CN113461404B - SiO (silicon dioxide) 2 Aerogel-gypsum-based thermal insulation material and preparation method thereof - Google Patents
SiO (silicon dioxide) 2 Aerogel-gypsum-based thermal insulation material and preparation method thereof Download PDFInfo
- Publication number
- CN113461404B CN113461404B CN202110841633.5A CN202110841633A CN113461404B CN 113461404 B CN113461404 B CN 113461404B CN 202110841633 A CN202110841633 A CN 202110841633A CN 113461404 B CN113461404 B CN 113461404B
- Authority
- CN
- China
- Prior art keywords
- aerogel
- sio
- gypsum
- insulation material
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a SiO 2 The aerogel-gypsum-based heat insulating material is prepared from building gypsum and SiO 2 Prepared by blending aerogel and water, and used for buildingGypsum and SiO 2 SiO based on the total mass of aerogel 2 The doping mass percentage of the aerogel is 2-50%; the invention also discloses SiO prepared by the method 2 Aerogel-gypsum based insulation. The method of the invention uses building gypsum and SiO 2 Preparation of SiO by blending aerogel as raw material with water 2 Aerogel-gypsum based insulation material to make SiO 2 The aerogel is uniformly dispersed in the building gypsum, the heat insulation performance of the material is enhanced, the specific gravity of the material is reduced, the process is simple, foaming is not needed, and other additional or modified materials are not needed.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to SiO 2 Aerogel-gypsum-based thermal insulation material and a preparation method thereof.
Background
China always faces the problems of low energy utilization rate and high building energy consumption, for example, more than 90% of the existing buildings and more than 80% of newly added buildings do not reach the standard requirements; and the energy consumption of China is 2 to 3 times higher than that of other countries (with the same climate condition). As the countries with the most energy consumption in the world, the building energy consumption accounts for about 33 percent of the total energy consumption. With the acceleration of urban and rural construction in China, more and more civil and commercial buildings are put into use, and the consumption of a large amount of energy is also accompanied in the use process, such as air conditioning, heating, building illumination and the like, which belong to building operation energy consumption, and the energy consumption can exist in the operation of buildings all the time.
It is worth noting that the energy-saving buildings of residential houses have the advantages of fast cost recovery (within five years) and high energy-saving efficiency (about 50% of energy can be easily achieved) under the condition of low investment cost. In order to meet the building energy-saving requirements of areas with hot summer and cold winter and areas with hot summer and warm winter, the building heat-insulating material has become the main research direction of building energy saving. It is urgent to develop a heat-insulating material that can insulate heat and preserve heat, or a heat-insulating material that mainly insulates heat.
Gypsum and its products are one of the earliest cementing materials for human application, and because of its excellent sound-proof, heat-insulating, humidity-regulating and fire-proof properties, and its light weight and convenient processing, it is a green environment-friendly building material, which is widely noticed by scholars at home and abroad. With the development of the times, people have increasingly strict requirements on the performance of green heat-insulating materials, and the developed high-end gypsum board with high strength, fire resistance, sound absorption, heat storage, adsorption and purification and other functions becomes one of important directions for the development of novel building materials and gypsum industries. Aerogel can be used not only as a heat insulating material, but also as an acoustic impedance material and a fireproof material. Therefore, the development of the aerogel-gypsum-based thermal insulation material has very important research significance.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a SiO in order to overcome the above-mentioned deficiencies of the prior art 2 A preparation method of aerogel-gypsum-based thermal insulation material. The method uses building gypsum and SiO 2 Preparation of SiO by blending aerogel as raw material with water 2 Aerogel-gypsum based insulation material to make SiO 2 The aerogel is uniformly dispersed in the building gypsum, the heat insulation performance of the material is enhanced, the specific gravity of the material is reduced, the process is simple, foaming is not needed, and other additional or modified materials are not needed.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: siO (silicon dioxide) 2 The preparation method of the aerogel-gypsum-based heat insulation material is characterized by comprising building gypsum and SiO 2 Prepared by blending aerogel and water and prepared by mixing building gypsum and SiO 2 SiO based on the total mass of aerogel 2 The doping mass percentage of the aerogel is 2-50%.
