CN109133981B - Gypsum-based plastering mortar - Google Patents
Gypsum-based plastering mortar Download PDFInfo
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- CN109133981B CN109133981B CN201710506460.5A CN201710506460A CN109133981B CN 109133981 B CN109133981 B CN 109133981B CN 201710506460 A CN201710506460 A CN 201710506460A CN 109133981 B CN109133981 B CN 109133981B
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- 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
- C04B28/142—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 containing synthetic or waste calcium sulfate cements
- C04B28/144—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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
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- 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
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- 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 gypsum-based plastering mortar comprises a gypsum-based plastering material and water, wherein the gypsum-based plastering material comprises 30-60% of low-quality desulfurized gypsum, 30-50% of phase change energy and heat storage material, 0-20% of cement, 0.1-0.8% of retarder, 0-4% of latex powder, 0.1-0.6% of water reducer, 0.1-0.5% of cellulose ether, 0-5% of fly ash and 0-30% of sand by taking the dry weight of the gypsum-based plastering material as 100%; the amount of water is measured according to the method prescribed in the relevant national standard. The gypsum-based plastering mortar takes the low-quality desulfurized gypsum with high impurity content as a raw material, realizes the resource utilization of the low-quality desulfurized gypsum, has good heat-insulating property, can be directly coated on the surface of a building wall or pasted on the surface of the building wall after being cast into a prefabricated plate by cast-in-place casting, forms a composite phase-change heat storage wall, and improves the heat storage capacity of the building envelope.
Description
Technical Field
The application relates to but is not limited to the technical field of novel building materials, in particular to but not limited to gypsum-based plastering mortar.
Background
The gypsum is a porous building material, is sensitive to air humidity and temperature, has good capacity of adjusting the environment humidity and temperature, and can load other functional materials in a porous structure. However, some flue gas desulfurization gypsum contains a certain amount of soluble impurities (such as sodium ions, magnesium ions and chloride ions), and the desulfurization gypsum with high impurity ion content has adverse effects on the performance of gypsum products, for example, a gypsum plasterboard prepared from the desulfurization gypsum with high impurity ion content is easy to have the problems of separation of a board core and a paper core, surface frost return and the like.
In recent years, many scientific research units in China have successively conducted research works on the preparation and application of functional gypsum-based plastering materials by using base materials such as natural gypsum and industrial by-product gypsum (desulfurized gypsum, phosphogypsum, fluorgypsum and the like), but there are few reports on the research on the preparation of heat-insulating materials with excellent heat-insulating performance by using low-quality desulfurized gypsum with high impurity ion content.
Therefore, development of a new approach for resource utilization of low-quality desulfurized gypsum having a high impurity ion content is required.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The application provides gypsum-based plastering mortar prepared from low-quality desulfurized gypsum, which has good heat-insulating property, can be directly coated on the surface of a building wall or pasted on the surface of the building wall after being cast into a prefabricated plate in a cast-in-place manner to form a composite phase-change heat-storage wall, and improves the heat-storage capacity of a building enclosure.
Specifically, the present application provides a gypsum-based plastering mortar comprising a gypsum-based plastering material and water, wherein the gypsum-based plastering material comprises low-quality desulfurized gypsum, and the content of the low-quality desulfurized gypsum is 30 to 60% based on 100% by dry weight of the gypsum-based plastering material.
On one hand, the desulfurized gypsum is used as a base material of a plastering material and a carrier when a phase-change energy-storage heat-storage material is doped, and on the other hand, slurry formed after the desulfurized gypsum with high impurity ion content is added into mixing water can generate water-containing crystals (such as NaSO) after being hardened4·10H2O、NaSO4·7H2O，CaCl2·6H2O), the crystal is an inorganic phase-change material, and the formation of the material plays a role in enhancing the energy storage performance of the doped phase-change energy-storage heat-storage material, so that the heat preservation performance of the gypsum-based plastering material is optimized.
In the embodiment of the application, the sodium ion content in the low-quality desulfurized gypsum can be more than or equal to 0.2 percent, and the magnesium ion content can be less than or equal to 0.1 percent.
