CN102659354B - A-grade non-ignitable heat insulating material and preparation method thereof - Google Patents
A-grade non-ignitable heat insulating material and preparation method thereof Download PDFInfo
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- CN102659354B CN102659354B CN2012101275110A CN201210127511A CN102659354B CN 102659354 B CN102659354 B CN 102659354B CN 2012101275110 A CN2012101275110 A CN 2012101275110A CN 201210127511 A CN201210127511 A CN 201210127511A CN 102659354 B CN102659354 B CN 102659354B
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Abstract
The invention relates to an A-grade non-ignitable heat insulating material and a preparation method thereof. The raw materials of the heat insulating material include, by mass, 45% to 60% of cement, 24% to 36% of modified vitrified microbead, 13% to 26% of mineral micro powder, 1% to 4% of exciting agent, 0.02% to 0.90% of early strength agent, 1% to 3% of redispersible latex powder and 0.10% to 0.30% of foaming agent. The preparation method of the heat insulating material includes the steps of preprocessing of the cement, modification of the vitrified microbead, preparation of the existing agent and the preparation of the heat insulating material. The A-grade non-ignitable heat insulating material and the preparation method thereof have the advantages of improving heat insulating performance of buildings, reducing energy consumption of the buildings and improving security of the buildings. Simultaneously, the provided heat material has the advantages of low dry density, low thermal conductivity and high strength.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of new A level and do not fire lagging material and preparation method thereof.
Background technology
Nearly 2,000,000,000 square metres of China's annual town and country newly constructed house floor area of building, nearly 42,000,000,000 square metres of existing building, building energy consumption has accounted for more than 27% of national total energy consumption, and Building Energy-saving has become the important step of China's Sustainable development, especially the energy-conservation status with particularly important of building enclosure.The most frequently used lagging materials such as extruded polystyrene board (XPS) or expansion polyphenyl plate (EPS), although having thermal conductivity hangs down and the advantages such as density is little, but as organic materials, its combustibility has caused very large potential safety hazard, in recent years, " Wan Xin hotel, ”,“ Shenyang, teacher apartment, ”,“ Shanghai, the CCTV building " fire that causes because of the thermal insulation layer burning has occurred in the ground such as Beijing, Shanghai, Shenyang, fully exposes the fire prevention defect of traditional organic insulation material.
Kervit microbead insulated sand slurry is a kind of inorganic heat insulation material take glass bead as aggregate, and because glass bead inside is cellular cavity structure, surface forms the vitreum shell, thereby has light weight, water-intake rate is low, intensity is high, physicochemical property is stable characteristics.Yet most of glass bead of our domestic production all exists unit weight and water-intake rate problems of too at present.It is generally higher that the south China area utilizes glass bead to make the thermal insulation mortar dry density of aggregate preparation, and its heat-insulating property is greatly affected.Simultaneously, the vitrified microsphere insulating material of preparation, excessive because of the water-intake rate (60%～150%) of glass bead at present, causes its water-intake rate high, and the lagging material unit weight of preparation is mostly 300～500kg/m
3, thermal conductivity is 0.075～1.5/W/mK, and low strength, can not meet the requirement of China's building energy conservation 65%, particularly in the north of cold.Less for the research for preparing the high-strength light inorganic heat insulation material with glass bead.
About the research of inorganic heat insulation material, existing large quantity research is reported both at home and abroad, and lot of documents is arranged, for example:
Zeng Liang etc. take that aggregate is compound, grain composition, mix the means such as air entrapment agent outward the performance of kervit microbead insulated sand slurry is optimized to research, and have inquired into the impact of each constituent materials on the thermal insulation mortar performance.Experimental result shows, by optimizing proportioning, mixes again the expanded perlite thermal-nsulation aggregate, mixes the over-all properties that air entrapment agent and flyash can obviously improve kervit microbead insulated sand slurry.(referring to document: Zeng Liang, Huang Shaowen, Hu Xin, Luo Qi. the performance optimization of kervit microbead insulated sand slurry [J]. University Of Nanchang's journal, 2008,30 (4): 341-344.).
