CN114276084A - Heat-insulating ceramsite wallboard - Google Patents
Heat-insulating ceramsite wallboard Download PDFInfo
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Abstract
The application belongs to the technical field of wallboards, and particularly relates to a heat-insulating ceramsite wallboard which comprises the following components in parts by weight: 300 parts of cement, 50-100 parts of fly ash, 340 parts of sand, 230 parts of modified ceramsite, 1-2 parts of admixture and 70-120 parts of water. The application provides a thermal-insulated haydite wallboard further improves the heat preservation and heat-proof properties of haydite through modifying the haydite to improve the cohesion between haydite and the gel material, promote the intensity of wallboard, thereby obtain intensity higher, the haydite wallboard that the thermal-insulated effect of heat preservation is better.
Description
Technical Field
The application belongs to the technical field of the wallboard, concretely relates to thermal-insulated haydite wallboard.
Background
The ceramsite is artificial lightweight aggregate obtained by high-temperature roasting, has a spherical shape, is hard on the outside, has fine air holes inside, has good heat insulation performance, low apparent density, high specific strength, low heat conductivity, good durability, good chemical resistance and excellent fire resistance, and is widely applied to wallboard manufacturing.
Chinese patent application document CN 108341637A discloses an assembled inner partition board with light ceramsite as aggregate, which comprises a gel material, a coarse aggregate, a fine aggregate, an additive and water, wherein the gel material comprises 23-24 parts of cement and 10 parts of fly ash, the coarse aggregate comprises 29-30 parts of light ceramsite, the fine aggregate comprises 5 parts of ceramic sand, and the additive comprises 0.1 part of water. The prepared assembled inner partition board can reduce the weight of the assembled inner partition board and improve the heat preservation and insulation performance.
Although the weight of the wallboard can be reduced and the heat insulation performance of the wallboard can be improved by simply adding the light ceramsite, the improvement degree is always limited, and a more intensive research on how to further improve the heat insulation performance of the wallboard is needed on the basis of the prior art so as to meet the increasingly high market expectation.
Disclosure of Invention
In order to solve the problems, the application discloses a heat-insulation ceramsite wallboard, which further improves the heat-insulation performance of ceramsite by modifying the ceramsite, improves the binding force between the ceramsite and a gel material, and improves the strength of the wallboard, so that the ceramsite wallboard with higher strength and better heat-insulation effect is obtained.
The application provides a thermal-insulated haydite wallboard adopts following technical scheme:
a heat-insulating ceramsite wallboard comprises the following components in parts by weight:
cement 200 portions and 300 portions
50-100 parts of fly ash
240 portions of sand
230 portions of modified ceramsite
1-2 parts of additive
70-120 parts of water.
Optionally, the preparation method of the modified ceramsite comprises the following steps:
(1) adding ceramsite into an aqueous solution of hexadecyl trimethyl ammonium bromide, and carrying out ultrasonic oscillation for 1-2 h to obtain a solution A;
(2) adding periclase powder into the solution A, and continuing ultrasonic oscillation for 40-60 min to obtain solution B;
(3) adding the ethyl orthosilicate ethanol solution into the solution B, uniformly mixing to obtain a solution C, adding diethanolamine into the solution C, continuing ultrasonic oscillation for 1-2 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
In the process of modifying the ceramsite, the surface of the ceramsite is activated by cetyl trimethyl ammonium bromide to enable the surface of the ceramsite to adsorb periclase powder, and finally a silicon dioxide layer is formed on the outer side of the ceramsite through tetraethoxysilane. The cetyl trimethyl ammonium bromide not only can activate the ceramsite, but also can be used as a template in the process of preparing the silicon dioxide, and helps to control the morphology and the particle size of the silicon dioxide. The periclase powder expands after hydration, and an expansion layer can be formed on the outer side of the ceramsite, so that the heat preservation and insulation effect of the ceramsite can be further improved, the contraction generated in the drying process of the wallboard can be effectively resisted, and the generation of cracks can be reduced. The silica on the outermost side is beneficial to guiding the hydration products of the gel substances to be dissociated to the surface of the ceramsite and improving the bonding effect between the ceramsite and the gel substances, and the silica can also generate a volcanic ash reaction with calcium hydroxide generated by cement hydration to generate hydrated calcium silicate and improve the strength of the wallboard.