The invention uses building gypsum and SiO 2 Preparation of SiO by blending aerogel as raw material with water 2 Aerogel-gypsum based insulation material to make SiO 2 The aerogel is uniformly dispersed in the building gypsum, the heat insulation performance of the material is enhanced, the specific gravity of the material is reduced, the process is simple, foaming is not needed, and other additional or modified materials are not needed.
An SiO 2 Aerogel-a method for the preparation of a gypsum-based insulation material, characterized in that the phase of the building gypsum is calcium sulphate hemihydrate. The building gypsum adopted by the invention is mainly prepared by dehydrating natural gypsum or industrial by-product gypsum and is prepared by beta calcium sulfate hemihydrate (beta-CaSO) 4 ˙1/2H 2 O) is taken as a main component, and the powdery cementing material without any additive or additive is used as the heat-insulating material, thereby being beneficial to improving the mechanical property of the heat-insulating material.
An SiO 2 The preparation method of the aerogel-gypsum-based thermal insulation material is characterized in that the SiO 2 The aerogel is heat-insulating dispersed SiO 2 Aerogel paste. The invention preferably adopts heat insulation dispersion type SiO 2 Aerogel paste, in favor of SiO 2 The aerogel is fully and uniformly dispersed in the building gypsum, and the heat insulation performance of the heat insulation material is further improved.
An SiO 2 The preparation method of the aerogel-gypsum-based thermal insulation material is characterized in that the SiO 2 The aerogel is uniformly dispersed in the building gypsum without aggregation and agglomeration.
SiO as described above 2 The preparation method of the aerogel-gypsum-based thermal insulation material is characterized by comprising the following steps of:
step one, sieving building gypsum to obtain gypsum powder;
step two, sampling the gypsum powder obtained in the step one and mixing the gypsum powder with SiO 2 Uniformly mixing the aerogels to obtain a mixed sample, and then measuring the standard consistency expansion degree of the mixed sample to obtain the water consumption of the standard consistency of the mixed sample;
step three, mixing the gypsum powder obtained in the step one with SiO 2 Uniformly mixing the aerogel to obtain a mixture A, weighing water according to the standard consistency of the mixed sample obtained in the step two, and uniformly mixing the water with the mixture A to prepare slurry A;
or weighing water according to the standard consistency of the mixed sample obtained in the step two and mixing the water with SiO 2 Stirring and uniformly mixing aerogel to obtain a mixture B, then adding the gypsum powder obtained in the step one, stirring and uniformly mixing,preparing slurry B;
and building gypsum and SiO 2 Taking the total mass of the aerogel as a reference, and taking SiO in the slurry A and the slurry B as the reference 2 Aerogel doping mass percent and SiO in the step two mixed sample 2 The doping mass percentage of the aerogel is the same;
pouring the slurry A or the slurry B obtained in the step three into a mold, demolding after curing, curing to an age, and drying to obtain SiO 2 Aerogel-gypsum based insulation.
The invention uses building gypsum and SiO 2 Aerogel is used as a raw material, two different mixing sequences are respectively adopted, and the feeding sequence of the raw material is explored for SiO 2 The performance influence of the aerogel-gypsum-based heat-insulating material specifically comprises the following steps: (1) Firstly, gypsum powder and SiO 2 Uniformly mixing aerogel and adding water to obtain slurry A; due to SiO 2 The aerogel is hydrophobic paste, and is mixed with gypsum powder uniformly to obtain SiO 2 The inside water of aerogel reacts with the gesso, form a large amount of even aerogel microballons that distribute, after adding water again, the clearance of aerogel microballon or the adnexed gesso in surface take place the hydration for the aerogel microballon is wrapped up in the gypsum slurry, and its surface smoothness nature and mobility all obtain improving, and in the follow-up stoving process, the moisture in aerogel microballon and the gesso volatilizees, forms the structure that forms by the gathering of a large amount of regular honeycomb holes, therefore the SiO that the preparation obtained 2 The dry density and the heat conductivity coefficient of the aerogel-gypsum-based heat insulation material are low; (2) Firstly, water and SiO 2 Uniformly mixing aerogel and then adding gypsum powder to obtain slurry B; due to SiO 2 The aerogel is in a hydrophobic paste shape, is easy to gather and float on the water surface after being mixed with water, cannot be fully mixed, after the gypsum powder is added, a part of the gypsum powder directly reacts with the water to generate slurry, and the slurry is mixed with SiO 2 Mixing the aerogel, and mixing the other part of gypsum powder and SiO 2 The water in the aerogel reacts to form aerogel microspheres, the number of the aerogel microspheres is greatly reduced, the wrapping property and the dispersity of the aerogel microspheres are also greatly reduced, the surface smoothness and the flowability of the aerogel microspheres are poor, and a large number of irregular honeycomb holes are formed after a subsequent drying process to form a structure formed by gathering a large number of irregular honeycomb holes, so that the aerogel microspheres are formedPreparation of the resulting SiO 2 The dry density and the heat conductivity coefficient of the aerogel-gypsum-based thermal insulation material are higher.