Fang Minghui has studied cement, properties-correcting agent, redispersable latex powder and different agglutinate and the situation that affects of comparing the thermal insulation mortar performance of heat preserving aggregate.(referring to document: Fang Minghui, Zhu Penglai, Huang Zhenzhen, Qian Xiaoqian. the inorganic light-weight aggregate thermal insulation mortar material forms the research [J] to performance impact. chemical building material, 2008,24 (6): 21-25.).
Wu Enming has set forth performance and characteristics, structural types and the crucial composition material thereof of EPS/XPS plate thinly plastered external insulation system of outer wall, glue powder polyphenyl granule exterior wall outer heat preservation system and polyurethane rigid foam exterior wall outer heat preservation system.(referring to document: Wu Enming, Chen Wensong. kervit microbead insulated sand slurry external thermal insulation system and critical material thereof [J]. New Building Materials, 2008, (9): 71-72.).
Yu Guiliang etc. describe traditional organic insulation material in detail and in building energy conservation, in application process, have the problems such as disaster hidden-trouble and weather resistance, point out the superiority of inorganic heat insulation material, and have set forth its application in building energy conservation.(referring to document: Yu Guiliang, Lu Dawei. the application of inorganic heat insulation material [J] in building energy conservation. Building technology, 2010, (16): 179-180.).
Zhou Xiaolong has studied the impact on performances such as thermal insulation mortar ultimate compression strength, tensile bond strength, shrinking percentages of glass bead, latex powder, calcium hydroxide, ether of cellulose and fiber, obtains that thermal conductivity is low, intensity is high, meets the kervit microbead insulated sand slurry of Xia Redong cryogenic region building energy conservation requirement.(referring to document: the preparation [J] of Zhou Xiaolong. Xia Redong cryogenic region kervit microbead insulated sand slurry. walling innovation and building energy conservation, 2010, (6): 56-59.).
Lagging material mainly is divided into two classes in the application in Europe: inorganic fibers and organic foam material.For the application class of lagging material commonly used in Europe.In these lagging materials, inorganic fibers accounts for 60% the market share, and organic foam material accounts for 27% the market share, and all other material is less than 13% the market share.(referring to document: Huang Haonan. inorganic heat insulation mortar preparation and performance study [D]. Hunan University's Master's thesis, 2008.).
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of new A level not fire the preparation method of lagging material; the method is utilized the starting material such as cement, modified vitrification micro-bead, mineral micro powder, exciting agent, hardening accelerator; prepare the lagging material that meets national building energy conservation requirement; for the energy consumption that reduces architectural exterior-protecting construction, the heat insulating and the fire resistance that improve buildings have great importance.
The present invention solves its technical problem by the following technical solutions: a kind of A level is not fired lagging material; it is characterized in that being formed through being mixed with by following component; each component and content thereof are: cement 45～60%, modified vitrification micro-bead 24～36%, mineral micro powder 13～26%; exciting agent 1～4%; hardening accelerator 0.02～0.90%, redispersable latex powder 1～3%, foaming agent 0.1～0.3%; anti-fissuring agent 0.20～0.50% and water-holding agent 0.20～0.50%, more than be mass percent.
Press such scheme, described anti-fissuring agent is that 3～5mm polypropylene fibre and 6～10mm ceramic fiber are (2～4) in mass ratio: 1 forms, and described water-holding agent is hydroxypropyl methyl cellulose ether, and its viscosity is 50000 ~ 200000mPas.
Press such scheme, described cement is (3～5) in mass ratio by ordinary Portland cement and aluminosulfate cement: 1 forms.
