CN114477934A - Bi-component gypsum-based plastering mortar and preparation method thereof - Google Patents
Bi-component gypsum-based plastering mortar and preparation method thereof Download PDFInfo
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- CN114477934A CN114477934A CN202011144488.7A CN202011144488A CN114477934A CN 114477934 A CN114477934 A CN 114477934A CN 202011144488 A CN202011144488 A CN 202011144488A CN 114477934 A CN114477934 A CN 114477934A
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- gypsum
- plastering mortar
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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
- 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
- C04B28/143—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 phosphogypsum
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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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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)
Abstract
A two-component gypsum-based plastering mortar and a preparation method thereof, the two-component gypsum-based plastering mortar consists of a component A cementing material and a component B aggregate, wherein the main component of the component A cementing material is industrial byproduct gypsum, and an additive comprises hydroxypropyl methyl cellulose, magnesium aluminum silicate, a protein gypsum retarder, aluminum potassium sulfate and latex powder; the aggregate of the component B is tailing ultra-fine sand. The invention also comprises a preparation method of the two-component gypsum-based plastering mortar. The bi-component gypsum-based plastering mortar has good easiness and compatibility, excellent crack resistance, permeability resistance, frost resistance, dry shrinkage resistance, safety, stability, weather resistance and construction performance, low production cost and construction cost, is suitable for mechanized spraying construction, and has construction efficiency 3 times that of the traditional manual construction method; the common problems of engineering quality such as hollowing, cracking and the like can be thoroughly solved; the heat conductivity coefficient is low; the preparation and processing equipment is simple, the materials are convenient to obtain, and the operation is simple and convenient.
Description
Technical Field
The invention relates to a gypsum-based plastering mortar, in particular to a gypsum-based plastering mortar prepared by utilizing industrial solid wastes and a preparation method thereof.
Background
The application of the plastering mortar for buildings in the civil building wall plastering and decoration and finishing markets is not obvious.
The traditional plastering mortar is formed by mixing cement and sand, after plastering construction is dry, hollowing is easy to generate, a large amount of sand is used as aggregate, and natural sand resources are gradually exhausted.
At present, the gypsum-based plastering mortar adopts the vitrified micro bubbles as the aggregate of the mortar, however, the vitrified micro bubbles cannot be obtained from local materials, the production cost and the transportation cost are very high, and the vitrified micro bubbles have very low strength and cannot adapt to mechanized spraying construction at all, thereby causing the material cost and the construction cost to be multiplied.
On the other hand, a lot of mine tailing dams accumulate a large amount of tailing sand, so that large land resources are occupied, the environment is polluted, and dam collapse danger exists, so that the mine tailing dams are a great potential safety hazard.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provide the bi-component gypsum-based plastering mortar which does not generate hollowing, has low production cost and transportation cost and does not use natural sand and vitrified micro bubbles as aggregates.
The invention further aims to solve the technical problem of providing the preparation method of the bi-component gypsum-based plastering mortar, which has the advantages of simple processing equipment structure, low energy consumption and obvious energy-saving and emission-reducing effects.
The technical scheme adopted by the invention for solving the technical problems is as follows: a bi-component gypsum-based plastering mortar consists of a component A cementing material and a component B aggregate; the main component of the cementing material of the component A is industrial by-product gypsum, and the admixture comprises hydroxypropyl methyl cellulose, magnesium aluminum silicate, protein gypsum retarder, aluminum potassium sulfate and emulsion powder; the aggregate of the component B is tailing extra fine sand.
Further, the A-component cementing material comprises the following components in parts by weight: 97-99% of industrial byproduct gypsum, 0.15-0.55% of hydroxypropyl methyl cellulose, 0.15-0.55% of magnesium aluminum silicate, 0.20-0.70% of protein gypsum retarding agent, 0.20-0.70% of aluminum potassium sulfate and 0.10-0.50% of latex powder; the weight percentage takes the total weight of the cementing material as a calculation reference; the weight ratio of the cementing material of the component A to the superfine sand of the aggregate tailings of the component B is 1: 0.3-2.
Further, the industrial by-product gypsum is semi-hydrated gypsum or/and anhydrous gypsum.
Further, the semi-hydrated gypsum or the anhydrous gypsum is desulfurized gypsum or phosphogypsum.
Further, the granularity of the B component aggregate tailing ultra-fine sand is 60-800 meshes.
