CN109133826A - A kind of gypsum base plastering material - Google Patents
A kind of gypsum base plastering material Download PDFInfo
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- CN109133826A CN109133826A CN201710506708.8A CN201710506708A CN109133826A CN 109133826 A CN109133826 A CN 109133826A CN 201710506708 A CN201710506708 A CN 201710506708A CN 109133826 A CN109133826 A CN 109133826A
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- gypsum
- plastering material
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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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Building Environments (AREA)
Abstract
A kind of gypsum base plastering material, it is in terms of 100% by the dry weight of gypsum base plastering material, the gypsum base plastering material includes the low-quality desulfurized gypsum of 30-60%, 30-50% phase-changing energy-storing heat accumulating, 0-20% cement, 0.1-0.8% retarder, 0-4% latex powder, 0.1-0.6% water-reducing agent, 0.1-0.5% cellulose ether, 0-5% flyash and 0-30% sand.The gypsum base plastering material of the application material based on the high low-quality desulfurized gypsum of impurity content realizes the resource utilization of low-quality desulfurized gypsum, and has the performances such as preferable heat preservation, sound insulation, waterproof and antibacterial.
Description
Technical field
This application involves but be not limited to New Building Materials technical field, more particularly to but be not limited to a kind of gypsum base and smear
Putty material.
Background technique
Gypsum is a kind of porous construction material, more sensitive to air humidity and temperature, has good adjusting ring
The ability of border humidity and temperature, and other functional materials can be loaded in porous structure.However, certain desulfurized gesso of flue gas
In contain a certain amount of soluble impurity (such as sodium ion, magnesium ion and chloride ion), the high desulfurized gypsum pair of impurity ion content
The performance of plastering has undesirable influence, for example, with the Thistle board of the high desulfurized gypsum preparation of impurity ion content, easily
There is the problems such as plate core is detached from core, frost is returned on surface.
In recent years, the country has many R&D institutions to carry out the utilization natural gypsum and industry by-product gypsum (desulfurization stone in succession
Cream, ardealite, fluorgypsum etc.) etc. substrates carry out the research work of functional gypsum base plastering material preparation and application etc.,
But the research in relation to preparing the excellent thermal insulation material of heat-proof quality using the higher low-quality desulfurized gypsum of impurity ion content,
But it is rarely reported.
Therefore, it is necessary to develop the new way of the high low-quality desulfurized gypsum resource utilization of impurity ion content.
Summary of the invention
It is the general introduction to the theme being described in detail herein below.This general introduction is not the protection model in order to limit claim
It encloses.
This application provides a kind of gypsum base plastering material prepared using low-quality desulfurized gypsum, gypsum base plastering materials
Material does not include cement or comprising less amount of cement, has preferable thermal insulation property.
Specifically, this application provides a kind of gypsum base plastering material, the gypsum base plastering material includes low-quality de-
Sulphur gypsum is in terms of 100% by the dry weight of gypsum base plastering material, and the content of the low-quality desulfurized gypsum is 30-60%.
Substrate and carrier when incorporation phase-changing energy-storing heat accumulating, another party of the one side desulfurized gypsum as plastering material
Impurity ion content high desulfurized gypsum in face can generate water-containing crystal object (such as after the slurry hardening formed after mixing water is added
NaSO4·10H2O、NaSO4·7H2O, CaCl2·6H2O), the crystal itself is a kind of inorganic phase-changing material, the shape of the material
The accumulation of energy performance of the phase-changing energy-storing heat accumulating mixed in pairs plays the role of reinforcement, to optimize the guarantor of gypsum base plastering material
Warm nature energy.
In presently filed embodiment, sodium ions content in the low-quality desulfurized gypsum can with >=0.2%, magnesium from
Sub- content can be with≤0.1%.
In presently filed embodiment, the chloride ion content in the low-quality desulfurized gypsum can be with >=0.3%.
In presently filed embodiment, the granularity of the low-quality desulfurized gypsum can be 80-100 mesh.The low product
The granularity of matter desulfurized gypsum within the above range, can obtain workability is excellent, volume stability is good, workability can be preferable
Gypsum base plastering material.
In presently filed embodiment, the gypsum base plastering material can also include phase-changing energy-storing heat accumulating, with
The dry weight of gypsum base plastering material is 100% meter, and the content of the phase-changing energy-storing heat accumulating can be 30-50%.