Press such scheme, the preparation method of described modified vitrification micro-bead is: glass bead is soaked to 3～5h in emulsified olefin solution, dry 2～4h gained under 20～35 ℃, its unit weight is 120～140kg/m
3, particle diameter is 0.5～2mm, the volume water absorption rate is 20～35%.
Press such scheme, described mineral micro powder is that metakaolin and SILICA FUME are (2～4) in mass ratio: 1 mixture, the preparation method of described metakaolin is: kaolin, through 800 ~ 900 ℃ of calcinings, is incubated to 2～4h, and grinding is to specific surface area 3000～4000cm
2/ g.
Press such scheme, described exciting agent is the mixture of water glass and sodium hydroxide, and wherein the modulus of mixture mesosilicic acid sodium is 0.8～1.2.
Press such scheme, described hardening accelerator is sodium sulfate, calcium chloride or trolamine.
Press such scheme, described foaming agent is aluminium powder, and its particle diameter is 15～25 μ m.
Described A level is not fired the preparation method of lagging material, it is characterized in that comprising the following steps:
1) pre-treatment of cement:
First ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, making its specific surface area is 2500～4000cm
2/ g, by the two mass ratio, be (3～5): 1 mixes, and obtains cement;
2) modification of glass bead:
Glass bead is soaked to 3～5h in emulsified olefin solution, dry 2～4h gained under 20～35 ℃, its unit weight is 120～140kg/m
3, particle diameter is 0.5～2mm, the volume water absorption rate is 20～35%;
3) preparation of mineral micro powder:
Kaolin, through 800 ~ 900 ℃ of calcinings, is incubated to 2～4h, and grinding is to specific surface area 3000～4000cm
2/ g, be in mass ratio (2～4): 1 mixes metakaolin with SILICA FUME, obtain mineral micro powder;
4) preparation of exciting agent:
Sodium hydroxide after grinding is mixed with water glass, adjust the volume of sodium hydroxide, making the modulus of water glass is 0.8～1.2, obtains exciting agent;
5) preparation of anti-fissuring agent:
By length, be that the polypropylene fibre of 3～5mm and the ceramic fiber of 6～10mm are (2～4) according to mass ratio: 1 mixes, and obtains anti-fissuring agent;
6) preparation of lagging material:
by mineral micro powder, redispersable latex powder, hardening accelerator, cement, exciting agent and anti-fissuring agent take by formula, then they are mixed, add water, stir soon 2～4min, by modified vitrification micro-bead, water-holding agent and foaming agent add in cement slurry, slowly stir 1～2min, injection molding, quietly stop paying out gas and maintenance, obtain described lagging material, each feed composition content is: cement 45～60%, modified vitrification micro-bead 24～36%, mineral micro powder 13～26%, exciting agent 1～4%, hardening accelerator 0.02～0.90%, redispersable latex powder 1～3%, foaming agent 0.1～0.3%, anti-fissuring agent 0.20～0.50% and water-holding agent 0.20～0.50%, more than be mass percent.
Each raw-material acting as in the present invention:
Metakaolin is the anhydrous aluminium silicate that forms kaolin dewaters under proper temperature after, has higher pozzolanic activity, can with hydrolysis product of cement Ca (OH)
2The gum materials such as water generation reaction calcium aluminate, C-S-H gel, have higher hydration activity.
Exciting agent can improve the OH in solution
-Concentration, impel that metakaolin is cancellated to be cracked, and accelerates its hydration reaction.
The Ca (OH) that SILICA FUME produces with cement hydration process on the one hand
2Reaction, form the water mudrock structure that is difficult for infiltration; On the other hand, SILICA FUME has higher specific surface area, can be filled between cement granules, makes water mudrock structure more closely knit.
Water-holding agent makes lagging material that certain water retention be arranged, and can guarantee that the gelling material such as cement carry out hydration reaction more fully.
