CN103524101B - A kind of preparation method of inorganic foamed building thermal insulation material - Google Patents
A kind of preparation method of inorganic foamed building thermal insulation material Download PDFInfo
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- CN103524101B CN103524101B CN201310401510.5A CN201310401510A CN103524101B CN 103524101 B CN103524101 B CN 103524101B CN 201310401510 A CN201310401510 A CN 201310401510A CN 103524101 B CN103524101 B CN 103524101B
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- thermal insulation
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Abstract
A preparation method for inorganic foamed building thermal insulation material, be distributed in water by polypropylene fibre stirring, flyash, sulphur aluminosilicate cement, calcium stearate, perlite, Manganse Dioxide and trolamine, do not foamed slip; Then in the slip that do not foam, add the hydrogen peroxide that mass concentration is 30%, then by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material.The volume that the present invention controls manganese dioxide-catalyst reduces its thermal conductivity, enhancing heat insulation effect to control foaming process while ensureing inorganic cellular insulant intensity, and add perlite as anti-sloughing agent to reduce scrap rate, to add the performance that trolamine improves inorganic cellular insulant simultaneously, prepare novel inorganic foam building thermal insulation material, this material has the features such as intensity is high, thermal conductivity is low, unit weight is little, resistance to combustion compared with same type of material.
Description
Technical field
The present invention relates to a kind of preparation method of material of construction, particularly a kind of preparation method of inorganic foamed building thermal insulation material.
Background technology
At present, conventional both at home and abroad building thermal insulation material is divided into organic and inanimate matter two kinds.Organic building thermal insulation material has polystyrene foamed plastics (EPS, XPS), hard foamed poly urethane (PU) etc., and its advantage is light weight, insulation, heat insulation, waterproof.But these organic foam materials are easily aging, can not the life-span same with buildings, within the buildings usage period, need repeatedly to change thermal insulation layer.In addition EPS, XPS, PU etc. are macromolecule organic materials, have inflammable, non-refractory, combustionvelocity fast, produce the defects such as a large amount of toxic gases simultaneously, there is very large disaster hidden-trouble.
Along with energy conservation standard is constantly perfect, fire safety performance requriements is more strict, and the inflammableness defect of organic insulation material seriously hinders its development and application.This is just for mineral-type building thermal insulation material provides vast potential for future development.At present, mineral-type building thermal insulation material on market mainly comprises pearlstone class, air-entrained concrete building block, sulphur aluminosilicate inorganic heat-insulation board etc., the maximum advantage of such material is exactly that fire resistance property is strong, but due to its unit weight, thermal conductivity all higher, be unfavorable for spread.
Generally speaking, how solving the contradiction between the insulation of lagging material, fire prevention, cost, environmental protection, is our problem demanding prompt solution.Development of Novel lagging material not only has a extensive future, and imperative.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of inorganic foamed building thermal insulation material, the method cost is low, and obtained inorganic foamed building thermal insulation material intensity is high, light weight, heat insulating, fire resistance property strong, and good endurance, long service life, environmental protection.
In order to achieve the above object, the technical solution used in the present invention comprises the following steps:
1) polypropylene fibre, flyash, sulphur aluminosilicate cement, Manganse Dioxide, calcium stearate, perlite and trolamine being distributed in water and stirring, do not foamed slip; Wherein, the mass ratio of the polypropylene fibre added, flyash, sulphur aluminosilicate cement, Manganse Dioxide, calcium stearate, perlite and trolamine is (0.2-0.6): (20-35): 40:(0.25 ~ 0.4): (0.3-0.6): (2 ~ 3): (0.20 ~ 0.25);
2) in the slip that do not foam, add the hydrogen peroxide that mass concentration is 30%, then by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material; Wherein, the hydrogen peroxide added is 2.1:(0.25 ~ 0.4 with the mass ratio of the Manganse Dioxide in non-foamed slurry).
The method that in described step 1), polypropylene fibre, flyash, sulphur aluminosilicate cement, Manganse Dioxide, calcium stearate, perlite, trolamine are distributed in water is: first, be distributed in water by polypropylene fibre, and stirring makes to be uniformly dispersed; Then add flyash and sulphur aluminosilicate cement successively, stir; Add Manganse Dioxide again and mix, finally add calcium stearate, perlite and trolamine successively and stir.