Meanwhile, the standard consistency extension degree is adopted for measurement, the water consumption of the standard consistency of the mixed sample is obtained, and the SiO is effectively ensured 2 The condensation time of the aerogel-gypsum-based heat-insulating material is beneficial to improving SiO 2 Quality of aerogel-gypsum based insulation.
An SiO 2 The preparation method of the aerogel-gypsum-based heat insulation material is characterized in that a 200-mesh screen is adopted for sieving in the step one. The gypsum powder obtained by filtering with a 200-mesh screen has fine granularity and is beneficial to SiO 2 The full dispersion of the aerogel and the influence of moisture and caking on the raw material on SiO are avoided 2 Quality of aerogel-gypsum based insulation.
An SiO 2 The preparation method of the aerogel-gypsum-based heat insulation material is characterized in that the drying in the fourth step is drying for 18-24 hours at 50-55 ℃ to constant weight. Generally, the judgment criteria for constant weight are: and continuously drying and weighing the slurry coagulated body after re-curing, wherein the interval between two times of weighing is more than 4 hours until the mass difference between two adjacent times of weighing is not more than 1g.
In addition, the invention also discloses SiO 2 The aerogel-gypsum-based thermal insulation material is characterized by being prepared by the method.
Compared with the prior art, the invention has the following advantages:
1. the invention uses building gypsum and SiO 2 Preparation of SiO by blending aerogel as raw material with water 2 Aerogel-gypsum based insulation material to make SiO 2 The aerogel is uniformly dispersed in the building gypsum, the heat insulation performance of the material is enhanced, the specific gravity of the material is reduced, the process is simple, foaming is not needed, and other additional or modified materials are not needed.
2. The invention mixes the gypsum powder and SiO 2 Uniformly mixing aerogel to form a large amount of evenly distributed aerogel microspheres, adding water to gaps of the aerogel microspheres or gypsum powder attached to the surface of the aerogel microspheres for hydration to form gypsum slurry wrapped in the aerogelThe surface of the microsphere forms a structure formed by gathering a large number of regular honeycomb holes after being dried, so that SiO 2 The dry density and the heat conductivity coefficient of the aerogel-gypsum-based heat insulation material are lower, and the service performance of the heat insulation material is improved.
3. The invention researches SiO 2 The influence of the aerogel mixing amount on the water consumption, the condensation time, the strength and the heat conductivity coefficient of the gypsum-based heat-insulating material with the standard consistency is explored 2 The function rule of the aerogel-gypsum-based heat-insulating material is regulated, and SiO with optimal performance is obtained 2 And (4) optimally mixing the aerogel.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
FIG. 1 is an XRD pattern of the architectural gypsum used in examples 1 to 7 of the present invention and comparative example 1.
Detailed Description
The phases of the building gypsum used in examples 1 to 7 and comparative example 1 of the present invention are calcium sulfate hemihydrate, siO 2 The aerogels are all heat-insulating dispersion type SiO 2 Aerogel paste, siO 2 The aerogel is uniformly dispersed in the building gypsum without aggregation and caking.