The present invention compared with prior art has advantages of following main:
1. Portland cement being carried out to modification prepares the new A level and does not fire lagging material.On the one hand, can give full play to high strength, the high-durability of Portland cement, the work-ing life of raising goods; On the other hand, can greatly reduce production costs, make lagging material have more price advantage, be conducive to further applying of product.
2. take metakaolin as filler, and to it, carry out modification.In metakaolin, adding modulus is 0.8～1.2 water glass, can improve the mechanical property of lagging material, has solved the contradiction of low dry density and strong mechanical performance.
3. glass bead is carried out to modification, reduce its water-intake rate, improve the water tolerance of lagging material, prepare unit weight at 220～300kg/m
3Lagging material.
4. mix foaming agent, improve the porosity of lagging material.Foaming agent and the alkaline saturated solution generation hydrogen that reacts, and along with the rising of base substrate temperature, gas volume increases, form equally distributed pore lagging material is inner.
The accompanying drawing explanation
Fig. 1 is the micro-structure diagram of embodiment 1 products obtained therefrom;
Fig. 2 is the micro-structure diagram of embodiment 1 products obtained therefrom.
Embodiment
The invention will be further described below in conjunction with embodiment, but not only be confined to the following examples.
Embodiment 1:
1) pre-treatment of cement: first ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, making its specific surface area is 3500cm
2/ g is that 4:1 mixes by the two mass ratio;
2) modification of glass bead: glass bead is placed in 30% emulsified olefin and soaks 5h, oven dry 2h obtains described modified vitrification micro-bead in 30 ℃ of baking ovens, and unit weight is 125kg/m
3, particle diameter is 0.50～2mm, the volume water absorption rate is 30%;
3) preparation of mineral micro powder: kaolin, through 800 ℃ of calcinings, is incubated to 4h, and grinding is to specific surface area 3000cm
2/ g, the gained metakaolin is with SILICA FUME in mass ratio for 2:1 mixes, and grinding to specific surface area is 3500cm
2/ g.
4) preparation of exciting agent: the sodium hydroxide after grinding mixes with water glass, adjusts the volume of sodium hydroxide, and making the modulus of water glass is 1.1, obtains exciting agent;
5) preparation of anti-fissuring agent: will grow for the polypropylene fibre of 5mm and the ceramic fiber of 8mm are that 2:1 mixes according to mass ratio, and obtain anti-fissuring agent;
6) preparation of lagging material: be that 200000mPas hydroxypropyl methyl cellulose ether 0.30% and anti-fissuring agent 0.30% take by formula by cement 50%, mineral micro powder 17%, exciting agent 2.4%, redispersable latex powder 1.4%, sodium sulfate 0.40%, viscosity by above-mentioned material; then mix; add water; with mortar mixer, stir soon 3min; add 28% modified vitrification micro-bead and 0.20% aluminium powder foaming agent (particle diameter 15 μ m), stir slowly 2min, injection molding; normal curing, to 28d, obtains lagging material.
Fig. 1 and Fig. 2 are the micro-structure diagram of embodiment 1; as seen from the figure; the tennis shape be the vitrified micro-bead heat preserving aggregate; the foamed material that is filled in the glass bead interface is namely the hydrated product of inorganic binder; in figure, can see between aggregate and agglutinate hydrated product interface and filling closely; the hydrated product of inorganic binder has wrapped glass bead, and performance is in Table 1.
The performance that table 1 new A level is not fired lagging material
| Project | Lagging material | Project | Lagging material |
| Dry density/kg/m 3 | 286 | Cohesive strength/MPa | 0.92 |
| Thermal conductivity/W/mK | 0.068 | Coefficient of softening | 0.75 |
| Ultimate compression strength/MPa | 0.95 | Linear shrinkage ratio/% | 0.23 |
| Water-intake rate/% | 9 | Combustionproperty | A |
Embodiment 2:
1) pre-treatment of cement: first ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, making its specific surface area is 3000cm
2/ g is that 5:1 mixes by the two mass ratio;
2) modification of glass bead: glass bead is placed in 50% emulsified olefin and soaks 5h, oven dry 4h obtains described modified vitrification micro-bead in 35 ℃ of baking ovens; Unit weight is 130kg/m
3, particle diameter is 0.50～2mm, the volume water absorption rate is 29%;
3) preparation of mineral micro powder: kaolin, through 800 ℃ of calcinings, is incubated to 3h, and grinding is to specific surface area 3000cm
2/ g.