Optionally, in the aqueous solution of cetyltrimethylammonium bromide, the mass percentage concentration of cetyltrimethylammonium bromide is 1-2%.
The inventor finds in experiments that the modified ceramsite prepared by adopting the aqueous solution of the cetyl trimethyl ammonium bromide with the mass percentage concentration is beneficial to obtaining higher wallboard strength and heat insulation effect after being applied to the ceramsite wallboard.
Optionally, the mass ratio of the ceramsite to the periclase powder to the tetraethoxysilane is 1:0.6-0.8: 0.3-0.4.
The inventor finds in experiments that the modified ceramsite prepared by adopting the ceramsite, the periclase powder and the tetraethoxysilane in the mass ratio is beneficial to obtaining higher wallboard strength and heat insulation effect after being applied to the ceramsite wallboard.
Optionally, the ceramsite is 5-20mm ceramsite continuous gradation.
Optionally, the heat-insulating ceramsite wall board further comprises carboxymethyl cellulose.
The addition of the carboxymethyl cellulose is beneficial to improving the binding force among all the components and improving the tensile strength of the wallboard, and in addition, the carboxymethyl cellulose can be combined with silicon dioxide hydrogen bonds on the surface of the ceramsite, so that the improvement of the overall strength is facilitated.
Optionally, the carboxymethyl cellulose is 3 to 5 parts by weight.
Optionally, the additive is calcium lignosulfonate.
Optionally, the sand is ceramic sand with a particle size of less than 5 mm.
Optionally, the heat-insulating ceramsite wallboard is prepared by the following method:
(1) weighing the components in proportion, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
The application has the following beneficial effects:
(1) the application provides a thermal-insulated haydite wallboard further improves the heat preservation and heat-proof properties of haydite through modifying the haydite to improve the cohesion between haydite and the gel material, promote the intensity of wallboard, thereby obtain intensity higher, the haydite wallboard that the thermal-insulated effect of heat preservation is better.
(2) When the modified ceramsite is prepared, the surface of the ceramsite is activated by cetyl trimethyl ammonium bromide to enable the surface of the ceramsite to adsorb periclase powder, and finally a silicon dioxide layer is formed on the outer side of the ceramsite through tetraethoxysilane. The cetyl trimethyl ammonium bromide not only can activate the ceramsite, but also can be used as a template in the process of preparing the silicon dioxide, and helps to control the morphology and the particle size of the silicon dioxide. The periclase powder expands after hydration, and an expansion layer can be formed on the outer side of the ceramsite, so that the heat preservation and insulation effect of the ceramsite can be further improved, the contraction generated in the drying process of the wallboard can be effectively resisted, and the generation of cracks can be reduced. The silica on the outermost side is beneficial to guiding the hydration products of the gel substances to be dissociated to the surface of the ceramsite and improving the bonding effect between the ceramsite and the gel substances, and the silica can also generate a volcanic ash reaction with calcium hydroxide generated by cement hydration to generate hydrated calcium silicate and improve the strength of the wallboard.
(3) The addition of the carboxymethyl cellulose is beneficial to improving the binding force among all the components and improving the tensile strength of the wallboard, and in addition, the carboxymethyl cellulose can be combined with silicon dioxide hydrogen bonds on the surface of the ceramsite, so that the improvement of the overall strength is facilitated.
Detailed Description
The present application will now be described in further detail with reference to examples.
