CN205857782U - A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation - Google Patents
A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation Download PDFInfo
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- CN205857782U CN205857782U CN201620364740.8U CN201620364740U CN205857782U CN 205857782 U CN205857782 U CN 205857782U CN 201620364740 U CN201620364740 U CN 201620364740U CN 205857782 U CN205857782 U CN 205857782U
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- carbon cloth
- reinforced concrete
- flexure
- concrete members
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
This utility model provides the Reinforced Concrete Members with Flexure of a kind of ECC and carbon cloth composite consolidation, including: Reinforced Concrete Members with Flexure body, it is coated with the carbon fibre cloth layer in described flexural member side, is cast in the ECC layer outside described carbon cloth.Both carbon cloth can have been avoided to come unglued inefficacy, the crack of the Reinforced Concrete Members with Flexure such as external water Yan Liang, plate can be stoped again to invade, the internal reinforcing bar of protection is from water proofing property ECC of corrosion and carbon cloth composite consolidation material and using method thereof.Simple in construction, easy to operate, practical.
Description
Technical field
This utility model belongs to field of civil engineering, and the reinforcing bar particularly to a kind of ECC with carbon cloth composite consolidation mixes
Solidifying soil flexural member.
Background technology
In Reinforced Concrete Members with Flexure such as field of civil engineering, the beam of building (espespecially house, bridge etc.), plates, by
The factors such as or upper load increase aging in structure, show Lack of support, even by bent face concrete cracking.From economy
Angle and construction complexity consider, engineering typically will not directly be changed flexural member, but take certain reinforcing to arrange
Execute.At present frequently with Enlargement of Section, bonding steel plate method or affixing carbon fabric method in engineering.Wherein affixing carbon fabric
Method, owing to speed of application is fast, does not change constructional appearance, and does not the most increase the advantages such as dead load, have the highest engineering
Practical value.But the fastness problem of affixing carbon fabric is solved the most well, the amount of deflection of flexural member increases
Time big, phenomenon of coming unglued often occur, causes carbon cloth to lose efficacy.Meanwhile, carbon cloth also has the shortcoming be afraid of naked light, be afraid of shock.Separately
Outward, the crack that carbon cloth produces after can not effectively covering flexural member cracking, it is impossible to stop external water ground to invade, stop not
The corrosion of the internal reinforcing bar of flexural member.
ECC (Engineered Cementitious Composites, high ductility fiber reinforced cement-based composite material,
It is called for short ECC) as a kind of concrete material with certain strain-hardening property, self there is the adaptability to changes that comparison is high, can
For the Reinforced Concrete Members with Flexure reinforcing Lack of support.But ECC cost is the highest, directly ECC is used as by curved structure
The reinforcement material of part is uneconomic.
Utility model content
The purpose of this utility model is contemplated to solve the problems referred to above, it is provided that a kind of ECC and carbon cloth composite consolidation
Reinforced Concrete Members with Flexure.Both carbon cloth can have been avoided to come unglued inefficacy, the reinforcing bars such as external water Yan Liang, plate can have been stoped again
The crack of concrete flexural member invades, the internal reinforcing bar of protection from corrosion ECC and carbon cloth composite consolidation material and
Using method.
In order to solve the problems referred to above, this utility model adopts the following technical scheme that
A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation, including: Reinforced Concrete Members with Flexure
Body, is coated with at described flexural member by the carbon fibre cloth layer of curved side, is cast in the ECC layer outside described carbon cloth.
The Reinforced Concrete Members with Flexure such as ECC Yu Yuan Liang, plate has good adhesive property, and itself has stronger answering
Change ability (typically more than 3%), after flexural member produces certain deformation, still is able to fit tightly with it, solves engineering
The problem that upper conventional resin dipping glue carbon cloth easily comes unglued after flexural member produces certain deformation, it is ensured that carbon is fine
The tensile property of dimension cloth has obtained fully playing ECC and has served as carbon cloth protective layer, also solve carbon cloth be afraid of naked light,
Be afraid of the shortcoming clashed into, can effectively protect the carbon cloth of inside.
On the other hand, compared with common resin impregnated carbon fiber cloth glue, the excellent in durability of ECC.
Preferably, the two ends of described carbon fibre cloth layer are positioned on described flexural member by the method for stretch-draw anchor.
In order to solve the problem that affixing carbon fabric easily comes unglued in engineering, through pasting frequently with the method for subsection tension anchoring
Carbon cloth, uses the ECC material as affixing carbon fabric instead, it is only necessary to carbon cloth two ends are shifted to an earlier date stretch-draw anchor, then waters
Build or spray ECC, simplifying operational procedure.
