CN106497157A - Potassium magnesium phosphate cement base fire-resistant coating for steel structure and preparation method thereof, using method - Google Patents
Potassium magnesium phosphate cement base fire-resistant coating for steel structure and preparation method thereof, using method Download PDFInfo
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- CN106497157A CN106497157A CN201610907654.1A CN201610907654A CN106497157A CN 106497157 A CN106497157 A CN 106497157A CN 201610907654 A CN201610907654 A CN 201610907654A CN 106497157 A CN106497157 A CN 106497157A
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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
- 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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- 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
- 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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- C—CHEMISTRY; METALLURGY
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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, using method, are related to building material field, and the fire-resistant coating for steel structure is prepared by the first raw material and water, and the first raw material includes by mass percentage：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.Fire-resistant coating for steel structure adhesive based on potassium magnesium phosphate cement, there is controllable setting time, hardening fast, normal temperature cure, be easy to preserve and lower-cost feature, its adhesive force to steel construction matrix is strong, high mechanical strength, fire protecting performance are excellent and stable, good endurance.The process is simple of the preparation method of the fire-resistant coating for steel structure, abundant raw material source, price are relatively low, energy-conserving and environment-protective.By the fire-resistant coating for steel structure layered coated in steel construction, coating layer thickness is little, quick construction is convenient, quick solidifying.
Description
Technical field
A kind of the present invention relates to building material field, and more particularly to a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure
And preparation method thereof, using method.
Background technology
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
Degree structure and lightweight construction etc., but fire line difference is its fatal defect, once running into fire, does not take measurements for fire-protection
Construction steel structure will cave in rapidly.In the various measurements for fire-protection for construction steel structure, all kinds of in its surface coating
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, three class of inorganic non-expansion type and organic-inorganic composite by the property of base-material used.
First, the Intumescent Retardant System of organic expander type fireproof coating is mostly P-N systems, although fire met by such fireproof coating
Produce expansion to shield base material, but fire-retardant composition therein may burn and discharge such as NH3, HCN, halogenation
Hydrogen, NOx, CO, Cl2、Br2Deng toxic gas, the personnel and fire fighter that do not flee from the scene of a fire can be produced with harm, and such is anti-
Organic components in fiery coating are exposed in air for a long time, can produce decomposition, degraded, aging the problems such as.
2nd, inorganic non-expansion type fireproof coating is based on thicker, and its thickness changes in the range of 8～50mm, when meeting fire according to
Hot transmission is prevented by the heat-insulating material in such fireproof coating to protect base material.Such fireproof coating mostly is Inorganic water-soluble to be prevented
Fiery coating, its fire endurance temperature are higher, do not produce toxic gas and smog, and inorganic component can resist external environment during burning
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
He some auxiliary agents compositions, wherein main adhesive, auxiliary adhesive be affect Inorganic water-soluble fireproof coating combination property main because
Element, the adhesive that commonly uses at present have silicate series adhesive, aluminate serial adhesive and series of phosphate adhesive.Silicic acid
The adhesion strength of salt series adhesive is high, and 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 is obtained then has that aluminate hydrated product is also easy to produce crystal transfer, causes to use
Under state the problems such as Strength Failure；Comparatively speaking, series of phosphate adhesive has water-tolerant, cure shrinkage little and high temperature
The advantages of intensity is high, but still suffer from condensing fast, low-temperature setting, be not easy to the defects such as preservation and cost height.
With the environmental problem for gradually expanding and becoming increasingly conspicuous of steel construction range of application, fire-resistant coating for steel structure is wanted
Ask also increasingly stricter, the fireproof coating of developmental research fire resistance protrusion, multifunction, environmental protection and long service life is development
Trend.In above-mentioned fireproof coating, the performance of the fireproof coating obtained using series of phosphate adhesive is relatively preferable, but still
There are problems that condensing fast, low-temperature setting, be not easy to preserve and.
Content of the invention
It is an object of the invention to provide a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, with potassium magnesium phosphate cement is
Main adhesive, with setting time is controllable, hardening fast, normal temperature cure, is easy to preserve and lower-cost feature, and which is to steel construction
The adhesive force of matrix is strong, high mechanical strength, fire protecting performance are excellent and stable, good endurance.