Phase-changing energy-storing heat accumulating is a kind of heat function material, and energy can be stored to its body in the form of latent heat of phase change
It is interior, realize conversion of the energy between different space-time positions, therefore can be real using the latent heat of phase change of phase-changing energy-storing heat accumulating
The storage and utilization of existing energy.
Optionally, the phase-changing energy-storing heat accumulating is composite shape-setting phase-changing energy-storing heat accumulating.
Optionally, the composite shape-setting phase-changing energy-storing heat accumulating is the composite shape-setting phase-changing energy-storing heat accumulation of solid-solid type
Material.
Since mutually converting for solid-liquid can occur when in use for solid-liquid phase change accumulation of energy heat accumulating, it is necessary to using special
The container encapsulation of door, not only increases economic cost, and increase the biography between heat transfer medium and phase-changing energy-storing heat accumulating
Thermal resistance reduces heat exchange efficiency.Therefore, the application selects the composite shape-setting phase-changing energy-storing heat accumulating of solid-solid type.
In presently filed embodiment, the composite shape-setting phase-changing energy-storing heat accumulating can be by a kind of paraffin substance
As main storage thermit powder, high density polyethylene (HDPE), styrene-butadiene-styrene triblock copolymer, expanded graphite make encapsulating branch
Support body is constituted.For example, being referred to the preparation of method disclosed in Chinese patent ZL200410101555.1.
In presently filed embodiment, the composite shape-setting phase-changing energy-storing heat accumulating can carry out by the following method
It is modified: the composite shape-setting phase-changing energy-storing heat accumulating is crushed to the granular material of equivalent diameter < 2mm, grinding to granularity
For 80 mesh.
Composite shape-setting phase-changing energy-storing heat accumulating before modified shows as very high hydrophobicity, compatible with gypsum base material
Property it is poor, be modified processing to it using preceding and be translated into hydrophilic, composite shape-setting phase-changing energy-storing heat accumulation can be improved
Heat-conductive characteristic of the material in gypsum base plastering material and engineer application.
In presently filed embodiment, the gypsum base plastering material can also include cement, retarder, latex
Powder, water-reducing agent, cellulose ether, flyash and sand, by the dry weight of gypsum base plastering material be 100% in terms of, the cement
Content is 0-20%, and the content of the retarder is 0.1-0.8%, and the content of the latex powder is 0-4%, the water-reducing agent
Content is 0.1-0.6%, and the content of the cellulose ether is 0.1-0.5%, and the content of the flyash is 0-5%, the sand
The content of son is 0-30%.
In presently filed embodiment, the retarder can be selected from boric acid, borax, calcium hydroxide, calgon, more
One of polyphosphate sodium and ammonium phosphate or more.
Optionally, the retarder includes borax.
Before the slurry formed after mixing water is added in gypsum base plastering material coagulates, borax plays the effect of slow setting.
Borax used in this application has excellent retarding effect as retarder, and smaller to the intensity effect of plastering material.And
Borax is after slurry hardening to water-containing crystal object (such as NaSO in desulfurized gypsum4·10H2O) play the role of nucleating agent, optimize
Performance of the water-containing crystal object as inorganic phase-changing material in desulfurized gypsum.Meanwhile borax can improve gypsum base plastering material
The water resistance and anti-microbial property of material.
In presently filed embodiment, the latex powder can be redispersible latex powder, for example, watt gram, Yi Lai
The redispersible latex powder of the production of safe company.Redispersible latex powder can significantly improve the cohesion of material and flexible
Property, improve material adhesive property and flexural strength.
In presently filed embodiment, the water-reducing agent can be the diminishing to gypsum base plastering material deferred action
Agent.
Optionally, the water-reducing agent is selected from one of high-performance polycarboxylic-acid, melamine type sulfonic acid polycondensates water-reducing agent
Or more.
Optionally, the content of the water-reducing agent is 0.2-0.5%.
In presently filed embodiment, the cellulose ether can be hydroxypropyl methyl cellulose (HPMC), and HPMC can
To improve adhesive property, the water-retaining property of reinforcing material improves the tensile strength of material.
In presently filed embodiment, the flyash can be that granularity is II grade of flyash of 300-450 purpose.
In presently filed embodiment, the sand can be that granularity is the thin river sand of 70-150 purpose.
