CN114316640A - Anhydrite-based indoor micro-expansion type steel structure fireproof coating and preparation method thereof - Google Patents
Anhydrite-based indoor micro-expansion type steel structure fireproof coating and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of new gypsum materials, and discloses an anhydrite-based indoor micro-expansion type steel structure fireproof coating and a preparation method thereof. The anhydrite-based indoor non-intumescent steel structure fireproof coating has good performances of moisture resistance, heat insulation, fire prevention and strong bonding force, and the crack resistance and hollowness resistance of the anhydrite after spraying are excellent due to the micro-expansion performance of the anhydrite after hydration, so that the problems of hollowness and cracking of the cement-based and magnesium hydroxide-based fireproof coatings caused by cement shrinkage after spraying are fundamentally solved, and the anhydrite-based indoor non-intumescent steel structure fireproof coating has excellent market competitiveness.
Description
Technical Field
The invention relates to the technical field of new gypsum materials, in particular to anhydrite-based indoor micro-expansion type steel structure fireproof coating and a preparation method thereof.
Background
The steel is a non-combustible building material, and has the characteristics of earthquake resistance, bending resistance and the like. In practical application, the steel can relatively increase the load capacity of a building and meet the requirement of aesthetic appearance of the building design; and the defects that building materials such as concrete and the like cannot be bent and stretched are also avoided. Therefore, the steel is favored by the construction industry and is generally adopted in the commercial and residential buildings. However, steel as a building material has a drawback in fire-proof function, and its mechanical properties such as yield point, tensile strength and elastic modulus are all rapidly decreased by the increase of temperature.
In recent years, high-rise steel structure buildings are increasing, and particularly steel structure materials are more widely adopted in some super high-rise buildings. Once a fire accident occurs to a high-rise building, the fire can not be extinguished in a short time, which requires that when building design, the fire protection of building materials is increased to enhance the fire endurance, and necessary emergency schemes are made in the building to reduce casualties and property loss. As steel structures are applied more and more widely, requirements on safety of the steel structures are stricter. On the basis of the technical standards of GB14907-1994, GB14907-2002 Steel Structure fireproof paint and the like, the national Emergency administration department proposes again in 2018, finishes the revision of GB 14907-2018 Steel Structure fireproof paint, and puts forward a clear requirement on the fireproof performance of steel of a steel structure of a building (structure).
At present, the indoor steel structure fireproof coating for domestic production mainly comprises inorganic fireproof coatings such as cement-based fireproof coating, magnesium hydroxide-based fireproof coating and the like. The fire-proof coatings have large self-drying shrinkage and large dry density, so that the conditions of hollowing and cracking which are commonly reflected in use are serious. Therefore, it is highly desirable to develop a high-performance fireproof coating with low density, micro-expansion, small thermal conductivity and good adhesion, so as to improve the fire resistance of the steel structure and the safety level of the building (structure).
Therefore, the anhydrite-based indoor micro-expansion type steel structure fireproof coating and the preparation method thereof are provided.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides an anhydrite-based indoor micro-expansion type steel structure fireproof coating and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme that the anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises fireproof coating, wherein the fireproof coating comprises anhydrite, cement, fly ash, metakaolin, an exciting agent, a pumping agent, a water-retaining agent, ceramic fiber, redispersible latex powder, vitrified micro bubbles and expanded vermiculite.
Preferably, the fireproof coating comprises the following raw materials in parts by weight: 65-70 parts of anhydrite, 10-12 parts of cement, 6-8 parts of fly ash, 3-4 parts of metakaolin, 3-4 parts of excitant, 0.05-0.1 part of pumping aid, 0.15-0.2 part of water-retaining agent, 0.1-0.35 part of ceramic fiber, 0.2-0.35 part of redispersible latex powder, 7-10 parts of vitrified micro bubbles and 4-6 parts of expanded vermiculite.
Preferably, the anhydrite is the anhydrite associated with the pyrite production process; after hydration, dihydrate gypsum crystals are formed, and when the dihydrate gypsum crystals meet fire at high temperature, crystal water can be released, so that fire heat is effectively prevented from spreading.
Preferably, the cement is silicate rotary kiln 425 II type cement.
Preferably, the fly ash is grade II fly ash produced by a thermal power plant.