Another object of the present invention is to providing a kind of preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure, work
Skill is simple, abundant raw material source, price are relatively low, energy-conserving and environment-protective.
Another object of the present invention is to providing a kind of using method of potassium magnesium phosphate cement base fire-resistant coating for steel structure, apply
Thickness degree is little, quick construction convenient, quick solidifying.
The present invention solves its technical problem and employs the following technical solutions to realize.
The present invention proposes a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, and which 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 present pre-ferred embodiments, steel-making slag powder is obtained by vessel slag is levigate, and its fineness is 48～75
μm.
Further, in present pre-ferred embodiments, the fineness of emergy is 850～710 μm, density is 3.95～
3.97g/cm3, wherein Al2O3Mass fraction >=95%.
Further, in present pre-ferred embodiments, the fineness of expanded perlite in powder is 1.2～3mm, and density is
200～300kg/m3, thermal conductivity factor is 0.066～0.074W/ (m K).
Further, in present pre-ferred embodiments, to chopped polypropylene fibre, polypropylene is fine for disorderly for polypropylene fibre
Long 3～the 6mm of dimension, a diameter of 20～30 μm.
Further, in present pre-ferred embodiments, 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, which comprises the 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 well 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 in mixer and is persistently stirred, stirred to there is part water to ooze out, be put into potassium magnesium phosphate
Cement-based adhesive powder, is stirred until homogeneous, and adds emergy and polypropylene fibre, adds water to adjust in mixer while stirring
The denseness of compound slurry, until compound slurry is uniform.
Further, in present pre-ferred embodiments, expanded perlite in powder is put into before mixer, first will be precious for expansion
Zhu Yan is soaked in water to water suction saturation, is taken out and is dried in the air to saturated dry surface.
Further, in present pre-ferred embodiments, after compound slurry is uniform, continue 0.5～2min of stirring.
A kind of using method of potassium magnesium phosphate cement base fire-resistant coating for steel structure, which specifically includes following steps：
Clear up and spray water wetting steel matrix surface, wait to dry steel matrix surface anhydrous, 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, using method 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 quality hundred pressed by the first raw material
Fraction 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, quality hundred pressed by potassium magnesium phosphate cement-based adhesive powder
Fraction 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 gluing based on potassium magnesium phosphate cement
Agent, with setting time is controllable, hardening fast, normal temperature cure, is easy to preserve and lower-cost feature, and which is to steel construction matrix
Adhesive force is strong, high mechanical strength, fire protecting performance excellent and stable (fire endurance temperature is high, high-temperature stability is good), good endurance.
The process is simple of the preparation method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, abundant raw material source, price are relatively low, energy-conservation
Environmental protection.During using the potassium magnesium phosphate cement base fire-resistant coating for steel structure, coating layer thickness is little, quick construction is convenient, quick solidifying.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by to be used attached needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure provided in an embodiment of the present invention and user
The process chart of method.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention is clearer, below will be to the embodiment of the present invention in
Technical scheme be clearly and completely described.In embodiment, unreceipted actual conditions person, builds according to normal condition or manufacturer
The condition of view is carried out.Agents useful for same or the unreceipted production firm person of instrument, are the conventional product that can pass through that commercially available purchase is obtained
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, using 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, and which is prepared by the first raw material and water
Obtain, 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 is preferably wrapped
Include：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 is preferably included：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 by mass percentage：46～49% dead roastings
Magnesia powder；44～46% potassium dihydrogen phosphates；And 7～8% compound retarders, preferably include：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 its fineness is 48～75 μ
M, i.e. 200～300 mesh.By adjusting the composition and volume of compound retarder, controllable newly mixes the solidifying of potassium magnesium phosphate cement slurry
The knot time, in 20～60min, the release of the heat of hydration point two-stage, solves the solidifying soon problem for newly mixing potassium magnesium phosphate cement slurry.
Wherein, the multiplex white fused alumina sand of emergy, 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 conductivity factor is
0.066～0.074W/ (m K).
Wherein, polypropylene fibre for disorderly to chopped polypropylene fibre, polypropylene fibre 3～6mm of length, a diameter of 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.
