CN115041374A - Fireproof coating construction process for steel structure - Google Patents
Fireproof coating construction process for steel structure Download PDFInfo
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- CN115041374A CN115041374A CN202210697047.2A CN202210697047A CN115041374A CN 115041374 A CN115041374 A CN 115041374A CN 202210697047 A CN202210697047 A CN 202210697047A CN 115041374 A CN115041374 A CN 115041374A
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- 238000000576 coating method Methods 0.000 title claims abstract description 109
- 239000011248 coating agent Substances 0.000 title claims abstract description 101
- 238000010276 construction Methods 0.000 title claims abstract description 75
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 59
- 239000010959 steel Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000003973 paint Substances 0.000 claims abstract description 45
- 238000005507 spraying Methods 0.000 claims abstract description 45
- 239000010410 layer Substances 0.000 claims abstract description 21
- 238000007689 inspection Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims abstract description 5
- 238000012937 correction Methods 0.000 claims abstract description 4
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 43
- 230000001680 brushing effect Effects 0.000 claims description 22
- 238000007790 scraping Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 17
- 239000003063 flame retardant Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000007667 floating Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- -1 silt Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 210000003437 trachea Anatomy 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000009966 trimming Methods 0.000 claims description 2
- 238000005034 decoration Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000011241 protective layer Substances 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 6
- 239000004566 building material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000010422 painting Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 239000003085 diluting agent Substances 0.000 description 1
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- 238000009941 weaving Methods 0.000 description 1
Classifications
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- 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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a construction process of a fireproof coating of a steel structure, which comprises the following steps: construction preparation: building a construction scaffold and an operation platform, preprocessing a steel structure base layer, and preparing a fireproof coating when the fireproof coating requirement is met; the construction process comprises the following steps: spraying a first layer of fireproof paint, namely spraying a second layer of fireproof paint after the first layer of fireproof paint is dried, and performing procedure handover after the thickness reaches the design requirement, corner and interface position correction, inspection, unqualified repair, qualified product protection and finished product protection. The fireproof coating is sprayed on the outer surface of the steel structure, has a certain decoration effect, can quickly form a fireproof heat-insulation protective layer when in fire, and improves the fireproof limit of the steel structure. The construction steps of the coating are scientific and reasonable, and the coating has strong operability; the method can guarantee the quality, safety and construction period requirements of the project and reduce the cost of the project.
Description
Technical Field
The invention belongs to the technical field of fireproof coatings, and particularly relates to a construction process of a fireproof coating for a steel structure.
Background
The steel structure is used as a form of high-rise building structure, and is widely applied to the building industry due to the characteristics of high strength, light weight, good extensibility, good earthquake resistance, short construction period and the like. The steel is a building material which can not be burnt, and the unprotected steel structure can rise to over 540 ℃ in 15 minutes under the condition of fire, so that the member per se is distorted and deformed, and the building collapses and is damaged. Therefore, fire protection measures must be taken for steel structures, and fire retardant coatings or fire retardants must be applied.
The steel structure is used as a main form of a modern building, has the advantages of light weight, high strength, good earthquake resistance, short construction period, high building industrialization degree, high space utilization rate and the like at normal temperature, and is applied by investors in a large amount for saving investment of enterprises. But the steel structure building has the characteristic of poor fire resistance, and the steel is a non-combustible material, but is a good thermal conductor, so that heat is easy to conduct. After the temperature of the steel exceeds 300 ℃, the yield point and the ultimate strength are obviously reduced, and the strength is almost equal to zero when the temperature reaches 600 ℃. Therefore, the industry not only carries out deep research on the steel structure fireproof coating and continuously develops applicable materials, but also puts strict requirements on the construction method of the fireproof coating. However, in order to prevent the steel material from rapidly increasing in temperature and decreasing in strength in a fire, a fireproof paint is generally applied or sprayed on the surface of the steel structure to perform a fireproof and heat insulating function. After the existing fireproof paint is coated or sprayed on the surface of a steel structure, the conditions of cracking, falling and the like are easy to occur, so that the fireproof effect is not ideal, and therefore, the space for improvement is needed.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the defects of the prior art, the invention provides a construction process of a fireproof coating of a steel structure.
