CN101514111A - Method for preparing porous gypsum insulation material - Google Patents
Method for preparing porous gypsum insulation material Download PDFInfo
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- CN101514111A CN101514111A CNA2009100971762A CN200910097176A CN101514111A CN 101514111 A CN101514111 A CN 101514111A CN A2009100971762 A CNA2009100971762 A CN A2009100971762A CN 200910097176 A CN200910097176 A CN 200910097176A CN 101514111 A CN101514111 A CN 101514111A
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Abstract
The invention discloses a method for preparing a porous gypsum insulation material. The hemihydrate gypsum powder, an aerogenic agent A, a thickener, a coagulation conditioning agent are mixed with stirring uniformly to form a powder, an aerogenic agent B is dissolved in water to form a solution, the powder and the solution are mixed uniformly, the aerogenic agent A and aerogenic agent B are reacted in the hydration process of gypsum, the gas such as carbon dioxide is released, the porous gypsum insulation material is formed after the solidification of the gypsum is over. The aerogenic agent A is bicarbonate, the aerogenic agent B is sulfate of which the hydrolysate is acidic. The method has simple process, the main material is nontoxic and non-pollution inorganic mineral, the product after the gas producing reaction besides carbon dioxide is the necessary ingredient for the porous gypsum insulation material, and the porous gypsum insulation material is environment-friendly.
Description
Technical field
The invention belongs to the inorganic coagulation material applied technical field, be specifically related to a kind of inorganic foamed method for preparing porous gypsum insulation material of utilizing.
Background technology
Building energy conservation has become one of central task of Building Trade in China.According to the prediction of relevant department, energy for building is about 20% of national total energy consumption, and material of construction energy consumption is in use occupied significant proportion.In order to reduce the heat lost by radiation of buildings, adopting the good material of construction of heat-insulating property is an important measures.
Cement, lime, gypsum are three traditional big gelling material.Cement and lime consume energy greatly, discharge the CO that causes Greenhouse effect in a large number in process of production
2Comparatively speaking, the production of gypsum material and the energy consumption of use are low, can not produce greenhouse gases, and the thermal conductivity of gypsum is littler, and certain heat-insulating property is arranged.China is the profuse country of gypsum resource, and the reserves of the plaster of paris occupy first of the world, therefore greatly develop the gypsum insulation material of construction and tally with the national condition, and obvious environment benefit.
Gypsum insulation material has obtained extensive studies and application.On the mechanism of insulation, the material heat-insulating property is determined by two aspects: the one, and the material of lagging material; The 2nd, the porosity of lagging material, the porosity increase means that solid matter reduces, the corresponding thermal conductivity that reduces material, thus obtain heat insulation effect preferably.From the first aspect raising heat-insulating property of starting with, can in gypsum, add aglite, as pearlstone, polystyrene foam etc.Yet, the pearlstone water-absorbent is strong, easily efflorescence, volumetric shrinkage is big in the slip construction, make that the product later strength is little, heat-insulating property reduces, and the lagging material that polystyrene foam makes has that heatproof is low, intensity is little, meet that fiery high temperature produces obnoxious flavour down and ageing resistance is poor, shortcoming such as bounce-back easily in the construction.Therefore, the porosity of raising gypsum material, preparation multi-hole type gypsum material are another outlets that improves the gypsum material heat-insulating property.The multi-hole type gypsum material also helps the unit weight that reduces plastering, the load that reduces building structure, helps improving the soundproof effect in the buildings.
