CN115506238A - Expansion type bridge cable with sealing fireproof composite structure - Google Patents
Expansion type bridge cable with sealing fireproof composite structure Download PDFInfo
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- CN115506238A CN115506238A CN202211191635.5A CN202211191635A CN115506238A CN 115506238 A CN115506238 A CN 115506238A CN 202211191635 A CN202211191635 A CN 202211191635A CN 115506238 A CN115506238 A CN 115506238A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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Abstract
The invention discloses a bridge cable with an expansion type sealing fireproof composite structure, which belongs to the technical field of fireproof protection of bridge cables, and takes a flexible fireproof material and an expansion flame-retardant sealing tape as main fireproof layers, wherein a wire winding layer, an anticorrosive layer, a fireproof layer and a surface protective layer are sequentially arranged from inside to outside on the surface of a cable steel wire bundle; the expansion flame-retardant sealant is prepared by adopting pre-dispersion and sealing protection treatment on components such as fire prevention, char formation and expansion, the expansion flame-retardant sealant is prepared by utilizing the prior art through component optimization, the whole thickness of the sealed fireproof composite structure is greatly reduced while the fire prevention of a bridge cable is ensured, the construction is convenient, the quality of the cable expansion type sealed fireproof composite structure is obviously improved, the applicability of the expansion flame-retardant sealant is strong, the advantages are remarkable, and the market prospect is wider.
Description
The technical field is as follows:
the invention relates to a bridge cable surface fire prevention technology, in particular to a bridge cable with an expansion type sealing fire prevention composite structure, and belongs to the technical field of bridge cable engineering fire prevention.
Technical Field
At present, the fireproof protection of bridge cables in China has no relevant standard, and the mature technical system is few. But any scheme of the fireproof heat-insulating layer must meet the following main requirements that (1) the fireproof requirement of a hydrocarbon fire temperature field can be met, and the surface temperature of a cable body cannot exceed 400 ℃; (2) the composite material can have good shock resistance and durability under the effects of bearing wind load, vibration load and the like for a long time; (3) because the cable is a flexible building material, the fireproof system must have certain flexibility and can be firmly attached to the surface of the cable for a long time; (4) is matched with a cable corrosion prevention system and a sealing protection system. The weather resistance of the cable is related to the height and width of the cable, so the fire protection structure cannot be designed too thick to affect the weather resistance of the cable.
CN202110492575X discloses a bridge main cable fireproof coating structure, a bridge main cable and a manufacturing method of the bridge main cable, wherein the bridge main cable fireproof coating structure is applied to the surface of a cable, a primer layer, a sealing layer, an aerogel fireproof composite layer and a silicon inorganic material composite coating are sequentially arranged from inside to outside, the problems that the cable is poor in fireproof performance and cannot be frozen in the prior art are solved, the main problems are that the aerogel fireproof composite layer is bonded with an aerogel felt by adopting high-temperature-resistant silicone sealant in the construction process, the outer surface of the aerogel fireproof composite layer is wrapped by an aluminum foil tape, and the aerogel felt is designed to be thick and cannot be smaller than 10mm in thickness in order to resist the high temperature of 1100 ℃ within 30 min. CN215482318U discloses a fiber sealing protection system for a bridge cable, which adopts a fire-resistant structure formed by a basalt felt fire-resistant belt, basalt cloth and a sealing belt superposed by high-temperature-resistant silicone sealant, wherein in order to meet the fire-resistant requirement of the bridge cable, the fire-resistant belt is designed to be 4mm, the sealing belt is designed to be 6mm, and the fire-resistant belt and the sealing belt are designed to be thicker in the same way.
In the prior art, a fireproof layer adopts a flexible fireproof heat-insulating material and a flame-retardant sealing tape for cable fireproof, the flame-retardant sealing tape is formed by alternately superposing a non-combustible high-strength fiber cloth and a high-temperature-resistant silicone sealant, and the thickness of the flame-retardant sealing tape is 4-6mm. The flexible fireproof heat-insulating material is thickened to meet the fireproof design requirement, so that the outer diameter of the cable is improved, the wind resistance of the cable is increased, the construction difficulty is increased, and the overall wrapping quality and the durability of the cable are greatly hidden.