The technical scheme is as follows: a construction process of a fireproof coating of a steel structure comprises the following steps:
construction preparation: building a construction scaffold and an operation platform, preprocessing a steel structure base layer, and preparing a fireproof coating when the fireproof coating requirement is met;
the construction process comprises the following steps: spraying a first layer of fireproof coating, namely spraying a second layer of fireproof coating after the first layer of fireproof coating is dried, and performing procedure handover after the thickness reaches the design requirement, corner and interface position correction, inspection, unqualified repair, qualified product protection and finished product protection; wherein:
the fireproof coating is mainly constructed in a spraying mode, and a blade coating mode and a brush coating mode are locally adopted;
the construction of the spraying mode comprises the following specific operations: the gravity type coating spray gun is preferably used as the spray gun, the caliber of the spray gun is adjustable, the caliber of the spray nozzle is 2-5 mm, and the air pressure is controlled to be 0.4-0.6 MPa; the distance between the spray nozzle and the spraying surface is 25-30 cm, the spray nozzle and the base surface basically keep vertical, the moving direction of the spray gun is parallel to the surface of the base material and cannot move in an arc shape, otherwise, the sprayed coating is thick in the middle and thin at two sides; when in operation, the spray gun is moved firstly, then the spray gun air supply valve is opened, and the spray gun is stopped moving after the spray gun air supply valve is closed, so that the influence of the excessive head and tail thickness of each row of coatings on the attractive appearance of the coatings is avoided;
when the external corner of the component is sprayed, the external corner can be sprayed from the end part to the top down or from the left to the right vertical base surface, and then the external corner is sprayed horizontally; when spraying the internal corner, the spraying is not directly sprayed against the corner of the component, the spraying is vertically sprayed from top to bottom from two sides of the corner respectively, then the spraying is horizontally sprayed, and when the spraying is vertically sprayed, the nozzle is far away from the top of the corner, so that the generated spraying is just fused at the top of the corner, and the flow drop is not generated; when the beam bottom is sprayed, in order to prevent the paint from floating on the body, the beam bottom should stand backwards as much as possible, and the inclination angle of the spray gun should not be too large so as not to influence discharging;
the blade coating construction method specifically comprises the following operations: the scraping construction adopts a scraping knife, a trowel and a scraping plate, and the scraping is characterized by being solid, flat and smooth, namely, fireproof coating layers are tightly contacted and firmly bonded, and the surface is flat and smooth, so that the trimming workload is reduced and the smooth surface effect of the whole coating is achieved; the gradient of a scraping tool is well controlled during scraping, and the force is uniformly applied;
the brush coating mode construction specifically comprises the following operations: selecting a bristle brush with the width of 75-150 mm, wherein bristles are uniform and are not easy to fall off, and in order to prevent bristles from falling off during brushing, the bristle brush can be dipped with paint firstly, so that the paint is soaked into the root of the bristle brush to fix the bristle root, and the bristle brush is cleaned with water or a solvent in time after being used;
when in brush coating, the brush is soaked by water or thinner for spin-drying, and then dipped and coated, and the brush hair is not dipped too deeply into the coating; after dipping, scraping redundant paint on a material homogenizing plate or the edge of a glue bucket, then brushing the paint on the surface of a steel base material in sequence, wherein the angle between a cloth brush and a painted base surface is about 50-70 degrees, the paint acts rapidly during brushing, and each brushing segment is not too wide so as to ensure that the edge is not dried yet and the trace of a joint is not shown when the edges are mutually connected.
As an optimization: the base layer before construction is treated as follows: before spraying (brushing) the fireproof paint, firstly, cleaning the surface of a steel member needing the fireproof paint; removing floating slurry, silt, dust and other adhered substances on the surface of the steel member by using a scraper knife, a steel wire brush and the like; the surface of the steel member cannot be stained with water and oil, otherwise, the steel member must be wiped clean by a clean towel; the rust on the surface of the steel member must be removed completely, the surface of the base layer is treated completely, and the construction of the fireproof coating is carried out after the treatment is qualified through the inspection of relevant units.
As an optimization: preparation of materials: the used steel structure fireproof coating needs to be uniformly stirred by a stirrer on site, and a stirring area needs to be arranged beside a temporary warehouse to facilitate stirring of the coating; and after the fireproof coating is stirred in the stirring area, subpackaging by using a glue barrel, conveying to each spraying, scraping and brushing team by using a trolley or a hand-held barrel, and then constructing.
As an optimization: the main equipment for spraying construction is as follows: air compressor machine, gravity type spray gun, paint spray gun, trachea.
Has the advantages that: the fireproof coating is sprayed on the outer surface of the steel structure, has a certain decoration effect, can quickly form a fireproof heat-insulation protective layer when in fire, and improves the fireproof limit of the steel structure. The construction steps of the coating are scientific and reasonable, and the coating has strong operability; the method can guarantee the quality, safety and construction period requirements of the project and reduce the cost of the project.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention will be more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.