The preparation method of multi-hole type gypsum material is various.Can adopt the way that adds organic additives such as tensio-active agent, water, tensio-active agent and terra alba are stirred fast, make enough inclusion of air wherein, form foamed slurry passively, obtain the multi-hole type gypsum material behind the hydration and hardening, as publication number is the patent of invention of CN1458912, has reported that the passive one-tenth infusion of a kind of surfactant composition is equipped with the multi-hole type gypsum material.The multi-hole type gypsum material also can prepare with the method for inorganic active foaming.As publication number is the application for a patent for invention of CN101094822, reported a kind of inorganic foamed method for preparing gypsum material, semi-hydrated gypsum has been mixed with lime carbonate, again with the dilute phosphoric acid aqueous solution, lime carbonate and phosphatase reaction produce carbonic acid gas, form the multi-hole type gypsum; Publication number is the application for a patent for invention of CN1332133, has reported a kind of method for preparing foaming plaster, and plaster of Paris and a kind of mixed solution are stirred, react, and this mixed solution is made up of 93% vitriol oil and water.
Adopt cheap and easy to get, environment and body harmless's inorganic mineral is prepared the multi-hole type gypsum as whipping agent, be a kind of green technology of preparing, meet multi-hole type gypsum material technology of preparing developing direction.
Summary of the invention
The invention provides a kind of inorganic foamed preparation method of porous gypsum insulation material, can obtain the multi-hole type gypsum material that unit weight is little, can effectively reduce buildings deadweight or given tensile load, heat-insulating property excellence.
A kind of preparation method of porous gypsum insulation material comprises: semi-hydrated gypsum powder, gas generating agent A, thickening material, the conditioning agent that condenses are stirred make powder; B is prepared into the aqueous solution with gas generating agent; Again above-mentioned powder and solution are mixed stirring, gas generating agent A and gas generating agent B discharge carbon dioxide reacting in the process of gypsum aquation, along with the condensation cure of gypsum, form porous gypsum insulation material at last.
Semi-hydrated gypsum powder is αBan Shuishigao powder or β semi-hydrated gypsum powder.
Described gas generating agent A is an acid carbonate, as bicarbonate of ammonia, sodium bicarbonate, Calcium hydrogen carbonate or saleratus; Described gas generating agent B is that hydrolysis is tart vitriol, general strong acid weak base salt all can, preferably sulfuric acid aluminium potassium or Tai-Ace S 150.The inventive method has selected for use two kinds of specific gas generating agents jointly as whipping agent, it is acid that gas generating agent B hydrolysis wherein is, and gas generating agent A acid carbonate decomposed produce carbonic acid gas, particularly when gas generating agent B is aluminium salt, because it is aluminium salt has certain pectisation, favourable to the intensity that strengthens gypsum.
The interpolation total amount of described gas generating agent A and gas generating agent B is the 0.1-5% of terra alba quality, and the ratio between two kinds of materials of A, B can be determined according to the reaction formula of reaction generation carbonic acid gas.
Described thickening material is an ether of cellulose, and as carboxymethyl cellulose, Natvosol or methylcellulose gum, addition is the 0.1-2.5% of terra alba quality.
The described conditioning agent that condenses is dihydrate gypsum, flyash, volcanic ash, and addition is the 0.5-25% of terra alba quality
Gypsum began aquation and condenses when gas generating agent A and B began to react aerogenesis, and slip is solidified, and formed good vesicular structure.Fast if get angry, condense slowly, the inner abscess that forms of slip can subside and overflows because of deadweight; Slow if get angry, it is fast to condense, and the gypsum volume expansivity is low, crackle may occur, that is to say the harmonious ideal multi-hole type gypsum that just can obtain of the process of only getting angry and condensing process.Therefore, must add the conditioning agent that condenses, in order to regulate the time of coagulation of gypsum.Moreover behind the gas generating agent bubbling, if gypsum slurry viscosity is too small, then bubble is overflowed easily, is unfavorable for forming uniform multi-hole type gypsum material, therefore needs to add thickening material.
The invention has the beneficial effects as follows:
(1) the present invention adopts acid carbonate to decompose and produces carbon dioxide, and with the spontaneous foaming of carbon dioxide that produces, technology is simple.
(2) multi-hole type gypsum material of the present invention, its raw material and auxiliary material all have green characteristics, and be nontoxic, tasteless, harmless, and have non-combustible characteristic; The solid product of air-generating reaction is the necessary component of product, and product is not had any disadvantageous effect.