The gained metakaolin is with SILICA FUME in mass ratio for 3:1 mixes, and grinding to specific surface area is 3000cm
2/ g.
4) preparation of exciting agent: the sodium hydroxide after grinding mixes with water glass, adjusts the volume of sodium hydroxide, and making the modulus of water glass is 1.0, obtains exciting agent;
5) preparation of anti-fissuring agent: will grow for the polypropylene fibre of 4mm and the ceramic fiber of 9mm are that 3:1 mixes according to mass ratio, and obtain anti-fissuring agent;
6) preparation of lagging material: be that 100000mPas hydroxypropyl methyl cellulose ether 0.40% and anti-fissuring agent 0.40% take by formula by cement 45%, mineral micro powder 15%, exciting agent 2.20%, redispersable latex powder 1.85%, trolamine 0.05%, viscosity by above-mentioned material; then mix; add water; with mortar mixer, stir soon 4min; add 35% modified vitrification micro-bead and 0.10% aluminium powder foaming agent (particle diameter 15 μ m); slowly stir 1min; injection molding; normal curing is to 28d; obtain lagging material, performance is in Table 2.
The performance that table 2 new A level is not fired lagging material
| Project | Lagging material | Project | Lagging material |
| Dry density/kg/m 3 | 255 | Cohesive strength/MPa | 0.83 |
| Thermal conductivity/W/mK | 0.060 | Coefficient of softening | 0.70 |
| Ultimate compression strength/MPa | 0.82 | Linear shrinkage ratio/% | 0.26 |
| Water-intake rate/% | 12 | Combustionproperty | A |
Embodiment 3:
1) pre-treatment of cement: first ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, making its specific surface area is 4000cm
2/ g is that 4:1 mixes by the two mass ratio;
2) modification of glass bead: glass bead is placed in 45% emulsified olefin and soaks 4.5h, oven dry 3h obtains described modified vitrification micro-bead in 30 ℃ of baking ovens, and unit weight is 135kg/m
3, particle diameter is 0.5mm～1.5mm, the volume water absorption rate is 30%;
3) preparation of mineral micro powder: kaolin, through 800 ℃ of calcinings, is incubated to 4h, and grinding is to specific surface area 3500cm
2/ g.
The gained metakaolin is with SILICA FUME in mass ratio for 2.5:1 mixes, and grinding to specific surface area is 3500cm
2/ g.
4) preparation of exciting agent: the sodium hydroxide after grinding mixes with water glass, adjusts the volume of sodium hydroxide, and making the modulus of water glass is 1.2, obtains exciting agent;
5) preparation of anti-fissuring agent: will grow for the polypropylene fibre of 5mm and the ceramic fiber of 6mm are that 4:1 mixes according to mass ratio, and obtain anti-fissuring agent;
6) preparation of lagging material: be that 80000mPas hydroxypropyl methyl cellulose ether 0.25% and anti-fissuring agent 0.35% take by formula by cement 45%, mineral micro powder 18%, exciting agent 1.55%, redispersable latex powder 1.52%, calcium chloride 0.70%, viscosity by above-mentioned material; then mix; add water; with mortar mixer, stir soon 3min; add modified vitrification micro-bead 32.50% and 0.13% aluminium powder foaming agent (particle diameter 15 μ m); slowly stir 2min; injection molding; normal curing is to 28d; obtain lagging material, performance is in Table 3.