In an embodiment of the present application, the content of chloride ions in the low-quality desulfurized gypsum may be 0.3% or more.
In an embodiment of the present application, the low-quality desulfurized gypsum may have a particle size of 80 to 100 mesh. The granularity of the low-quality desulfurized gypsum is in the range, and the gypsum-based plastering material with excellent construction performance, good volume stability and good workability can be obtained.
In an embodiment of the present application, the gypsum-based plastering material may further include a phase-change energy-storage heat-storage material, and the content of the phase-change energy-storage heat-storage material may be 30-50% by dry weight of the gypsum-based plastering material.
The phase-change energy-storage heat storage material is a thermal function material, can store energy in the body in the form of phase-change latent heat, and realizes the conversion of the energy between different empty positions, so the phase-change latent heat of the phase-change energy-storage heat storage material can be utilized to realize the storage and utilization of the energy.
Optionally, the phase change energy storage and heat storage material is a composite shape-stabilized phase change energy storage and heat storage material.
Optionally, the composite shape-stabilized phase-change energy-storage heat storage material is a solid-solid type composite shape-stabilized phase-change energy-storage heat storage material.
The solid-liquid phase change energy storage and heat storage material can generate solid-liquid interconversion when in use, and a special container is required for packaging, so that not only is the economic cost increased, but also the heat transfer resistance between the heat transfer medium and the phase change energy storage and heat storage material is increased, and the heat exchange efficiency is reduced. Therefore, the solid-solid type composite shape-stabilized phase change energy storage and heat storage material is selected.
In the embodiment of the application, the composite shape-stabilized phase-change energy-storage and heat-storage material can be composed of a paraffin substance as a main heat storage agent, high-density polyethylene, styrene-butadiene-styrene triblock copolymer and expanded graphite as an encapsulating support body. For example, it can be prepared by referring to the method disclosed in chinese patent ZL 200410101555.1.
In the embodiment of the application, the composite shape-stabilized phase-change energy-storage heat-storage material can be modified according to the following method: and crushing the composite shape-stabilized phase-change energy-storage heat storage material into a granular material with the equivalent diameter less than 2mm, and grinding the granular material into powder with the granularity of 80 meshes.
The composite shape-stabilized phase-change energy-storage heat-storage material before modification has high hydrophobicity and poor compatibility with gypsum-based materials, is modified before use to convert the material into hydrophilic material, and can improve the heat conduction performance and engineering applicability of the composite shape-stabilized phase-change energy-storage heat-storage material in gypsum-based plastering materials.
In the embodiment of the present application, the gypsum-based plastering material may further include cement, a retarder, latex powder, a water reducing agent, cellulose ether, fly ash and sand, wherein the dry weight of the gypsum-based plastering material is 100%, the content of the cement is 0-20%, the content of the retarder is 0.1-0.8%, the content of the latex powder is 0-4%, the content of the water reducing agent is 0.1-0.6%, the content of the cellulose ether is 0.1-0.5%, the content of the fly ash is 0-5%, and the content of the sand is 0-30%.
In embodiments of the present application, the retarder may be selected from one or more of boric acid, borax, slaked lime, sodium hexametaphosphate, sodium polyphosphate, and ammonium phosphate.
Optionally, the set retarder comprises borax.
Before slurry formed after the gypsum-based plastering material is added with mixing water is coagulated, borax has the effect of retarding coagulation. The borax used in the application has an excellent retarding effect as a retarder, and has a small influence on the strength of a plastering material. And borax is used for treating the water-containing crystals (such as NaSO) in the desulfurized gypsum after the slurry is hardened4·10H2O) plays the role of a nucleating agent, and optimizes the performance of the water-containing crystal in the desulfurized gypsum as an inorganic phase change material. Meanwhile, the borax can improve the water resistance and the antibacterial performance of the gypsum-based plastering material.
In embodiments of the present application, the latex powder may be a redispersible latex powder, for example, a redispersible latex powder manufactured by wacker, fortita corporation. The redispersible latex powder can obviously improve the cohesion and flexibility of the material and improve the bonding property and the breaking strength of the material.
In an embodiment of the present application, the water reducing agent may be a water reducing agent that acts as a retarding agent for gypsum-based plastering materials.