The water added in described step 1) and the mass ratio of polypropylene fibre are 40:(0.2-0.6).
Described step 2) before casting, pre-frothing slip is stirred.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention selects hydrogen peroxide as whipping agent, when hydrogen peroxide adds after in the slip do not foamed, gas is transferred out at once in the catalysis of Manganse Dioxide in slip of not foaming, form less bubble, along with the carrying out of reaction, increasing bubble produces, gaseous tension is produced around hydrogen peroxide and in zonule, this pressure acts directly on formed slip, when the shearing stress that gaseous tension causes is greater than slip Limiting shear stress, these bubble sizes increase, the slip that do not foam adding hydrogen peroxide just starts to expand, until foamed, thus obtained inorganic foamed building thermal insulation material.The hole ball-type formed due to decomposing hydrogen dioxide solution is closed and even aperture distribution, and tiny pore can reduce stress concentration, improves the gas tightness of the inorganic foamed building thermal insulation material finally made.
2, the present invention is when the inorganic foamed building thermal insulation material of preparation, volume also by changing Manganse Dioxide controls the decomposition rate of hydrogen peroxide, thus control size and the porosity of bubble in inorganic foamed building thermal insulation material, the inorganic foamed building thermal insulation material obtained has bubble and the porosity of size uniform, while maintenance cellular insulant intensity, reduce thermal conductivity, there is certain apparent density and good heat insulation effect.
3, due to the initial microfracture of sulphur aluminosilicate cement inside containing different scale, hole and defect, when applying external force load, these positions produce the expansion that larger stress can cause crack, finally cause structure deteriorate.The present invention is in order to increase the intensity of final obtained inorganic foamed building thermal insulation material, also add polypropylene fibre as toughener, polypropylene fibre and cement is made to form interpenetrating(polymer)networks pilotaxitic texture, increase the toughness of foam sulphur aluminosilicate cement, reduce the existence of its defect, reduce the stress concentration factor of sulphur aluminosilicate cement internal fissure, effectively improve its splitting resistance, therefore, the inorganic foamed building thermal insulation material good endurance, the long service life that obtain of the present invention.
4, the perlite in the present invention mainly serves the effect of support, skeleton in foaming sulphur aluminosilicate cement, can prevent inorganic foamed building thermal insulation material the subsiding in foaming process obtained.
5, the trolamine that the present invention adds is the permeate agent that reacts of a kind of water and sulphur aluminosilicate cement and reaction promotor, can reduce by the sulphur aluminosilicate cement consumption of 20%, and product ultimate compression strength under comparatively low density is improved greatly.
In addition, foamed cement of the present invention, preparation method is simple, and production cost is low, and environmental protection.
Embodiment
Embodiment 1:
1) polypropylene fibre of 0.20kg is distributed in 40kg water, and stir about 30s makes to be uniformly dispersed; Then add the sulphur aluminosilicate cement of the flyash of 25kg, 40kg successively, stir 1min and make evenly; Add the Manganse Dioxide of 0.25kg again and mix; Last add the calcium stearate of 0.44kg, the perlite of 2kg and 0.20kg successively trolamine and stir 30s and make to mix, do not foamed slip;
2) in non-foamed slurry, add the hydrogen peroxide that 2.10kg mass concentration is 30%, then stir 15s, by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting etc., obtain inorganic foamed building thermal insulation material.
Embodiment 2:
1) be distributed in 40kg water by the polypropylene fibre of 0.20kg, stir about 30s makes to be uniformly dispersed; Then add the sulphur aluminosilicate cement of the flyash of 25kg, 40kg successively, stir 1min and make evenly; Add the Manganse Dioxide of 0.40kg again and mix; Last add the calcium stearate of 0.44kg, the perlite of 2.5kg and 0.22kg successively trolamine and stir 30s and make to mix, do not foamed slip;
2) in the slip that do not foam, add the hydrogen peroxide that 2.10kg mass concentration is 30%, then stir 15s, by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material.
