CN111393122B - Phosphogypsum mortar for load-bearing structure and preparation method thereof - Google Patents
Phosphogypsum mortar for load-bearing structure and preparation method thereof Download PDFInfo
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- CN111393122B CN111393122B CN202010116017.9A CN202010116017A CN111393122B CN 111393122 B CN111393122 B CN 111393122B CN 202010116017 A CN202010116017 A CN 202010116017A CN 111393122 B CN111393122 B CN 111393122B
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- phosphogypsum
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- gypsum
- bearing structure
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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
- C04B28/143—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
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses phosphogypsum mortar for a load-bearing structure and a preparation method thereof, wherein the phosphogypsum mortar for the load-bearing structure comprises the following components of phosphogypsum, mineral powder, lime calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, calcium sulphoaluminate, sodium oxalate, dihydrate gypsum and polypropylene short fibers, and the preparation method comprises the following steps: mixing calcium sulphoaluminate, sodium oxalate and dihydrate gypsum, and carrying out mixing grinding to obtain a mixture; uniformly mixing the phosphogypsum, mineral powder, ash calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, polypropylene short fibers and the mixture, adding water and uniformly stirring to obtain the phosphogypsum mortar for the load-bearing structure. Through the mode, the raw materials are convenient to obtain, the components coordinate, the physical performance is good after compounding, the manufacturing method is simple, excessive operation skills are not needed, and the application range is wide.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to phosphogypsum mortar for a load-bearing structure and a preparation method thereof.
Background
Phosphogypsum refers to solid waste residue generated when phosphorite is treated by sulfuric acid in phosphoric acid production, and the main component of the phosphogypsum is calcium sulfate and also contains various other impurities. The annual output of phosphogypsum in China is 7500 million tons, the accumulated output is nearly hundred million tons, the phosphogypsum is one of the gypsum waste residues with the largest output, and the discharged phosphogypsum slag occupies a large amount of land, forms slag hills and seriously pollutes the environment. In order to realize the reutilization of the industrial waste residue phosphogypsum, the phosphogypsum can be prepared into phosphogypsum mortar for application. The phosphogypsum mortar in the market is mainly used for non-bearing structures such as gypsum boards, partition boards, plastering mortar and the like, the material can replace C15 concrete to be used as beams, columns, floor slabs and the like, but the phosphogypsum mortar for the bearing structures does not appear yet.
Disclosure of Invention
The invention mainly solves the technical problem of providing the phosphogypsum mortar for the load-bearing structure and the preparation method thereof, and the application effect is good.
In order to solve the technical problems, the invention adopts a technical scheme that: the phosphogypsum mortar for the load-bearing structure comprises the following components of phosphogypsum, mineral powder, lime calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, calcium sulphoaluminate, sodium oxalate, dihydrate gypsum and polypropylene short fibers, wherein the content of each component of the phosphogypsum mortar for the load-bearing structure is as follows: 85-95 parts of phosphogypsum, 3-7 parts of mineral powder, 3-7 parts of ash calcium, 0.01-0.2 part of gypsum retarder, 0.01-0.1 part of defoaming agent, 0.05-0.2 part of polycarboxylic acid water reducing agent, 0.01-0.1 part of calcium sulphoaluminate, 0.01-0.1 part of sodium oxalate, 0.05-0.2 part of dihydrate gypsum and 0.1-1 part of polypropylene short fiber.
In a preferred embodiment of the invention, the content of each component of the phosphogypsum mortar for the load-bearing structure is as follows: the composite material comprises, by weight, 90 parts of phosphogypsum, 5 parts of mineral powder, 5 parts of ash calcium, 0.1 part of gypsum retarder, 0.05 part of defoaming agent, 0.1 part of polycarboxylate superplasticizer, 0.02 part of calcium sulphoaluminate, 0.05 part of sodium oxalate, 0.1 part of dihydrate gypsum and 0.5 part of polypropylene short fiber.