The performance that table 3 new A level is not fired lagging material
| Project | Lagging material | Project | Lagging material |
| Dry density/kg/m 3 | 248 | Cohesive strength/MPa | 0.81 |
| Thermal conductivity/W/mK | 0.058 | Coefficient of softening | 0.68 |
| Ultimate compression strength/MPa | 0.81 | Linear shrinkage ratio/% | 0.28 |
| Water-intake rate/% | 13 | Combustionproperty | A |
Embodiment 4:
1) pre-treatment of cement: first ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, making its specific surface area is 3500cm
2/ g is that 4:1 mixes by the two mass ratio;
2) modification of glass bead: glass bead is placed in 40% emulsified olefin and soaks 4h, oven dry 4h obtains described modified vitrification micro-bead in 25 ℃ of baking ovens, and unit weight is 130kg/m
3, particle diameter is 0.5mm～1.5mm, the volume water absorption rate is 28%;
3) preparation of mineral micro powder: kaolin, through 800 ℃ of calcinings, is incubated to 3h, and grinding is to specific surface area 3000cm
2/ g.
The gained metakaolin is with SILICA FUME in mass ratio for 3.5:1 mixes, and grinding to specific surface area is 3000cm
2/ g.
4) preparation of exciting agent: the sodium hydroxide after grinding mixes with water glass, adjusts the volume of sodium hydroxide, and making the modulus of water glass is 0.9, obtains exciting agent;
5) preparation of anti-fissuring agent: will grow for the polypropylene fibre of 3mm and the ceramic fiber of 10mm are that 3:1 mixes according to mass ratio, and obtain anti-fissuring agent;
6) preparation of lagging material: be that 120000mPas hydroxypropyl methyl cellulose ether 0.25% and anti-fissuring agent 0.30% take by formula by cement 48%, mineral micro powder 17.2%, exciting agent 2.60%, redispersable latex powder 2%, sodium sulfate 0.50%, viscosity by above-mentioned material; then mix; add water; with mortar mixer, stir soon 2min; add 29% modified vitrification micro-bead and 0.15% aluminium powder foaming agent (particle diameter 25 μ m); slowly stir 1min; injection molding; normal curing is to 28d; obtain described lagging material, performance is in Table 4.
The performance that table 4 new A level is not fired lagging material
| Project | Lagging material | Project | Lagging material |
| Dry density/kg/m 3 | 282 | Cohesive strength/MPa | 0.91 |
| Thermal conductivity/W/mK | 0.067 | Coefficient of softening | 0.72 |
| Ultimate compression strength/MPa | 0.92 | Linear shrinkage ratio/% | 0.24 |
| Water-intake rate/% | 10 | Combustionproperty | A |
Embodiment 5:
1) pre-treatment of cement: ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, and making its specific surface area is 3500cm
2/ g is that 5:1 mixes by the two mass ratio;
2) modification of glass bead: glass bead is placed in 40% emulsified olefin and soaks 2h, oven dry 3h obtains described modified vitrification micro-bead in 25 ℃ of baking ovens; Unit weight is 140kg/m
3, particle diameter is 0.5mm～1.5mm, the volume water absorption rate is 26%;
3) preparation of mineral micro powder: kaolin, through 800 ℃ of calcinings, is incubated to 3h, and grinding is to specific surface area 4000cm
2/ g; The gained metakaolin is with SILICA FUME in mass ratio for 4:1 mixes, and grinding to specific surface area is 4000cm
2/ g.