Disclosure of Invention
Aiming at the problem that the fireproof material is thick in the existing bridge cable fireproof technology, the invention provides a bridge cable with an expansion type sealing fireproof composite structure, which reduces the thickness of the fireproof material, improves the fireproof performance of the fireproof structure and prolongs the fireproof time of the cable.
The technical scheme adopted by the invention is as follows: a bridge cable with an expansion type sealing fireproof composite structure adopts a flexible fireproof heat-insulating material and an expansion flame-retardant fireproof sealing tape to perform cable fireproof, and comprises a cable steel wire bundle; the cable steel wire bundle surface wraps the winding layer, the anticorrosive coating, the fireproof coating and the surface protective layer from inside to outside in sequence, wherein:
the anticorrosive layer is sequentially provided with a phosphating primer layer, an epoxy anticorrosive primer layer and a vulcanization type sealing adhesive layer from inside to outside; the thickness of the vulcanization type sealant layer is 1 mm-3 mm;
the fireproof layer is sequentially provided with a flexible fireproof heat-insulating material and an expansion flame-retardant fireproof sealing strip from inside to outside; the flexible fireproof heat insulation material is ceramic cotton felt, basalt rock wool felt, basalt fiber needled felt or aerogel felt, and the thickness is 5 mm-30 mm;
the expansion flame-retardant fireproof sealing tape is formed by mutually overlapping non-combustible high-strength fiber cloth and expansion flame-retardant sealant, and the thickness of the expansion flame-retardant fireproof sealing tape is 3-10 mm;
the surface protection layer is a weather-resistant finish coat with the thickness of 60-120 mu m.
The preferable scheme of the bridge cable of the intumescent sealing fireproof composite structure is as follows: the intumescent flame-retardant fireproof sealing tape is formed by mutually overlapping a non-combustible high-strength fiber cloth and an intumescent flame-retardant sealant, wherein the intumescent flame-retardant sealant on the inner layer is a silicone intumescent flame-retardant sealant, and the intumescent flame-retardant sealant on the outermost layer is an MS intumescent flame-retardant sealant.
The preferable scheme of the bridge cable with the expansion type sealing fireproof composite structure is as follows: the silicone expansion flame-retardant sealant comprises the following substances in parts by weight:
100 parts of hydroxyl-terminated polydimethylsiloxane, 1-50 parts of nano calcium carbonate, 14-16 parts of ammonium polyphosphate APP-II, 6-7 parts of melamine, 5-6 parts of pentaerythritol, 20-40 parts of expanded graphite, 0-20 parts of titanium dioxide, 5-15 parts of a cross-linking agent, 2-3 parts of a carbonate coupling agent, 0.5-4 parts of a catalyst, 0-3 parts of a flatting agent, 0-3 parts of a defoaming agent and 0-3 parts of a light stabilizer; the production method of the silicone intumescent flame retardant sealant comprises the following steps:
firstly, sequentially adding ammonium polyphosphate APP-II, melamine, pentaerythritol and expanded graphite in a formula into a high-speed mixing tank, mixing at a high speed for 6min, grinding the mixture by using an ACM (Acrylonitrile-butadiene-styrene) classified mill, and controlling the D50 particle size to be below 40 mu m;
step two, adding a titanate coupling agent into the mixture obtained by the step one, namely grinding the mixture by the ACM in a grading way, and mixing the mixture at a high speed for 6min to obtain a treated mixture;
and step three, adding the mixture obtained in the step two, nano calcium carbonate and titanium dioxide into hydroxyl-terminated polydimethylsiloxane together to prepare the silicone expansion flame-retardant sealant.