In presently filed embodiment, the gypsum base plastering material is prepared by following methods:
Low-quality desulfurized gypsum, phase-changing energy-storing heat accumulating and retarder are uniformly mixed, in constant temperature, (temperature is 40 ± 2
DEG C), constant pressure (under conditions of vacuum degree is -0.09MPa to 0.01MPa), maintains 5-40 minutes, so that the phase-changing energy-storing heat accumulation
Material is encapsulated on the low-quality desulfurized gypsum, obtains premixing flour；
The sand of the premixing flour and flyash, different-grain diameter is deployed, the grain composition of mixture is optimized；
Cement, latex powder, water-reducing agent and cellulose ether is added.
The material of main part of the gypsum base plastering material of the application is desulfurized gypsum, and cement additive amount is less not to be had even completely
Have, therefore entirely different with the gypsum cement mixed system of traditional plastering material.Meanwhile the porous structure of gypsum allows to
As the carrier of phase-change material, encapsulation effect is played to phase-changing energy-storing heat accumulating.
The experimental results showed that the intensity of the gypsum base plastering material of the application is high, properties meet standard GB/T/
The prescribed requirement of finish coat gypsum in T28627-2012 " plastering gupsum ", while thermal coefficient is excellent, meets insulating layer plastering
The prescribed requirement of gypsum is strong using the decorative mortar of its preparation and the cohesive force of base.With existing cement base plastering material phase
Than the gypsum base plastering material of the application has the advantage that
1. the gypsum base plastering material of the application material based on the high low-quality desulfurized gypsum of impurity (sodium ion) content
Material is not only to realize the resource utilization of low-quality desulfurized gypsum, and improve the thermal insulation property of gypsum base plastering material.
2. the thermal coefficient (0.05-0.1w/mK (25 DEG C)) of the gypsum base plastering material of the application is lower, have good
Thermal insulation property, can effectively reduce the energy consumption of architectural exterior-protecting construction；Sound insulation value is good simultaneously.
3. due to gypsum be porous material so that using the application gypsum base plastering material prepare decorative mortar in
Portion has a large amount of capillary porosities, has stronger adsorption capacity to the vapor in air, so that decorative mortar is with good
Good breathable properties.
4. the gypsum base plastering material of the application has temperature adjustment function, the fluctuation range of room temperature can be effectively reduced,
Improve comfortable for living.
5. the compatibility in the gypsum base plastering material of the application between various components is good, control is easily adjusted.
6. can be significantly improved when using mineral wax composite shape-setting phase-changing energy-storing heat accumulating preparation gypsum base plastering material
The water resistance (coefficient of softing 0.5-0.7) of gypsum base plastering material, expands the application range of gypsum base plastering material.
7. the drying of the decorative mortar prepared using the gypsum base plastering material of the application is shunk or curing shrinkage rate is small；
8. the waterproof effect of the gypsum base plastering material of the application can be improved when in the retarder of selection including borax
Fruit improves humidity resistance, while assigning gypsum base plastering material certain antibacterial functions.
Other features and advantage will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood and implementing the application.The purpose of the application and other advantages can be by specifications, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical scheme, and constitutes part of specification, with this
The embodiment of application is used to explain the technical solution of the application together, does not constitute the limitation to technical scheme.
Fig. 1 is that metope temperature of the summer on the wall of Beijing area after brushing gypsum base plastering mortar changes with time
Curve.
Specific embodiment
For the purposes, technical schemes and advantages of the application are more clearly understood, below in conjunction with attached drawing to the application
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Used desulfurized gypsum comes from Huaneng Group granary power plant in following embodiment, sodium ions content 0.27%, chlorine from
Sub- content 0.31%, magnesium ion content 0.003%, used desulfurized gypsum is from the prosperous source hair in Tieling Qinghe District in comparative example
Open up Co., Ltd, sodium ions content 0.005%, chloride ion content 0.003%, composite shape-setting phase-changing energy-storing heat accumulating according to
The preparation of method disclosed in the embodiment 1 of Chinese patent ZL200410101555.1, water-reducing agent are BASF MELMENT F10,
His raw materials and reagents are ordinary commercial products.
Embodiment and comparative example
1, the modification of composite shape-setting phase-changing energy-storing heat accumulating
Composite shape-setting phase-changing energy-storing heat accumulating is carried out preliminary physics to be crushed in crushing device, it is straight to be broken for equivalent
Diameter is less than 2mm granular material, is subsequently placed in grinding device grinding to 150 mesh.