The concrete process of measuring the standard consistency spread of the mixed sample in the embodiments 1 to 7 and the comparative example 1 of the invention to further obtain the water consumption of the standard consistency of the mixed sample refers to a standard consistency spread measuring method in GB/T17669.3-1999 determination of mechanical properties of building gypsum, and the concrete process is as follows: wiping the inside of the cylinder of the consistometer and the glass plate, keeping the cylinder wet, and vertically placing the cylinder of the consistometer on the glass plate; pouring water with the estimated water consumption of the standard consistency into a stirring bowl, weighing 300g of a mixed sample, pouring into the water in the stirring bowl within 5s, and stirring for 30s by using a stirring rod to obtain uniform slurry; the slurry is stirred and quickly injected into a cylinder of a consistometer, overflowed slurry is scraped by a scraper to enable the slurry surface to be flush with the upper end surface of the cylinder, a cylinder lifting button of the consistometer is started when a mixed sample is contacted with water for 50s, after the cylinder is lifted, the expansion diameters of test cakes formed by slurry diffusion in two vertical directions are measured, the arithmetic mean value of the expansion diameters is calculated, the water addition amount when the slurry expansion diameter is (180 +/-5) mm is recorded, the ratio (expressed by percentage) of the water addition amount to the mass of the mixed sample is calculated, and the mean value of the two measurement results is taken as the standard consistomy water consumption of the mixed sample and is accurate to 1%.
Example 1
The embodiment comprises the following steps:
firstly, screening the building gypsum through a 200-mesh screen to obtain gypsum powder;
step two, sampling 294g and 6g of SiO from the gypsum powder obtained in the step one 2 Mixing aerogel to obtain mixed sample, and mixing building gypsum and SiO corresponding to gypsum powder 2 Taking the total mass of the aerogel as a reference, and mixing SiO in the sample 2 The doping mass percentage of the aerogel is 2%, and then the standard consistency extension degree of the mixed sample is measured, so that the water consumption of the obtained standard consistency of the mixed sample is 67%;
step three, mixing 8820g of gypsum powder obtained in the step one and 180g of SiO 2 Uniformly mixing the aerogel to obtain a mixture, then weighing 6030g of water according to the water consumption of the standard consistency of the mixed sample obtained in the step two, and uniformly mixing the water with the mixture to prepare slurry;
pouring the slurry obtained in the third step into a mold with the size of 300mm multiplied by 30mm (length multiplied by width multiplied by height) and the bottom of which is paved with polyethylene plastic cloth, trowelling the upper surface, curing to final set, demolding, curing to age at room temperature of 25 +/-2 ℃, placing in an oven with the temperature of 50-55 ℃ and drying for 18-24 h to constant weight to obtain SiO 2 Aerogel-gypsum based insulation.
Comparative example 1
The comparative example differs from example 1 in that: siO in the slurry 2 The aerogel incorporation mass percentage was 0%.
Example 2
The embodiment comprises the following steps:
firstly, screening the building gypsum through a 200-mesh screen to obtain gypsum powder;
step two, from294g and 6g of SiO are sampled from the gypsum powder obtained in the step one 2 Uniformly mixing the aerogel to obtain a mixed sample, and mixing the building gypsum and the SiO corresponding to the gypsum powder 2 Taking the total mass of the aerogel as a reference, and mixing SiO in the sample 2 The doping mass percentage of the aerogel is 2%, and then the standard consistency extension degree of the mixed sample is measured, so that the water consumption of the standard consistency of the obtained mixed sample is 67%;
step three, weighing 6030g of water and 180g of SiO according to the water consumption for the standard consistency of the mixed sample obtained in the step two 2 Stirring and uniformly mixing aerogel to obtain a mixture, adding 8820g of gypsum powder obtained in the step one, and stirring and uniformly mixing to prepare slurry;
step four, pouring the slurry obtained in the step three into a mold with the size of 300mm multiplied by 30mm (length multiplied by width multiplied by height) and the bottom spread with polyethylene plastic cloth, troweling the upper surface, demolding after curing to final setting, then curing to age at room temperature of 25 +/-2 ℃, and placing in a baking oven with the temperature of 50-55 ℃ for drying for 18-24 h to constant weight to obtain SiO 2 Aerogel-gypsum based insulation.
The SiO prepared in examples 1 and 2 was measured by the hot plate method of GB/T10294-2008 "method for measuring thermal insulation Material Stable thermal resistance and related characteristics 2 The aerogel-gypsum-based insulation material was subjected to thermal conductivity measurement and dry density measurement at the same time, and the results are shown in table 1.
TABLE 1
As can be seen from Table 1, the SiO prepared in example 1 2 The dry density and the thermal conductivity coefficient of the aerogel-gypsum-based thermal insulation material are lower than those of the aerogel-gypsum-based thermal insulation material in example 2, the aerogel-gypsum-based thermal insulation material has more excellent performance and is more suitable for serving as a thermal insulation material, and the embodiment 1 shows that gypsum powder and SiO are adopted 2 The order of addition of water after mixing the aerogels is superior to the SiO addition in example 2 2 Adding the gypsum powder after the aerogel and the water are mixed evenly.