In a preferred embodiment of the invention, the defoamer is a gypsum-specific defoamer.
In a preferred embodiment of the invention, the polypropylene staple fibers have a length of 2 to 5 mm.
The preparation method of the ardealite mortar for the load-bearing structure comprises the following steps: (1) mixing calcium sulphoaluminate, sodium oxalate and dihydrate gypsum, and carrying out mixed grinding to obtain a first mixture; (2) uniformly mixing the phosphogypsum, mineral powder, ash calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, polypropylene short fibers and the first mixture obtained in the step (1) to obtain a second mixture, adding water and uniformly stirring to obtain the phosphogypsum mortar for the load-bearing structure.
In a preferred embodiment of the present invention, the mixing and milling in step (1) is performed in a high-speed ball mill.
In a preferred embodiment of the present invention, the mesh number of the mixture in the step (1) is 6000 mesh or more.
In a preferred embodiment of the present invention, the mass ratio of the water to the second mixture in step (2) is 1: 2.
The invention has the beneficial effects that: the phosphogypsum mortar for the load-bearing structure and the preparation method thereof have the advantages of convenient raw material source, coordinated action of all components, good physical properties after compounding, simple preparation method, no need of excessive operating skills and wide application range.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the phosphogypsum mortar for the load-bearing structure comprises the following components of phosphogypsum, mineral powder, lime calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, calcium sulphoaluminate, sodium oxalate, dihydrate gypsum and polypropylene short fibers, wherein the content of each component of the phosphogypsum mortar for the load-bearing structure is as follows: the composite material comprises, by weight, 90 parts of phosphogypsum, 5 parts of mineral powder, 5 parts of ash calcium, 0.1 part of gypsum retarder, 0.05 part of defoaming agent, 0.1 part of polycarboxylate superplasticizer, 0.02 part of calcium sulphoaluminate, 0.05 part of sodium oxalate, 0.1 part of dihydrate gypsum and 0.5 part of polypropylene short fiber. The defoaming agent is a special defoaming agent for gypsum, and the length of the polypropylene short fiber is 3 mm.
The preparation method of the ardealite mortar for the load-bearing structure comprises the following steps:
(1) weighing raw materials, mixing calcium sulphoaluminate, sodium oxalate and dihydrate gypsum, and performing mixed grinding by adopting a high-speed ball mill to enable the mesh number to reach more than 6000 meshes to obtain a first mixture;
(2) uniformly mixing phosphogypsum, mineral powder, ash calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, polypropylene short fibers and the first mixture obtained in the step (1) to obtain a second mixture, adding half of water by weight of the second mixture, and uniformly stirring to obtain the phosphogypsum mortar for the load-bearing structure.
The obtained phosphogypsum mortar for the load-bearing structure is subjected to physical property test, and the test result is as follows: breaking strength: greater than 6 MPa; compressive strength: greater than 25 Mpa; coefficient of thermal conductivity: less than 0.02; softening coefficient: greater than 0.95; tensile strength: greater than 1.5Mpa, tensile strength: greater than 5 MPa.
Example two:
the phosphogypsum mortar for the load-bearing structure comprises the following components of phosphogypsum, mineral powder, lime calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, calcium sulphoaluminate, sodium oxalate, dihydrate gypsum and polypropylene short fibers, wherein the content of each component of the phosphogypsum mortar for the load-bearing structure is as follows: 85 parts of phosphogypsum, 3 parts of mineral powder, 3 parts of ash calcium, 0.2 part of gypsum retarder, 0.01 part of defoaming agent, 0.2 part of polycarboxylate superplasticizer, 0.01 part of calcium sulphoaluminate, 0.1 part of sodium oxalate, 0.05 part of dihydrate gypsum and 0.1 part of polypropylene short fiber. The defoaming agent is a special defoaming agent for gypsum, and the length of the polypropylene short fiber is 2 mm.