Preferably, the metakaolin is a volcanic ash material with high activity formed by calcination, so that the corrosion resistance and the durability of the fireproof material are improved.
Preferably, the activator is one or a mixture of two or more of a sodium salt activator, a potassium salt activator and an aluminum salt activator, and the mixture ratio of the two or more are arbitrary.
Preferably, the water-retaining agent is one or a mixture of two or more of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose (HEMC) and lithium bentonite, and the mixture ratio of the two or more is arbitrary.
Preferably, the specific gravity of the expanded vermiculite is 130-180kg/m3It has excellent water absorption, sound insulation, heat insulation and fire resistance.
A preparation method of anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises the following steps:
the first step is as follows: grinding anhydrite to obtain anhydrite powder;
the second step is that: according to the weight ratio, 65-70 parts of anhydrite powder, 10-12 parts of cement, 6-8 parts of fly ash, 3-4 parts of metakaolin, 3-4 parts of excitant, 0.05-0.1 part of pumping aid, 0.15-0.2 part of water-retaining agent, 0.1-0.35 part of ceramic fiber, 0.2-0.35 part of redispersible latex powder, 7-10 parts of vitrified micro-beads and 4-6 parts of expanded vermiculite are respectively weighed;
the third step: pouring 3-4 parts of exciting agent, 0.05-0.1 part of pumping agent, 0.15-0.2 part of water-retaining agent, 0.1-0.35 part of ceramic fiber and 0.2-0.35 part of redispersible latex powder into a mixer to be mixed for more than 2 minutes in advance;
the fourth step: pouring 65-70 parts of anhydrite powder, 10-12 parts of cement, 6-8 parts of fly ash and 3-4 parts of metakaolin into a mixer, and mixing the materials with the premixed materials in the mixer for more than 3 minutes;
the fifth step: and (3) sequentially pouring 7-10 parts of vitrified micro bubbles and 4-6 parts of expanded vermiculite into the mixer, and uniformly mixing the vitrified micro bubbles and the mixed material obtained in the fourth step.
Advantageous effects
The invention provides an anhydrite-based indoor micro-expansion type steel structure fireproof coating and a preparation method thereof. The method has the following beneficial effects:
(1) the silicate 425 II type cement used can improve the early strength of slurry and shorten the drying time, the II-grade fly ash can increase the workability of the slurry, the metakaolin can improve the corrosion resistance and the durability of the fireproof material, the excitant can excite the activity of the anhydrite and improve the hydration rate of the anhydrite, the pumping agent can improve the pumping performance and the spraying workability of the slurry, the water retention agent can improve the water retention performance and the workability of the slurry, the expanded vermiculite can improve the heat insulation performance and the fire resistance of the material, the ceramic fiber has low thermal conductivity and low thermal capacity, the wind erosion resistance of the material can be improved, the crack resistance and the pumping performance of the slurry are improved, and the vitrified micro-beads can reduce the dry density of the material. Therefore, the anhydrite-based indoor non-expansion type steel structure fireproof coating has good performances of moisture resistance, heat insulation, fire prevention and strong bonding force, and the crack resistance and hollowness resistance of the sprayed anhydrite are excellent due to the micro-expansion performance of the anhydrite after hydration, so that the difficult problems of hollowness and cracking of the cement-based and magnesium hydroxide-based fireproof coatings caused by cement shrinkage after spraying are fundamentally solved, and the anhydrite-based indoor non-expansion type steel structure fireproof coating has excellent market competitiveness.
(2) The anhydrite-based indoor micro-expansion type steel structure fireproof coating and the preparation method thereof adopt the anhydrite associated in the pyrite production process as the main material to prepare the anhydrite-based indoor non-expansion type steel structure fireproof coating, do not need calcination treatment, only need physical powder and mixing, have simple preparation process, save energy, reduce pollution, fully embody the comprehensive utilization of resources and realize the deep processing of the associated gypsum resources.
(3) The anhydrite-based indoor micro-expansion type fireproof coating for the steel structure and the preparation method thereof are suitable for thick spraying of the surface of an indoor steel structure, and when the anhydrite-based indoor micro-expansion type fireproof coating is used on site, water is added into the anhydrite-based indoor non-expansion type fireproof coating for the steel structure, the anhydrite-based indoor non-expansion type fireproof coating is uniformly stirred only by using the mixing water consumption with the water-cement ratio of 0.45-0.50, and the wall surface can be directly sprayed without coating an interface agent.
