CN111617947A - Construction method of thick-paste steel structure fireproof coating - Google Patents
Construction method of thick-paste steel structure fireproof coating Download PDFInfo
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- CN111617947A CN111617947A CN202010539774.7A CN202010539774A CN111617947A CN 111617947 A CN111617947 A CN 111617947A CN 202010539774 A CN202010539774 A CN 202010539774A CN 111617947 A CN111617947 A CN 111617947A
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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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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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
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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
- B05D7/16—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 using synthetic lacquers or varnishes
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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
- B05D7/24—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 for applying particular liquids or other fluent materials
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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
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/162—Cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
- B32B2037/243—Coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
Abstract
The application provides a construction method of a thick-paste type steel structure fireproof coating, which comprises the following steps: carrying out base layer cleaning on the surface of the steel structure; spraying intermediate paint on the surface of the steel structure after the base layer is cleaned, so as to obtain a sprayed base layer; spraying a fireproof coating to the spraying base layer to form a priming layer; laying a steel wire mesh on the bottom layer; and spraying the fireproof paint to the steel wire mesh for multiple times to form a multi-layer fireproof layer. The construction method can improve the adhesion of the fireproof coating and the steel structure and prevent the fireproof coating from falling off.
Description
Technical Field
The application relates to the field of fireproof structure structures, in particular to a construction method of thick-slurry type steel structure fireproof paint.
Background
The steel structure is widely used due to the characteristics of high strength, light dead weight, high construction speed, simple and convenient manufacture and the like. But the steel structure rapidly loses strength and deforms at high temperatures. The fire endurance of the steel structure is only 15 minutes, when the heating temperature exceeds 250 ℃, the strength is reduced rapidly, when the heating temperature reaches 600 ℃, the strength is only 1/3 under the normal state, and the actual general fire scene temperature exceeds 700 ℃. Under the action of high temperature in a fire, the steel structure can quickly reach the fire resistance limit, lose strength and lose bearing capacity, and cause partial or whole damage of the building. Therefore, the existing steel structure engineering adopts a mode of coating fireproof paint on the surface of the steel structure for fireproof protection, so that the damage of the steel structure is prevented.
The requirement on the spraying thickness of the thick paste type fireproof coating is high, and the conditions of poor bonding, later falling and the like are easy to occur.
Disclosure of Invention
The embodiment of the application aims to provide a construction method of a thick-paste steel structure fireproof coating, which can improve the adhesion of the fireproof coating and a steel structure and prevent the fireproof coating from falling off.
The embodiment of the application provides a thick-paste type steel structure fireproof coating, and the construction method comprises the following steps: carrying out base layer cleaning on the surface of the steel structure; spraying intermediate paint on the surface of the steel structure after the base layer is cleaned, so as to obtain a sprayed base layer; spraying a fireproof coating to the spraying base layer to form a priming layer; laying a steel wire mesh on the bottom layer; and spraying the fireproof paint to the steel wire mesh for multiple times to form a multi-layer fireproof layer.
In the implementation process, the steel structure surface is firstly cleaned and sprayed with the intermediate paint before the fireproof paint is sprayed, so that the bonding force between the fireproof paint and the steel structure surface can be improved. The fireproof coating is firstly sprayed on the surface of the steel structure to serve as a bottom layer, then a steel wire mesh is laid on the bottom layer, and finally the fireproof coating is sprayed on the steel wire mesh for multiple times, so that the fireproof structure is formed. On one hand, the steel wire mesh can be used as a supporting structure, so that the strength of the fireproof structure is improved, powerful support is provided for the fireproof structure to meet the thickness requirement, the fireproof structure can meet the thickness requirement, and the structure is not easy to damage; on the other hand, the steel wire mesh can also be used as a connecting structure to improve the adhesion between the fireproof coating and the surface of the steel structure and the adhesion between the superposed fireproof layers, so that the fireproof layers can be effectively prevented from falling off.
In one possible implementation, the steel structure includes an external corner including two external sides; in the step of spraying the fireproof paint to the spraying base layer to form the priming layer and the step of spraying the fireproof paint to the steel wire mesh for multiple times to form the multi-layer fireproof layer, the method for spraying the fireproof paint to the external corner comprises the following steps: the two male side surfaces are firstly sprayed in the direction parallel to the male side surfaces, and then the male corners are sprayed in the direction perpendicular to the male side surfaces.
Adopt the external corner of above-mentioned mode spraying steel construction, can prevent effectively that fire prevention coating from flowing and weighing down, make fire prevention coating better fuse in external corner department.
In one possible implementation, the steel structure further comprises an internal corner, the internal corner comprising two internal sides; in the step of spraying the fireproof paint on the spraying base layer to form the priming layer and spraying the fireproof paint on the steel wire mesh for multiple times to form the fireproof layer, firstly spraying two concave side surfaces in the direction parallel to the concave side surfaces, and then spraying the concave corners in the direction perpendicular to the concave side surfaces.
Adopt the reentrant corner of above-mentioned mode spraying steel construction, can prevent effectively that fire prevention coating from flowing and weighing down, make fire prevention coating better fuse in reentrant corner department.
In one possible implementation manner, in the step of spraying the fireproof coating on the steel wire mesh for multiple times to form the multiple fireproof layers, after the upper layer of the base layer or the fireproof layer is cured, the next layer of the fireproof layer is sprayed.
Therefore, after the upper layer of the base layer or the fire-retardant layer is cured, the next layer of the fire-retardant layer is sprayed. This mode of operation can effectively improve the adhesion between flame retardant coating and bottom layer or the flame retardant coating, and then improves fire resistive construction's intensity, effectively prevents the condition of droing in the fire resistive construction later stage.
In one possible implementation, the base layer cleaning comprises surface cleaning treatment and rust removal treatment, and the rust removal treatment comprises removing a rust layer and coating antirust paint.
In a possible implementation manner, after the spraying base layer is obtained and before the base layer is formed, the method further comprises adhering a mounting nail for mounting the steel wire mesh to the spraying base layer.
Therefore, after the spraying base layer is obtained and before the bottom layer is formed, mounting nails are adhered to the spraying base layer and used for subsequently mounting the steel wire mesh. Compare the steel construction surface that only passes through basic unit's processing, the surface of spraying basic unit is more level and more smooth, and compare directly with steel material, the installation nail can bond better with intermediate coat, consequently selects the installation nail of adhesion on spraying basic unit surface. In addition, the installation nails are adhered before the base coat is sprayed, so that the integrity of the base coat can be protected, and the structure of the base coat is prevented from being damaged due to the installation of the installation nails.
In one possible embodiment, the intermediate paint is mixed with a quartz sand mixture.
Therefore, the quartz sand mixture is mixed in the intermediate paint, so that the roughness of the surface of the spraying base layer can be increased, and the bonding strength of the fireproof coating is further improved.
In one possible implementation, the density of the fire-retardant coating used to spray the primer layer is greater than the density of the fire-retardant coating used to spray the fire-retardant layer.
Therefore, the priming paint layer is used as the first layer of fireproof paint, the density of the fireproof paint of the priming paint layer is modulated greatly, the priming paint layer is bonded with the intermediate paint better, and the adhesion of the whole fireproof structure and the surface of a steel structure is improved.
In a possible implementation mode, the fireproof coating is sprayed by a spraying machine, and when the spraying machine sprays, the distance between a spraying opening of the spraying machine and the surface of the steel structure is 20-30 cm.
Therefore, the distance between the spraying opening and the surface of the steel structure can be controlled within the range of 20-30cm, on one hand, the adhesive force of the fireproof coating can be ensured, and on the other hand, the waste of the fireproof coating can be reduced.
In one possible implementation, the angle between the spraying direction of the sprayer and the steel structure surface is 40-50 degrees.
Therefore, when in spraying, the included angle between the spraying direction of the spraying machine and the surface of the steel structure is controlled within the range of 40-50 degrees, and the splashing and rebounding of the coating can be reduced to a certain extent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a flowchart of a construction method of a thick-gauge steel structure fireproof coating provided by an embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The steel structure fireproof coating has the characteristics of excellent bonding strength, good water resistance, good leveling property, good decoration and the like; when the fireproof thermal insulation layer is on fire, the fireproof thermal insulation layer slowly expands and foams to form a compact and hard fireproof thermal insulation layer with strong fire impact resistance, the temperature rise of steel is delayed by the fireproof thermal insulation layer, and the steel structural member is effectively protected. The steel structure fire-proof paint is compounded with polymethacrylate or epoxy resin with special structure, amino resin, chlorinated paraffin and other adhesive as base material, ammonium polyphosphate with high polymerization degree, dipentaerythritol, melamine and other fireproof and fire-retarding system, and through adding titanium white powder, wollastonite and other fireproof inorganic material and using solvent oil as solvent. Various light steel structures, net racks and the like are protected against fire by adopting the fireproof coating. Therefore, if the fireproof paint is not firmly bonded and separated from the steel structure, the fireproof paint is failed, and unnecessary loss is caused.
The application provides a construction method of thick-paste steel structure fireproof paint, which can effectively improve the adhesion of the fireproof paint and a steel structure and prevent the fireproof paint from falling off, and the method shown in figure 1 comprises the following steps:
and 100, cleaning a base layer on the surface of the steel structure.
Wherein, basic unit's processing can be handled including surface cleaning and rust cleaning, and surface cleaning handles mainly clears away debris such as the water stain of steel construction surface, oil stain, filth and dust, makes steel construction surface keep dry clean to debris influence fireproof paint and steel construction surface's bonding, and then influence the intensity of whole coating, specifically, can adopt the towel to clean steel construction surface totally. The rust removal treatment refers to removing rust on the surface of a steel structure which is rusted or has come off by using antirust paint, and specifically comprises removing a rust layer and coating the antirust paint additionally. The rust removing treatment can adopt different operation modes according to different corrosion degrees. The surface of the steel structure with the rust-proof paint falling off or not seriously rusted can be shoveled by a shovel blade to remove the peeled and fallen rust-proof paint, then a steel wire brush is used for brushing rust, the rust which is difficult to remove can be polished by carborundum until the surface of the steel structure is exposed, the same type of rust-proof paint is brushed for two to three times after the surface of the steel structure is cleaned, and the brushed rust-proof paint is required to completely cover the cleaning surface; if the rust is serious and the steel member is oxidized and blackened, the steel member can be polished by an electric grinder until the metal luster is exposed, then the antirust paint is brushed according to the antirust paint brushing process, and after the antirust paint is dried and cured, the spraying construction of the fireproof paint can be carried out.
In addition, gaps at the joints of adjacent steel members can be filled and leveled by using fireproof paint.
200, spraying intermediate paint on the surface of the steel structure after the base layer is cleaned to obtain a sprayed base layer;
before spraying the fireproof coating, firstly spraying a layer of intermediate paint on the surface of the steel structure, wherein the intermediate paint can isolate the surface of the steel structure from the outside and plays a role in rust prevention; on the other hand, the adhesion between the fireproof coating and the surface of the steel structure can be mainly improved.
The specific intermediate paint can be epoxy mica iron intermediate paint or other kinds of paint, and the embodiment of the application is not limited to this.
Furthermore, quartz sand mixture can be mixed in the intermediate paint, so that the roughness of the surface of the spraying base layer is increased, and the bonding strength of the fireproof coating is further improved.
And 300, spraying fireproof paint on the spraying base layer to form a priming layer.
And 400, paving a steel wire mesh on the bottom layer.
And 500, spraying the fireproof paint to the steel wire mesh for multiple times to form a multi-layer fireproof layer.
In the steps, the fireproof paint is firstly sprayed on the surface of the steel structure to serve as a bottom layer, then the steel wire mesh is laid on the bottom layer, and finally the fireproof paint is sprayed on the steel wire mesh for multiple times, so that the fireproof structure is formed. On one hand, the steel wire mesh can be used as a supporting structure, so that the strength of the fireproof structure is improved, powerful support is provided for the fireproof structure to meet the thickness requirement, the fireproof structure can meet the thickness requirement, and the structure is not easy to damage; on the other hand, the steel wire mesh can also be used as a connecting structure to improve the adhesion between the fireproof coating and the surface of the steel structure and the adhesion between the superposed fireproof layers, so that the fireproof layers can be effectively prevented from falling off.
In addition, in the implementation process, the fireproof coating is firstly sprayed as the priming layer before the steel wire mesh is laid, so that the subsequent fireproof coating can be better fused with the steel wire mesh to form a high-strength fireproof structure.
After the spraying base layer is obtained and before the bottom layer is formed, mounting nails are adhered to the spraying base layer and used for subsequently mounting the steel wire mesh. Compare the steel construction surface that only passes through basic unit's processing, the surface of spraying basic unit is more level and more smooth, and compare directly with steel material, the installation nail can bond better with intermediate coat, consequently selects the installation nail of adhesion on spraying basic unit surface. In addition, the installation nails are adhered before the base coat is sprayed, so that the integrity of the base coat can be protected, and the structure of the base coat is prevented from being damaged due to the installation of the installation nails.
Wherein the density of the fireproof paint for spraying the priming layer is greater than that of the fireproof paint for spraying the fireproof layer. The prime coat is used as a first layer of fireproof paint, the density of the fireproof paint of the prime coat is modulated greatly, the prime coat is bonded with the intermediate paint better, and the adhesion of the whole fireproof structure and the surface of a steel structure is improved.
In one embodiment, the number of spray passes of the primer layer may be 1 or 2, with the total thickness of the primer layer being about 2 mm. The thickness of each layer of fire-proof layer is between 5 and 10mm, and the number of the fire-proof layers is 2 to 5. The spraying construction of the fireproof coating is carried out in different times, and the specific spraying times and the thickness of each layer can be determined according to specific fireproof design.
When the fireproof coating is sprayed for multiple times, if the upper layer of fireproof coating is not cured, the lower layer of fireproof coating is sprayed, the requirement on the bonding strength cannot be met between the two layers of fireproof coating, the falling is easy to generate, and the finally formed fireproof structure is low in strength. Therefore, when the fireproof paint is sprayed on the steel wire mesh for multiple times to form a plurality of fireproof layers, the lower fireproof layer is sprayed after the upper base layer or the fireproof layer is solidified. This mode of operation can effectively improve the adhesion between flame retardant coating and bottom layer or the flame retardant coating, and then improves fire resistive construction's intensity, effectively prevents the condition of droing in the fire resistive construction later stage. Specifically, the spraying interval time of each time of the fireproof coating is 8-10 hours according to the drying condition.
In order to improve the construction quality, dry weather and seasons are selected as much as possible for construction, the construction environment temperature is preferably between 5 and 38 ℃, the relative humidity is preferably less than or equal to 85 percent, and air is required to circulate. The construction quality is low when the wind speed is more than 5m/s and the dew condensation exists on the surface of the member in rainy days, so the construction is not suitable in the weather conditions.
In one possible implementation, the fireproof paint can be sprayed by a spraying machine, and the distance between a spraying opening of the spraying machine and the surface of the steel structure can be controlled within the range of 20-30cm when the spraying machine sprays the fireproof paint. If the distance between the spraying opening and the surface of the steel structure is too far, the bonding force of the fireproof coating is influenced, and the construction quality of the fireproof coating is reduced; if the distance is too close, the sprayed coating is easy to rebound, and loss is caused. The distance between the spraying opening and the surface of the steel structure can be controlled within the range of 20-30cm, so that the adhesive force of the fireproof coating can be ensured, and the waste of the fireproof coating can be reduced.
In addition, when in spraying, the included angle between the spraying direction of the spraying machine and the surface of the steel structure is controlled within the range of 40-50 degrees, so that the splashing and rebounding of the coating can be reduced to a certain extent.
In order to ensure the effectiveness of the fire-retardant coating, the storage and transportation of the fire-retardant coating need to be strictly controlled. Before the fireproof coating is stored in a factory, the fireproof coating needs to be checked, the package is guaranteed to be free of damage, the barrel cover is well sealed, the product has a certificate, the package has a label, and the fireproof coating is stirred to be uniform and thick without agglomeration. And storing the qualified coating in a dry and ventilated warehouse. The paint is placed in order to prevent wind, rain and sunshine from being exposed.
Before the fireproof coating is constructed, the fireproof coating is opened and checked, the name, the model and the color of the coating are mainly checked, whether the fireproof coating conforms to design rules and selection requirements or not is checked, and whether the manufacturing date exceeds the storage period or not is checked, so that the construction quality is not influenced. The humidity of the fire-retardant coating is adjusted to be in a range suitable for construction requirements when the fire-retardant coating is generally delivered from a factory, and the fire-retardant coating can be used after being stirred by opening a barrel. However, due to the influence of different conditions such as storage conditions, construction methods, working environments, temperature, and the like, water may be added to adjust the viscosity when necessary, and at this time, water may be added to dilute the paint so that the paint does not fall down during spraying.
In one possible implementation, the steel structure includes an external corner, the external corner including two external sides; in the steps of spraying the fireproof paint on the spraying base layer to form the priming layer and spraying the fireproof paint on the steel wire mesh for multiple times to form the multi-layer fireproof layer, the method for spraying the fireproof paint on the exposed corners comprises the following steps: the two male side surfaces are firstly sprayed along the direction parallel to the male side surfaces, and then the male corner is sprayed along the direction vertical to the male side surfaces.
Adopt the external corner of above-mentioned mode spraying steel construction, can prevent effectively that fire prevention coating from flowing and weighing down, make fire prevention coating better fuse in external corner department.