The preparation method of the ardealite mortar for the load-bearing structure comprises the following steps:
(1) weighing raw materials, mixing calcium sulphoaluminate, sodium oxalate and dihydrate gypsum, and performing mixed grinding by adopting a high-speed ball mill to enable the mesh number to reach more than 6000 meshes to obtain a first mixture;
(2) uniformly mixing phosphogypsum, mineral powder, ash calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, polypropylene short fibers and the first mixture obtained in the step (1) to obtain a second mixture, adding half of water by weight of the second mixture, and uniformly stirring to obtain the phosphogypsum mortar for the load-bearing structure.
The obtained phosphogypsum mortar for the load-bearing structure is subjected to physical property test, and the test result is as follows: breaking strength: greater than 6 MPa; compressive strength: greater than 24 MPa; coefficient of thermal conductivity: less than 0.02; softening coefficient: greater than 0.95; tensile strength: greater than 1.3Mpa, tensile strength: greater than 4 MPa.
Example three:
the phosphogypsum mortar for the load-bearing structure comprises the following components of phosphogypsum, mineral powder, lime calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, calcium sulphoaluminate, sodium oxalate, dihydrate gypsum and polypropylene short fibers, wherein the content of each component of the phosphogypsum mortar for the load-bearing structure is as follows: 95 parts of phosphogypsum, 7 parts of mineral powder, 7 parts of ash calcium, 0.01 part of gypsum retarder, 0.1 part of defoaming agent, 0.05 part of polycarboxylate superplasticizer, 0.1 part of calcium sulphoaluminate, 0.01 part of sodium oxalate, 0.2 part of dihydrate gypsum and 1 part of polypropylene short fiber. The defoaming agent is a special defoaming agent for gypsum, and the length of the polypropylene short fiber is 4 mm.
The preparation method of the ardealite mortar for the load-bearing structure comprises the following steps:
(1) weighing raw materials, mixing calcium sulphoaluminate, sodium oxalate and dihydrate gypsum, and performing mixed grinding by adopting a high-speed ball mill to enable the mesh number to reach more than 6000 meshes to obtain a first mixture;
(2) uniformly mixing phosphogypsum, mineral powder, ash calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, polypropylene short fibers and the first mixture obtained in the step (1) to obtain a second mixture, adding half of water by weight of the second mixture, and uniformly stirring to obtain the phosphogypsum mortar for the load-bearing structure.
The obtained phosphogypsum mortar for the load-bearing structure is subjected to physical property test, and the test result is as follows: breaking strength: greater than 5 MPa; compressive strength: greater than 24 MPa; coefficient of thermal conductivity: less than 0.02; softening coefficient: greater than 0.94; tensile strength: greater than 1.4Mpa, tensile strength: greater than 4 MPa.
The invention has the beneficial effects that:
firstly, the ardealite mortar for the load-bearing structure is convenient in raw material source, the components coordinate, and the physical performance is good after compounding;
secondly, the preparation method of the ardealite mortar for the load-bearing structure is simple in manufacturing method, free of excessive operation skills and wide in application range.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The phosphogypsum mortar for the load-bearing structure is characterized by comprising the following components of phosphogypsum, mineral powder, ash calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, calcium sulphoaluminate, sodium oxalate, dihydrate gypsum and polypropylene short fibers, wherein the content of each component of the phosphogypsum mortar for the load-bearing structure is as follows: the composite material comprises, by weight, 90 parts of phosphogypsum, 5 parts of mineral powder, 5 parts of ash calcium, 0.1 part of gypsum retarder, 0.05 part of defoaming agent, 0.1 part of polycarboxylate superplasticizer, 0.02 part of calcium sulphoaluminate, 0.05 part of sodium oxalate, 0.1 part of dihydrate gypsum and 0.5 part of polypropylene short fiber.
2. The phosphogypsum mortar for load-bearing structures according to claim 1, characterized in that the defoamer is a defoamer specific for gypsum.
3. The phosphogypsum mortar for load-bearing structures according to claim 1, characterized in that the polypropylene short fibers have a length of 2-5 mm.