Make according to certain proportion, the corresponding slurry of potassium magnesium phosphate cement is given birth to by soda acid chemical reaction and physical action in acid condition
Into taking phosphate as the adhesive that coheres phase.And, potassium magnesium phosphate cement by chemical bonds, possesses silicate at normal temperatures
Cement and the main feature of ceramic material, i.e. normal temperature cure, fast hard (hardening is fast), high early strong (early strength is high), volume stability
Property high, the features such as caking property is strong.Fast hard, the high morning powerful feature of potassium magnesium phosphate cement can make up silicates adhesive hardening time
Defect that is long and need to conserving, in addition, the soluble phosphate in potassium magnesium phosphate cement can be combined 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 have both been protected, it is to avoid corrosion, and enhanced potassium phosphate again
Adhesive force of the magnesium cement base coating in steel structure surface, can overcome inorganic thicker coating and basic unit's poor adhesive force and flaky lack
Fall into；Further, the primary raw material dead roasting magnesia powder inherently refractory material of potassium magnesium phosphate cement, its hardenite
There is preferable fire-proof high-temperature resistant performance.
In view of potassium magnesium phosphate cement premium properties, the present embodiment ties can steel 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；With steel-making slag powder as changing
Property mineral admixture, can improve the early strength of fire-resistant coating for steel structure and to improve its volume stability, heat endurance and water steady
Qualitative；With titanium dioxide, air entraining agent as auxiliary agent, can be introduced as infrared reflective material and by air entraining agent with titanium dioxide micro-
The powder particles of little CAB, 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 can improve fire-resistant coating for steel structure is steady
Qualitative；Make filler with expanded perlite in powder, it is possible to decrease the dry density of fire-resistant coating for steel structure, 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 that develops
Magnesium cement base fire-resistant coating for steel structure has controllable setting time, hardening fast, normal temperature cure, is easy to preserve and lower-cost spy
Point, its adhesive force to steel construction matrix is strong, excellent and stable (fire endurance temperature is high, high temperature for high mechanical strength, fire protecting performance
Good stability), good endurance.
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, its are comprised the 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 well 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% dry being uniformly mixed of compound retarder obtain.
S2, percentage, weigh 47%～53% potassium magnesium phosphate cement-based adhesive powder, and 5%～11% is firm
Beautiful sand, 37%～45% expanded perlite in powder, and 0.45%～0.55% polypropylene fibre (PVC fibers).
S3, in advance by expanded perlite in powder be soaked in water to water suction saturation, take out dry in the air standby to saturated dry surface,
Expanded perlite in powder after by process is put in the cement plaster blender of adjustable speed and persistently stirs, and low rate mixing is to there is part
Water (the 20%～30% of total water percolating capacity) oozes out, and the rotating speed of low rate mixing is 140 ± 5 turns/min, is put into potassium magnesium phosphate cement base
Adhesive powder, 0.5～2min of low rate mixing continue low rate mixing to uniform, add slowly emergy and gather in 20～40S
Tacryl, adds suitable quantity of water to adjust the denseness of compound slurry in mixer to 130 ± 5mm, compound slurry while stirring
Uniformly, then quickly 0.5～2min is stirred, the rotating speed of quick stirring is 285 ± 10 turns/min, obtains 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：First stage is phosphorus
The preparation of sour potassium magnesium cement, preparation of the second stage for potassium magnesium phosphate cement-based adhesive powder, 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 includes following steps：
Clear up and spray water wetting steel matrix surface, wait to dry steel matrix surface anhydrous, 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.
As 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, service behaviour are good, and surface drying time is short, can increase substantially efficiency of construction；The potassium phosphate
Magnesium cement base fire-resistant coating for steel structure will not produce poisonous, pernicious gas pollution environment in production, construction and combustion process；Should
Potassium magnesium phosphate cement base fire-resistant coating for steel structure is strong with steel matrix adhesive force, and fire resistance is high, has fire prevention and anti-corrosion double effects.
With reference to embodiments the feature and performance of the present invention are described in further detail.