Examples
1. Base treatment before construction
Before spraying (brushing) the fireproof paint, firstly, cleaning the surface of a steel member needing the fireproof paint; removing floating slurry, silt, dust and other adhered substances on the surface of the steel member by using a scraper knife, a steel wire brush and the like; the surface of the steel member is not required to be stained with water and greasy dirt, otherwise, the steel member is required to be wiped clean by a clean towel; the rust return on the surface of the steel member must be cleaned, the surface of the base layer is treated, and the construction of the fireproof coating is carried out after the surface is qualified through the inspection of relevant units.
2. Preparation of the Material
Before the fireproof coating delivered to a construction site enters a temporary warehouse of the construction site, the type, the brand, the production date, the color, the qualification certificate, the factory inspection report, the quality guarantee period and the like of the fireproof coating must be checked item by item. The brand, the model and the color of the coating can be used only when the brand, the model and the color of the coating are completely consistent with the fire-retardant coating required by the project; the production date, the qualification certificate, the factory inspection report and the like are in accordance with the materials on the spot, and can be accepted and put in storage.
According to a strict material approval system of the fire-retardant coating for entering the field, a building material approval table must be filled in each batch of fire-retardant coating for entering the field, and the fire-retardant coating can be used after being approved by supervision and relevant units.
The steel structure fireproof coating used by the invention needs to be uniformly stirred by a stirrer on site, so that a stirring area needs to be arranged beside a temporary warehouse to facilitate the stirring of the coating. After the fireproof paint is stirred in the stirring area, the fireproof paint is subpackaged by a glue barrel, and is transported to each spraying, blade coating and brush coating team by a trolley or a portable barrel of a transportation team, and then construction is carried out.
3. Construction process flow
The construction process flow of the on-site fireproof coating is as follows:
construction preparation: building a construction scaffold and an operation platform, preprocessing a steel structure base layer, and preparing a fireproof coating when the fireproof coating requirement is met;
the construction process comprises the following steps: spraying a first layer of fireproof paint, namely spraying a second layer of fireproof paint after the first layer of fireproof paint is dried, and performing procedure handover after the thickness reaches the design requirement, corner and interface position correction, inspection, unqualified repair, qualified product protection and finished product protection.
First construction method and equipment
The engineering fireproof coating is mainly constructed in a spraying mode, and locally adopts a brushing and blade coating mode;
the main equipment for spraying construction is as follows: air compressor machine, gravity type spray gun, paint spray gun, trachea etc..
The technical key points of construction
A. And (3) spraying construction: the gravity type paint spray gun is preferably used as the spray gun, the caliber of the spray nozzle is preferably 2-5 mm (the spray gun with adjustable caliber is preferably used), and the air pressure is preferably controlled at 0.4-0.6 MPa. The distance between the spray nozzle and the spraying surface is moderate, the distance is about 25-30 cm generally, the spray nozzle and the base surface are basically vertical, the moving direction of the spray gun is parallel to the surface of the base material and cannot move in an arc shape, otherwise, the sprayed coating is thick in the middle and thin at two sides. When the spray gun is operated, the spray gun is moved firstly, then the spray gun air supply valve is opened, and the spray gun is stopped moving after the spray gun air supply valve is closed, so that the influence of the head and the tail of each row of coatings on the attractive appearance of the coatings is avoided.
When the external corner of the component is sprayed, the external corner can be sprayed from the end part to the top down or from the left to the right vertical base surface, and then the external corner is sprayed horizontally; when spraying the internal corner, the spraying is not directly sprayed against the corner of the component, the spraying is vertically sprayed from top to bottom from two sides of the corner respectively, then the spraying is horizontally sprayed, and when the spraying is vertically sprayed, the nozzle is far away from the top of the corner, so that the generated spraying is just fused at the top of the corner, and the flow drop is not generated; when the beam bottom is sprayed, in order to prevent the paint from floating on the body, the beam should stand backwards as much as possible, and the inclination angle of the spray gun should not be too large so as not to influence discharging.
B. Blade coating construction: the scraping construction should adopt the scraping knife, trowel and scraper blade, and the main points of scraping are real, flat, smooth, should contact closely between the fire retardant coating promptly, and the bonding is firm, and the surface should be level and smooth to reduce the finishing work load and reach the plain noodles effect of whole coating. The gradient of the scraping tool should be well controlled during scraping, and the force should be uniform.
