then stir 5min with the rotating speed of 285 ± 10r/min, slurry is fully foamed;
In 4th step, the foam slurry be stirred is poured in mould, natural curing form removal after 12 hours, and then normal curing 60h, the obtained heat insulating porous lagging material of ultralight cement based.
CN201310538799.5A 2013-11-01 2013-11-01 Heat insulating porous lagging material of ultralight cement based and preparation method thereof Active CN103755289B (en)

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