Embodiment 3:
1) be distributed in 40kg water by the polypropylene fibre of 0.20kg, stir about 30s makes to be uniformly dispersed; Then add the sulphur aluminosilicate cement of the flyash of 25kg, 40kg successively, stir 1min and make evenly; Add the Manganse Dioxide of 0.3kg again and mix; Finally add the trolamine of the calcium stearate of 0.44kg, the perlite of 3kg and 0.20kg successively and stir 30s, make to mix, do not foamed slip;
2) in the slip that do not foam, add the hydrogen peroxide that 2.10kg mass concentration is 30%, then stir 15s, by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material.
Embodiment 4:
1) be distributed in 40kg water by the polypropylene fibre of 0.20kg, stir about 30s makes to be uniformly dispersed; Then add the sulphur aluminosilicate cement of the flyash of 25kg, 40kg successively, stir 1min and make evenly; Add the Manganse Dioxide of 0.35kg again and mix; Finally add the trolamine of the calcium stearate of 0.44kg, the perlite of 2.60kg and 0.20kg successively and stir 30s, make to mix, do not foamed slip;
2) in the slip that do not foam, add the hydrogen peroxide that 2.10kg mass concentration is 30%, then stir 15s, by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material.
Embodiment 5:
1) be distributed in 40kg water by the polypropylene fibre of 0.60kg, stir about 30s makes to be uniformly dispersed; Then add the sulphur aluminosilicate cement of the flyash of 20kg, 40kg successively, stir 1min and make evenly; Add the Manganse Dioxide of 0.40kg again and mix; Last add the calcium stearate of 0.6kg, the perlite of 2.5kg and 0.25kg successively trolamine and stir 30s and make to mix, do not foamed slip;
2) in the slip that do not foam, add the hydrogen peroxide that 2.10kg mass concentration is 30%, then stir 15s, by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material.
Embodiment 6:
1) be distributed in 40kg water by the polypropylene fibre of 0.40kg, stir about 30s makes to be uniformly dispersed; Then add the sulphur aluminosilicate cement of the flyash of 35kg, 40kg successively, stir 1min and make evenly; Add the Manganse Dioxide of 0.35kg again and mix; Finally add the trolamine of the calcium stearate of 0.34kg, the perlite of 2.60kg and 0.20kg successively and stir 30s, make to mix, do not foamed slip;
2) in the slip that do not foam, add the hydrogen peroxide that 2.10kg mass concentration is 30%, then stir 15s, by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material.
The mechanism of action in the preparation process of the inorganic foamed building thermal insulation material of the present invention is as follows:
Under normal temperature condition, select hydrogen peroxide as whipping agent, the present invention adopts Manganse Dioxide as catalyzer, decomposes and produce bubble under its effect.Air Bubble Size and speed of reaction is controlled by the volume of Manganse Dioxide.Manganse Dioxide catalyzed reaction principle is:
MnO
2+H
2O
2+2H
+=Mn
2++O
2+2H
2O
H
2O
2+Mn
2+=MnO
2+2H
+
Hydrogen peroxide contacts in a flash with the non-foamed slurry containing Manganse Dioxide, sulphur aluminosilicate cement, just starts to release gas, forms less bubble; Along with the carrying out of reaction, bubble produces in a large number.
The apparent density of inorganic foamed building thermal insulation material of the present invention, intensity and heat-insulating property are determined by the structure of pore and porosity to a great extent.The hole ball-type that the present invention is formed due to decomposing hydrogen dioxide solution is closed and even aperture distribution, and tiny pore can reduce stress concentration.The bubble produced forms closed pore bubble at sulphur aluminosilicate cement gel body or particle surface, effectively can hinder gas flow, avoid the transmission of air-flow heat, thus improve the heat-insulating property of inorganic foamed building thermal insulation material.Meanwhile, membrane structure can also effectively stop moisture content to enter foam interior, greatly reduces the water-intake rate of material, thus ensures material thermal and insulating performance in wet condition.
The present invention is (0.25 ~ 0.4) by controlling the mass ratio of Manganse Dioxide and sulphur aluminosilicate cement: 40, makes whole foaming process be no more than 15min, and the bubble produced more than 15min can make the intensity of product obviously reduce; Thus make inorganic foamed building thermal insulation material have bubble and the porosity of size uniform, while maintenance cellular insulant intensity, reduce thermal conductivity, strengthen its heat insulation effect;
In addition, the initial microfracture of sulphur aluminosilicate cement inside containing different scale, hole and defect, when applying external force load, these positions produce the expansion that larger stress can cause crack, finally cause structure deteriorate.In order to increase the intensity of sulphur aluminosilicate cement, polypropylene fibre (PP fiber) is added in slip, itself and inorganics is made to form interpenetrating(polymer)networks pilotaxitic texture, increase the toughness of foam sulphur aluminosilicate cement, reduce the existence of its defect, reduce the stress concentration factor of sulphur aluminosilicate cement internal fissure, effectively improve its splitting resistance.