4) preparation of exciting agent: the sodium hydroxide after grinding mixes with water glass, adjusts the volume of sodium hydroxide, and making the modulus of water glass is 1.0, obtains exciting agent;
5) preparation of anti-fissuring agent: will grow for the polypropylene fibre of 4mm and the ceramic fiber of 8mm are that 2:1 mixes according to mass ratio, and obtain anti-fissuring agent;
6) preparation of lagging material: be that 200000mPas hydroxypropyl methyl cellulose ether 0.20% and anti-fissuring agent 0.35% take by formula by cement 54%, mineral micro powder 13%, exciting agent 1.40%, redispersable latex powder 1.60%, calcium chloride 0.40%, viscosity by above-mentioned material; then mix; add water; with mortar mixer, stir soon 2min; add 28.8% modified vitrification micro-bead and 0.25% aluminium powder foaming agent (particle diameter 15 μ m); slowly stir 2min; injection molding; normal curing is to 28d; obtain described lagging material, performance is in Table 5.
The performance that table 5 new A level is not fired lagging material
| Project | Lagging material | Project | Lagging material |
| Dry density/kg/m 3 | 280 | Cohesive strength/MPa | 0.88 |
| Thermal conductivity/W/mK | 0.066 | Coefficient of softening | 0.74 |
| Ultimate compression strength/MPa | 0.90 | Linear shrinkage ratio/% | 0.22 |
| Water-intake rate/% | 11 | Combustionproperty | A |
Embodiment 6:
1) pre-treatment of cement: ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, and making its specific surface area is 3500cm
2/ g is that 3:1 mixes by the two mass ratio;
2) modification of glass bead: glass bead is placed in 50% emulsified olefin and soaks 3h, oven dry 4h obtains described modified vitrification micro-bead in 20 ℃ of baking ovens, and unit weight is 120kg/m
3, particle diameter is 0.5mm～1.5mm, the volume water absorption rate is 35%;
3) preparation of mineral micro powder: kaolin, through 800 ℃ of calcinings, is incubated to 3h, and grinding is to specific surface area 3200cm
2/ g; The gained metakaolin is with SILICA FUME in mass ratio for 3:1 mixes, and grinding to specific surface area is 3500cm
2/ g.
4) preparation of exciting agent: the sodium hydroxide after grinding mixes with water glass, adjusts the volume of sodium hydroxide, and making the modulus of water glass is 1.1, obtains exciting agent;
5) preparation of anti-fissuring agent: will grow for the polypropylene fibre of 5mm and the ceramic fiber of 7mm are that 3:1 mixes according to mass ratio, and obtain anti-fissuring agent;
6) preparation of lagging material: be that 150000mPas hydroxypropyl methyl cellulose ether 0.20% and anti-fissuring agent 0.25% take by formula by cement 45%, mineral micro powder 17%, exciting agent 1.80%, redispersable latex powder 1.20%, sodium sulfate 0.60%, viscosity by above-mentioned material; then mix; add water; with mortar mixer, stir soon 2min; add 33.7% modified vitrification micro-bead and 0.25% aluminium powder foaming agent (particle diameter 20 μ m); slowly stir 2min; injection molding; normal curing is to 28d; obtain described lagging material, performance is in Table 6.
The performance that table 6 new A level is not fired lagging material
| Project | Lagging material | Project | Lagging material |
| Dry density/kg/m 3 | 290 | Cohesive strength/MPa | 0.93 |
| Thermal conductivity/W/mK | 0.069 | Coefficient of softening | 0.74 |
| Ultimate compression strength/MPa | 0.95 | Linear shrinkage ratio/% | 0.23 |
| Water-intake rate/% | 9 | Combustionproperty | A |
Claims (8)
1. an A level is not fired lagging material, it is characterized in that being formed through being mixed with by following component, each component and content thereof are: cement 45～60%, modified vitrification micro-bead 24～36%, mineral micro powder 13～26%, exciting agent 1～4%, hardening accelerator 0.02～0.90%, redispersable latex powder 1～3%, foaming agent 0.1～0.3%, anti-fissuring agent 0.20～0.50% and water-holding agent 0.20～0.50%, more than be mass percent, described mineral micro powder is that metakaolin and SILICA FUME are (2～4) in mass ratio: 1 mixture, the preparation method of described metakaolin is: by kaolin through 800 ~ 900 ℃ of calcinings, insulation 2～4h, grinding is to specific surface area 3000～4000cm
2/ g.