The cement used in the examples and comparative examples of the present application was 42.5R portland cement; the fly ash is II-grade fly ash; the sand is ceramic sand with the particle size less than 5 mm; the ceramsite used for modifying the ceramsite is 5-20mm particle size continuous gradation ceramsite, and the additive is calcium lignosulphonate.
Example 1
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1% by mass of aqueous solution of hexadecyl trimethyl ammonium bromide to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 2h to obtain solution A;
(2) adding 60 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 40 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (40 kg of ethyl orthosilicate and 80 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 60 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 200 kg of cement, 50 kg of fly ash, 240 kg of ceramic sand, 230 kg of modified ceramsite, 1 kg of calcium lignosulfonate, 70 kg of water and 3 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Example 2
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into an aqueous solution of hexadecyl trimethyl ammonium bromide with the mass percentage concentration of 2% to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1h to obtain a solution A;
(2) adding 80 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 60 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (30 kg of ethyl orthosilicate and 60 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 40 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 2 hours, standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 300 kg of cement, 100 kg of fly ash, 340 kg of ceramic sand, 330 kg of modified ceramsite, 2 kg of calcium lignosulfonate, 120 kg of water and 5 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Example 3
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 70 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 50 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (wherein 35 kg of ethyl orthosilicate and 70 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 50 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1.5 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Example 4
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 70 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 50 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (wherein 35 kg of ethyl orthosilicate and 70 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 50 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1.5 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulphonate and 95 kg of water, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 1
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 0.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 70 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 50 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (wherein 35 kg of ethyl orthosilicate and 70 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 50 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1.5 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 2
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 50 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 50 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (wherein 35 kg of ethyl orthosilicate and 70 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 50 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1.5 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 3
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 70 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 50 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (wherein 20 kg of ethyl orthosilicate and 70 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 50 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1.5 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 4
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding an ethanol solution of ethyl orthosilicate (wherein 35 kg of ethyl orthosilicate and 70 kg of ethanol) into the solution A, uniformly mixing to obtain a solution C, adding 50 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1.5 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 5
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 70 kg of periclase powder into the solution A, continuing to perform ultrasonic oscillation for 50 min, standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 6
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into water to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 70 kg of periclase powder into the solution A, and continuing ultrasonic oscillation for 50 min to obtain a solution B;
(3) adding an ethanol solution of ethyl orthosilicate (wherein 35 kg of ethyl orthosilicate and 70 kg of ethanol) into the solution B, uniformly mixing to obtain a solution C, adding 50 kg of diethanolamine into the solution C, continuing ultrasonic oscillation for 1.5 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 7
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of unmodified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Comparative example 8
The preparation method of the modified ceramsite comprises the following steps:
(1) adding 100 kg of ceramsite into 1.5 percent of hexadecyl trimethyl ammonium bromide aqueous solution by mass percent to ensure that the liquid level is at least 10 mm higher than the ceramsite, and carrying out ultrasonic oscillation for 1.5 h to obtain a solution A;
(2) adding 70 kg of periclase powder into the solution A, continuing ultrasonic oscillation for 50 min, filtering, separating, washing and drying to obtain primary modified ceramsite;
(3) and uniformly mixing 35 kg of silicon dioxide with the primary modified ceramsite to obtain the modified ceramsite.
Preparing a heat-insulating ceramsite wallboard:
(1) respectively weighing 250 kg of cement, 75 kg of fly ash, 290 kg of ceramic sand, 280 kg of modified ceramsite, 1.5 kg of calcium lignosulfonate, 95 kg of water and 4 kg of carboxymethyl cellulose, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
The performance tests were performed on the thermally insulated ceramsite wall panels prepared in examples 1-4 and comparative examples 1-8, and the test results are shown in table 1.