The preferable scheme of the bridge cable of the intumescent sealing fireproof composite structure is as follows: the MS intumescent flame retardant sealant comprises the following substances in parts by weight:
20 to 50 parts of silane modified polymer resin, 10 to 20 parts of plasticizer, 10 to 15 parts of fumed silica, 5 to 10 parts of titanium dioxide, 16 to 18 parts of ammonium polyphosphate APP-II, 7 to 8 parts of melamine, 6 to 7 parts of pentaerythritol, 20 to 40 parts of expanded graphite, 2 to 3 parts of carbonate coupling agent, 0.5 to 2 parts of polyamide wax SL, 0.2 to 1 part of antioxidant, 0.5 to 2 parts of moisture scavenger, 0.5 to 1.5 parts of adhesion promoter and 0.5 to 1.5 parts of catalyst; the preparation method of the MS intumescent flame retardant sealant comprises the following steps:
firstly, sequentially adding ammonium polyphosphate APP-II, melamine, pentaerythritol and expanded graphite in a formula into a high-speed mixing tank, mixing at a high speed for 6min, grinding the mixture by using an ACM (Acrylonitrile-butadiene-styrene) classified mill, and controlling the D50 particle size to be below 40 mu m;
step two, adding a titanate coupling agent into the mixture obtained by the step one ACM classified grinding, and mixing for 6min at a high speed to obtain a treated mixture;
and step three, adding the mixture obtained in the step two, fumed silica and titanium dioxide into silane modified polymer resin together to prepare the MS intumescent flame retardant sealant.
The preferable scheme of the bridge cable with the expansion type sealing fireproof composite structure is as follows: the vulcanization type sealing adhesive layer is a vulcanization type silane modified sealing adhesive layer or a weather-resistant silicone sealing adhesive layer.
The preferable scheme of the bridge cable of the intumescent sealing fireproof composite structure is as follows: the incombustible high-strength fiber cloth is glass fiber cloth, basalt fiber cloth or high silica fiber cloth.
The beneficial effects of the invention are as follows: the flexible fire-resistant heat-insulating material and the intumescent flame-retardant fireproof sealing tape are adopted for cable fire prevention, the intumescent flame-retardant fireproof sealing tape expands when encountering fire, the thickness of the fireproof sealing tape is increased in a short time, the fireproof performance of a fireproof structure is greatly improved, the fireproof time of the cable is prolonged, the requirement on the same fireproof time is met, and the thickness of the flexible fire-resistant heat-insulating material can be obviously reduced.
The expansion flame-retardant sealant is prepared by adopting pre-dispersion and sealing protection treatment on components such as fire prevention, char formation and expansion, the expansion flame-retardant sealant is prepared by utilizing the prior art through component optimization, the whole thickness of the sealed fireproof composite structure is greatly reduced while the fire prevention of a bridge cable is ensured, the construction is convenient, the quality of the cable expansion type sealed fireproof composite structure is obviously improved, the applicability of the expansion flame-retardant sealant is strong, the advantages are remarkable, and the market prospect is wider.
Drawings
FIG. 1 shows the appearance of the intumescent flame retardant sealant layer used in the present invention after burning;
FIG. 2 shows the expansion of the intumescent flame retardant sealant layer adopted in the present invention after combustion;
FIG. 3 is a schematic view of the structure of the present invention;
FIG. 4 is a schematic view of a fire barrier construction;
FIG. 5 is a combustion test temperature rise curve of example 4 of the present invention.
In the figure: 1. the cable steel wire bundle comprises a cable steel wire bundle, 2, a winding layer, 3, an anticorrosive layer, 4, a fireproof layer, 5, a surface protective layer, 41, a flexible fireproof heat-insulating material, 42, an expansion flame-retardant fireproof sealing tape, 421, a first layer of incombustible high-strength fiber cloth, 422, a first layer of silicone expansion flame-retardant sealant, 423, a second layer of incombustible high-strength fiber cloth, 424, a second layer of silicone expansion flame-retardant sealant, 425, a third layer of incombustible high-strength fiber cloth, 426 and MS expansion flame-retardant sealant.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in fig. 1 and 2;
the silicone intumescent flame-retardant sealant comprises the following formula components: 100 parts of hydroxyl-terminated polydimethylsiloxane, 10 parts of nano calcium carbonate, ammonium polyphosphate APP-II, 15 parts of melamine, 7 parts of pentaerythritol, 10 parts of titanium dioxide, 15 parts of a crosslinking agent, 3 parts of a carbonate coupling agent, 20 parts of expanded graphite, 2 parts of a catalyst, 2 parts of a leveling agent, 2 parts of a defoaming agent and 2 parts of a light stabilizer.