(4) The anhydrite-based indoor micro-expansion type steel structure fireproof coating and the preparation method thereof have the advantages that the anhydrite-based indoor non-expansion type steel structure fireproof coating in the first embodiment is fast in setting and hardening, short in surface drying time and less than or equal to 2 hours in surface drying time; the strength is high: the breaking strength is more than or equal to 0.4MPa, and the compressive strength is more than or equal to 1.3 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has a dry density of greater than or equal to 480kg/m3(ii) a The fire resistance time is 175 min; wherein, the water is added according to the mixing water consumption with the water-cement ratio less than 0.5 and is uniformly stirred, and the paint can be directly sprayed on the wall surface and has good spraying property.
(5) In the second embodiment, the anhydrite-based indoor non-intumescent fire-retardant coating with a steel structure has a slightly long surface drying time which is more than or equal to 3 hours; the strength is moderate: flexural strength of 0.35MPa or more, compressive strength of 0.35MPa or moreAt 1.2 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has moderate dry density of less than or equal to 480kg/m3And a fire resistance time of 185 mim.
(6) The setting time of the anhydrite-based indoor non-intumescent steel structure fireproof coating in the third embodiment is prolonged, and the surface drying time is more than or equal to 4 hours; the strength becomes smaller: the breaking strength is more than or equal to 0.3MPa, and the compressive strength is more than or equal to 1.1 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has a low dry density of 400kg/m or less3(ii) a The refractory time is 230min, and the improvement is achieved.
Detailed Description
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: an anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises fireproof coating, wherein the fireproof coating comprises anhydrite, cement, fly ash, metakaolin, an exciting agent, a pumping agent, a water-retaining agent, ceramic fiber, redispersible latex powder, vitrified micro bubbles and expanded vermiculite.
The fireproof coating comprises the following raw materials in parts by weight: 65 parts of anhydrite, 10 parts of cement, 6 parts of fly ash, 3 parts of metakaolin, 3 parts of an exciting agent, 0.05 part of a pumping agent, 0.15 part of a water-retaining agent, 0.1 part of ceramic fiber, 0.2 part of redispersible latex powder, 7 parts of vitrified micro bubbles and 4 parts of expanded vermiculite.
The anhydrite is the anhydrite associated with the pyrite production process. After hydration, dihydrate gypsum crystals are formed, and when the dihydrate gypsum crystals meet fire at high temperature, crystal water can be released, so that fire heat is effectively prevented from spreading.
The cement is silicate rotary kiln 425 II type cement.
The fly ash is grade II fly ash generated by a thermal power plant.
The metakaolin is a volcanic ash material with high activity formed by calcination, so that the corrosion resistance and the durability of the fireproof material are improved.
The exciting agent is any one or more than two of sodium salt series exciting agent, potassium salt series exciting agent and aluminum salt series exciting agent, and the mixture ratio of the two or more than two is arbitrary.
The water-retaining agent is prepared by mixing any one or more than two of hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC) and lithium bentonite in any ratio.
The specific gravity of the expanded vermiculite is 130-180kg/m3It has excellent water absorption, sound insulation, heat insulation and fire resistance.
A preparation method of anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises the following steps:
the first step is as follows: grinding anhydrite to obtain anhydrite powder;
the second step is that: respectively weighing 65 parts of anhydrite powder, 10 parts of cement, 6 parts of fly ash, 3 parts of metakaolin, 3 parts of excitant, 0.05 part of pumping aid, 0.15 part of water-retaining agent, 0.1 part of ceramic fiber, 0.2 part of redispersible latex powder, 7 parts of vitrified micro bubbles and 4 parts of expanded vermiculite according to the weight ratio;
the third step: pouring 3 parts of exciting agent, 0.05 part of pumping agent, 0.15 part of water-retaining agent, 0.1 part of ceramic fiber and 0.2 part of redispersible latex powder into a mixer to be mixed for more than 2 minutes in advance;
the fourth step: pouring 65 parts of anhydrite powder, 10 parts of cement, 6 parts of fly ash and 3 parts of metakaolin into a mixer, and mixing the materials with the premixed materials in a mixer for more than 3 minutes;
the fifth step: and (3) pouring 7 parts of vitrified micro bubbles and 4 parts of expanded vermiculite into a mixer in sequence, and uniformly mixing with the mixed materials in the fourth step.