The trolamine that the present invention adds is the permeate agent that reacts of a kind of water and sulphur aluminosilicate cement and reaction promotor, cement and water are fully reacted, by adding the sulphur aluminosilicate cement consumption that trolamine can reduce 20%, and product ultimate compression strength under comparatively low density is improved greatly.
The present invention by control trolamine with sulphur aluminosilicate cement quality than in (0.2 ~ 0.25): 40, such trolamine just can promote that water fully contacts with sulphur aluminosilicate cement and reacts, the intensity of the inorganic foamed building thermal insulation material of effective raising.
The present invention is also by controlling the mass ratio of perlite and sulphur aluminosilicate cement in (2 ~ 3): 40 prevent subsiding in foaming process.Perlite in foaming sulphur aluminosilicate cement mainly plays support, skeleton, can prevent subsiding of lagging material.
Perlite of the present invention is as anti-sloughing agent, trolamine makes permeate agent and reaction promotor, polypropylene fibre is as toughener, therefore, compared with traditional lagging material, the inorganic foamed building thermal insulation material that the present invention makes is while maintenance common building materials feature, and not only intensity is high, light weight, heat insulating, fire resistance property are strong, and good endurance, long service life, environmental protection, be convenient to promote the use of.
Claims (2)
1. a preparation method for inorganic foamed building thermal insulation material, is characterized in that, comprises the following steps:
1) polypropylene fibre, flyash, sulphur aluminosilicate cement, Manganse Dioxide, calcium stearate, perlite and trolamine being distributed in water and stirring, do not foamed slip; Wherein, the mass ratio of the polypropylene fibre added, flyash, sulphur aluminosilicate cement, Manganse Dioxide, calcium stearate, perlite and trolamine is (0.2-0.6): (20-35): 40:(0.25 ~ 0.4): (0.3-0.6): (2 ~ 3): (0.20 ~ 0.25); The mass ratio of water and polypropylene fibre is 40:(0.2-0.6);
The method that polypropylene fibre, flyash, sulphur aluminosilicate cement, Manganse Dioxide, calcium stearate, perlite, trolamine are distributed in water is: first, be distributed in water by polypropylene fibre, and stirring makes to be uniformly dispersed; Then add flyash and sulphur aluminosilicate cement successively, stir; Add Manganse Dioxide again and mix, finally add calcium stearate, perlite and trolamine successively and stir;
2) in the slip that do not foam, add the hydrogen peroxide that mass concentration is 30%, then by shaping for the pre-frothing slip casting obtained, then through maintenance, the demoulding, cutting, obtain inorganic foamed building thermal insulation material; Wherein, the hydrogen peroxide added is 2.1:(0.25 ~ 0.4 with the mass ratio of the Manganse Dioxide in non-foamed slurry).
2. the preparation method of a kind of inorganic foamed building thermal insulation material according to claim 1, is characterized in that, described step 2) before casting, pre-frothing slip is stirred.
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| CN104478364B (en) * | 2014-12-25 | 2016-08-17 | 王明忠 | A kind of foam concrete heat insulation building block and production method thereof |
| CN104609782A (en) * | 2014-12-30 | 2015-05-13 | 青建集团股份公司 | Preparation method of low-density concrete thermal insulation composite material |
| CN108164228A (en) * | 2017-12-29 | 2018-06-15 | 安徽乐享家装饰设计有限公司 | A kind of preparation method of foamed heat insulating type construction material |
| CN108129111A (en) * | 2017-12-29 | 2018-06-08 | 安徽乐享家装饰设计有限公司 | A kind of foamed heat insulating type construction material |
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| CN103232259A (en) * | 2013-04-02 | 2013-08-07 | 陕西科技大学 | Preparation method for inorganic noninflammable lightweight foamed cement |
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