CN114773927A - Gypsum-based steel structure fireproof coating interface agent and preparation method thereof - Google Patents
Gypsum-based steel structure fireproof coating interface agent and preparation method thereof Download PDFInfo
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- CN114773927A CN114773927A CN202210295606.7A CN202210295606A CN114773927A CN 114773927 A CN114773927 A CN 114773927A CN 202210295606 A CN202210295606 A CN 202210295606A CN 114773927 A CN114773927 A CN 114773927A
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- Prior art keywords
- gypsum
- steel structure
- fireproof coating
- based steel
- interface agent
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
Abstract
The invention discloses a gypsum-based steel structure fireproof coating interface agent and a preparation method thereof. The gypsum-based steel structure fireproof coating interface agent comprises the following raw materials in parts by weight: 10-45 parts of redispersible latex powder, 0-35 parts of silicon micropowder, 4-22 parts of gypsum and 0.1-0.5 part of powdery defoaming agent. According to the invention, a flexible interface layer is formed between the surface of the steel structure and the gypsum-based steel structure fireproof coating, the interface agent has good binding force with steel and gypsum, the interface agent has good ductility at normal temperature after film forming, and the bonding performance of the gypsum-based thick fireproof coating can be improved by relaxing stress.
Description
Technical Field
The invention relates to the technical field of building construction materials, in particular to a gypsum-based steel structure fireproof coating interface agent and a preparation method thereof.
Background
In a steel structure fabricated building, a steel pipe bundle combined residential system is widely applied, a basic vertical component of the structure is a steel pipe bundle combined shear wall, and a large-area steel structure surface of the structure needs to be fireproof.
The gypsum-based thick steel structure fireproof coating is coated on the inner wall of the steel tube bundle combined shear wall, so that the fireproof heat insulation and the wall surface leveling are completed together. Because the performance difference between the gypsum and the steel is very large, interface stress is generated on the interface of the gypsum and the steel by dry-wet circulation and cold-hot circulation in long-term use, so that the coating is caused to fall off and bulge.
Chinese patent CN209941941U discloses a fire protection device for steel structural members, which improves the bonding strength by disposing an interface layer between the steel structural member and the fire protection layer, and reduces cracks and falling, but the improvement of the bonding strength is still limited, and a metal mesh still needs to be added.
Disclosure of Invention
The invention aims to overcome the technical defects, provides the gypsum-based steel structure fireproof coating interface agent and the preparation method thereof, and solves the technical problems that the gypsum-based fireproof coating coated on the surface of steel in the prior art is easy to fall off and hollows.
The invention provides a gypsum-based steel structure fireproof coating interface agent, which comprises the following raw materials in parts by weight: 10-45 parts of redispersible latex powder, 0-35 parts of silicon micropowder, 4-22 parts of gypsum and 0.1-0.5 part of powdery defoaming agent.
The second aspect of the invention provides a preparation method of a gypsum-based steel structure fireproof coating interface agent, which comprises the following steps:
the redispersible latex powder, the silica micropowder, the gypsum and the powdery defoaming agent are uniformly mixed according to a proportion to obtain the gypsum-based steel structure fireproof coating interface agent.
The third aspect of the invention provides a construction method of a gypsum-based steel structure fireproof coating interface agent, which comprises the following steps:
stirring the interfacial agent and water uniformly, standing for 5-10 min, and then stirring uniformly again to form slurry;
and sequentially coating the slurry and the gypsum-based steel structure fireproof coating on the surface of the steel product and naturally curing.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a flexible interface layer is formed between the surface of the steel structure and the gypsum-based steel structure fireproof coating, the interface agent has good binding force with steel and gypsum, the interface agent has good ductility at normal temperature after film forming, and the bonding performance of the gypsum-based thick fireproof coating can be improved by relaxing stress.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a gypsum-based steel structure fireproof coating interface agent, which comprises the following raw materials in parts by weight: 10-45 parts of redispersible latex powder, 0-35 parts of silicon micro powder, 4-22 parts of gypsum and 0.1-0.5 part of powdery defoaming agent. Wherein, the redispersible latex powder is used as a main film forming substance to form a flexible adhesive layer; the gypsum is a basic component of the gypsum-based steel structure fireproof coating and is used for further improving the combination of the fireproof layer and the interface layer; the silicon micro powder is used as a filler, and is acted with the redispersible latex powder and the gypsum to obviously improve the bonding property; the defoaming agent is used for eliminating a large amount of bubbles generated in the process of mixing the interfacial agent with water.
The gypsum-based steel structure fireproof coating interface agent is prepared by adding water into redispersible latex powder, silica micropowder, gypsum and a powdery defoaming agent to prepare slurry, coating the slurry on the inner wall surface of a steel structure shear wall to form a flexible interface, and coating the gypsum-based thick fireproof coating on the flexible interface; the interface agent has good ductility at normal temperature after film forming, can relax stress generated by dry-wet cycle and temperature change, and ensures good adhesion of the fireproof coating and the surface of a steel structure.