(3) multi-hole type gypsum material of the present invention, thermal conductivity is low, has insulation, heat-proof quality;
(4) multi-hole type gypsum material of the present invention has the little characteristics of unit weight, effectively reduces the deadweight of buildings and to the burden of given tensile load;
(5) multi-hole type gypsum material stable physical property of the present invention has excellent ultimate compression strength.
Embodiment
Embodiment 1
Quality with αBan Shuishigao is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A sodium bicarbonate 0.6%
Gas generating agent B Tai-Ace S 150 0.4%
Thickening material Natvosol 0.2%
Conditioning agent flyash 12% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of αBan Shuishigao stirring formation, according to water cement ratio 0.30 (mass ratio), B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 14.8MPa, 1d folding strength 5.47MPa, unit weight 971kg/m
3, thermal conductivity 0.17W/mK.
Embodiment 2
Quality with αBan Shuishigao is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A sodium bicarbonate 0.6%
Gas generating agent B potassium aluminium sulfate 0.6%
Thickening material carboxymethyl cellulose 0.4%
Conditioning agent dihydrate gypsum 16% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of αBan Shuishigao stirring formation, according to water cement ratio 0.31, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 13.5MPa, 1d folding strength 4.91MPa, unit weight 932kg/m
3, thermal conductivity 0.16W/mK.
Embodiment 3
Quality with αBan Shuishigao is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A saleratus 0.7%
Gas generating agent B potassium aluminium sulfate 0.9%
Thickening material Natvosol 0.1%
Conditioning agent flyash 7% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of αBan Shuishigao stirring formation, according to water cement ratio 0.30, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 16.2MPa, 1d folding strength 6.22MPa, unit weight 1048kg/m
3, thermal conductivity 0.18W/mK.
Embodiment 4
Quality with αBan Shuishigao is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A bicarbonate of ammonia 0.2%
Gas generating agent B Tai-Ace S 150 0.3%
Thickening material methylcellulose gum 0.3%
Conditioning agent dihydrate gypsum 8% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of αBan Shuishigao stirring formation, according to water cement ratio 0.31, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 20.5MPa, 1d folding strength 7.04MPa, unit weight 1337g/m
3, thermal conductivity 0.22W/mK.
Embodiment 5
Quality with αBan Shuishigao is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A Calcium hydrogen carbonate 1.0%
Gas generating agent B potassium aluminium sulfate 2.2%
Thickening material methylcellulose gum 0.3%
Conditioning agent volcanic ash 8% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of αBan Shuishigao stirring formation, according to water cement ratio 0.32, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 18.5MPa, 1d folding strength 5.97MPa, unit weight 1238kg/m
3, thermal conductivity 0.21W/mK.
Embodiment 6
Quality with αBan Shuishigao is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A Calcium hydrogen carbonate 1.0%
Gas generating agent B potassium aluminium sulfate 2.0%
Thickening material carboxymethyl cellulose 0.6%
Conditioning agent volcanic ash 6% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.31, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 19.2MPa, 1d folding strength 5.88MPa, unit weight 1213kg/m
3, thermal conductivity 0.20W/mK.
Embodiment 7
Quality with the β semi-hydrated gypsum is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A sodium bicarbonate 0.4%
Gas generating agent B Tai-Ace S 150 0.4%
Thickening material carboxymethyl cellulose 0.3%
Conditioning agent flyash 4% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.30, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 15.2MPa, 1d folding strength 5.26MPa, unit weight 1206kg/m
3, thermal conductivity 0.20W/mK.
Embodiment 8
Quality with the β semi-hydrated gypsum is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A sodium bicarbonate 0.4%
Gas generating agent B potassium aluminium sulfate 0.3%
Thickening material methylcellulose gum 0.4%
Conditioning agent flyash 11% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.31, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 7.8MPa, 1d folding strength 2.44MPa, unit weight 1172kg/m
3, thermal conductivity 0.19W/mK.