C. Brushing construction: preferably, the bristle brush with the width of about 75-150 mm is selected, and the bristles are uniform and are not easy to fall off. In order to prevent hair from falling off during brushing, the brush can be dipped with paint firstly, the paint is soaked into the root of the brush to fix the hair root, and the brush is cleaned by water or solvent in time after being used.
When the brush is used for brushing, the brush is soaked by water or a diluent and dried, then the brush is dipped and brushed, and the brush hair is not dipped too deeply into the paint. After dipping, scraping redundant paint on a material homogenizing plate or the edge of a glue bucket, then brushing the paint on the surface of a steel base material in sequence, wherein the angle between a cloth brush and a painted base surface is about 50-70 degrees, the paint acts rapidly during brushing, and each brushing segment is not too wide so as to ensure that the edge is not dried yet and the trace of a joint is not shown when the edges are mutually connected.
4. Construction quality control
a. Technical preparation:
the detailed information of coating and processing units meeting requirements is reported to a supervision unit and an amateur for selection according to design and specification requirements.
And determining the coating and the manufacturer according to various fireproof test results submitted by the manufacturer.
Thirdly, purchasing the coating according to the weaving operation scheme.
And fourthly, conducting advanced inspection on the paint, and painting the paint after the paint is qualified.
b. The construction process comprises the following steps: technical preparation → erection of safety facilities → cleaning of component surface → painting → inspection and acceptance.
c. Quality control:
the construction of the fireproof paint must be completed in several times, and each time of construction can be carried out after the fireproof paint of the previous construction is dried.
The recoating interval time of the fireproof coating construction is determined according to the ventilation condition and the weather condition of the site construction environment, and the recoating interval time is 8-12 hours under the conditions that the ventilation condition of the site construction environment is good and the weather is clear.
When the wind speed is more than 5m/s, the relative humidity is more than 90 percent, and condensation exists on the surface of a steel member or in rainy days, the construction of the fireproof coating is not suitable if other special treatment measures are not available.
When the fireproof coating is constructed, the finished products possibly polluted on the construction site are shielded and protected by using colored strip cloth or plastic films.
In the construction of the fireproof coating, the finished fireproof coating may be damaged and destroyed due to cross operation, scaffold erection, disassembly and other inevitable influence factors, and must be repaired.
The repair of the fireproof coating can adopt methods such as spraying, brushing and the like.
Before repair construction, the damaged coating must be treated, the loose fireproof coating is removed, and the coating is cleaned up.
And then repairing according to the construction process of the fireproof coating.
5. Construction quality detection
a. The product quality is as follows: a group of test pieces are needed to be made on the heat-insulating fireproof coating for site construction and are sent to national fireproof building material quality supervision and detection for detection.
When the steel structure fireproof coating is delivered from a factory, the product quality is in accordance with the regulations of relevant standards. And should be accompanied by the name of the paint type, technical properties, manufacturing batch, shelf life and instructions for use.
b. Coating the surface: leveling, no color difference and no missing coating; and (5) visually inspecting the coated surface.
c. And (3) detection of thickness: the detection method of the steel structure top and wall is measured by a needle penetration method, the number of the components to be spot-checked is not less than 20% of the total number of the components to be constructed, but not less than 3 components, the unit spot-check area is not less than 3m2, the detection points in the unit spot-check area are not less than 8 points, and the brushing needs to be performed when the average thickness value is less than the allowable minimum value.
d. Surface flatness: the number of the checks is 20% of the same type of members, but is not less than 3.
The fireproof coating is sprayed on the outer surface of the steel structure, has a certain decoration effect, can quickly form a fireproof heat-insulation protective layer when in fire, and improves the fireproof limit of the steel structure. The construction steps of the coating are scientific and reasonable, and the coating has strong operability; the method can guarantee the quality, safety and construction period requirements of the project and reduce the cost of the project.