Embodiment 1
Embodiment 1 provides a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, and which is by potassium magnesium phosphate cement-based adhesive
Powder, filler (emergy and expanded perlite in powder), anti-crack fiber (disorderly to chopped PVC fibers) and water are mixed, specifically
It is obtained according to procedure below：
87.5kg potassium magnesium phosphate cement is weighed (by 41kg dead roasting magnesia, 40kg potassium dihydrogen phosphates, the compound slow settings of 6.5kg
Agent is constituted), 12kg steel-making slag powders, 0.45kg titanium dioxide, 0.05kg air entraining agents, be well mixed that to obtain potassium magnesium phosphate cement base gluing
Agent powder.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powders of 52kg, 10.5kg emergies, 37kg expanded perlite in powders
With 0.5kg disorderly to chopped PVC fibers, expanded perlite in powder is soaked in water to water suction saturation, is taken out to dry in the air and is done to saturation plane
State is standby.
To be put in the cement plaster blender of adjustable speed through the expanded perlite in powder for processing, low rate mixing is to expanding treasure
Part water in pearl rock bulk cargo oozes out, and is put into potassium magnesium phosphate cement-based adhesive powder, and low rate mixing 2min is placed into uniform
To chopped PVC fibers, side low rate mixing, side add suitable quantity of water to adjust the denseness of slurry, low rate mixing slurry to white fused alumina sand with disorderly
To 1min quickly being stirred again after uniform, obtain the potassium magnesium phosphate cement base fire-resistant coating for steel structure slurry for meeting construction requirement denseness
Body.
The using method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically includes following steps：
Clear up and spray water wetting steel matrix surface, wait to dry anhydrous to surface, with prepared potassium magnesium phosphate cement base steel
Structure fire coating paste point smears steel matrix surface for 4 times, and gained coating layer thickness is 20mm.In 20 ± 5 DEG C, 50 ± 10%RH rings
Natural curing coating 15d under border.
According to GB14907-2002《Fire-resistant coating for steel structure》, to the present embodiment in potassium magnesium phosphate cement base steel construction prevent
The key property of fiery coating is tested, and the results are shown in Table 1.
The performance of the 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, and which is by potassium magnesium phosphate cement-based adhesive
Powder, filler (emergy and expanded perlite in powder), anti-crack fiber (disorderly to chopped PVC fibers) and water are mixed, specifically
It is obtained according to procedure below：
(42kg dead roasting magnesia, 40kg potassium dihydrogen phosphates, 5.5kg are combined slow setting to weigh 87.5kg potassium magnesium phosphate cement
Agent), 12kg steel-making slag powders, 0.45kg titanium dioxide, 0.05kg air entraining agents, be well mixed and obtain potassium magnesium phosphate cement-based adhesive powder
Material.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powders of 49kg, 5.5kg emergies, 45kg expanded perlite in powders and
0.5kg takes expanded perlite in powder and is soaked in water to water suction saturation, take out the shape dry to saturation plane that dries in the air disorderly to chopped PVC fibers
State is standby.
Expanded perlite in powder through processing is put in the cement plaster blender of adjustable speed low rate mixing to expanding treasure
Part water in pearl rock bulk cargo oozes out, and is put into potassium magnesium phosphate cement-based adhesive powder, and low rate mixing 2min is placed into uniform
To chopped PVC fibers, side low rate mixing, side add suitable quantity of water to adjust the denseness of slurry, low rate mixing slurry to white fused alumina sand with disorderly
To quickly 1min being stirred again after uniform, obtain the potassium magnesium phosphate cement base fire-resistant coating for steel structure for meeting construction requirement denseness.
The using method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically includes following steps：
Clear up and spray water wetting steel matrix surface, wait to dry anhydrous to surface, with prepared potassium magnesium phosphate cement base steel
Structure fire coating paste point is applied to steel matrix surface for 3 times, and gained coating layer thickness is 25mm.In 20 ± 5 DEG C, 50 ± 10%RH
Natural curing coating 15d under environment.
According to GB14907-2002《Fire-resistant coating for steel structure》, to the present embodiment in potassium magnesium phosphate cement base steel construction prevent
The key property of fiery coating is tested, and the results are shown in Table 2.