Optionally, the water reducer is selected from one or more of high performance polycarboxylic acid type, melamine type sulphonated polycondensate water reducers.
Optionally, the water reducing agent is present in an amount of 0.2-0.5%.
In the embodiment of this application, the cellulose ether can be hydroxypropyl methyl cellulose (HPMC), and HPMC can improve bonding property, reinforcing material's water retentivity, improvement material's tensile strength.
In embodiments herein, the fly ash may be class II fly ash having a particle size of 300-450 mesh.
In an embodiment of the present application, the sand may be fine river sand having a particle size of 70 to 150 mesh.
In an embodiment of the present application, the gypsum-based plastering material is prepared by the following method:
uniformly mixing low-quality desulfurized gypsum, a phase-change energy-storage heat-storage material and a retarder, and maintaining for 5-40 minutes at a constant temperature (the temperature is 40 +/-2 ℃) and under a constant pressure (the vacuum degree is-0.09 MPa to 0.01MPa), so that the phase-change energy-storage heat-storage material is packaged on the low-quality desulfurized gypsum to obtain premixed powder;
blending the premixed powder with fly ash and sands with different particle sizes, and optimizing the particle size distribution of the mixture;
adding cement, latex powder, a water reducing agent and cellulose ether.
In an embodiment of the present application, the amount of water is determined according to the method of "determination of water amount for standard diffusivity" in the national standard GB/T28627-2012.
Optionally, the weight ratio of gypsum-based plastering material to water is (1.5-3): 1.
the gypsum-based plastering mortar uses low-quality desulfurized gypsum as a main raw material, and the cement addition amount is less or even completely absent, so that the gypsum-based plastering mortar is completely different from a gypsum-cement mixed system of the traditional plastering mortar. Meanwhile, the porous structure of the gypsum can be used as a carrier of the phase-change material, and plays a role in packaging the phase-change energy-storage heat-storage material.
Experimental results show that the gypsum-based plastering mortar has high strength and strong bonding force with a base layer, all the performances meet the specified requirements of the surface layer plastering gypsum in the national standard GB/T28627-2012 plastering gypsum, and meanwhile, the heat conductivity coefficient is excellent and meets the specified requirements of the heat-insulating layer plastering gypsum. Compared with the existing cement mortar, the gypsum-based plastering mortar has the following advantages:
1. the low-quality desulfurized gypsum with high impurity content is used as the main raw material, so that the resource utilization of the low-quality desulfurized gypsum is realized, and the heat insulation performance of the mortar is improved.
2. The heat conductivity coefficient (0.05-0.1 w/m.K (25 ℃)) is lower, the heat insulation performance is good, and the energy consumption of the building envelope structure can be effectively reduced; meanwhile, the sound insulation performance is good.
3. Because the gypsum is porous material for the inside a large amount of capillary pores that have of gypsum base plastering mortar of this application, have stronger adsorption efficiency to the vapor in the air, consequently the gypsum base plastering mortar of this application has good respiratory property.
4. The temperature control device has the temperature control function, can effectively reduce the fluctuation range of indoor temperature, and improves the living comfort.
5. The compatibility among various raw material components is good, and the regulation and control are easy.
6. When the gypsum-based plastering material is prepared by utilizing the paraffin composite shape-stabilized phase-change energy-storage heat storage material, the water resistance (the softening coefficient is 0.5-0.7) of the gypsum-based plastering material can be obviously improved, and the application range of the gypsum-based plastering mortar is expanded.
7. The gypsum-based plastering mortar has small drying shrinkage or hardening shrinkage;
8. when the retarder of selection includes borax, can improve the waterproof effect of the gypsum base plastering mortar of this application, improve the humidity resistance of mortar, give gypsum base plastering mortar certain antibacterial function simultaneously.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
FIG. 1 is a graph showing the change of wall temperature with time after gypsum-based plastering mortar is applied to the wall in Beijing area in summer.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The desulfurized gypsum used in the following examples is from a Huanengtai power plant, the sodium ion content is 0.27%, the chloride ion content is 0.31%, the magnesium ion content is 0.003%, the desulfurized gypsum used in the comparative examples is from Xin Yuan development Co., Ltd, Qing river district, Chi Ling city, the sodium ion content is 0.005%, the chloride ion content is 0.003%, the composite shape-stabilized phase-change energy-storage heat-storage material is prepared according to the method disclosed in example 1 of Chinese patent ZL200410101555.1, the water reducing agent is Bass MELMENT F10, and other raw materials and reagents are all common commercial products.