Claims (4)
1. A construction process of a fireproof coating of a steel structure is characterized in that: the fireproof coating construction process flow is as follows:
construction preparation: building a construction scaffold and an operation platform, preprocessing a steel structure base layer, and preparing a fireproof coating when the fireproof coating requirement is met;
the construction process comprises the following steps: spraying a first layer of fireproof coating, namely spraying a second layer of fireproof coating after the first layer of fireproof coating is dried, and performing procedure handover after the thickness reaches the design requirement, corner and interface position correction, inspection, unqualified repair, qualified product protection and finished product protection; wherein:
the fireproof coating is mainly constructed in a spraying mode, and a blade coating mode and a brush coating mode are locally adopted;
the construction of the spraying mode comprises the following specific operations: the gravity type coating spray gun is preferably used as the spray gun, the caliber of the spray gun is adjustable, the caliber of the spray nozzle is 2-5 mm, and the air pressure is controlled to be 0.4-0.6 MPa; the distance between the spray nozzle and the spraying surface is 25-30 cm, the spray nozzle and the base surface basically keep vertical, the moving direction of the spray gun is parallel to the surface of the base material and cannot move in an arc shape, otherwise, the sprayed coating is thick in the middle and thin at two sides; when in operation, the spray gun is moved firstly, then the spray gun air supply valve is opened, and the spray gun is stopped moving after the spray gun air supply valve is closed, so that the influence of the excessive head and tail thickness of each row of coatings on the attractive appearance of the coatings is avoided;
when the external corner of the component is sprayed, the external corner can be sprayed from the end part to the top down or from the left to the right vertical base surface, and then the external corner is sprayed horizontally; when spraying the internal corner, the spraying is not directly sprayed against the corner of the component, the spraying is vertically sprayed from top to bottom from two sides of the corner respectively, then the spraying is horizontally sprayed, and when the spraying is vertically sprayed, the nozzle is far away from the top of the corner, so that the generated spraying is just fused at the top of the corner, and the flow drop is not generated; when the beam bottom is sprayed, in order to prevent the paint from floating on the body, the beam bottom should stand backwards as much as possible, and the inclination angle of the spray gun should not be too large so as not to influence discharging;
the blade coating construction method specifically comprises the following operations: the scraping construction adopts a scraping knife, a trowel and a scraping plate, and the scraping is characterized by being solid, flat and smooth, namely, fireproof coating layers are tightly contacted and firmly bonded, and the surface is flat and smooth, so that the trimming workload is reduced and the smooth surface effect of the whole coating is achieved; the gradient of a scraping tool is well controlled during scraping, and the force is uniformly applied;
the brush coating mode construction specifically comprises the following operations: selecting a bristle brush with the width of 75-150 mm, wherein bristles are uniform and are not easy to fall off, and in order to prevent bristles from falling off during brushing, the bristle brush can be dipped with paint firstly, so that the paint is soaked into the root of the bristle brush to fix the bristle root, and the bristle brush is cleaned with water or a solvent in time after being used;
when in brush coating, the brush is soaked by water or thinner for spin-drying, and then dipped and coated, and the brush hair is not dipped too deeply into the coating; after dipping, scraping redundant paint on a material homogenizing plate or the edge of a glue bucket, then brushing the paint on the surface of a steel base material in sequence, wherein the angle between a cloth brush and a painted base surface is about 50-70 degrees, the paint acts rapidly during brushing, and each brushing segment is not too wide so as to ensure that the edge is not dried yet and the trace of a joint is not shown when the edges are mutually connected.
2. The fire retardant coating construction process of steel structure of claim 1, characterized in that: the base layer before construction is treated as follows: before spraying (brushing) the fireproof paint, firstly, cleaning the surface of a steel member needing the fireproof paint; removing floating slurry, silt, dust and other adhered substances on the surface of the steel member by using a scraper knife, a steel wire brush and the like; the surface of the steel member cannot be stained with water and oil, otherwise, the steel member must be wiped clean by a clean towel; the rust return on the surface of the steel member must be cleaned, the surface of the base layer is treated, and the construction of the fireproof coating is carried out after the surface is qualified through the inspection of relevant units.
3. The fire retardant coating construction process of steel structure of claim 1, characterized in that: preparation of materials: the used steel structure fireproof coating needs to be uniformly stirred by a stirrer on site, and a stirring area needs to be arranged beside a temporary warehouse to facilitate stirring of the coating; and after the fireproof coating is stirred in the stirring area, subpackaging by using a glue barrel, conveying to each spraying, scraping and brushing team by using a trolley or a hand-held barrel, and then constructing.
4. The fire retardant coating construction process of steel structure of claim 1, characterized in that: the main equipment for spraying construction is as follows: air compressor machine, gravity type spray gun, paint spray gun, trachea.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697047.2A CN115041374A (en) | 2022-06-20 | 2022-06-20 | Fireproof coating construction process for steel structure |
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| CN202210697047.2A CN115041374A (en) | 2022-06-20 | 2022-06-20 | Fireproof coating construction process for steel structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598020A (en) * | 2015-12-20 | 2016-05-25 | 安徽伟宏钢结构集团股份有限公司 | Fireproof paint construction process of indoor thin type steel structure |
| CN105689243A (en) * | 2014-11-28 | 2016-06-22 | 重庆伊曼环保设备有限公司 | Thin coating type steel structure fireproof coating construction process |
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