The performance of the 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, and which is specifically obtained according to procedure below：
90.5kg potassium magnesium phosphate cement is weighed (by 44kg dead roasting magnesia, 40kg potassium dihydrogen phosphates, the compound slow settings of 6.5kg
Agent is constituted), 8kg steel-making slag powders, 0.45kg titanium dioxide, 0.05kg air entraining agents, be well mixed that to obtain potassium magnesium phosphate cement base gluing
Agent powder.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powders of 51kg, 7.5kg emergies, 41kg expanded perlite in powders and
0.5kgPVC fibers, take expanded perlite in powder and are soaked in water to water suction saturation, and taking-up is dried in the air standby to saturated dry surface.
Expanded perlite in powder through processing is put in the cement plaster blender of adjustable speed low rate mixing to expanding treasure
Part water in pearl rock bulk cargo oozes out, and is put into potassium magnesium phosphate cement-based adhesive powder, and low rate mixing 2min is placed into uniform
To chopped PVC fibers, side low rate mixing, side add suitable quantity of water to adjust the denseness of slurry, low rate mixing slurry to white fused alumina sand with disorderly
To quickly 1min being stirred again after uniform, obtain the potassium magnesium phosphate cement base fire-resistant coating for steel structure for meeting construction requirement denseness.
The using method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically includes following steps：
Clear up and spray water wetting steel matrix surface, wait to dry anhydrous to surface, with prepared potassium magnesium phosphate cement base steel
Structure fire coating paste point is applied to steel matrix surface for 3 times, and gained coating layer thickness is 15mm.In 20 ± 5 DEG C, 50 ± 10%RH
Natural curing coating 15d under environment.
According to GB14907-2002《Fire-resistant coating for steel structure》, to the present embodiment in potassium magnesium phosphate cement base steel construction prevent
The key property of fiery coating is tested, and the results are shown in Table 3.
The performance of the 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, and which is specifically obtained according to procedure below：
89kg potassium magnesium phosphate cement is weighed (by 43kg dead roasting magnesia, 39.5kg potassium dihydrogen phosphates, the compound slow settings of 6.5kg
Agent is constituted), 10.4kg steel-making slag powders, 0.5kg titanium dioxide, 0.1kg air entraining agents, be well mixed that to obtain potassium magnesium phosphate cement base gluing
Agent powder.
Weigh the above-mentioned potassium magnesium phosphate cement-based adhesive powders of 50kg, 10.5kg emergies, 39kg expanded perlite in powders
With 0.5kg PVC fibers, take expanded perlite in powder and be soaked in water to water suction saturation, taking-up is dried in the air standby to saturated dry surface
With.
Expanded perlite in powder through processing is put in the cement plaster blender of adjustable speed low rate mixing to expanding treasure
Part water in pearl rock bulk cargo oozes out, and is put into potassium magnesium phosphate cement-based adhesive powder, and low rate mixing 2min is placed into uniform
To chopped PVC fibers, side low rate mixing, side add suitable quantity of water to adjust the denseness of slurry, low rate mixing slurry to white fused alumina sand with disorderly
To quickly 1min being stirred again after uniform, obtain the potassium magnesium phosphate cement base fire-resistant coating for steel structure for meeting construction requirement denseness.
The using method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, specifically includes following steps：
Clear up and spray water wetting steel matrix surface, wait to dry anhydrous to surface, with prepared potassium magnesium phosphate cement base steel
Structure fire coating paste point is applied to steel matrix surface for 4 times, and gained coating layer thickness is 15mm.In 20 ± 5 DEG C, 50 ± 10%RH
Natural curing coating 15d under environment.
According to GB14907-2002《Fire-resistant coating for steel structure》, to the present embodiment in potassium magnesium phosphate cement base steel construction prevent
The key property of fiery coating is tested, and the results are shown in Table 4.
The performance of the potassium magnesium phosphate cement base fire-resistant coating for steel structure in 4 embodiment 4 of table
By table 1- tables 4 as can be seen that the potassium magnesium phosphate cement base fire-resistant coating for steel structure using the embodiment of the present invention is coated
During steel construction, its drying time is short, initial stage crack resistance is good, excellent fire retarding performance.