TABLE 1
| Test items | Coefficient of thermal conductivity (W/m. K) | Compressive strength (MPa) | Tensile strength (MPa) | Dry density (kg/m)3) | Dry shrinkage value (mm/m) |
| Example 1 | 0.096 | 51.3 | 4.1 | 1820 | 0.076 |
| Example 2 | 0.073 | 46.5 | 4.6 | 1831 | 0.024 |
| Example 3 | 0.085 | 49.7 | 4.4 | 1836 | 0.053 |
| Example 4 | 0.089 | 53.4 | 3.5 | 1832 | 0.059 |
| Comparative example 1 | 0.093 | 50.8 | 4.4 | 1838 | 0.126 |
| Comparative example 2 | 0.098 | 51.1 | 4.5 | 1843 | 0.215 |
| Comparative example 3 | 0.084 | 45.6 | 3.7 | 1827 | 0.055 |
| Comparative example 4 | 0.132 | 54.3 | 4.6 | 1850 | 0.743 |
| Comparative example 5 | 0.081 | 41.7 | 3.1 | 1839 | 0.048 |
| Comparative example 6 | 0.105 | 52.5 | 4.5 | 1841 | 0.197 |
| Comparative example 7 | 0.187 | 37.6 | 2.7 | 1848 | 0.796 |
| Comparative example 8 | 0.086 | 43.4 | 4.2 | 1835 | 0.055 |
As can be seen from Table 1, the thermal conductivity of the thermal insulation ceramsite wall boards prepared in examples 1 to 4 is below 0.096W/m.K, and the thermal insulation ceramsite wall boards have good thermal insulation performance, the compressive strength is 46.5-51.4 MPa, the compressive strength is good, the dry shrinkage value is below 0.076 mm/m, the thermal insulation ceramsite wall boards have good dry shrinkage resistance, and the generation of dry shrinkage cracks can be effectively reduced.
It can be seen from example 4 that when carboxymethyl cellulose is not added in example 4, the tensile strength is reduced significantly although the compressive strength is slightly increased, probably because the addition of carboxymethyl cellulose increases the bonding ability between the components and can hydrogen bond with silica, resulting in a reduction in tensile strength after removal.
It can be seen from comparative example 1 that when the concentration of the aqueous solution of cetyltrimethylammonium bromide used in the preparation of modified ceramsite in comparative example 1 is reduced to 0.5%, the thermal conductivity is increased, and the dry shrinkage value is increased significantly, which may be due to the fact that the reduction of the concentration of the aqueous solution of cetyltrimethylammonium bromide weakens the activation effect on the surface of the ceramsite, and reduces the amount of periclase powder adsorbed on the surface of the ceramsite, thereby reducing the swelling effect and failing to provide a good compensation effect on the shrinkage occurring during the drying process.
It can be seen from comparative example 2 that when the amount of the periclase powder used for preparing the modified ceramsite in comparative example 2 is reduced, the thermal conductivity coefficient is further increased, and the dry shrinkage value is further increased, which may be caused by that the decrease of the addition amount of the periclase powder in the modification process directly causes the decrease of the periclase powder adsorbed on the surface of the ceramsite, so that the expansion is reduced, the heat insulation effect is reduced, and the shrinkage in the drying process cannot be well compensated.
It can be seen from comparative example 3 that when the quantity of tetraethoxysilane used to prepare the modified ceramsite in comparative example 3 is reduced, the strength of the wallboard prepared is significantly reduced, probably because the silica content of the outside of the ceramsite adsorbing the periclase powder is reduced, which results in a reduced aggregation of the hydration products of the gel material and is not conducive to more pozzolanic reactions to form calcium silicate hydrate which is favorable for strength.
From comparative example 4, it can be seen that, when step (2) is not performed in the process of preparing the modified ceramsite in comparative example 4, that is, the periclase powder is not added, the thermal conductivity and the dry shrinkage value are both significantly increased, which may be due to the loss of the expansion effect of the periclase powder, which leads to the reduction of the thermal insulation effect, and the drying shrinkage cannot be compensated by the expansion of the periclase powder.