Embodiment 9
Quality with the β semi-hydrated gypsum is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A saleratus 0.4%
Gas generating agent B Tai-Ace S 150 0.4%
Thickening material carboxymethyl cellulose 0.2%
Conditioning agent flyash 4% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.30, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 8.3MPa, 1d folding strength 2.52MPa, unit weight 1243kg/m
3, thermal conductivity 0.21W/mK.
Embodiment 10
Quality with the β semi-hydrated gypsum is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A bicarbonate of ammonia 0.3%
Gas generating agent B potassium aluminium sulfate 0.8%
Thickening material hydroxyl second methylcellulose gum 0.3%
Conditioning agent dihydrate gypsum 10% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.31, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 7.7MPa, 1d folding strength 3.09MPa, unit weight 1312kg/m
3, thermal conductivity 0.22W/mK.
Embodiment 11
Quality with the β semi-hydrated gypsum is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A Calcium hydrogen carbonate 0.8%
Gas generating agent B Tai-Ace S 150 1.4%
Thickening material hydroxyl second methylcellulose gum 0.3%
Conditioning agent dihydrate gypsum 12% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.32, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 7.5MPa, 1d folding strength 2.91MPa, unit weight 1272kg/m
3, thermal conductivity 0.21W/mK.
Embodiment 12
Quality with the β semi-hydrated gypsum is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A sodium bicarbonate 0.8%
Gas generating agent B Tai-Ace S 150 2.0%
Thickening material methylcellulose gum 0.6%
Conditioning agent volcanic ash 6% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.32, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 6.8MPa, 1d folding strength 2.62MPa, unit weight 1218kg/m
3, thermal conductivity 0.20W/mK.
Embodiment 13
Quality with the β semi-hydrated gypsum is a benchmark, and the mass ratio that adds each component is:
Gas generating agent A Calcium hydrogen carbonate 0.8%
Gas generating agent B zinc sulfate 2.8%
Thickening material methylcellulose gum 0.6%
Conditioning agent volcanic ash 6% condenses
With gas generating agent A, thickening material and condense conditioning agent and the even powder of β semi-hydrated gypsum stirring formation, according to water cement ratio 0.32, B is soluble in water with gas generating agent, powder is added wherein to stir again.Behind the hydration and hardening, particular product performance parameters is: 1d ultimate compression strength 6.5MPa, 1d folding strength 2.34MPa, unit weight 1237kg/m
3, thermal conductivity 0.20W/mK.
Claims (8)
1, a kind of preparation method of porous gypsum insulation material, it is characterized in that: semi-hydrated gypsum powder, gas generating agent A, thickening material, the conditioning agent that condenses are stirred make powder, with the water-soluble solution of making of gas generating agent B, again above-mentioned powder and solution are mixed, gas generating agent A and B react in the process of gypsum aquation, discharge atmospheric carbon dioxide,, form porous gypsum insulation material at last along with the condensation cure of gypsum;
Described gas generating agent A is an acid carbonate, and described gas generating agent B is that hydrolysis is tart vitriol.
2, preparation method as claimed in claim 1 is characterized in that: described semi-hydrated gypsum powder is αBan Shuishigao powder or β semi-hydrated gypsum powder.
3, preparation method as claimed in claim 1 is characterized in that: described gas generating agent A is bicarbonate of ammonia, sodium bicarbonate, Calcium hydrogen carbonate or saleratus.
4, preparation method as claimed in claim 1 is characterized in that: described gas generating agent B is Tai-Ace S 150, zinc sulfate or potassium aluminium sulfate.
5, preparation method as claimed in claim 1 is characterized in that: the interpolation total amount of described gas generating agent A and gas generating agent B is the 0.1-5% of semi-hydrated gypsum powder quality.
6, preparation method as claimed in claim 1 is characterized in that: described thickening material is an ether of cellulose, and addition is the 0.1-2.5% of terra alba quality.