Further, the water content of the tailing ultrafine sand is less than or equal to 10 percent, preferably less than or equal to 5 percent.
Further, the mud content of the B component aggregate tailing ultra-fine sand is less than or equal to 3 percent, preferably less than or equal to 2 percent.
The invention further solves the technical problem and adopts the technical scheme that: a preparation method of two-component gypsum-based plastering mortar is disclosed, wherein the preparation steps of the A-component cementing material are as follows: adding additives of hydroxypropyl methylcellulose, magnesium aluminum silicate and protein gypsum retarder into industrial by-product gypsum, stirring, mixing, homogenizing, and metering and packaging to obtain a component A cementing material; the preparation steps of the aggregate of the component B are as follows: the chemical and mineral composition analysis is carried out on the tailing extra-fine sand, the heavy metal in the tailing extra-fine sand is recycled and passivated, the toxic and harmful mineral dressing additive is removed, the medium and trace elements in the metal tailings are converted from activity to stabilization form, then the dehydration treatment is carried out, and finally the metering and packaging are carried out.
When in use, the A component cementing material and the B component aggregate are mixed with required clean water according to the standard consistency and stirred uniformly, and the stirring time can not be less than 5 minutes.
The tailing ultrafine sand is formed by carrying out classification treatment after being ground by a ball mill, the sand is bead-shaped particles, the grading is superior, the particle size of the sand is less than 0.075mm and accounts for more than 65%, the fineness of industrial byproduct gypsum is concentrated between 70-140 meshes, and the synergistic effect of preparing the two-component gypsum plastering mortar by adopting the tailing ultrafine sand and the industrial byproduct gypsum mainly lies in that: the tailing extra-fine sand has large specific surface area, high fluidity and small flow loss, and greatly increases the flexibility of gypsum; when the content exceeds 30 percent, the compression strength, the impermeability and the folding strength of the mortar are obviously improved, slurry formed after water is combined between the tailing extra-fine sand and the gypsum can be compactly filled in gaps among coarse particles, so that a mortar system is more compact, the mechanical property of the mortar is obviously improved, the water consumption is greatly reduced, and the workability and the compatibility of the mortar can be greatly improved under the action of a modification additive due to the combination of the tailing extra-fine sand and the byproduct gypsum.
Compared with the existing cement mortar and single-component gypsum-based plastering mortar, the double-component gypsum-based plastering mortar has better workability and compatibility, more excellent crack resistance, permeability resistance, frost resistance, drying shrinkage resistance, safety, stability, weather resistance and construction performance, low production cost and construction cost, is suitable for mechanized spraying construction, and has construction efficiency 3 times that of the traditional manual construction method; the common problems of engineering quality such as hollowing, cracking and the like can be thoroughly solved; the heat conductivity coefficient is low; in addition, the gypsum has a breathing function, can adjust the indoor air humidity and is beneficial to improving the living comfort level.
The preparation method of the bi-component gypsum-based plastering mortar has the advantages of simple processing equipment, convenient material acquisition and simple and convenient operation. The utilization rate of solid waste is up to more than 97%, the energy-saving and emission-reducing effects are obvious, and no secondary pollution is caused. The tailing extra-fine sand and the industrial byproduct gypsum can be fully utilized, the utilization rate of industrial development of solid waste resources is greatly improved, the problem of industrial solid waste discharge is effectively solved, waste is changed into valuable, a good environment-friendly effect is achieved, and the method is a green mountain in nature.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The two-component gypsum-based plastering mortar comprises a component A cementing material and a component B aggregate gold tailing extra fine sand; the weight ratio of the cementing material of the component A to the superfine sand of the gold tailings of the aggregate of the component B is 1: 0.3;
the component A cementing material comprises the following raw materials in parts by weight: 9.9kg of desulfurized gypsum, additive: 0.015kg of hydroxypropyl methyl cellulose, 0.025kg of magnesium aluminum silicate, 0.025kg of protein gypsum retarder, 0.025kg of aluminum potassium sulfate and 0.010kg of emulsion powder. And 3.3kg of ultra-fine sand of the aggregate gold tailings of the component B.