It can be seen from comparative example 5 that, when step (3) is not performed in the process of preparing the modified ceramsite in comparative example 5, i.e. the ethanol solution of tetraethoxysilane and diethanol amine are not added, the compressive strength and the tensile strength are both obviously reduced, which may be that the hydrated product of the gel substance cannot be aggregated because the outside of the ceramsite adsorbing the periclase powder is not coated with silica, which is not favorable for the interface bonding between the modified ceramsite and the gel substance, and is not favorable for more pozzolanic reaction to generate hydrated calcium silicate favorable for strength.
It can be seen from comparative example 6 that, when water is used instead of the cetyl trimethyl ammonium bromide aqueous solution in the step (1) of preparing the modified ceramsite in comparative example 6, the thermal conductivity and the dry shrinkage both increase significantly, which is probably because the cetyl trimethyl ammonium bromide not added can not perform a good activation function on the surface of the ceramsite and can not adsorb more periclase powder on the surface of the ceramsite, thereby reducing the expansion effect, reducing the heat insulation effect, and being incapable of performing a good compensation function on the shrinkage generated in the drying process.
It can be seen from comparative example 7 that, when the ceramsite is not modified in comparative example 7 and the unmodified ceramsite is used in the ceramsite wallboard, the thermal conductivity and the dry shrinkage value are both significantly increased, and the tensile strength and the compressive strength are both significantly decreased, which may be that the thermal insulation performance is deteriorated due to the loss of the expansion effect because no periclase powder is provided, the shrinkage caused by drying cannot be compensated, and the hydration product of the gel substance cannot be aggregated because no silica is coated on the outside of the ceramsite, which is not beneficial to the interface bonding between the modified ceramsite and the gel substance, and is not beneficial to the generation of more pozzolanic reaction to generate hydrated calcium silicate which is beneficial to strength.
It can be seen from comparative example 8 that, when the silica coated on the surface of the ceramic particle adsorbed with the periclase powder is not generated by the tetraethoxysilane in the comparative example 8, but the silica is directly mixed with the ceramic particle adsorbed with the periclase powder, the compressive strength and the flexural strength are both obviously reduced, which is probably because the silica is not coated on the surface of the ceramic particle, the binding force between the ceramic particle and the gel substance cannot be improved, and the tensile strength and the compressive strength are both reduced.
The present embodiment is merely illustrative and not restrictive, and various changes and modifications may be made by persons skilled in the art without departing from the scope of the present invention as defined in the appended claims. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A heat insulation ceramsite wallboard is characterized in that: the paint comprises the following components in parts by weight:
cement 200 portions and 300 portions
50-100 parts of fly ash
240 portions of sand
230 portions of modified ceramsite
1-2 parts of additive
70-120 parts of water.
2. The insulated ceramsite wall panel of claim 1, wherein: the preparation method of the modified ceramsite comprises the following steps:
(1) adding ceramsite into an aqueous solution of hexadecyl trimethyl ammonium bromide, and carrying out ultrasonic oscillation for 1-2 h to obtain a solution A;
(2) adding periclase powder into the solution A, and continuing ultrasonic oscillation for 40-60 min to obtain solution B;
(3) adding the ethyl orthosilicate ethanol solution into the solution B, uniformly mixing to obtain a solution C, adding diethanolamine into the solution C, continuing ultrasonic oscillation for 1-2 h, then standing, filtering, separating, washing and drying to obtain the modified ceramsite.
3. The insulated ceramsite wall panel of claim 2, wherein: in the aqueous solution of the hexadecyl trimethyl ammonium bromide, the mass percentage concentration of the hexadecyl trimethyl ammonium bromide is 1-2%.
4. The insulated ceramsite wall panel of claim 2, wherein: the mass ratio of the ceramsite to the periclase powder to the tetraethoxysilane is 1:0.6-0.8: 0.3-0.4.