In sum, 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, with setting time is controllable, hardening fast, normal temperature cure, is easy to preserve and lower-cost feature, and which is to steel construction base
The adhesive force of body is strong, high mechanical strength, fire protecting performance excellent and stable (fire endurance temperature is high, high-temperature stability is good), durable
Property is good.The process is simple of the preparation method of the potassium magnesium phosphate cement base fire-resistant coating for steel structure, abundant raw material source, price compared with
Low, energy-conserving and environment-protective.During using the potassium magnesium phosphate cement base fire-resistant coating for steel structure, coating layer thickness is little, quick construction is convenient and solid
Change fast.
Embodiments described above is a part of embodiment of the invention, rather than whole embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected enforcement of the present invention
Example.Embodiment in based on the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Claims (10)
1. a kind of potassium magnesium phosphate cement base fire-resistant coating for steel structure, it is characterised in which 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：
2. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, it is characterised in that the steel-making slag powder is
Obtained by vessel slag is levigate, its fineness is 48～75 μm.
3. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, it is characterised 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, it is characterised in that the expanded pearlite
The fineness of rock bulk cargo is 1.2～3mm, and density is 200～300kg/m3, thermal conductivity factor is 0.066～0.074W/ (m K).
5. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, it is characterised in that the polypropylene is fine
It is unrest to chopped polypropylene fibre to tie up, 3～6mm of the polypropylene fibre length, a diameter of 20～30 μm.
6. potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 1, it is characterised in that by weight percent
Meter, the potassium magnesium phosphate cement include：
Dead roasting magnesia powder 46%～49%；
Potassium dihydrogen phosphate 44%～46%；And
Compound retarder 7%～8%.
7. a kind of preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure as claimed in claim 1, it is characterised in that
Which comprises the following steps：
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 well mixed and obtain potassium magnesium phosphate cement-based adhesive powder；
Percentage, weighs potassium magnesium phosphate cement-based adhesive powder described in 47%～53%, 5%～11% corundum
Sand, 37%～45% expanded perlite in powder, and 0.45%～0.55% polypropylene fibre；
The expanded perlite in powder is put in mixer and is persistently stirred, stirred to there is part water to ooze out, be put into the phosphoric acid
Potassium magnesium cement-based adhesive powder, is stirred until homogeneous, and adds the emergy and the polypropylene fibre, adds water while stirring
The denseness of compound slurry in the mixer is adjusted, until the compound slurry is uniform.
8. the preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 7, it is characterised in that will
Before the expanded perlite in powder is put into the mixer, first the expanded perlite is soaked in water to water suction saturation, is taken
Go out to dry in the air to saturated dry surface.
9. the preparation method of potassium magnesium phosphate cement base fire-resistant coating for steel structure according to claim 7, it is characterised in that institute
State compound slurry uniform after, continue stirring 0.5～2min.
10. a kind of using method of potassium magnesium phosphate cement base fire-resistant coating for steel structure as claimed in claim 1, its feature exist
In which specifically includes following steps：
Clear up and spray water wetting steel matrix surface, wait to dry the steel matrix surface anhydrous, points 3～4 times by the potassium phosphate
Magnesium cement base fire-resistant coating for steel structure is applied to the steel matrix surface, and gained coating layer thickness is 15～25mm.
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| CN107117931A (en) * | 2017-06-15 | 2017-09-01 | 深圳大学 | Modified phosphate cement-based fireproofing coating and its manufacture method |
| CN107462661A (en) * | 2017-06-21 | 2017-12-12 | 长沙标朗住工科技有限公司 | A kind of method of testing of coating fire retardant performance |
| CN111521552A (en) * | 2020-05-15 | 2020-08-11 | 南京工业大学 | Test method for testing aging of intumescent steel structure fireproof coating in industrial environment |
| CN114873987A (en) * | 2022-06-29 | 2022-08-09 | 天津市辰青金属制品有限公司 | Steel cable anticorrosive coating material and preparation method and application thereof |
| CN115044232A (en) * | 2022-06-23 | 2022-09-13 | 中铁城建集团第一工程有限公司 | Steel structure fireproof coating and preparation method and use method thereof |
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