The preparation method comprises the following steps: adding industrial byproduct desulfurized gypsum into each additive, mixing, stirring and homogenizing to obtain the A-component cementing material; the ultrafine sand of the gold tailings is recycled and passivated with heavy metals, toxic and harmful mineral processing additives are removed, and the medium and trace elements in the metal tailings are converted from activity to a stable form, dried, and then passed through a standard sieve pore of 0.25mm, the particle size is 60-800 meshes, the water content is 7%, and the mud content is 2%, so that the ultrafine sand of the gold tailings with the aggregate B is obtained.
When in use construction, firstly, the stirrer is started, clean water is injected into the stirrer according to the water requirement of standard consistency of gypsum mortar plastering construction, the component A cementing material and the component B aggregate gold tailing extra-fine sand are sequentially added for mixing and stirring, and the mixture is stirred for 5 minutes to be used.
And (3) performance detection: according to the method specified in the GB/T28627-20172 plastering Gypsum standard, the performance of the two-component gypsum-based plastering mortar is detected, and the specific data result of the detection is shown in Table 1.
Table 1: example 1 two-component gypsum-based plastering mortar performance detection concrete data
As can be seen from Table 1, compared with the requirements specified by the national standard, the flexural strength of the product of the embodiment is improved by 2.8MPa, the compressive strength is improved by 14.2 MPa, and the tensile bonding strength is improved by 0.55 MPa.
Example 2
In the two-component gypsum-based plastering mortar of the embodiment, the weight ratio of the component A cementing material to the component B aggregate gold tailing extra-fine sand is 1: 0.5;
the component A cementing material comprises the following raw materials in parts by weight: 9.9kg of phosphogypsum, additive: 0.015kg of hydroxypropyl methyl cellulose, 0.025kg of magnesium aluminum silicate, 0.025kg of protein gypsum retarder, 0.025kg of aluminum potassium sulfate and 0.010kg of emulsion powder; and the component B is 0.5kg of aggregate gold tailings extra-fine sand.
The preparation method, the using method and the performance detection method are the same as those of the example 1.
The product performance test data of this example are shown in Table 2 below.
Table 2: example 2 two-component gypsum-based plastering mortar performance detection concrete data
As can be seen from Table 2, compared with the requirements specified by the national standard, the product of the present embodiment has the advantages of improved flexural strength by 1.3MPa, improved compressive strength by 5.5 MPa and improved tensile bonding strength by 0.30 MPa.
Example 3
In the two-component gypsum-based plastering mortar of the embodiment, the weight ratio of the component A cementing material to the component B aggregate gold tailing extra-fine sand is 1: 1.5;
the component A cementing material comprises the following components in parts by weight: 9.8kg of phosphogypsum, additive: 0.035kg of hydroxypropyl methyl cellulose, 0.040kg of magnesium aluminum silicate, 0.050kg of protein gypsum retarder, 0.035g of aluminum potassium sulfate and 0.040kg of emulsion powder; and the aggregate B component is 15kg of tungsten tailing extra-fine sand.
The product performance test data of this example are shown in Table 3 below.
Table 3: example 3 two-component Gypsum-based plastering mortar Performance test concrete data
As can be seen from Table 3, compared with the requirements specified by the national standard, the flexural strength of the product of the embodiment is improved by 1.1MPa, the compressive strength is improved by 2.8MPa, and the tensile bonding strength is improved by 0.43 MPa.
The above-mentioned examples are only preferred embodiments of the present invention, and the scope of the claims of the present patent application is not limited thereto. The invention is not limited to the embodiments described above, but rather, the invention may be modified in various ways.
Claims (10)
1. The bi-component gypsum-based plastering mortar is characterized by consisting of a component A cementing material and a component B aggregate; the main component of the cementing material of the component A is industrial by-product gypsum, and the admixture comprises hydroxypropyl methyl cellulose, magnesium aluminum silicate, protein gypsum retarder, aluminum potassium sulfate and emulsion powder; the aggregate of the component B is tailing extra fine sand.
2. The two-component gypsum-based plastering mortar of claim 1, wherein the component A cementing material comprises the following components in percentage by weight: 97-99% of industrial byproduct gypsum, 0.15-0.55% of hydroxypropyl methyl cellulose, 0.15-0.55% of magnesium aluminum silicate, 0.20-0.70% of protein gypsum retarding agent, 0.20-0.70% of aluminum potassium sulfate and 0.10-0.50% of latex powder; the weight percentage takes the total weight of the cementing material as a calculation reference; the weight ratio of the cementing material of the component A to the superfine sand of the aggregate tailings of the component B is 1: 0.3-2.