In the invention, the gypsum-based steel structure fireproof coating interface agent comprises the following raw materials in parts by weight: 20-35 parts of redispersible latex powder, 10-25 parts of silicon micropowder, 11-16 parts of gypsum and 0.1-0.5 part of powdery defoaming agent. Further, the mass ratio of the redispersible emulsion powder to the silica micropowder is (1-3): 1, and further 3: 1.
In the present invention, the redispersible emulsion powder is a vinyl acetate-ethylene copolymer (VAE) redispersible emulsion powder.
In the invention, the gypsum is beta-hemihydrate gypsum. In the invention, the beta-hemihydrate gypsum is prepared by dehydrating phosphogypsum.
In the present invention, the powdery defoaming agent is polyether polyol fixed on an inorganic carrier. The polyether polyol fixed on the inorganic carrier is selected as the powdery defoaming agent, so that the powdery defoaming agent is favorably and uniformly mixed with the rest components.
The composition of the gypsum-based steel structure fireproof coating is not limited, and can be selected by a person skilled in the art according to actual conditions. In some embodiments of the present invention, the gypsum-based steel structure fire retardant coating has a gypsum content of 50% or more.
The invention provides a preparation method of a gypsum-based steel structure fireproof coating interface agent, which comprises the following steps:
the redispersible latex powder, the silica micropowder, the gypsum and the powdery defoamer are uniformly mixed according to the proportion to obtain the gypsum-based steel structure fireproof coating interface agent.
The third aspect of the invention provides a construction method of a gypsum-based steel structure fireproof coating interface agent, which comprises the following steps:
stirring the interfacial agent and water uniformly, standing for 5-10 min, and then stirring uniformly again to form slurry;
and sequentially coating the slurry and the gypsum-based steel structure fireproof coating on the surface of the steel product and naturally curing.
In the invention, the mass ratio of the interfacial agent to water is 1: (0.7-0.9).
In the invention, the thickness of the slurry sprayed or brushed on the steel surface is 0.5-5 mm, further 0.5-2 mm, and further 1 mm.
In the invention, the slurry is used within 4 hours.
Example 1
(1) Uniformly mixing 33kg of redispersible latex powder, 11kg of silica micropowder, 11kg of beta-semi-hydrated gypsum and 0.28kg of powdery defoaming agent to obtain the gypsum-based steel structure fireproof coating interface agent;
(2) adding the interfacial agent and 45kg of water into a mixer, uniformly mixing, standing for 5 minutes, and stirring again to obtain uniform slurry for use;
(3) 3 pieces of 100X 5mm steel plates were selected, and 1mm thick interface agent and then 30mm thick gypsum-based fire retardant coating were applied to the steel plates, followed by natural curing at room temperature to obtain sample A1.
Comparative example 1
3 steel plates with the thickness of 100 multiplied by 5mm are selected, gypsum-based fireproof paint with the thickness of 30mm is directly coated on the steel plates, and the sample B1 is obtained by natural curing at room temperature.
Examples 2 to 6 and comparative examples 2 to 4
Examples 2 to 6 and comparative examples 2 to 4 are different from example 1 only in that the addition amount of each component of the interfacial agent is different; referring to the method of example 1, the samples formed with the interfacial agents of examples 2-6 were, in order, sample a2, sample A3, sample a4, sample a5, and sample a 6; the samples formed by the interfacial agents of comparative examples 2-4 were, in order, sample B2, sample B3, and sample B4. The compositions of the interfacial agents of examples 1 to 6 and comparative examples 2 to 4 are shown in Table 1.
TABLE 1
Test group
Test one: drying the sample in a 65 ℃ (± 5) air drying oven to constant weight, performing a tensile test, measuring the bonding strength, and observing the fracture characteristics;
and (2) test II: drying the sample in a 65 ℃ (+ -5) blast drying box to constant weight, taking out the sample, and putting the sample into a concrete standard curing box with the temperature of 20 +/-2 ℃ and the relative humidity of 95% for 7 hours as a cycle; after 100 cycles, a tensile test was performed, the adhesion strength was measured, and the fracture characteristics were observed.
TABLE 2
As can be seen from Table 2, in the presence of the interface agent (except for sample B3), the bonding strength of the fireproof coating and the steel plate is greater than the tensile strength of the fireproof coating per se through the samples subjected to dry-wet cycle and cold-heat cycle, and the fracture surface occurs in the middle of the fireproof coating; when no interface agent exists, the bonding strength of the fireproof coating and the steel plate is smaller than the tensile strength of the fireproof coating per se through a sample subjected to dry-wet cycle and cold-hot cycle, and a fracture surface occurs on the bonding surface of the fireproof coating and the steel plate.
Meanwhile, as can be seen from table 2, the ratio of the redispersible latex powder, the silica micropowder and the beta-hemihydrate gypsum has a great influence on the performance of the interfacial agent, and the ratio of the raw materials needs to be strictly controlled in order to obtain the interfacial agent with better effect.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The gypsum-based steel structure fireproof coating interface agent is characterized by comprising the following raw materials in parts by weight: 10-45 parts of redispersible latex powder, 0-35 parts of silicon micro powder, 4-22 parts of gypsum and 0.1-0.5 part of powdery defoaming agent.