2, the preparation of gypsum base plastering material
Step 1: according to the quality weighing each component in table 1；
Step 2: desulfurized gypsum, modified composite shape-setting phase-changing energy-storing heat accumulating, retarder being uniformly mixed, constant temperature is put into
In constant pressure vacuum oven, temperature is 40 ± 2 DEG C, and vacuum degree is -0.08MPa, and the temperature and vacuum degree is maintained to vacuumize 10 points
Clock；
Step 3: the sand of premixing flour and flyash, different-grain diameter that step 2 is obtained is deployed, and passes through optimization mixture
Grain composition filters out the thin river sand of 70-90 purpose, is uniformly mixed；
Step 4: the resulting premixing flour of step 3 being uniformly mixed with cement, water-reducing agent, latex powder, cellulose ether, institute is made
State gypsum base plastering material.
3, the preparation of gypsum base plastering mortar
The gypsum base plastering material of above-mentioned preparation is mixed with mixing water, is configured to gypsum base plastering mortar.Wherein, mix
The dosage of water is according to the 7.4.2.1 " survey of standard diffusion degree water consumption in standard GB/T/T28627-2012 " plastering gupsum "
Method measurement calmly ".
Table 1
Test case 1
The gypsum base plastering mortar of above-mentioned preparation is tested according to method as defined in GB/T28627-2012 " plastering gupsum "
Setting time, water retention, flexural strength and compression strength.According to JGJ/70-2009 " building mortar basic performance tests method mark
It is quasi- " as defined in method test above-mentioned preparation gypsum base plastering mortar tensile bond strength." absolutely according to GB/T10294-2008
Hot material steady state heat resistance and measurement in relation to characteristic " as defined in method test above-mentioned preparation gypsum base plastering mortar thermally conductive system
Number.Test result is see table 2.
Table 2
| Standard | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | |
| Water retention, % | ≥90 | 91 | 95 | 95 | 92 | 92 |
| Presetting period, h | ≥1 | 1.5 | 2 | 2.5 | 1 | 1.3 |
| Final setting time, h | ≤8 | 8 | 6 | 5.5 | 4 | 6 |
| Flexural strength, MPa | ≥3 | 3.8 | 3.5 | 4.3 | 5.9 | 4.2 |
| Compression strength, MPa | ≥6 | 7 | 6.8 | 7.9 | 9.1 | 7.4 |
| Tensile bond strength, MPa | ≥0.5 | 0.6 | 0.7 | 0.7 | 0.65 | 0.55 |
| Thermal coefficient, w/mK (25 DEG C) | ≤0.1 | 0.08 | 0.05 | 0.07 | 0.21 | 0.1 |
| Coefficient of softing | 0.5 | 0.6 | 0.55 | 0.42 | 0.5 |
From table 2 it can be seen that the gypsum base plastering material of the application greatly reduces the dosage of cement and increases desulfurization
Gypsum, especially low-quality desulfurized gypsum dosage after, the properties of the plastering mortar of preparation still meet national standard.It is right
Than embodiment 1-3 and comparative example 1 is as can be seen that the addition of phase-changing energy-storing heat accumulating can be substantially reduced gypsum base plastering material
Thermal coefficient it is lower, improve water resistance.Comparison implements 1 with comparative example 2 as can be seen that the application uses low-quality desulfurization
The thermal coefficient of the plastering material of gypsum preparation is less than the thermal coefficient of the plastering material using the preparation of common desulphurization gypsum, other
Performance is suitable, illustrates that the foreign ion in low-quality desulfurized gypsum does not have adverse effect to the performance of plastering material, can also be
Improve the thermal insulation property of plastering material to a certain extent.
Test case 2
According to the Design on thermal insulation requirement in GB50176-1993 " code for thermal design of civil buildings ", room is in gravity-flow ventilation
Under the conditions of, house east, west exterior wall inner surface maximum temperature should be lower than the peak of calculating temperature outside summer room.It therefore, will be sharp
Western side within the walls is applied to increase the heat-proof quality of wall with plastering mortar prepared by the gypsum base plastering material of the application, is prevented
Wall internal surface temperature when summer is with a western exposure is excessively high.
Smear gypsum base prepared by 10mm embodiment 1, comparative example 1, comparative example 2 on western metope respectively in the room of Beijing area
Plastering mortar tests western CALCULATE TEMPERATURE INSIDE WALL in different moments summer respectively, and test result is shown in Fig. 1.