Examples and comparative examples
1. Modification of composite shape-stabilized phase-change energy-storage heat-storage material
The composite shape-stabilized phase-change energy-storage heat storage material is subjected to primary physical crushing in a crushing device, crushed into granular material with the equivalent diameter of less than 2mm, and then placed in a grinding device for grinding to 150 meshes.
2. Preparation of gypsum-based plastering material
Step 1: weighing the components according to the mass in the table 1;
step 2: uniformly mixing the desulfurized gypsum, the modified composite shape-stabilized phase change energy storage heat storage material and the retarder, putting the mixture into a constant-temperature and constant-pressure vacuum drying oven, keeping the temperature at 40 +/-2 ℃ and the vacuum degree at-0.08 MPa, and vacuumizing for 10 minutes;
and step 3: blending the premixed powder obtained in the step 2 with fly ash and sands with different particle sizes, screening out 70-90-mesh fine river sand by optimizing the particle size of the mixture, and uniformly mixing;
and 4, step 4: and (3) uniformly mixing the premixed powder obtained in the step (3) with cement, a water reducing agent, latex powder and cellulose ether to obtain the gypsum-based plastering material.
3. Preparation of gypsum-based plastering mortar
The prepared gypsum-based plastering material is mixed with mixing water to prepare gypsum-based plastering mortar. Wherein, the dosage of the mixing water is determined according to a method of 7.4.2.1 'determination of water consumption of standard diffusivity' in the national standard GB/T28627-2012 plastering gypsum.
TABLE 1
Test example 1
The gypsum-based plastering mortar prepared by the method is tested for setting time, water retention rate, flexural strength and compressive strength according to the method specified in GB/T28627-2012 plastering Gypsum. The tensile bond strength of the gypsum-based plastering mortar prepared by the method specified in JGJ/70-2009 building mortar basic performance test method Standard is tested. The thermal conductivity of the gypsum-based plastering mortar prepared above was measured according to the method prescribed in GB/T10294-2008 "measurement of thermal insulation Material Stable State thermal resistance and related characteristics". The results are reported in Table 2.
TABLE 2
As can be seen from Table 2, the gypsum-based plastering mortar prepared in the examples of the present application has greatly reduced cement consumption and increased desulfurized gypsum, especially low-quality desulfurized gypsum, and still satisfies the national standards in terms of various properties. Comparing examples 1-3 with comparative example 1, it can be seen that the addition of the phase-change energy-storage heat-storage material can significantly reduce the lower thermal conductivity of the gypsum-based plastering mortar and improve the water resistance. It can be seen from comparison of embodiment 1 and comparative example 2 that the heat conductivity coefficient of the plastering mortar prepared by using the low-quality desulfurized gypsum is smaller than that of the plastering mortar prepared by using the common desulfurized gypsum, and other performances are equivalent, which indicates that impurity ions in the low-quality desulfurized gypsum do not have adverse effects on the performances of the plastering mortar, and the heat insulation performance of the plastering mortar can be improved to a certain extent.
Test example 2
According to the heat insulation design requirement in GB50176-1993 civil construction thermal engineering design specifications, the maximum temperature of the inner surface of the east and west outer walls of the house is lower than the maximum value of the outdoor calculation temperature in summer under the natural ventilation condition of the room. Therefore, the phase-change energy-storage plastering mortar is smeared on the inner side of the western-style wall to increase the heat-insulating property of the wall and prevent the temperature of the inner surface of the wall from being too high when the wall is exposed to the sun in summer.
10mm of the gypsum-based plastering mortar prepared in the example 1, the comparative example 1 and the comparative example 2 are respectively coated on indoor west wall surfaces in Beijing area, the temperature of the inner surface of the west wall is respectively tested in different summer moments, and the test result is shown in figure 1.