According to the charging sequence of example 1, adoptWith different SiO 2 Aerogel doping amount examples 2 to 7 were carried out to prepare SiO 2 Aerogel-gypsum-based insulation; at the same time, different SiO were tested 2 Aerogel doping amount (5-50%) water consumption for preparing the slurry with the standard consistency, under the condition of meeting the water consumption for the standard consistency, the initial setting time and the final setting time of the slurries prepared in examples 1-7 and comparative example 1 are measured by using a Vicat instrument, and the adopted parameters and the detection results are specifically shown in Table 2.
TABLE 2
As can be seen from Table 2, following SiO 2 The doping mass percentage of the aerogel is increased (0 to 50 percent), and SiO 2 The water consumption for the standard consistency adopted by the aerogel-gypsum-based heat-insulating material is reduced; meanwhile, the change rule of the initial setting time and the final setting time of the corresponding clean slurry is kept consistent, namely in SiO 2 The aerogel presents an increasing trend when the doping mass percentage is 0-5%, and presents a decreasing trend after decreasing when the doping mass percentage is more than 5% and less than 20%, wherein the doping mass percentage is 10% minimum, 20-30% presents a decreasing trend, and the doping mass percentage is continuously increased when the doping mass percentage is more than 30%.
The SiO prepared in examples 1 to 7 and comparative example 1 were subjected to the hot plate method of GB/T10294-2008 "method for measuring thermal insulation Material Stable State thermal resistance and related characteristics 2 The thermal conductivity of the aerogel-gypsum based insulation material was tested, and the dry mass and dry density were tested simultaneously, with the results shown in table 3.
TABLE 3
As can be seen from Table 3, with SiO 2 The doping mass percentage of the aerogel is increased (0 to 50 percent),SiO 2 the dry mass and dry density of the aerogel-gypsum-based insulation are significantly reduced, and the thermal conductivity is also reduced, as is SiO in example 7 2 When the aerogel was incorporated in a mass percentage of up to 50%, siO was added in comparison with comparative example 1 2 The dry mass weight of the aerogel-gypsum-based thermal insulation material is reduced to 70.26 percent, the thermal conductivity coefficient is reduced by 72.44 percent and is 0.08032W/(m.K), and the thermal insulation performance is best, which indicates that SiO is the best 2 Incorporation of aerogel in percent by weight on SiO 2 The dry density and the heat conductivity coefficient of the aerogel-gypsum-based heat insulation material have great influence; however, it should be noted that the setting time in example 7 is longer (Table 2, final setting time > 60 min), if SiO is further increased 2 The aerogel with the mass percent of the aerogel is mixed, the setting time is too long, and the practical application value is lost, so that SiO is mixed 2 The doping mass percentage of the aerogel is controlled to be not more than 50 percent.
The SiO prepared in examples 1 to 7 and comparative example 1 were treated in accordance with GB/T17669.3-1999 determination of mechanical Properties of building Gypsum 2 The mechanical properties of the aerogel-gypsum-based thermal insulation material were measured, and the results are shown in table 4.
TABLE 4
The "-" in Table 4 indicates that the intensity was too low to measure the value.
As can be seen from Table 4, with SiO 2 Increase in aerogel incorporation mass percentage, siO 2 The compressive strength (2h, 7d) and the flexural strength (2h, 7d) of the aerogel-gypsum-based insulation material both tend to decrease as a whole, and with the increase of the curing age, siO 2 The compressive strength and the flexural strength of the aerogel-gypsum-based thermal insulation material are both increased.
The comprehensive analysis of tables 2 to 4 shows that when SiO is generated 2 Incorporation of aerogelsWhen the amount percentage is 40 percent, the prepared SiO 2 The aerogel-gypsum-based thermal insulation material has optimal setting time, dry density, thermal conductivity coefficient and mechanical property, and is suitable for practical application.