4. The process for the preparation of phosphogypsum mortar for load-bearing structures according to claim 1, characterized by comprising the steps of: (1) mixing calcium sulphoaluminate, sodium oxalate and dihydrate gypsum, and carrying out mixed grinding to obtain a first mixture; (2) uniformly mixing the phosphogypsum, mineral powder, ash calcium, a gypsum retarder, a defoaming agent, a polycarboxylic acid water reducing agent, polypropylene short fibers and the first mixture obtained in the step (1) to obtain a second mixture, adding water and uniformly stirring to obtain the phosphogypsum mortar for the load-bearing structure.
5. The process for the preparation of phosphogypsum mortar for load-bearing structures according to claim 4, characterized in that the mixed grinding in step (1) is carried out in a high-speed ball mill.
6. The method for preparing phosphogypsum mortar for load-bearing structures according to claim 4, wherein the mesh number of the mixture in step (1) is 6000 mesh or more.
7. The process for the preparation of phosphogypsum mortar for load-bearing structures according to claim 4, characterized in that the mass ratio of water to the second mixture in step (2) is 1: 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010116017.9A CN111393122B (en) | 2020-02-25 | 2020-02-25 | Phosphogypsum mortar for load-bearing structure and preparation method thereof |
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| CN202010116017.9A CN111393122B (en) | 2020-02-25 | 2020-02-25 | Phosphogypsum mortar for load-bearing structure and preparation method thereof |
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| CN111393122A CN111393122A (en) | 2020-07-10 |
| CN111393122B true CN111393122B (en) | 2022-02-08 |
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| CN112552001A (en) * | 2020-12-07 | 2021-03-26 | 绵竹市铸诚混凝土有限公司 | Phosphogypsum mortar for load-bearing structure and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4540439A (en) * | 1981-05-06 | 1985-09-10 | Chemische Werke Huls Aktiengesellschaft | Process for preparation of gypsum shapes |
| CN105152620A (en) * | 2015-10-26 | 2015-12-16 | 贵州腾峰科技有限责任公司 | Ardealite premixed dry-mixed mortar capable of being used for 3D printing |
| CN106904922A (en) * | 2017-02-18 | 2017-06-30 | 四川华邦保和涂料有限公司 | A kind of preparation method of ardealite base exterior wall internal insulation anticracking grout |
| CN108341640A (en) * | 2018-04-12 | 2018-07-31 | 江苏兆佳建材科技有限公司 | A kind of early-strength gypsum base thick-layer leveling mortar |
| CN108467246A (en) * | 2018-03-30 | 2018-08-31 | 上海恪耐新材料科技有限公司 | Mortar is built in a kind of spray of fire-retardant type thermal insulation sound-insulation wall |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100547953B1 (en) * | 2003-03-12 | 2006-02-02 | 안기주 | Non-combustible, heat insulation, heat insulation, absorption. Foamed concrete mortar composition with sound insulation function and method for producing same |
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2020
- 2020-02-25 CN CN202010116017.9A patent/CN111393122B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4540439A (en) * | 1981-05-06 | 1985-09-10 | Chemische Werke Huls Aktiengesellschaft | Process for preparation of gypsum shapes |
| CN105152620A (en) * | 2015-10-26 | 2015-12-16 | 贵州腾峰科技有限责任公司 | Ardealite premixed dry-mixed mortar capable of being used for 3D printing |
| CN106904922A (en) * | 2017-02-18 | 2017-06-30 | 四川华邦保和涂料有限公司 | A kind of preparation method of ardealite base exterior wall internal insulation anticracking grout |
| CN108467246A (en) * | 2018-03-30 | 2018-08-31 | 上海恪耐新材料科技有限公司 | Mortar is built in a kind of spray of fire-retardant type thermal insulation sound-insulation wall |
| CN108341640A (en) * | 2018-04-12 | 2018-07-31 | 江苏兆佳建材科技有限公司 | A kind of early-strength gypsum base thick-layer leveling mortar |
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