Firstly, sequentially adding ammonium polyphosphate APP-II, melamine, pentaerythritol and expanded graphite in a formula into a high-speed mixing tank, mixing at a high speed for 6min, grinding the mixture by using an ACM (Acrylonitrile-butadiene-styrene) classified mill, and controlling the D50 particle size to be below 40 mu m;
adding a titanate coupling agent into the mixture obtained by grinding the ACM in a grading mill, and mixing at a high speed for 6min to obtain a treated mixture;
the obtained mixture, nano calcium carbonate and titanium dioxide are added into hydroxyl-terminated polydimethylsiloxane together by adopting the existing production equipment and process of the silicone sealant, and then the silicone expansion flame-retardant sealant is prepared together with other formula components by adopting the existing production process of the silicone sealant.
After the combustion experiment, the sealing adhesive layer of the embodiment can expand to 28mm from 5mm, the expansion multiple reaches 5.6 times, the expansion is obvious when encountering fire, the expansion layer is continuous, uniform and compact, the strength of the carbonized adhesive layer is stronger, the phenomenon of blowing off is avoided, and the sealing adhesive layer has a good fire-resistant effect.
Example 2
As shown in fig. 1 and 2;
the MS intumescent flame retardant sealant comprises the following formula components: 50 parts of silane modified polymer resin, 20 parts of plasticizer, 10 parts of fumed silica, 8 parts of titanium dioxide, 18 parts of ammonium polyphosphate APP-II, 8 parts of melamine, 7 parts of pentaerythritol, 3 parts of carbonate coupling agent, 40 parts of expanded graphite, 1 part of polyamide wax SL, 1 part of antioxidant, 1 part of moisture scavenger, 1 part of adhesion promoter and 2 parts of catalyst.
Firstly, sequentially adding ammonium polyphosphate APP-II, melamine, pentaerythritol and expanded graphite in a formula into a high-speed mixing tank, mixing at a high speed for 6min, grinding the mixture by using an ACM (Acrylonitrile-butadiene-styrene) classified mill, and controlling the D50 particle size to be below 40 mu m;
adding a titanate coupling agent into the mixture obtained by grinding ACM in a grading manner, and mixing for 6min at a high speed to obtain a treated mixture;
and finally, adding the obtained mixture, fumed silica and titanium dioxide into the silane modified polymer resin by adopting the conventional MS sealant production equipment, and then preparing the MS intumescent flame retardant sealant together with other formula components by using the conventional MS sealant production process.
After a combustion experiment, the expansion multiple of the sealing adhesive layer exceeds 5 times, the sealing adhesive layer is obviously expanded when meeting fire, the expansion layer is continuous, uniform and compact, the strength of the carbonized adhesive layer is strong, the phenomenon of blowing off is avoided, and the sealing adhesive layer has a good fire-resistant effect.
Example 3
As shown in fig. 3 and 4;
a bridge cable with an expansion type sealing fireproof composite structure sequentially comprises a cable steel wire bundle 1, a wire winding layer 2, an anticorrosive layer 3, a fireproof layer 4 and a surface protective layer 5 from inside to outside from the surface of the cable steel wire bundle, wherein a phosphating primer layer, a solvent-free epoxy anticorrosive primer layer of 160 mu m and a vulcanization type silane modified sealing adhesive layer are sequentially coated on the surface of the wire winding layer 2.