FIG. 1 is an XRD pattern of the construction gypsum used in examples 1 to 7 of the present invention and comparative example 1, and as can be seen from FIG. 1, the strongest diffraction peak near 2 θ =14.76 °, and the second and third strongest diffraction peak corresponding to 2 θ at 29.76 ° and 25.69 °, respectively, are hemihydrate gypsum (Bassanite, caSO) 4 ˙0.5H 2 O) diffraction peaks; and the diffraction peaks of the hemihydrate gypsum also appear near 27.93 degrees, 31.91 degrees, 33.00 degrees, 42.29 degrees, 49.40 degrees, 54.14 degrees, 55.13 degrees and the like of 2 theta respectively; the diffraction peak with lower intensity, which appears when the 2 theta is around 26.63 degrees, is Quartz (Quartz, siO) 2 ) Peaks indicate that the main phase of the building gypsum is hemihydrate gypsum, which also has a low content of quartz, and the content of hemihydrate gypsum is up to 96.8% and the content of quartz is only 3.2% as determined by analysis.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (7)
1. SiO (silicon dioxide) 2 The preparation method of the aerogel-gypsum-based heat insulation material is characterized by comprising building gypsum and SiO 2 Prepared by blending aerogel and water, and is prepared by mixing building gypsum and SiO 2 SiO based on the total mass of aerogel 2 The doping mass percentage of the aerogel is 2-50%;
the method comprises the following steps:
step one, sieving building gypsum to obtain gypsum powder;
step two, sampling the gypsum powder obtained in the step one and mixing the gypsum powder with SiO 2 Uniformly mixing the aerogels to obtain a mixed sample, and then measuring the standard consistency expansion degree of the mixed sample to obtain the water consumption of the standard consistency of the mixed sample;
step three, mixing the gypsum powder obtained in the step one with SiO 2 Uniformly mixing the aerogel to obtain a mixture A, weighing water according to the standard consistency of the mixed sample obtained in the step two, and uniformly mixing the water with the mixture A to prepare slurry A;
or weighing water according to the standard consistency of the mixed sample obtained in the second step and mixing the water with SiO 2 Stirring and uniformly mixing aerogel to obtain a mixture B, then adding the gypsum powder obtained in the step one, and stirring and uniformly mixing to prepare slurry B;
and building gypsum and SiO 2 Taking the total mass of the aerogel as a reference, and taking SiO in the slurry A and the slurry B as the reference 2 Aerogel doping mass percent and SiO in the step two mixed sample 2 The doping mass percentage of the aerogel is the same;
pouring the slurry A or the slurry B obtained in the step three into a mold, demolding after curing, curing to an age, and drying to obtain SiO 2 Aerogel-gypsum based insulation.
2. An SiO as claimed in claim 1 2 The preparation method of the aerogel-gypsum-based heat insulation material is characterized in that the phase of the building gypsum is calcium sulfate hemihydrate.
3. An SiO as claimed in claim 1 2 The preparation method of the aerogel-gypsum-based thermal insulation material is characterized in that the SiO 2 The aerogel is heat-insulating dispersed SiO 2 Aerogel paste.
4. An SiO as claimed in claim 1 2 The preparation method of the aerogel-gypsum-based thermal insulation material is characterized in that the SiO 2 The aerogel is uniformly dispersed in the building gypsum without aggregation and agglomeration.
5. An SiO as claimed in claim 1 2 The preparation method of the aerogel-gypsum-based heat insulation material is characterized in that a 200-mesh screen is adopted for sieving in the step one.
6. An SiO as claimed in claim 1 2 The preparation method of the aerogel-gypsum-based heat insulation material is characterized in that the drying in the fourth step is drying for 18-24 hours at 50-55 ℃ to constant weight.