The anhydrite-based indoor non-intumescent steel structure fireproof coating formed by the embodiment has the advantages of fast setting and hardening, short surface drying time, and less than or equal to 2 hours of surface drying time; the strength is high: the breaking strength is more than or equal to 0.4MPa, and the compressive strength is more than or equal to 1.3 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; high dry density of 480k or moreg/m3(ii) a The fire resistance time is 175 min; wherein, the water is added according to the mixing water consumption with the water-cement ratio of less than 0.5 and is uniformly stirred, and the paint can be directly sprayed on the wall surface, and the paint has good spraying property.
Example two: an anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises fireproof coating, wherein the fireproof coating comprises anhydrite, cement, fly ash, metakaolin, an exciting agent, a pumping agent, a water-retaining agent, ceramic fiber, redispersible latex powder, vitrified micro bubbles and expanded vermiculite.
The fireproof coating comprises the following raw materials in parts by weight: 68 parts of anhydrite, 11 parts of cement, 7 parts of fly ash, 3.5 parts of metakaolin, 3.5 parts of an exciting agent, 0.08 part of a pumping agent, 0.18 part of a water-retaining agent, 0.12 part of ceramic fiber, 0.3 part of redispersible latex powder, 9 parts of vitrified micro bubbles and 5 parts of expanded vermiculite.
The anhydrite is the anhydrite associated with the pyrite production process. After hydration, dihydrate gypsum crystals are formed, and when the dihydrate gypsum crystals meet fire at high temperature, crystal water can be released, so that fire heat is effectively prevented from spreading.
The cement is silicate rotary kiln 425 II type cement.
The fly ash is grade II fly ash generated by a thermal power plant.
The metakaolin is a volcanic ash material with high activity formed by calcination, so that the corrosion resistance and the durability of the fireproof material are improved.
The exciting agent is any one or more than two of sodium salt series exciting agent, potassium salt series exciting agent and aluminum salt series exciting agent, and the mixture ratio of the two or more than two is arbitrary.
The water-retaining agent is prepared by mixing any one or more than two of hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC) and lithium bentonite in any ratio.
The specific gravity of the expanded vermiculite is 130-180kg/m3It has excellent water absorption, sound insulation, heat insulation and fire resistance.
A preparation method of anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises the following steps:
the first step is as follows: grinding anhydrite to obtain anhydrite powder;
the second step is that: 68 parts of anhydrite powder, 11 parts of cement, 7 parts of fly ash, 3.5 parts of metakaolin, 3.5 parts of excitant, 0.08 part of pumping aid, 0.18 part of water-retaining agent, 0.12 part of ceramic fiber, 0.3 part of redispersible latex powder, 9 parts of vitrified micro bubbles and 5 parts of expanded vermiculite are respectively weighed according to the weight ratio;
the third step: pouring 3.5 parts of exciting agent, 0.08 part of pumping agent, 0.18 part of water-retaining agent, 0.12 part of ceramic fiber and 0.3 part of redispersible latex powder into a mixer to be mixed for more than 2 minutes in advance;
the fourth step: 68 parts of anhydrite powder, 11 parts of cement, 7 parts of fly ash and 3.5 parts of metakaolin are poured into a mixer and mixed with the premixed materials in a mixer for more than 3 minutes;
the fifth step: and (3) pouring 9 parts of vitrified micro bubbles and 5 parts of expanded vermiculite into a mixer in sequence, and uniformly mixing with the mixed materials in the fourth step.
The anhydrite-based indoor non-intumescent steel structure fireproof coating formed by the embodiment has slightly long surface drying time which is more than or equal to 3 hours; the strength is moderate: the breaking strength is more than or equal to 0.35MPa, and the compressive strength is more than or equal to 1.2 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has moderate dry density of less than or equal to 480kg/m3And a fire resistance time of 185 mim.