2. A level according to claim 1 is not fired lagging material, it is characterized in that described anti-fissuring agent is that 3～5mm polypropylene fibre and 6～10mm ceramic fiber are (2～4) in mass ratio: 1 forms, described water-holding agent is hydroxypropyl methyl cellulose ether, and its viscosity is 50000 ~ 200000mPas.
3. A level according to claim 1 and 2 is not fired lagging material, and it is characterized in that described cement is (3～5) in mass ratio by ordinary Portland cement and aluminosulfate cement: 1 forms.
4. A level according to claim 1 and 2 is not fired lagging material; the preparation method who it is characterized in that described modified vitrification micro-bead is: glass bead is soaked to 3～5h in emulsified olefin solution; under 20～35 ℃, dry 2～4h gained, its unit weight is 120～140kg/m
3, particle diameter is 0.5～2mm, the volume water absorption rate is 20～35%.
5. A level according to claim 1 and 2 is not fired lagging material, it is characterized in that described exciting agent is the mixture of water glass and sodium hydroxide, and wherein the modulus of mixture mesosilicic acid sodium is 0.8～1.2.
6. A level according to claim 1 and 2 is not fired lagging material, it is characterized in that described hardening accelerator is sodium sulfate, calcium chloride or trolamine.
7. A level according to claim 1 and 2 is not fired lagging material, it is characterized in that described foaming agent is aluminium powder, and its particle diameter is 15～25 μ m.
8. the preparation method that in claim 1 to 7, the described A level of arbitrary claim is not fired lagging material is characterized in that comprising the following steps:
1) pre-treatment of cement:
First ordinary Portland cement and aluminosulfate cement are carried out respectively to grinding, making its specific surface area is 2500～4000cm
2/ g, by the two mass ratio, be (3～5): 1 mixes, and obtains cement;
2) modification of glass bead:
Glass bead is soaked to 3～5h in emulsified olefin solution, dry 2～4h gained under 20～35 ℃, its unit weight is 120～140kg/m
3, particle diameter is 0.5～2mm, the volume water absorption rate is 20～35%;
3) preparation of mineral micro powder:
Kaolin, through 800 ~ 900 ℃ of calcinings, is incubated to 2～4h, and grinding is to specific surface area 3000～4000cm
2/ g, be in mass ratio (2～4): 1 mixes metakaolin with SILICA FUME, obtain mineral micro powder;
4) preparation of exciting agent:
Sodium hydroxide after grinding is mixed with water glass, adjust the volume of sodium hydroxide, making the modulus of water glass is 0.8～1.2, obtains exciting agent;
5) preparation of anti-fissuring agent:
By length, be that the polypropylene fibre of 3～5mm and the ceramic fiber of 6～10mm are (2～4) according to mass ratio: 1 mixes, and obtains anti-fissuring agent;
6) preparation of lagging material:
by mineral micro powder, redispersable latex powder, hardening accelerator, cement, exciting agent and anti-fissuring agent take by formula, then they are mixed, add water, stir soon 2～4min, by modified vitrification micro-bead, water-holding agent and foaming agent add in cement slurry, slowly stir 1～2min, injection molding, quietly stop paying out gas and maintenance, obtain described lagging material, each feed composition content is: cement 45～60%, modified vitrification micro-bead 24～36%, mineral micro powder 13～26%, exciting agent 1～4%, hardening accelerator 0.02～0.90%, redispersable latex powder 1～3%, foaming agent 0.1～0.3%, anti-fissuring agent 0.20～0.50% and water-holding agent 0.20～0.50%, more than be mass percent.
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| CN104591654A (en) * | 2015-01-19 | 2015-05-06 | 安徽贵恒环保节能科技有限公司 | Process for manufacturing inorganic vitrified microbead insulating mortar |
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