The outer surface of the anti-corrosion layer 3 is wrapped with an aerogel felt flexible fire-resistant heat-insulating material 41 with the thickness of 5mm, and then an expansion flame-retardant fireproof sealing tape 42 formed by overlapping expansion flame-retardant sealing tape and basalt fiber cloth is wrapped with the outer surface of the anti-corrosion layer 3, and the thickness of the expansion flame-retardant fireproof sealing tape is 4mm. The concrete implementation is that a 1 st layer of basalt incombustible high-strength fiber cloth 421 is firstly wound on the surface of an aerogel felt 41, the overlapped part is overlapped by 100-200mm, then the silicone intumescent flame retardant sealant in the embodiment 1 is coated to form a 1 st layer of silicone intumescent flame retardant sealant 422, a 2 nd layer of basalt incombustible high-strength fiber cloth 423 is wound before the sealant is cured, the silicone intumescent flame retardant sealant in the embodiment 1 is coated to form a 2 nd layer of silicone intumescent flame retardant sealant 424 after the sealant is completely dried, a 3 rd layer of basalt incombustible high-strength fiber cloth 425 is wound before the sealant is cured, and the intumescent flame retardant sealant in the embodiment 2 is coated to form an MS intumescent flame retardant sealant 426 after the sealant is completely dried. And after the MS sealant is completely cured, brushing the surface protective layer 4, wherein the surface protective layer 4 is brushed by adopting flexible fluorocarbon finish paint, and the thickness is 80 mu m.
Example 4
As shown in fig. 1, 2, 3, 4, 5;
a bridge cable with an expansion type sealing fireproof composite structure sequentially comprises a cable steel wire bundle 1, a wire winding layer 2, an anticorrosive layer 3, a fireproof layer 4 and a surface protective layer 5 from inside to outside from the surface of the cable steel wire bundle, wherein a phosphating primer layer, a solvent-free epoxy anticorrosive primer layer of 160 mu m and a vulcanization type silane modified sealing adhesive layer are sequentially coated on the surface of the wire winding layer 2. The outer surface of the anti-corrosion layer 3 is wrapped with a basalt needled felt flexible fire-resistant heat-insulating material 41 with the thickness of 6mm, and then an expansion flame-retardant fireproof sealing tape 42 formed by overlapping expansion flame-retardant sealing tape and glass fiber cloth and with the thickness of 4mm. The concrete implementation is that firstly a 1 st layer of incombustible high-strength glass fiber cloth 421 is wrapped on the surface of the basalt needled felt 41, the lap joint is overlapped by 100-200mm, then a 1 st layer of silicone expansion flame-retardant sealant 422 is coated, a 2 nd layer of incombustible high-strength glass fiber cloth 423 is wrapped before the sealant is cured, a 2 nd layer of silicone expansion flame-retardant sealant 424 is coated after the sealant is completely dried, a 3 rd layer of incombustible high-strength glass fiber cloth 425 is wrapped before the sealant is cured, and an MS expansion flame-retardant sealant layer 426 is coated after the sealant is completely dried. And after the MS sealant is completely cured, brushing the surface protective layer 4, wherein the surface protective layer 4 is brushed by adopting flexible fluorocarbon finish paint, and the thickness is 80 mu m.
Example 5
As shown in fig. 3 and 4;
a bridge cable with an expansion type sealing fireproof composite structure sequentially comprises a cable steel wire bundle 1, a wire winding layer 2, an anticorrosive layer 3, a fireproof layer 4 and a surface protective layer 5 from inside to outside from the surface of the cable steel wire bundle, wherein a phosphating primer layer, a solvent-free epoxy anticorrosive primer layer 160 mu m and a silicone sealant layer are sequentially coated on the surface of the wire winding layer 2.