Example three: an anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises fireproof coating, wherein the fireproof coating comprises anhydrite, cement, fly ash, metakaolin, an exciting agent, a pumping agent, a water-retaining agent, ceramic fiber, redispersible latex powder, vitrified micro bubbles and expanded vermiculite.
The fireproof coating comprises the following raw materials in parts by weight: 70 parts of anhydrite, 12 parts of cement, 8 parts of fly ash, 4 parts of metakaolin, 4 parts of an exciting agent, 0.1 part of a pumping agent, 0.2 part of a water-retaining agent, 0.15 part of ceramic fiber, 0.35 part of redispersible latex powder, 10 parts of vitrified micro bubbles and 6 parts of expanded vermiculite.
The anhydrite is the anhydrite associated with the pyrite production process. After hydration, dihydrate gypsum crystals are formed, and when the dihydrate gypsum crystals meet fire at high temperature, crystal water can be released, so that fire heat is effectively prevented from spreading.
The cement is silicate rotary kiln 425 II type cement.
The fly ash is grade II fly ash generated by a thermal power plant.
The metakaolin is a volcanic ash material with high activity formed by calcination, so that the corrosion resistance and the durability of the fireproof material are improved.
The exciting agent is any one or more than two of sodium salt series exciting agent, potassium salt series exciting agent and aluminum salt series exciting agent, and the mixture ratio of the two or more than two is arbitrary.
The water-retaining agent is prepared by mixing any one or more than two of hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC) and lithium bentonite in any ratio.
The specific gravity of the expanded vermiculite is 130-180kg/m3It has excellent water absorption, sound insulation, heat insulation and fire resistance.
A preparation method of anhydrite-based indoor micro-expansion type steel structure fireproof coating comprises the following steps:
the first step is as follows: grinding anhydrite to obtain anhydrite powder;
the second step is that: 70 parts of anhydrite powder, 12 parts of cement, 8 parts of fly ash, 4 parts of metakaolin, 4 parts of excitant, 0.1 part of pumping aid, 0.2 part of water-retaining agent, 0.15 part of ceramic fiber, 0.35 part of redispersible latex powder, 10 parts of vitrified micro-beads and 6 parts of expanded vermiculite are respectively weighed according to the weight ratio;
the third step: pouring 4 parts of exciting agent, 0.1 part of pumping agent, 0.2 part of water-retaining agent, 0.15 part of ceramic fiber and 0.35 part of redispersible latex powder into a mixer to be mixed for more than 2 minutes in advance;
the fourth step: 70 parts of anhydrite powder, 12 parts of cement, 8 parts of fly ash and 4 parts of metakaolin are poured into a mixer and mixed with the premixed materials in a mixer for more than 3 minutes;
the fifth step: and (3) sequentially pouring 10 parts of vitrified micro bubbles and 6 parts of expanded vermiculite into a mixer, and uniformly mixing with the mixed materials in the fourth step.
The anhydrite-based indoor non-intumescent steel structure fireproof coating formed by the embodiment has the advantages that the setting time is prolonged, and the surface drying time is more than or equal to 4 hours; the strength becomes smaller: the breaking strength is more than or equal to 0.3MPa, and the compressive strength is more than or equal to 1.1 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has a low dry density of 400kg/m or less3(ii) a The fire resistance time is 230 min.
The working principle of the invention is as follows:
according to the invention, the silicate 425 II type cement used in the invention can improve the early strength of slurry and shorten the drying time, the II-grade fly ash can increase the workability of the slurry, the metakaolin can improve the corrosion resistance and durability of a fireproof material, the exciting agent can excite the activity of anhydrite and improve the hydration rate of the anhydrite, the pumping agent can improve the pumpability and spraying workability of the slurry, the water-retaining agent can improve the water retention property and workability of the slurry, the expanded vermiculite can improve the heat insulation property and fire resistance of the material, the ceramic fiber has low thermal conductivity and heat capacity, can improve the wind erosion resistance and pumpability of the material, and the vitrified micro-beads can reduce the dry density of the material. Therefore, the anhydrite-based indoor non-expansion type steel structure fireproof coating has good performances of moisture resistance, heat insulation, fire prevention and strong bonding force, and the crack resistance and hollowness resistance of the sprayed anhydrite are excellent due to the micro-expansion performance of the anhydrite after hydration, so that the difficult problems of hollowness and cracking of the cement-based and magnesium hydroxide-based fireproof coatings caused by cement shrinkage after spraying are fundamentally solved, and the anhydrite-based indoor non-expansion type steel structure fireproof coating has excellent market competitiveness.