3. The two-component gypsum-based plastering mortar of claim 1 or 2, wherein the industrial by-product gypsum is hemihydrate gypsum or/and anhydrite.
4. The two-component gypsum-based plastering mortar of claim 3, wherein the hemihydrate gypsum or anhydrite is desulfurized gypsum or phosphogypsum.
5. The two-component gypsum-based plastering mortar of claim 1 or 2, wherein the particle size of the B-component aggregate tailing ultrafine sand is 60 to 800 mesh.
6. The two-component gypsum-based plastering mortar of claim 3, wherein the particle size of the B-component aggregate tailing ultrafine sand is 60 to 800 meshes.
7. The two-component gypsum-based plastering mortar of claim 4, wherein the particle size of the B-component aggregate tailing ultrafine sand is 60 to 800 meshes.
8. The two-component gypsum-based plastering mortar of claim 1 or 2, wherein the tailing extra fine sand has a water content of 10% or less, preferably 5% or less.
9. The two-component gypsum-based plastering mortar of any of claims 1 to 8, wherein the ultrafine sand of the B-component aggregate tailings has a mud content of 3% or less, preferably 2% or less.
10. A process for the preparation of a two-component gypsum-based plastering mortar as claimed in any of claims 1 to 9, wherein the a-component cementitious material is prepared by the steps of: adding additives of hydroxypropyl methylcellulose, magnesium aluminum silicate and protein gypsum retarder into industrial by-product gypsum, stirring, mixing and homogenizing, and then metering and packaging to obtain a component A cementing material;
the preparation steps of the aggregate of the component B are as follows: the chemical and mineral composition analysis is carried out on the tailing extra-fine sand, the heavy metal in the tailing extra-fine sand is recycled and passivated, the toxic and harmful mineral dressing additive is removed, the medium and trace elements in the metal tailings are converted from activity to stabilization form, then the dehydration treatment is carried out, and finally the metering and packaging are carried out.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560083A (en) * | 2009-06-02 | 2009-10-21 | 河北科技大学 | Dry powder mortar of mine tailings |
| CN102731047A (en) * | 2012-06-11 | 2012-10-17 | 西南科技大学 | Self-leveling mortar material with phosphogypsum as filling material, and preparation method thereof |
| CN106220115A (en) * | 2016-07-19 | 2016-12-14 | 北京建筑材料科学研究总院有限公司 | Utilize gypsum base gravity flowing levelling mortar prepared by iron tailings fine sand and preparation method thereof |
| CN106800401A (en) * | 2017-01-13 | 2017-06-06 | 河北睿索固废工程技术研究院有限公司 | A kind of gypsum based self-leveling mortar using molybdic tailing as filler |
| CN109809785A (en) * | 2019-04-02 | 2019-05-28 | 南京益夫新材料科技有限公司 | A kind of lightweight scratch coat gypsum mortar and preparation method |
| CN110156422A (en) * | 2019-06-20 | 2019-08-23 | 诸暨市兆山天峰干混砂浆有限公司 | Gypsum plastering mortar and its construction technology suitable for machine sprayization spraying application |
-
2020
- 2020-10-23 CN CN202011144488.7A patent/CN114477934B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560083A (en) * | 2009-06-02 | 2009-10-21 | 河北科技大学 | Dry powder mortar of mine tailings |
| CN102731047A (en) * | 2012-06-11 | 2012-10-17 | 西南科技大学 | Self-leveling mortar material with phosphogypsum as filling material, and preparation method thereof |
| CN106220115A (en) * | 2016-07-19 | 2016-12-14 | 北京建筑材料科学研究总院有限公司 | Utilize gypsum base gravity flowing levelling mortar prepared by iron tailings fine sand and preparation method thereof |
| CN106800401A (en) * | 2017-01-13 | 2017-06-06 | 河北睿索固废工程技术研究院有限公司 | A kind of gypsum based self-leveling mortar using molybdic tailing as filler |
| CN109809785A (en) * | 2019-04-02 | 2019-05-28 | 南京益夫新材料科技有限公司 | A kind of lightweight scratch coat gypsum mortar and preparation method |
| CN110156422A (en) * | 2019-06-20 | 2019-08-23 | 诸暨市兆山天峰干混砂浆有限公司 | Gypsum plastering mortar and its construction technology suitable for machine sprayization spraying application |
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