5. The insulated ceramsite wall panel of claim 2, wherein: the ceramsite is ceramsite continuous gradation with the particle size of 5-20 mm.
6. The insulated ceramsite wall panel of claim 1, wherein: the heat-insulating ceramsite wallboard also comprises carboxymethyl cellulose.
7. The insulated ceramsite wall panel of claim 6, wherein: the weight portion of the carboxymethyl cellulose is 3-5 portions.
8. The insulated ceramsite wall panel of claim 1, wherein: the additive is calcium lignosulphonate.
9. The insulated ceramsite wall panel of claim 1, wherein: the sand is ceramic sand with the particle size smaller than 5 mm.
10. The insulated ceramsite wall panel of claim 1, wherein: the preparation method comprises the following steps:
(1) weighing the components in proportion, and uniformly stirring and mixing the components to obtain concrete;
(2) pouring concrete into a wallboard mould, vibrating to compact, demoulding after forming, and maintaining to obtain the heat-insulating ceramsite wallboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111609542.5A CN114276084B (en) | 2021-12-27 | 2021-12-27 | Heat-insulating ceramsite wallboard |
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| CN115650643A (en) * | 2022-09-26 | 2023-01-31 | 江苏泰林建设有限公司 | Light self preservation temperature haydite board |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5054682A (en) * | 1973-07-18 | 1975-05-14 | ||
| KR20050076271A (en) * | 2004-01-20 | 2005-07-26 | 정길례 | An incombustible construction mineral material having coating surface, and the manufacturing method |
| CN103693873A (en) * | 2013-11-27 | 2014-04-02 | 中国建筑材料科学研究总院 | High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof |
| CN108341637A (en) * | 2018-03-15 | 2018-07-31 | 贵州中建建筑科研设计院有限公司 | It is a kind of using light ceramic as the assembled inner partition plate of aggregate |
| CN111825391A (en) * | 2020-07-07 | 2020-10-27 | 中建商品混凝土有限公司 | Light high-strength self-insulation concrete for prefabricated building |
| CN111960752A (en) * | 2020-08-19 | 2020-11-20 | 黄冈师范学院 | Phase-change heat storage wall material for building maintenance and preparation method thereof |
| CN113773006A (en) * | 2021-09-16 | 2021-12-10 | 中交公路长大桥建设国家工程研究中心有限公司 | Ultrahigh-strength lightweight concrete and preparation method thereof |
-
2021
- 2021-12-27 CN CN202111609542.5A patent/CN114276084B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5054682A (en) * | 1973-07-18 | 1975-05-14 | ||
| KR20050076271A (en) * | 2004-01-20 | 2005-07-26 | 정길례 | An incombustible construction mineral material having coating surface, and the manufacturing method |
| CN103693873A (en) * | 2013-11-27 | 2014-04-02 | 中国建筑材料科学研究总院 | High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof |
| CN108341637A (en) * | 2018-03-15 | 2018-07-31 | 贵州中建建筑科研设计院有限公司 | It is a kind of using light ceramic as the assembled inner partition plate of aggregate |
| CN111825391A (en) * | 2020-07-07 | 2020-10-27 | 中建商品混凝土有限公司 | Light high-strength self-insulation concrete for prefabricated building |
| CN111960752A (en) * | 2020-08-19 | 2020-11-20 | 黄冈师范学院 | Phase-change heat storage wall material for building maintenance and preparation method thereof |
| CN113773006A (en) * | 2021-09-16 | 2021-12-10 | 中交公路长大桥建设国家工程研究中心有限公司 | Ultrahigh-strength lightweight concrete and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张秀芳等: "《建筑砂浆技术解读470问》", 31 August 2009, 中国建材工业出版社 * |
| 李盛凯: "二氧化硅微球及纳米二氧化铈的制备与工艺研究", 《《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115650643A (en) * | 2022-09-26 | 2023-01-31 | 江苏泰林建设有限公司 | Light self preservation temperature haydite board |
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