The outer surface of the anti-corrosion layer 3 is wrapped with a ceramic cotton felt flexible fire-resistant heat-insulating material 41 with the thickness of 30mm, and then an expansion flame-retardant fireproof sealing tape 42 formed by overlapping expansion flame-retardant sealing tape and high silica fiber cloth is wrapped with the outer surface of the anti-corrosion layer 3, and the thickness of the sealing tape is 4mm. The specific implementation is that firstly a 1 st layer of incombustible high silica fiber cloth 421 is wrapped on the surface of the ceramic cotton 41, the lap joint is overlapped by 100-200mm, then a 1 st layer of silicone intumescent flame retardant sealant 422 is coated, a 2 nd layer of incombustible high silica fiber cloth 423 is wrapped before the sealant is cured, a 2 nd layer of silicone intumescent flame retardant sealant 424 is coated after the sealant is completely dried, a 3 rd layer of incombustible high silica fiber cloth 425 is wrapped before the sealant is cured, and an MS intumescent flame retardant sealant layer 426 is coated after the sealant is completely dried. And after the MS sealant is completely cured, coating a surface protective layer 4 by brushing, wherein the surface protective layer 4 adopts flexible acrylic polyurethane finish paint with the thickness of 100 mu m.
The liquefied gas furnace is adopted to simulate a hydrocarbon fire field, and the fire resistance test end point is that the temperature of a simulated cable steel wire bundle reaches 400 ℃, and the fire resistance of the bridge cable with the expansion type sealing fireproof composite structure and the comparison condition with the prior art are shown in table 1.
According to table 1 test data, compare with current similar technique, this embodiment utilizes novel inflation fire-retardant sealed glue, reduces current coating system thickness to can gain good fire prevention effect.
TABLE 1 fire resistance of the examples and comparative data with the prior art
Claims (6)
1. The utility model provides an expansion type sealing fire prevention composite construction's bridge cable, adopts flexible fire-resistant thermal insulation material and inflation fire-retardant fire prevention sealing strip to carry out cable fire prevention which characterized in that: comprising a cable wire bundle (1); cable steel wire bundle (1) surface is by interior wrapping up in proper order twines silk layer (2), anticorrosive coating (3), flame retardant coating (4) and surface protection layer (5) outside to, wherein:
the anticorrosive layer (3) is sequentially provided with a phosphating primer layer, an epoxy anticorrosive primer layer and a vulcanization type sealing adhesive layer from inside to outside; the thickness of the vulcanization type sealant layer is 1 mm-3 mm;
the fireproof layer (4) is sequentially provided with a flexible fireproof heat-insulating material (41) and an expansion flame-retardant fireproof sealing tape (42) from inside to outside; the flexible fireproof heat insulation material (41) is a ceramic cotton felt, a basalt rock wool felt, a basalt fiber needled felt or an aerogel felt, and the thickness is 5 mm-30 mm;
the expansion flame-retardant fireproof sealing tape (42) is formed by mutually overlapping non-combustible high-strength fiber cloth and expansion flame-retardant sealant, and the thickness is 3-10 mm;
the surface protective layer (5) is a weather-resistant finish coat with the thickness of 60-120 mu m.
2. The bridge cable of intumescent sealing and fire-blocking composite structure as claimed in claim 1, wherein: the expansion flame-retardant fireproof sealing tape (42) is formed by mutually overlapping non-combustible high-strength fiber cloth and expansion flame-retardant sealant, wherein the expansion flame-retardant sealant at the inner layer is silicone expansion flame-retardant sealant, and the expansion flame-retardant sealant at the outermost layer is MS expansion flame-retardant sealant.
3. The bridge cable of intumescent sealing and fire-blocking composite structure as claimed in claim 2, wherein: the silicone expansion flame-retardant sealant comprises the following substances in parts by weight:
100 parts of hydroxyl-terminated polydimethylsiloxane, 1-50 parts of nano calcium carbonate, 14-16 parts of ammonium polyphosphate APP-II, 6-7 parts of melamine, 5-6 parts of pentaerythritol, 20-40 parts of expanded graphite, 0-20 parts of titanium dioxide, 5-15 parts of a cross-linking agent, 2-3 parts of a carbonate coupling agent, 0.5-4 parts of a catalyst, 0-3 parts of a flatting agent, 0-3 parts of a defoaming agent and 0-3 parts of a light stabilizer; the production method of the silicone intumescent flame retardant sealant comprises the following steps:
firstly, sequentially adding ammonium polyphosphate APP-II, melamine, pentaerythritol and expanded graphite in a formula into a high-speed mixing tank, mixing at a high speed for 6min, grinding the mixture by using an ACM (Acrylonitrile-butadiene-styrene) classified mill, and controlling the D50 particle size to be below 40 mu m;
step two, adding a titanate coupling agent into the mixture obtained by the step one ACM classified grinding, and mixing for 6min at a high speed to obtain a treated mixture;
and step three, adding the mixture obtained in the step two, nano calcium carbonate and titanium dioxide into hydroxyl-terminated polydimethylsiloxane together to prepare the silicone expansion flame-retardant sealant.