7. SiO (silicon dioxide) 2 Aerogel-gypsum based insulation, characterized in that it is obtained by the process according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110841633.5A CN113461404B (en) | 2021-07-26 | 2021-07-26 | SiO (silicon dioxide) 2 Aerogel-gypsum-based thermal insulation material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110841633.5A CN113461404B (en) | 2021-07-26 | 2021-07-26 | SiO (silicon dioxide) 2 Aerogel-gypsum-based thermal insulation material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113461404A CN113461404A (en) | 2021-10-01 |
| CN113461404B true CN113461404B (en) | 2023-03-24 |
Family
ID=77882436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110841633.5A Active CN113461404B (en) | 2021-07-26 | 2021-07-26 | SiO (silicon dioxide) 2 Aerogel-gypsum-based thermal insulation material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113461404B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276103B (en) * | 2021-11-17 | 2022-11-18 | 北新集团建材股份有限公司 | Heat-preservation and heat-insulation paper-surface gypsum board and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014204149A1 (en) * | 2013-06-20 | 2014-12-24 | 주식회사 지오스에어로젤 | Lightweight gypsum board containing aerogel slurry, and preparation method therefor |
| CN106630893A (en) * | 2016-12-01 | 2017-05-10 | 湖北硅金凝节能减排科技有限公司 | Aerogel thermal-insulation board and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013043882A1 (en) * | 2011-09-23 | 2013-03-28 | Georgia-Pacific Gypsum Llc | Low thermal transmission building material |
| CN104496399B (en) * | 2014-12-15 | 2016-04-20 | 苏州同玄新材料有限公司 | A kind of aerogel building heat preservation heat-insulation composite material and preparation method thereof |
| CN106747189B (en) * | 2016-12-07 | 2019-09-06 | 苏州同玄新材料有限公司 | Gypsum material of aerogel-congtg and preparation method thereof |
| CN108863260A (en) * | 2017-05-11 | 2018-11-23 | 北新集团建材股份有限公司 | A kind of lightweight Thistle board and preparation method thereof |
| CN109851292A (en) * | 2017-11-30 | 2019-06-07 | 天津城建大学 | A kind of high-performance aeroge thermal insulation mortar and preparation method thereof |
-
2021
- 2021-07-26 CN CN202110841633.5A patent/CN113461404B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014204149A1 (en) * | 2013-06-20 | 2014-12-24 | 주식회사 지오스에어로젤 | Lightweight gypsum board containing aerogel slurry, and preparation method therefor |
| CN106630893A (en) * | 2016-12-01 | 2017-05-10 | 湖北硅金凝节能减排科技有限公司 | Aerogel thermal-insulation board and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113461404A (en) | 2021-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103664114B (en) | Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof | |
| CN103641393B (en) | A kind of steam-pressing aero-concrete heat insulation building block utilizing Yellow River Sand to prepare and preparation method thereof | |
| CN102417340B (en) | Gypsum-based phase change energy storage polymer insulation mortar and preparation method thereof | |
| WO2020253883A1 (en) | Gypsum-based self-leveling floor and manufacturing method therefor | |
| CN102249614B (en) | Light thermal insulation soundproof damping floor mortar | |
| CN109942267A (en) | A kind of gypsum base composite light thermal insulation mortar and preparation method thereof | |
| CN101880149A (en) | Phase-change and energy-storage desulfurized gypsum interior wall thermal-insulation mortar | |
| CN101759416A (en) | Thermal insulation building mortar and preparation process thereof | |
| CN109694228A (en) | A kind of gypsum based self-leveling mortar and preparation method thereof and gypsum based self-leveling slurry | |
| CN103223751A (en) | Heat-insulation flexible face brick and making method thereof | |
| CN103467057B (en) | Moistureproof gypsum block of a kind of self-heat conserving and preparation method thereof | |
| CN102010166A (en) | Method for preparing micro expanded inorganic heat insulation mortar | |
| CN109467360A (en) | A kind of submicro inorganic whisker reinforcement aerogel foam concrete and preparation method thereof | |
| CN104556942B (en) | A kind of thermal-insulating anti-flaming building material and preparation method thereof | |
| CN108751900B (en) | High-performance reflective heat-insulation gypsum-based composite heat-insulation material and preparation method thereof | |
| CN113461404B (en) | SiO (silicon dioxide) 2 Aerogel-gypsum-based thermal insulation material and preparation method thereof | |
| CN1238296C (en) | Polystyrene foam particle heat insulation mortar | |
| CN101560081A (en) | Preparation method of exterior wall bonding powder polystyrene granule insulating mortar | |
| CN104829179B (en) | White glass bead modification heat-insulating masonry mortar and using method | |
| CN101653966B (en) | Method for preparing special plastering mortar for self-energy-saving air-entrained concrete wall material | |
| CN112897974A (en) | Heat-insulating plastering for inner wall | |
| CN107793088A (en) | Lightweight anti-cracking heat insulation mortar | |
| CN104402377A (en) | Plastering gypsum special for autoclaved aerated concrete products | |
| CN112479639B (en) | Low-shrinkage vitrified micro-bead thermal insulation mortar and preparation method thereof | |
| CN108285308A (en) | A kind of thermal insulation mortar, heat insulation layer structure and heat preserving exterior wall body structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |