CN106497157B - Potassium magnesium phosphate cement base fire-resistant coating for steel structure and preparation method thereof, application method - Google Patents
Potassium magnesium phosphate cement base fire-resistant coating for steel structure and preparation method thereof, application method Download PDFInfo
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- CN106497157B CN106497157B CN201610907654.1A CN201610907654A CN106497157B CN 106497157 B CN106497157 B CN 106497157B CN 201610907654 A CN201610907654 A CN 201610907654A CN 106497157 B CN106497157 B CN 106497157B
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
A kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure and preparation method thereof, application method, it is related to the field of building materials, the fire-resistant coating for steel structure is prepared by the first raw material and water, and the first raw material includes: 47%~53% potassium magnesium phosphate cement-based adhesive powder by mass percentage；5%~11% emergy；37%~45% expanded perlite in powder；And 0.45%~0.55% polypropylene fibre.The fire-resistant coating for steel structure is with potassium magnesium phosphate cement for main adhesive, have the characteristics that setting time is controllable, harden fast, normal temperature cure, being convenient for saving and cost is relatively low, high mechanical strength strong to the adhesive force of steel construction matrix, fire protecting performance is excellent and stable, durability is good.The simple process of the preparation method of the fire-resistant coating for steel structure, raw material sources are abundant, price is lower, energy conservation and environmental protection.By the fire-resistant coating for steel structure layered coated in steel construction, coating layer thickness is small, quick construction is convenient, quick solidifying.
Description
Technical field
The present invention relates to a kind of the field of building materials, and in particular to a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure
And preparation method thereof, application method.
Background technique
Steel construction because intensity is high, from the series of advantages such as heavy and light, shock resistance be good, be widely used in skyscraper, greatly across
Structure and lightweight construction etc. are spent, but fire line difference is that its fatal defect once encountering fire does not take measurements for fire-protection
Construction steel structure will collapse rapidly.In the various measurements for fire-protection for construction steel structure, coated on its surface all kinds of
Fireproof coating is relatively simple easy, reliable and economical and practical method, can significantly improve the fire endurance of steel construction.Steel construction
Fireproof coating can be divided into organic expander type, inorganic non-expansion type and organic-inorganic composite three classes by the property of base-material used.
One, the Intumescent Retardant System of organic expander type fireproof coating is mostly P-N system, although such fireproof coating meets fire
Generating expansion can shield to substrate, but fire-retardant composition therein may burn and release such as NH3, HCN, halogenation
Hydrogen, NOx, CO, Cl2、Br2Equal toxic gases can generate harm to the personnel for not fleeing from the scene of a fire and fire fighter, and such is anti-
The problems such as organic components in fiery coating are exposed in air for a long time, can generate decomposition, degradation, aging.
Two, based on thicker, thickness changes inorganic non-expansion type fireproof coating within the scope of 8~50mm, meet fire when according to
Heat-insulating material in such fireproof coating prevents the transmitting of heat from protecting substrate.Such fireproof coating is mostly that Inorganic water-soluble is anti-
Fiery coating, fire endurance temperature is higher, and when burning does not generate toxic gas and smog, and inorganic component can resist external environment
Long-term erosion, environment friendly and durability are superior to organic expander type fireproof coating.
Inorganic water-soluble fireproof coating by main adhesive (major ingredient), auxiliary adhesive (auxiliary material), fire retardant, swelling agent and its
His some auxiliary agents composition, wherein main adhesive, auxiliary adhesive be influence Inorganic water-soluble fireproof coating comprehensive performance it is main because
Element, currently used adhesive have silicate series adhesive, aluminate serial adhesive and series of phosphate adhesive.Silicic acid
The adhesion strength of salt series adhesive is high, heat-resisting, water resistance is preferable, but alkaline resistance properties is poor, and solidification temperature is higher；Use aluminium
The fireproof coating that hydrochlorate series adhesive obtains then has that aluminate hydrated product is also easy to produce crystal transfer, cause using
Under state the problems such as Strength Failure；In comparison, series of phosphate adhesive has water-tolerant, cure shrinkage small and high temperature
The advantages that intensity is high, but there are still condense fast, low-temperature setting, be not easy to the defects of saving and is at high cost.
With the environmental problem for being gradually expanded and becoming increasingly conspicuous of steel construction application range, fire-resistant coating for steel structure is wanted
It asks and is also increasingly stringenter, developmental research flame retardant property protrusion, multifunction, environmental protection and fireproof coating with long service life are development
Trend.In above-mentioned fireproof coating, the performance of the fireproof coating obtained using series of phosphate adhesive is relatively preferable, but still
The problems such as in the presence of condensing fast, low-temperature setting, being not easy to preservation and is at high cost.
Summary of the invention
The purpose of the present invention is to provide a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structures, are with potassium magnesium phosphate cement
Main adhesive has the characteristics that setting time is controllable, hardens fast, normal temperature cure, being convenient for saving and cost is relatively low, to steel construction
The adhesive force of matrix is strong, high mechanical strength, fire protecting performance is excellent and stable, durability is good.
Another object of the present invention is to provide a kind of preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure, works
Skill is simple, raw material sources are abundant, price is lower, energy conservation and environmental protection.
Another object of the present invention is to provide a kind of application methods of potassium magnesium phosphate cement base fire-resistant coating for steel structure, apply
Thickness degree is small, quick construction is convenient, quick solidifying.
The present invention solves its technical problem and adopts the following technical solutions to realize.
The present invention proposes a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, is prepared by the first raw material and water,
By mass percentage, the first raw material includes:
Wherein, potassium magnesium phosphate cement-based adhesive powder is prepared by the second raw material, and by mass percentage, second is former
Material includes:
Further, in a preferred embodiment of the present invention, steel-making slag powder is obtained by vessel slag is levigate, and fineness is 48~75
μm。
Further, in a preferred embodiment of the present invention, the fineness of emergy be 850~710 μm, density be 3.95~
3.97g/cm3, wherein Al2O3Mass fraction >=95%.
Further, in a preferred embodiment of the present invention, the fineness of expanded perlite in powder is 1.2~3mm, and density is
200~300kg/m3, thermal coefficient is 0.066~0.074W/ (mK).
Further, in a preferred embodiment of the present invention, polypropylene fibre is disorderly to chopped polypropylene fibre, and polypropylene is fine
Long 3~6mm is tieed up, diameter is 20~30 μm.
Further, in a preferred embodiment of the present invention, by mass percentage, potassium magnesium phosphate cement includes:
Dead roasting magnesia powder 46%~49%；
Potassium dihydrogen phosphate 44%~46%；And
Compound retarder 7%~8%.
A kind of preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure comprising following steps:
Percentage, weighs 87%~92% potassium magnesium phosphate cement, 7.5%~12.5% steel-making slag powder, and 0.45%
~0.67% titanium dioxide and 0.05%~0.10% air entraining agent are uniformly mixed and obtain potassium magnesium phosphate cement-based adhesive powder
Material；
Percentage weighs 47%~53% potassium magnesium phosphate cement-based adhesive powder, 5%~11% corundum
Sand, 37%~45% expanded perlite in powder and 0.45%~0.55% polypropylene fibre；
Expanded perlite in powder is put into blender and is persistently stirred, stirring is put into potassium magnesium phosphate to there is the exudation of part water
Cement-based adhesive powder, is stirred until homogeneous, and emergy and polypropylene fibre is added, and water is added while stirring and adjusts in blender
The consistency of mixture slurry, until mixture slurry is uniform.
It further, in a preferred embodiment of the present invention, first will expansion treasure before expanded perlite in powder being put into blender
Zhu Yan is soaked in water to water suction saturation, and taking-up is dried in the air to saturated dry surface.
Further, in a preferred embodiment of the present invention, after mixture slurry is uniform, continue 0.5~2min of stirring.
A kind of application method of potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically comprises the following steps:
It clears up and sprays water and soak steel matrix surface, anhydrous wait dry steel matrix surface, points 3~4 times by potassium magnesium phosphate water
Mud base fire-resistant coating for steel structure is applied to steel matrix surface, and gained coating layer thickness is 15~25mm.
Potassium magnesium phosphate cement base fire-resistant coating for steel structure of the embodiment of the present invention and preparation method thereof, application method it is beneficial
Effect is: the potassium magnesium phosphate cement base fire-resistant coating for steel structure is prepared by the first raw material and water, and the first raw material presses quality hundred
Score meter includes: 47%~53% potassium magnesium phosphate cement-based adhesive powder；5%~11% emergy；37%~45% expansion
Perlite bulk cargo；And 0.45%~0.55% polypropylene fibre.Wherein, potassium magnesium phosphate cement-based adhesive powder presses quality hundred
Score meter includes: 87%~92% potassium magnesium phosphate cement；7.5%~12.5% steel-making slag powder；0.45%~0.67% titanium dioxide；
And 0.05%~0.10% air entraining agent.The potassium magnesium phosphate cement base fire-resistant coating for steel structure is with potassium magnesium phosphate cement for main gluing
Agent has the characteristics that setting time is controllable, hardens fast, normal temperature cure, being convenient for saving and cost is relatively low, to steel construction matrix
Adhesive force is strong, high mechanical strength, fire protecting performance is excellent and stabilization (fire endurance temperature is high, high-temperature stability is good), durability are good.
The simple process of the preparation method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, raw material sources are abundant, price is lower, energy saving
Environmental protection.When using the potassium magnesium phosphate cement base fire-resistant coating for steel structure, coating layer thickness is small, quick construction is convenient, quick solidifying.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is preparation method and the user of potassium magnesium phosphate cement base fire-resistant coating for steel structure provided in an embodiment of the present invention
The process flow chart of method.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Below to potassium magnesium phosphate cement base fire-resistant coating for steel structure of the embodiment of the present invention and preparation method thereof, application method
It is specifically described.
The embodiment of the present invention provides a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, is prepared by the first raw material and water
It obtains, by mass percentage, the first raw material includes: 47%~53% potassium magnesium phosphate cement-based adhesive powder；5%~11%
Emergy；37%~45% expanded perlite in powder；And 0.45%~0.55% polypropylene fibre.First raw material preferably wraps
It includes: 50% potassium magnesium phosphate cement-based adhesive powder；10.5% emergy；39% expanded perlite in powder；And 0.5% poly- third
Alkene fiber.
Wherein, potassium magnesium phosphate cement-based adhesive powder is prepared by the second raw material, and by mass percentage, second is former
Material includes: 87%~92% potassium magnesium phosphate cement；7.5%~12.5% steel-making slag powder；0.45%~0.67% titanium dioxide；And
0.05%~0.10% air entraining agent.Second raw material preferably includes: 89% potassium magnesium phosphate cement；10.4% steel-making slag powder；0.5% dioxy
Change titanium；And 0.1% air entraining agent.In the second raw material, potassium magnesium phosphate cement includes: 46~49% dead roastings by mass percentage
Magnesia powder；44~46% potassium dihydrogen phosphates；And 7~8% compound retarders, it preferably includes: 48% dead roasting magnesia powder；
44.5% potassium dihydrogen phosphate；And 7.5% compound retarder.Steel-making slag powder is obtained by vessel slag is levigate, and fineness is 48~75 μ
M, i.e. 200~300 mesh.It is controllable newly to mix the solidifying of potassium magnesium phosphate cement slurry by adjusting the composition and volume of compound retarder
The time is tied in 20~60min, the heat of hydration divides the two-stage to discharge, and solves the problems, such as newly to mix the fast solidifying of potassium magnesium phosphate cement slurry.
Wherein, emergy is mostly used white fused alumina sand, and the fineness of emergy is 850~710 μm, and density is 3.95~3.97g/
cm3, wherein Al2O3Mass fraction >=95%.
Wherein, the fineness of expanded perlite in powder is 1.2~3mm, and density is 200~300kg/m3, thermal coefficient is
0.066~0.074W/ (mK).
Wherein, polypropylene fibre is disorderly to chopped polypropylene fibre, and the long 3~6mm of polypropylene fibre, diameter is 20~30 μ
m。
Potassium magnesium phosphate cement is one of series of phosphate adhesive, is pressed by dead roasting magnesia, potassium phosphate and additive etc.
It is made according to certain proportion, the corresponding slurry of potassium magnesium phosphate cement is raw by soda acid chemical reaction and physical action in acid condition
It is the adhesive for cohering phase at phosphate.Moreover, potassium magnesium phosphate cement passes through chemical bonds at normal temperature, has silicate
The main feature of cement and ceramic material, i.e. normal temperature cure, fast hard (hardening is fast), high early strong (early strength is high), volume stability
Property it is high, caking property is strong the features such as.Fast hard, the high early powerful feature of potassium magnesium phosphate cement can make up silicates adhesive curing time
Defect that is long and need to conserving, in addition, soluble phosphate in potassium magnesium phosphate cement can in conjunction with the ferro element of steel structure surface,
One layer of fine and close phosphoric acid iron compound protective layer is formed, steel structure surface can be both protected, avoid corroding, and enhance potassium phosphate
Magnesium cement base coating can overcome inorganic thicker coating and base's poor adhesive force and flaky lack in the adhesive force of steel structure surface
It falls into；Further, the primary raw material of potassium magnesium phosphate cement --- dead roasting magnesia powder inherently refractory material, hardenite
With preferable fire-proof high-temperature resistant performance.
In view of potassium magnesium phosphate cement excellent performance, the present embodiment can make steel knot using potassium magnesium phosphate cement as main adhesive
Structure fireproof coating slurry quick-hardening, and improve the adhesion strength of fire-resistant coating for steel structure and steel matrix；Use steel-making slag powder as changing
Property mineral admixture, can be improved the early strength of fire-resistant coating for steel structure and to improve its volume stability, thermal stability and water steady
It is qualitative；It uses titanium dioxide, air entraining agent as auxiliary agent, titanium dioxide can be used to introduce as infrared reflective material and by air entraining agent micro-
Small closed air bubbles, the powder particles of dispersion and lubrication fire-resistant coating for steel structure, improve water-retaining property, the thixotroping of fire-resistant coating for steel structure
Property, reduce its dry density and thermal conductivity；Make filler with emergy, volume stability and the heat that fire-resistant coating for steel structure can be improved are steady
It is qualitative；Make filler with expanded perlite in powder, the dry density of fire-resistant coating for steel structure can be reduced, improve its heat-insulating capability；Pass through
Appropriate polypropylene fibre is mixed, the cracking resistance of potassium magnesium phosphate cement base fire-resistant coating for steel structure can be improved.The potassium phosphate developed
Magnesium cement base fire-resistant coating for steel structure is controllable with setting time, hardening is fast, normal temperature cure, is convenient for preservation and lower-cost spy
Point, high mechanical strength strong to the adhesive force of steel construction matrix, fire protecting performance is excellent and stablizes (fire endurance temperature height, high temperature
Stability is good), durability it is good.
Shown in Figure 1, the embodiment of the present invention also provides a kind of preparation of potassium magnesium phosphate cement base fire-resistant coating for steel structure
Method comprising following steps:
S1, percentage, weigh 87%~92% potassium magnesium phosphate cement, 7.5%~12.5% steel-making slag powder,
0.45%~0.67% titanium dioxide and 0.05%~0.10% air entraining agent are uniformly mixed and obtain potassium magnesium phosphate cement base rubber
Stick powder；In the present embodiment, potassium magnesium phosphate cement is by 46~49% dead roasting magnesia powders by mass percentage；44~
46% potassium dihydrogen phosphate；And 7~8% compound retarder dry be uniformly mixed to obtain.
S2, percentage weigh 47%~53% potassium magnesium phosphate cement-based adhesive powder, and 5%~11% just
Beautiful sand, 37%~45% expanded perlite in powder and 0.45%~0.55% polypropylene fibre (PVC fiber).
S3, in advance by expanded perlite in powder be soaked in water to water suction be saturated, taking-up dry in the air it is spare to saturated dry surface,
By treated, expanded perlite in powder is put into the cement plaster blender of adjustable speed persistently stirs, and is mixed slowly to there is part
Water (20%~30% of total water percolating capacity) exudation, the revolving speed mixed slowly are 140 ± 5 turns/min, are put into potassium magnesium phosphate cement base
Adhesive powder mixes slowly 0.5~2min to uniform, continues to mix slowly, and emergy and poly- is added slowly in 20~40S
Suitable quantity of water is added while stirring and adjusts the consistency of mixture slurry in blender to 130 ± 5mm, mixture slurry for tacryl
Uniformly, then quickly 0.5~2min of stirring, the revolving speed quickly stirred are 285 ± 10 turns/min, obtain potassium magnesium phosphate cement base steel knot
Structure fireproof coating, i.e. potassium magnesium phosphate cement base fire-resistant coating for steel structure slurry.
Therefore, the preparation of the fire-resistant coating for steel structure can be divided into three phases by the embodiment of the present invention: the first stage is phosphorus
The preparation of sour potassium magnesium cement, second stage are the preparation of potassium magnesium phosphate cement-based adhesive powder, and the phase III is potassium magnesium phosphate
The preparation of cement base fire-resistant coating for steel structure.
Shown in Figure 1, the embodiment of the present invention also provides a kind of use of potassium magnesium phosphate cement base fire-resistant coating for steel structure
Method specifically comprises the following steps:
It clears up and sprays water and soak steel matrix surface, anhydrous wait dry steel matrix surface, points 3~4 times by above-mentioned potassium phosphate
Magnesium cement base fire-resistant coating for steel structure is applied to steel matrix surface, and gained coating layer thickness is 15~25mm.
Since the potassium magnesium phosphate cement base fire-resistant coating for steel structure is using potassium magnesium phosphate cement as main adhesive potassium phosphate
Magnesium cement base fire-resistant coating for steel structure, working performance is good, and surface drying time is short, can increase substantially construction efficiency；The potassium phosphate
Magnesium cement base fire-resistant coating for steel structure will not generate toxic, pernicious gas pollution environment in production, construction and combustion process；It should
Potassium magnesium phosphate cement base fire-resistant coating for steel structure and steel matrix adhesive force are strong, and fire resistance is high, there is fire prevention and anti-corrosion double effects.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Embodiment 1 provides a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, by potassium magnesium phosphate cement-based adhesive
Powder, filler (emergy and expanded perlite in powder), anti-crack fiber (disorderly to chopped PVC fiber) and water mix, specifically
It is made according to following procedure:
87.5kg potassium magnesium phosphate cement is weighed (by 41kg dead roasting magnesia, 40kg potassium dihydrogen phosphate, the compound slow setting of 6.5kg
Agent composition), 12kg steel-making slag powder, 0.45kg titanium dioxide, 0.05kg air entraining agent, be uniformly mixed obtain potassium magnesium phosphate cement base gluing
Agent powder.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powder of 52kg, 10.5kg emergy, 37kg expanded perlite in powder
With 0.5kg disorderly to chopped PVC fiber, expanded perlite in powder is soaked in water to water suction and is saturated, taking-up is dried in the air dry to saturation plane
State is spare.
Processed expanded perlite in powder is put into the cement plaster blender of adjustable speed, is mixed slowly precious to expansion
Part water exudation in pearl rock bulk cargo, is put into potassium magnesium phosphate cement-based adhesive powder, mixes slowly 2min to uniform, place into
White fused alumina sand is with disorderly to chopped PVC fiber, while mixing slowly, the consistency that suitable quantity of water adjusts slurry is added in side, mixes slowly slurry
To quick stirring 1min again after uniformly, obtain meeting the potassium magnesium phosphate cement base fire-resistant coating for steel structure slurry of construction requirement consistency
Body.
The application method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically comprises the following steps:
It clears up and sprays water and soak steel matrix surface, it is anhydrous to surface wait dry, with prepared potassium magnesium phosphate cement base steel
4 smearing steel matrix surfaces of structure fire coating paste point, gained coating layer thickness are 20mm.In 20 ± 5 DEG C, 50 ± 10%RH ring
Natural curing coating 15d under border.
It is anti-to the potassium magnesium phosphate cement base steel construction in the present embodiment according to GB14907-2002 " fire-resistant coating for steel structure "
The basic performance of fiery coating is tested, and the results are shown in Table 1.
The performance of potassium magnesium phosphate cement base fire-resistant coating for steel structure in 1 embodiment 1 of table
Embodiment 2
Embodiment 2 provides a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, by potassium magnesium phosphate cement-based adhesive
Powder, filler (emergy and expanded perlite in powder), anti-crack fiber (disorderly to chopped PVC fiber) and water mix, specifically
It is made according to following procedure:
Weigh 87.5kg potassium magnesium phosphate cement (42kg dead roasting magnesia, 40kg potassium dihydrogen phosphate, the compound slow setting of 5.5kg
Agent), 12kg steel-making slag powder, 0.45kg titanium dioxide, 0.05kg air entraining agent, be uniformly mixed obtain potassium magnesium phosphate cement-based adhesive powder
Material.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powder of 49kg, 5.5kg emergy, 45kg expanded perlite in powder and
0.5kg disorderly to chopped PVC fiber, takes expanded perlite in powder to be soaked in water to water suction saturation, taking-up is dried in the air to the dry shape of saturation plane
State is spare.
Processed expanded perlite in powder is put into the cement plaster blender of adjustable speed and is mixed slowly to expansion treasure
Part water exudation in pearl rock bulk cargo, is put into potassium magnesium phosphate cement-based adhesive powder, mixes slowly 2min to uniform, place into
White fused alumina sand is with disorderly to chopped PVC fiber, while mixing slowly, the consistency that suitable quantity of water adjusts slurry is added in side, mixes slowly slurry
To uniformly after again quickly stirring 1min, obtain the potassium magnesium phosphate cement base fire-resistant coating for steel structure for meeting construction requirement consistency.
The application method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically comprises the following steps:
It clears up and sprays water and soak steel matrix surface, it is anhydrous to surface wait dry, with prepared potassium magnesium phosphate cement base steel
Structure fire coating paste, which divides 3 times, is applied to steel matrix surface, and gained coating layer thickness is 25mm.In 20 ± 5 DEG C, 50 ± 10%RH
Natural curing coating 15d under environment.
It is anti-to the potassium magnesium phosphate cement base steel construction in the present embodiment according to GB14907-2002 " fire-resistant coating for steel structure "
The basic performance of fiery coating is tested, and the results are shown in Table 2.
The performance of potassium magnesium phosphate cement base fire-resistant coating for steel structure in 2 embodiment 2 of table
Embodiment 3
Embodiment 3 provides a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, is specifically made according to following procedure:
90.5kg potassium magnesium phosphate cement is weighed (by 44kg dead roasting magnesia, 40kg potassium dihydrogen phosphate, the compound slow setting of 6.5kg
Agent composition), 8kg steel-making slag powder, 0.45kg titanium dioxide, 0.05kg air entraining agent, be uniformly mixed obtain potassium magnesium phosphate cement base gluing
Agent powder.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powder of 51kg, 7.5kg emergy, 41kg expanded perlite in powder and
0.5kgPVC fiber takes expanded perlite in powder to be soaked in water to water suction saturation, and taking-up is dried in the air spare to saturated dry surface.
Processed expanded perlite in powder is put into the cement plaster blender of adjustable speed and is mixed slowly to expansion treasure
Part water exudation in pearl rock bulk cargo, is put into potassium magnesium phosphate cement-based adhesive powder, mixes slowly 2min to uniform, place into
White fused alumina sand is with disorderly to chopped PVC fiber, while mixing slowly, the consistency that suitable quantity of water adjusts slurry is added in side, mixes slowly slurry
To uniformly after again quickly stirring 1min, obtain the potassium magnesium phosphate cement base fire-resistant coating for steel structure for meeting construction requirement consistency.
The application method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically comprises the following steps:
It clears up and sprays water and soak steel matrix surface, it is anhydrous to surface wait dry, with prepared potassium magnesium phosphate cement base steel
Structure fire coating paste, which divides 3 times, is applied to steel matrix surface, and gained coating layer thickness is 15mm.In 20 ± 5 DEG C, 50 ± 10%RH
Natural curing coating 15d under environment.
It is anti-to the potassium magnesium phosphate cement base steel construction in the present embodiment according to GB14907-2002 " fire-resistant coating for steel structure "
The basic performance of fiery coating is tested, and the results are shown in Table 3.
The performance of potassium magnesium phosphate cement base fire-resistant coating for steel structure in 3 embodiment 3 of table
Embodiment 4
Embodiment 4 provides a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, is specifically made according to following procedure:
89kg potassium magnesium phosphate cement is weighed (by 43kg dead roasting magnesia, 39.5kg potassium dihydrogen phosphate, the compound slow setting of 6.5kg
Agent composition), 10.4kg steel-making slag powder, 0.5kg titanium dioxide, 0.1kg air entraining agent, be uniformly mixed obtain potassium magnesium phosphate cement base gluing
Agent powder.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powder of 50kg, 10.5kg emergy, 39kg expanded perlite in powder
With 0.5kg PVC fiber, expanded perlite in powder is taken to be soaked in water to water suction saturation, taking-up is dried in the air standby to saturated dry surface
With.
Processed expanded perlite in powder is put into the cement plaster blender of adjustable speed and is mixed slowly to expansion treasure
Part water exudation in pearl rock bulk cargo, is put into potassium magnesium phosphate cement-based adhesive powder, mixes slowly 2min to uniform, place into
White fused alumina sand is with disorderly to chopped PVC fiber, while mixing slowly, the consistency that suitable quantity of water adjusts slurry is added in side, mixes slowly slurry
To uniformly after again quickly stirring 1min, obtain the potassium magnesium phosphate cement base fire-resistant coating for steel structure for meeting construction requirement consistency.
The application method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically comprises the following steps:
It clears up and sprays water and soak steel matrix surface, it is anhydrous to surface wait dry, with prepared potassium magnesium phosphate cement base steel
Structure fire coating paste, which divides 4 times, is applied to steel matrix surface, and gained coating layer thickness is 15mm.In 20 ± 5 DEG C, 50 ± 10%RH
Natural curing coating 15d under environment.
It is anti-to the potassium magnesium phosphate cement base steel construction in the present embodiment according to GB14907-2002 " fire-resistant coating for steel structure "
The basic performance of fiery coating is tested, and the results are shown in Table 4.
The performance of potassium magnesium phosphate cement base fire-resistant coating for steel structure in 4 embodiment 4 of table
It is coated it can be seen from table 1- table 4 using the potassium magnesium phosphate cement base fire-resistant coating for steel structure of the embodiment of the present invention
When steel construction, drying time is short, initial stage crack resistance is good, excellent fire retarding performance.
In conclusion the potassium magnesium phosphate cement base fire-resistant coating for steel structure of the embodiment of the present invention is based on potassium magnesium phosphate cement
Adhesive has the characteristics that setting time is controllable, hardens fast, normal temperature cure, being convenient for saving and cost is relatively low, to steel construction base
The adhesive force of body is strong, high mechanical strength, fire protecting performance is excellent and stablizes (fire endurance temperature is high, high-temperature stability is good), durable
Property is good.The simple process of the preparation method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, raw material sources are abundant, price compared with
Low, energy conservation and environmental protection.When using the potassium magnesium phosphate cement base fire-resistant coating for steel structure, coating layer thickness is small, quick construction is convenient and solid
Change fast.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (7)
1. a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, which is characterized in that it is prepared by the first raw material and water, is pressed
Mass percentage, first raw material include:
Wherein, the potassium magnesium phosphate cement-based adhesive powder is prepared by the second raw material, by mass percentage, described
Two raw materials include:
By mass percentage, the potassium magnesium phosphate cement includes:
Dead roasting magnesia powder 46%~49%；
Potassium dihydrogen phosphate 44%~46%；And
Compound retarder 7%~8%.
2. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, which is characterized in that the steel-making slag powder is
It is obtained by vessel slag is levigate, fineness is 48~75 μm.
3. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, which is characterized in that the emergy
Fineness is 850~710 μm, and density is 3.95~3.97g/cm3, wherein Al2O3Mass fraction >=95%.
4. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, which is characterized in that the expanded pearlite
The fineness of rock bulk cargo is 1.2~3mm, and density is 200~300kg/m3, thermal coefficient is 0.066~0.074W/ (mK).
5. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, which is characterized in that the polypropylene is fine
Dimension is disorderly to chopped polypropylene fibre, the long 3~6mm of the polypropylene fibre, diameter is 20~30 μm.
6. a kind of preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure as described in claim 1, which is characterized in that
Itself the following steps are included:
Percentage, weighs 87%~92% potassium magnesium phosphate cement, 7.5%~12.5% steel-making slag powder, 0.45%~
0.67% titanium dioxide and 0.05%~0.10% air entraining agent are uniformly mixed and obtain potassium magnesium phosphate cement-based adhesive powder；
Percentage weighs 47%~53% potassium magnesium phosphate cement-based adhesive powder, 5%~11% corundum
Sand, 37%~45% expanded perlite in powder and 0.45%~0.55% polypropylene fibre；
Before the expanded perlite in powder is put into blender, first the expanded perlite is soaked in water to water suction and is saturated,
Taking-up is dried in the air to saturated dry surface, and the expanded perlite in powder is put into blender and is persistently stirred, and stirring is to there is part water
Exudation, is put into the potassium magnesium phosphate cement-based adhesive powder, is stirred until homogeneous, and the emergy is added and the polypropylene is fine
The consistency that water adjusts mixture slurry in the blender is added in dimension while stirring, until the mixture slurry is uniform.
7. the preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 6, which is characterized in that institute
State mixture slurry it is uniform after, continue 0.5~2min of stirring.
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