4. The bridge cable of intumescent sealing fire-resistant composite structure according to claim 2, wherein: the MS intumescent flame retardant sealant comprises the following substances in parts by weight:
20 to 50 parts of silane modified polymer resin, 10 to 20 parts of plasticizer, 10 to 15 parts of fumed silica, 5 to 10 parts of titanium dioxide, 16 to 18 parts of ammonium polyphosphate APP-II, 7 to 8 parts of melamine, 6 to 7 parts of pentaerythritol, 20 to 40 parts of expanded graphite, 2 to 3 parts of carbonate coupling agent, 0.5 to 2 parts of polyamide wax SL, 0.2 to 1 part of antioxidant, 0.5 to 2 parts of moisture scavenger, 0.5 to 1.5 parts of adhesion promoter and 0.5 to 1.5 parts of catalyst; the preparation method of the MS intumescent flame retardant sealant comprises the following steps:
firstly, sequentially adding ammonium polyphosphate APP-II, melamine, pentaerythritol and expanded graphite in a formula into a high-speed mixing tank, mixing at a high speed for 6min, grinding the mixture by using an ACM (Acrylonitrile-butadiene-styrene) classified mill, and controlling the D50 particle size to be below 40 mu m;
step two, adding a titanate coupling agent into the mixture obtained by the step one ACM classified grinding, and mixing for 6min at a high speed to obtain a treated mixture;
and step three, adding the mixture obtained in the step two, fumed silica and titanium dioxide into silane modified polymer resin together to prepare the MS intumescent flame retardant sealant.
5. The bridge cable of intumescent sealing and fire-blocking composite structure as claimed in claim 1, wherein: the vulcanization type sealing adhesive layer is a vulcanization type silane modified sealing adhesive layer or a weather-resistant silicone sealing adhesive layer.
6. The bridge cable of intumescent sealing and fire-blocking composite structure as claimed in claim 1, wherein: the incombustible high-strength fiber cloth is glass fiber cloth, basalt fiber cloth or high silica fiber cloth.
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| CN202211191635.5A CN115506238A (en) | 2022-09-28 | 2022-09-28 | Expansion type bridge cable with sealing fireproof composite structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116786389A (en) * | 2023-08-23 | 2023-09-22 | 淄博大洋阻燃制品有限公司 | Flame-retardant heat-insulating composite material and preparation method thereof |
| CN117626802A (en) * | 2023-10-30 | 2024-03-01 | 中交公路长大桥建设国家工程研究中心有限公司 | Expansion type bridge cable fireproof wrapping belt and manufacturing and installing methods |
-
2022
- 2022-09-28 CN CN202211191635.5A patent/CN115506238A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116786389A (en) * | 2023-08-23 | 2023-09-22 | 淄博大洋阻燃制品有限公司 | Flame-retardant heat-insulating composite material and preparation method thereof |
| CN116786389B (en) * | 2023-08-23 | 2023-10-27 | 淄博大洋阻燃制品有限公司 | Flame-retardant heat-insulating composite material and preparation method thereof |
| CN117626802A (en) * | 2023-10-30 | 2024-03-01 | 中交公路长大桥建设国家工程研究中心有限公司 | Expansion type bridge cable fireproof wrapping belt and manufacturing and installing methods |
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