As can be seen from fig. 1, in beijing, after the gypsum-based plastering mortar of embodiment 1 of the present application is coated on a wall in summer, the fluctuation of the indoor temperature can be controlled within a narrow range, which shows that the temperature control effect of the gypsum-based plastering mortar of embodiment 1 of the present application is significant.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (5)
1. The gypsum-based plastering mortar comprises a gypsum-based plastering material and water, wherein the gypsum-based plastering material comprises low-quality desulfurized gypsum and a phase-change energy-storage heat-storage material, and the content of the low-quality desulfurized gypsum is 30-60% by dry weight of the gypsum-based plastering material as 100%; the content of the phase-change energy-storage heat storage material is 30-50%; the content of sodium ions in the low-quality desulfurized gypsum is more than or equal to 0.2 percent, and the content of magnesium ions in the low-quality desulfurized gypsum is less than or equal to 0.1 percent;
the gypsum-based plastering material also comprises cement, a retarder, latex powder, a water reducing agent, cellulose ether, fly ash and sand, wherein the dry weight of the gypsum-based plastering material is 100%, the content of the cement is 0-20%, the content of the retarder is 0.1-0.8%, the content of the latex powder is 0-4%, the content of the water reducing agent is 0.1-0.6%, the content of the cellulose ether is 0.1-0.5%, the content of the fly ash is 0-5%, and the content of the sand is 0-30%; the phase-change energy-storage heat-storage material is a composite shape-stabilized phase-change energy-storage heat-storage material; the composite shape-stabilized phase-change energy-storage heat storage material is composed of a paraffin substance as a main heat storage agent, high-density polyethylene, a styrene-butadiene-styrene triblock copolymer and expanded graphite as an encapsulation support body.
2. The gypsum-based plastering mortar of claim 1, wherein the composite shape-stabilized phase-change energy-storing and heat-storing material is modified by the following method: and crushing the composite shape-stabilized phase-change energy-storage heat storage material into a granular material with the equivalent diameter less than 2mm, and grinding the granular material into powder with the granularity of 80-400 meshes.
3. The gypsum-based plastering mortar of claim 1, wherein,
the retarder is selected from one or more of boric acid, borax, slaked lime, sodium hexametaphosphate, sodium polyphosphate and ammonium phosphate;
the latex powder is redispersible latex powder;
the water reducing agent is selected from one or more of polycarboxylic acids and melamine type sulfonated polycondensate water reducing agents;
the cellulose ether is hydroxypropyl methyl cellulose;
the fly ash is II-grade fly ash with the granularity of 300-450 meshes;
the sand is fine river sand with the granularity of 70-150 meshes.
4. The gypsum-based plastering mortar of claim 1, wherein the amount of water is determined according to the method of "determination of Water consumption for Standard diffusivity" in the national Standard GB/T28627-2012.
5. The gypsum-based plastering mortar of claim 1, wherein the weight ratio of gypsum-based plastering material to water is (1.5-3): 1.
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| CN113265171A (en) * | 2021-04-09 | 2021-08-17 | 龙牌粉料(太仓)有限公司 | Cold-resistant heat-insulating building troweling gypsum and preparation process thereof |
| CN113620637B (en) * | 2021-08-13 | 2022-09-13 | 中国地质大学（北京） | Phase-change energy-storage heat-storage material and preparation method thereof |
| CN113651586B (en) * | 2021-09-26 | 2022-10-21 | 临海市忠信新型建材有限公司 | Bottom layer plastering gypsum and preparation method thereof |
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| CN101880149A (en) * | 2010-07-13 | 2010-11-10 | 唐山市思远涂料有限公司 | Phase-change and energy-storage desulfurized gypsum interior wall thermal-insulation mortar |
| CN102060497A (en) * | 2010-12-03 | 2011-05-18 | 上海英硕聚合物材料有限公司 | Phase change composite heat-insulating mortar with desulfurization gypsum as main gelled material |
| CN102417340A (en) * | 2011-08-31 | 2012-04-18 | 南京工业大学 | Gypsum-based phase change energy storage polymer insulation mortar and preparation method thereof |
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