It will be seen from figure 1 that Beijing during Summer Time utilizes the gypsum base plastering material of the embodiment of the present application 1 in wall brushing
After the decorative mortar of preparation, it can be achieved that by the undulated control of room temperature in relatively narrow range, illustrate the embodiment of the present application 1
Gypsum base plastering material has good thermal insulation property.
Although embodiment disclosed by the application is as above, the content only for ease of understanding the application and use
Embodiment is not limited to the application.Technical staff in any the application fields, is taken off not departing from the application
Under the premise of the spirit and scope of dew, any modification and variation, but the application can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of gypsum base plastering material, the gypsum base plastering material includes low-quality desulfurized gypsum, with gypsum base plastering material
The dry weight of material is 100% meter, and the content of the low-quality desulfurized gypsum is 30-60%.
2. gypsum base plastering material according to claim 1, wherein the sodium ions content in the low-quality desulfurized gypsum
>=0.2%, magnesium ion content≤0.1%.
3. gypsum base plastering material according to claim 2, wherein the chloride ion content in the low-quality desulfurized gypsum
>=0.3%.
4. gypsum base plastering material according to claim 1, wherein the granularity of the low-quality desulfurized gypsum is 80-100
Mesh.
5. gypsum base plastering material described in any one of -4 according to claim 1, further includes phase-changing energy-storing heat accumulating, with stone
The dry weight of cream base plastering material is 100% meter, and the content of the phase-changing energy-storing heat accumulating is 30-50%.
6. gypsum base plastering material according to claim 5, wherein the phase-changing energy-storing heat accumulating is composite shape-setting phase
Become accumulation of energy heat accumulating；Optionally, the composite shape-setting phase-changing energy-storing heat accumulating is that the composite shape-setting phase transformation of solid-solid type stores
It can heat accumulating.
7. gypsum base plastering material according to claim 6, wherein the composite shape-setting phase-changing energy-storing heat accumulating is by one
Kind paraffin substance is as main storage thermit powder, high density polyethylene (HDPE), styrene-butadiene-styrene triblock copolymer, expansion
Graphite is made encapsulating supporter and is constituted.
8. gypsum base plastering material according to claim 5, wherein the composite shape-setting phase-changing energy-storing heat accumulating according to
Following methods are modified: the composite shape-setting phase-changing energy-storing heat accumulating is crushed to the graininess material of equivalent diameter < 2mm
Material, grinding to granularity are 80-400 mesh.
9. gypsum base plastering material according to claim 1 to 8 further includes cement, retarder, latex powder, subtracts
Aqua, cellulose ether, flyash and sand are in terms of 100% by the dry weight of gypsum base plastering material, and the content of the cement is
0-20%, the content of the retarder are 0.1-0.8%, and the content of the latex powder is 0-4%, and the content of the water-reducing agent is
0.1-0.6%, the content of the cellulose ether are 0.1-0.5%, and the content of the flyash is 0-5%, and the sand contains
Amount is 0-30%.
10. gypsum base plastering material according to claim 9, wherein
The retarder is selected from one of boric acid, borax, calcium hydroxide, calgon, sodium polyphosphate and ammonium phosphate or more
It is a variety of；
Optionally,
The retarder includes borax；
The latex powder is redispersible latex powder；
The water-reducing agent is selected from one of polycarboxylic acid, melamine type sulfonic acid polycondensates water-reducing agent or more；
The cellulose ether is hydroxypropyl methyl cellulose；
The flyash is that granularity is II grade of flyash of 300-450 purpose；
The sand is that granularity is the thin river sand of 70-150 purpose.
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| CN201710506708.8A CN109133826B (en) | 2017-06-28 | 2017-06-28 | Gypsum-based plastering material |
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| CN112209695A (en) * | 2020-10-13 | 2021-01-12 | 广东博智林机器人有限公司 | Plastering gypsum slurry and dry powder thereof |
| CN113620637A (en) * | 2021-08-13 | 2021-11-09 | 中国地质大学（北京） | Phase-change energy-storage heat-storage material and preparation method thereof |
| CN115215626A (en) * | 2022-06-29 | 2022-10-21 | 中电国瑞供应链管理有限公司 | Plastering gypsum, plastering gypsum prefabricated product and preparation method of plastering gypsum |
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| CN109133826B (en) | 2020-10-30 |
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