In the invention, the anhydrite associated with the pyrite production process is used as a main material to prepare the anhydrite-based indoor non-expansion type steel structure fireproof coating, calcination treatment is not needed, only physical powder and mixing are needed, the preparation process is simple, energy is saved, pollution is reduced, comprehensive utilization of resources is fully reflected, and deep processing of associated gypsum resources is realized.
The anhydrite-based indoor non-expansion type steel structure fireproof coating is suitable for thick spraying of the surface of an indoor steel structure, and when the anhydrite-based indoor non-expansion type steel structure fireproof coating is used on site, water is added according to the mixing water consumption with the water-cement ratio of 0.45-0.50, the anhydrite-based indoor non-expansion type steel structure fireproof coating is uniformly stirred, and an interface agent does not need to be coated on a wall surface, so that the anhydrite-based indoor non-expansion type steel structure fireproof coating can be directly sprayed.
In the invention, the anhydrite-based indoor non-expansion type steel structure fireproof coating in the first embodiment has the advantages of fast setting and hardening, short surface drying time, and less than or equal to 2 hours of surface drying time; the strength is high: the breaking strength is more than or equal to 0.4MPa, and the compressive strength is more than or equal to 1.3 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has a dry density of greater than or equal to 480kg/m3(ii) a The fire resistance time is 175 min; wherein, the water is added according to the mixing water consumption with the water-cement ratio less than 0.5 and is uniformly stirred, and the paint can be directly sprayed on the wall surface and has good spraying property.
In the invention, in the second embodiment, the surface drying time of the anhydrite-based indoor non-expansion type steel structure fireproof coating is slightly long and is more than or equal to 3 hours; the strength is moderate: the breaking strength is more than or equal to 0.35MPa, and the compressive strength is more than or equal to 1.2 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has moderate dry density of less than or equal to 480kg/m3And a fire resistance time of 185 mim.
In the invention, the setting time of the anhydrite-based indoor non-expansion type steel structure fireproof coating in the third embodiment is prolonged, and the surface drying time is more than or equal to 4 hours; the strength becomes smaller: the breaking strength is more than or equal to 0.3MPa, and the compressive strength is more than or equal to 1.1 MPa; the workability of the slurry is good, the spraying performance is good, and the construction efficiency is favorably improved; has a low dry density of 400kg/m or less3(ii) a The refractory time is 230min, and the improvement is achieved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an anhydrite-based indoor micro-expansion type steel structure fireproof coating, which comprises a fireproof coating and is characterized in that: the fireproof coating comprises anhydrite, cement, fly ash, metakaolin, an exciting agent, a pumping agent, a water-retaining agent, ceramic fibers, redispersible latex powder, vitrified micro bubbles and expanded vermiculite.
2. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the fireproof coating comprises the following raw materials in parts by weight: 65-70 parts of anhydrite, 10-12 parts of cement, 6-8 parts of fly ash, 3-4 parts of metakaolin, 3-4 parts of excitant, 0.05-0.1 part of pumping aid, 0.15-0.2 part of water-retaining agent, 0.1-0.35 part of ceramic fiber, 0.2-0.35 part of redispersible latex powder, 7-10 parts of vitrified micro bubbles and 4-6 parts of expanded vermiculite.
3. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the anhydrite is the anhydrite associated with the pyrite production process; after hydration, dihydrate gypsum crystals are formed, and when the dihydrate gypsum crystals meet fire at high temperature, crystal water can be released, so that fire heat is effectively prevented from spreading.
4. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the cement is silicate rotary kiln 425 II type cement.
5. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the fly ash is grade II fly ash generated by a thermal power plant.
6. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the metakaolin is a volcanic ash material with high activity formed by calcination, so that the corrosion resistance and the durability of the fireproof material are improved.
7. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the exciting agent is any one or more than two of sodium salt series exciting agent, potassium salt series exciting agent and aluminum salt series exciting agent, and the mixture ratio of the two or more than two is arbitrary.
8. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the water-retaining agent is prepared by mixing any one or more than two of hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC) and lithium bentonite in any ratio.
9. The anhydrite-based indoor micro-expansion type steel structure fireproof coating as claimed in claim 1, wherein: the specific gravity of the expanded vermiculite is 130-180kg/m3It has excellent water absorption, sound insulation, heat insulation and fire resistance.
10. A preparation method of anhydrite-based indoor micro-expansion type steel structure fireproof coating is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: grinding anhydrite to obtain anhydrite powder;
the second step is that: according to the weight ratio, 65-70 parts of anhydrite powder, 10-12 parts of cement, 6-8 parts of fly ash, 3-4 parts of metakaolin, 3-4 parts of excitant, 0.05-0.1 part of pumping aid, 0.15-0.2 part of water-retaining agent, 0.1-0.35 part of ceramic fiber, 0.2-0.35 part of redispersible latex powder, 7-10 parts of vitrified micro-beads and 4-6 parts of expanded vermiculite are respectively weighed;
the third step: pouring 3-4 parts of exciting agent, 0.05-0.1 part of pumping agent, 0.15-0.2 part of water-retaining agent, 0.1-0.35 part of ceramic fiber and 0.2-0.35 part of redispersible latex powder into a mixer to be mixed for more than 2 minutes in advance;
the fourth step: pouring 65-70 parts of anhydrite powder, 10-12 parts of cement, 6-8 parts of fly ash and 3-4 parts of metakaolin into a mixer, and mixing the materials with the premixed materials in the mixer for more than 3 minutes;
the fifth step: and (3) sequentially pouring 7-10 parts of vitrified micro bubbles and 4-6 parts of expanded vermiculite into the mixer, and uniformly mixing the vitrified micro bubbles and the mixed material obtained in the fourth step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210007497.4A CN114316640A (en) | 2022-01-06 | 2022-01-06 | Anhydrite-based indoor micro-expansion type steel structure fireproof coating and preparation method thereof |
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| CN202210007497.4A CN114316640A (en) | 2022-01-06 | 2022-01-06 | Anhydrite-based indoor micro-expansion type steel structure fireproof coating and preparation method thereof |
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Citations (5)
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|---|---|---|---|---|
| CN1384153A (en) * | 2002-05-17 | 2002-12-11 | 白树军 | Fireproof paint for steel structure of housing |
| WO2006070960A1 (en) * | 2004-12-31 | 2006-07-06 | Kyung Dong Ceratech Co., Ltd. | Covering composite for fire resistance and sound absorption |
| CN102746763A (en) * | 2011-04-22 | 2012-10-24 | 北京建筑技术发展有限责任公司 | Steel structure fireproof paint by taking expanded and vitrified small ball as base material |
| CN112266640A (en) * | 2020-10-13 | 2021-01-26 | 安徽合信大环保科技有限公司 | Anhydrite-based indoor micro-expansion type steel structure fireproof coating and preparation method thereof |
| CN112552719A (en) * | 2020-11-27 | 2021-03-26 | 鲁米科技(山东)有限公司 | Concrete surface fireproof heat-preservation gypsum-based fireproof coating and preparation method thereof |
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2022
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| CN1384153A (en) * | 2002-05-17 | 2002-12-11 | 白树军 | Fireproof paint for steel structure of housing |
| WO2006070960A1 (en) * | 2004-12-31 | 2006-07-06 | Kyung Dong Ceratech Co., Ltd. | Covering composite for fire resistance and sound absorption |
| CN102746763A (en) * | 2011-04-22 | 2012-10-24 | 北京建筑技术发展有限责任公司 | Steel structure fireproof paint by taking expanded and vitrified small ball as base material |
| CN112266640A (en) * | 2020-10-13 | 2021-01-26 | 安徽合信大环保科技有限公司 | Anhydrite-based indoor micro-expansion type steel structure fireproof coating and preparation method thereof |
| CN112552719A (en) * | 2020-11-27 | 2021-03-26 | 鲁米科技(山东)有限公司 | Concrete surface fireproof heat-preservation gypsum-based fireproof coating and preparation method thereof |
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| 曾爱斌等: "脱硫石膏-铝土矿-硅酸盐水泥混合基自流平材料", 《硅酸盐通报》 * |
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