In one possible implementation, the steel structure further comprises an internal corner, the internal corner comprising two internal sides; in the step of spraying the fireproof paint on the spraying base layer to form the priming layer and spraying the fireproof paint on the steel wire mesh for multiple times to form the fireproof layer, the two female side surfaces are firstly sprayed in the direction parallel to the female side surfaces, and then the female corners are sprayed in the direction perpendicular to the female side surfaces.
Adopt the reentrant corner of above-mentioned mode spraying steel construction, can prevent effectively that fire prevention coating from flowing and weighing down, make fire prevention coating better fuse in reentrant corner department.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A construction method of a thick-paste steel structure fireproof coating is characterized by comprising the following steps:
carrying out base layer cleaning on the surface of the steel structure;
spraying intermediate paint on the surface of the steel structure after the base layer is cleaned, so as to obtain a sprayed base layer;
spraying a fireproof coating to the spraying base layer to form a priming layer;
laying a steel wire mesh on the bottom layer;
and spraying the fireproof paint to the steel wire mesh for multiple times to form a multi-layer fireproof layer.
2. The construction method according to claim 1, wherein the steel structure comprises an external corner comprising two external sides;
in the step of spraying the fireproof paint to the spraying base layer to form the priming layer and the step of spraying the fireproof paint to the steel wire mesh for multiple times to form the multi-layer fireproof layer, the method for spraying the fireproof paint to the external corner comprises the following steps:
the two male side surfaces are firstly sprayed in the direction parallel to the male side surfaces, and then the male corners are sprayed in the direction perpendicular to the male side surfaces.
3. The construction method according to claim 1, wherein the steel structure further comprises an internal corner comprising two internal sides;
in the step of spraying the fireproof paint to the spraying base layer to form the priming layer and the step of spraying the fireproof paint to the steel wire mesh for multiple times to form the fireproof layer, the method for spraying the fireproof paint to the internal corner comprises the following steps:
and firstly, spraying two female side surfaces in a direction parallel to the female side surfaces, and then spraying the female corners in a direction perpendicular to the female side surfaces.
4. A construction method according to any one of claims 1 to 3, wherein in the step of spraying the fire retardant coating material to the steel wire mesh in a plurality of times to form a plurality of fire retardant layers, a next fire retardant layer is sprayed after the primer layer or the fire retardant layer on the upper layer is cured.
5. The construction method according to claim 4, wherein the base layer cleaning comprises surface cleaning treatment and rust removing treatment, and the rust removing treatment comprises removing a rust layer and applying a rust preventive paint.
6. The construction method according to claim 4, wherein after obtaining the spray base layer and before forming the primer layer, further comprising:
and mounting nails for mounting the steel wire mesh are adhered to the spraying base layer.
7. The construction method according to claim 4, wherein the intermediate paint is mixed with a quartz sand mixture.
8. The construction method according to claim 4, wherein the density of the fire retardant coating used for spraying the primer layer is greater than the density of the fire retardant coating used for spraying the fire retardant layer.
9. The construction method according to claim 4, wherein the fireproof paint is sprayed by a spraying machine, and the distance between a spraying opening of the spraying machine and the surface of the steel structure is 20-30cm when the spraying machine is used for spraying.
10. The construction method according to claim 9, wherein an angle between a spraying direction of the sprayer and the surface of the steel structure is 40-50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010539774.7A CN111617947A (en) | 2020-06-13 | 2020-06-13 | Construction method of thick-paste steel structure fireproof coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010539774.7A CN111617947A (en) | 2020-06-13 | 2020-06-13 | Construction method of thick-paste steel structure fireproof coating |
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| CN111617947A true CN111617947A (en) | 2020-09-04 |
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| CN202010539774.7A Pending CN111617947A (en) | 2020-06-13 | 2020-06-13 | Construction method of thick-paste steel structure fireproof coating |
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| CN (1) | CN111617947A (en) |
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| CN114535034A (en) * | 2021-12-14 | 2022-05-27 | 上海宝冶集团有限公司 | Anti-drop construction process for thick steel structure fireproof coating |
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| JP2011156762A (en) * | 2010-02-01 | 2011-08-18 | Ohbayashi Corp | Method for manufacturing fire resistant iron member |
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| CN114535034A (en) * | 2021-12-14 | 2022-05-27 | 上海宝冶集团有限公司 | Anti-drop construction process for thick steel structure fireproof coating |
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Application publication date: 20200904 |