2. The gypsum-based steel structure fire retardant coating interface agent according to claim 1, wherein the gypsum-based steel structure fire retardant coating interface agent comprises the following raw materials in parts by weight: 20-35 parts of redispersible latex powder, 10-25 parts of silicon micropowder, 11-16 parts of gypsum and 0.1-0.5 part of powdery defoaming agent.
3. The gypsum-based steel structure fireproof coating interface agent as claimed in claim 1, wherein the mass ratio of the redispersible latex powder to the silica micropowder is (1-3): 1.
4. The gypsum-based steel structure fireproof coating interface agent according to claim 1, wherein the mass ratio of the redispersible latex powder to the silica micro powder is 3: 1.
5. The gypsum-based steel structure fireproof coating interface agent according to claim 1, wherein the redispersible latex powder is VAE redispersible latex powder.
6. The gypsum-based steel structure fire retardant coating interfacial agent according to claim 1, wherein said gypsum is β -hemihydrate gypsum.
7. The gypsum-based steel structure fire retardant coating interfacial agent according to claim 1, wherein said powdery antifoaming agent is polyether polyol fixed on an inorganic carrier.
8. A preparation method of the gypsum-based steel structure fireproof coating interface agent according to any one of claims 1 to 7, characterized by comprising the following steps:
the redispersible latex powder, the silica micropowder, the gypsum and the powdery defoamer are uniformly mixed according to the proportion to obtain the gypsum-based steel structure fireproof coating interface agent.
9. A construction method of the gypsum-based steel structure fireproof coating interface agent according to any one of claims 1 to 7, characterized by comprising the following steps:
uniformly stirring the interfacial agent and water, standing for 5-10 min, and then uniformly stirring again to form slurry;
and sequentially coating the slurry and the gypsum-based steel structure fireproof coating on the surface of the steel product and naturally curing.
10. The construction method of the gypsum-based steel structure fireproof coating interface agent according to claim 9, wherein the mass ratio of the interface agent to water is 1: (0.7-0.9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295606.7A CN114773927A (en) | 2022-03-24 | 2022-03-24 | Gypsum-based steel structure fireproof coating interface agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210295606.7A CN114773927A (en) | 2022-03-24 | 2022-03-24 | Gypsum-based steel structure fireproof coating interface agent and preparation method thereof |
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| CN114773927A true CN114773927A (en) | 2022-07-22 |
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| CN202210295606.7A Pending CN114773927A (en) | 2022-03-24 | 2022-03-24 | Gypsum-based steel structure fireproof coating interface agent and preparation method thereof |
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Citations (5)
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| CN107936671A (en) * | 2017-12-27 | 2018-04-20 | 北京宝辰联合科技股份有限公司 | A kind of gypsum base putty |
| CN108585714A (en) * | 2018-06-21 | 2018-09-28 | 同济大学 | It is a kind of using ardealite base hydraulicity composite gel material as the boundary mortar of agglutination material |
| CN108609967A (en) * | 2018-07-27 | 2018-10-02 | 上海恪耐新材料科技有限公司 | A kind of steel member boundary mortar and application process |
| CN108751844A (en) * | 2018-06-14 | 2018-11-06 | 杭萧钢构股份有限公司 | A kind of steel construction interior wall interfacial agents with corrosion-inhibiting coating |
| CN109020370A (en) * | 2018-08-14 | 2018-12-18 | 杭萧钢构股份有限公司 | A kind of steel construction exterior wall boundary mortar with corrosion-inhibiting coating |
-
2022
- 2022-03-24 CN CN202210295606.7A patent/CN114773927A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107936671A (en) * | 2017-12-27 | 2018-04-20 | 北京宝辰联合科技股份有限公司 | A kind of gypsum base putty |
| CN108751844A (en) * | 2018-06-14 | 2018-11-06 | 杭萧钢构股份有限公司 | A kind of steel construction interior wall interfacial agents with corrosion-inhibiting coating |
| CN108585714A (en) * | 2018-06-21 | 2018-09-28 | 同济大学 | It is a kind of using ardealite base hydraulicity composite gel material as the boundary mortar of agglutination material |
| CN108609967A (en) * | 2018-07-27 | 2018-10-02 | 上海恪耐新材料科技有限公司 | A kind of steel member boundary mortar and application process |
| CN109020370A (en) * | 2018-08-14 | 2018-12-18 | 杭萧钢构股份有限公司 | A kind of steel construction exterior wall boundary mortar with corrosion-inhibiting coating |
Non-Patent Citations (2)
| Title |
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| 赵云龙等: "《石膏应用技术问答》", 30 September 2016, 中国建材工业出版社 * |
| 马国伟等: "《水泥基材料3D打印关键技术》", 31 May 2020, 中国建材工业出版社 * |
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