7, preparation method as claimed in claim 6 is characterized in that: described ether of cellulose is carboxymethyl cellulose, Natvosol or methylcellulose gum.
8, preparation method as claimed in claim 1 is characterized in that: the described conditioning agent that condenses is dihydrate gypsum, flyash, volcanic ash, and addition is the 0.5-25% of terra alba quality.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100971762A CN101514111A (en) | 2009-03-26 | 2009-03-26 | Method for preparing porous gypsum insulation material |
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| CNA2009100971762A CN101514111A (en) | 2009-03-26 | 2009-03-26 | Method for preparing porous gypsum insulation material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531516A (en) * | 2011-12-30 | 2012-07-04 | 刘立文 | Glass fiber reinforcing tyre casting gypsum powder and preparation method thereof |
| CN102531514A (en) * | 2011-12-30 | 2012-07-04 | 刘立文 | Carbon fiber reinforcing tyre casting gypsum powder and preparation method thereof |
| CN103232260A (en) * | 2013-04-09 | 2013-08-07 | 浙江大学 | Waterproof insulation lightweight high-strength gypsum sheet material and preparation method thereof |
| CN107226668A (en) * | 2017-05-02 | 2017-10-03 | 武汉理工大学 | A kind of high strong water resistant type glass fiber reinforcement toughness reinforcing plasterboard and preparation method thereof |
| CN108358597A (en) * | 2018-02-01 | 2018-08-03 | 长兴科创科技咨询有限公司 | It is a kind of using blast furnace flyash as the light block of raw material |
| CN108373338A (en) * | 2018-02-01 | 2018-08-07 | 长兴科创科技咨询有限公司 | A method of using blast furnace flyash light block is prepared for raw material |
| CN112479665A (en) * | 2019-09-11 | 2021-03-12 | 韩超 | Gypsum-based floor paving system with heat preservation and heat insulation functions and construction method |
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2009
- 2009-03-26 CN CNA2009100971762A patent/CN101514111A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531516A (en) * | 2011-12-30 | 2012-07-04 | 刘立文 | Glass fiber reinforcing tyre casting gypsum powder and preparation method thereof |
| CN102531514A (en) * | 2011-12-30 | 2012-07-04 | 刘立文 | Carbon fiber reinforcing tyre casting gypsum powder and preparation method thereof |
| CN102531514B (en) * | 2011-12-30 | 2013-11-27 | 刘立文 | Carbon fiber reinforcing tyre casting gypsum powder and preparation method thereof |
| CN103232260A (en) * | 2013-04-09 | 2013-08-07 | 浙江大学 | Waterproof insulation lightweight high-strength gypsum sheet material and preparation method thereof |
| CN103232260B (en) * | 2013-04-09 | 2015-02-25 | 浙江大学 | Waterproof insulation lightweight high-strength gypsum sheet material and preparation method thereof |
| CN107226668A (en) * | 2017-05-02 | 2017-10-03 | 武汉理工大学 | A kind of high strong water resistant type glass fiber reinforcement toughness reinforcing plasterboard and preparation method thereof |
| CN107226668B (en) * | 2017-05-02 | 2019-10-25 | 武汉理工大学 | A kind of high strong water resistant type glass fiber reinforcement toughening plasterboard and preparation method thereof |
| CN108358597A (en) * | 2018-02-01 | 2018-08-03 | 长兴科创科技咨询有限公司 | It is a kind of using blast furnace flyash as the light block of raw material |
| CN108373338A (en) * | 2018-02-01 | 2018-08-07 | 长兴科创科技咨询有限公司 | A method of using blast furnace flyash light block is prepared for raw material |
| CN108373338B (en) * | 2018-02-01 | 2021-01-08 | 长兴科创科技咨询有限公司 | Method for preparing light building block by using blast furnace fly ash as raw material |
| CN112479665A (en) * | 2019-09-11 | 2021-03-12 | 韩超 | Gypsum-based floor paving system with heat preservation and heat insulation functions and construction method |
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Open date: 20090826 |