Preferably, the 2/3 of a length of flexural member length of described carbon cloth, described carbon fiber width is flexural member
The 1/7 of width.Research finds: now the tensile property of carbon cloth is fully played, and carbon cloth consumption is minimum.
Preferably, the length that distance is flexural member of the centrage of the centrage of described carbon cloth and flexural member
0-1/18 times.Within the range, the tensile property of carbon cloth can be not fully exerted, by the optimization to installation site,
Expand the scope of application of carbon cloth, install for the component under some extreme condition and provide possibility.
The water proofing property that existing ECC pours material is not enough, along with external water invade, cause the reinforced concrete such as Yuan Liang, plate
Soil steel bar corrosion within flexural member increases the weight of, and service life significantly shortens.In order to solve this problem, in research, first add
Enter water-repelling agent and ECC is carried out hydrophobically modified so that the cracking mask behind ECC surface and generation crack has certain hydrophobicity.When
After flexural member produces certain bending, ECC material can produce a plurality of minute crack, owing to cracking mask has certain hydrophobicity, energy
Enough with effectively stoping external water intrusions.Add hydrophobic nano level mineral material the most in the ecc, on the one hand can strengthen ECC
Surface and produce the hydrophobicity in the cracking face behind crack, on the other hand can also effective leading to of immersing of blocking portion external world water
Road, solves under miniature deformation, waterproof, the antirust problem of bent member.
This utility model additionally provides a kind of water proofing property ECC and carbon cloth composite consolidation material, including: add additive
ECC, carbon cloth；
Described ECC raw material includes cement, first level flour coal ash, silica sand, thickening agent, water reducer, water, PVA fiber；
Described additive includes: hydrophobic material, and volume is the 0.01%-0.1% of cement quality；Hydrophobic nano level ore deposit
Thing material, volume is the 0.5%-1.5% of cement quality.
The Reinforced Concrete Members with Flexure such as ECC Yu Yuan Liang, plate has good adhesive property, and itself has stronger answering
Change ability (typically more than 3%), after flexural member produces certain deformation, still is able to fit tightly with it, solves engineering
The problem that upper conventional resin dipping glue carbon cloth easily comes unglued after flexural member produces certain deformation, it is ensured that carbon is fine
The tensile property of dimension cloth has obtained fully playing ECC and has served as carbon cloth protective layer, also solves carbon cloth and is afraid of naked light, fearness
The shortcoming clashed into, can effectively protect the carbon cloth of inside.
Preferably, described ECC is made up of the raw material of following weight portion: cement 80-120 part, first level flour coal ash 100-150
Part, silica sand 80-100 part, thickening agent 0.1-0.15 part, water reducer 1-50 part, PVA fiber volume 1.5-2.5 part, ratio of mud 0.3-
0.45。
Preferably, described ECC is made up of the raw material of following weight portion: cement 80-100 part, first level flour coal ash 100-125
Part, silica sand 80-90 part, thickening agent 0.1-0.125 part, water reducer 1-25 part, PVA fiber volume 1.5-2 part, ratio of mud 0.3-
0.375。
Preferably, described ECC is made up of the raw material of following weight portion: cement 100-120 part, first level flour coal ash 125-150
Part, silica sand 90-100 part, thickening agent 0.125-0.15 part, water reducer 25-50 part, PVA fiber volume 2.0-2.5 part, the ratio of mud
0.375-0.45。
Preferably, described hydrophobic material is modified polymethyl hydrogen siloxane.
Preferably, described hydrophobic nano level mineral material is hydrophobic nanoscale calcium carbonate.
Preferably, the limit tensile strain of described ECC reaches more than 3%, and limit fracture width is less than 100 μm.
This utility model additionally provides the preparation method of a kind of water proofing property ECC and carbon cloth composite consolidation material, including:
It is sequentially added into the solid constituents such as cement, flyash, silica sand, thickening agent, hydrophobic nanoscale calcium carbonate, low rate mixing, mixing time
For t2；Add stir water, water reducer, the solid constituent such as modified polymethyl hydrogen siloxane, low rate mixing, mixing time is
t1, more quickly stir, mixing time is t2；Adding PVA fiber, quickly stir, mixing time is t3；Manual overturning ECC mixing
Material, more quickly stir, mixing time is t1；
Described t1=1 minute, t2=2 minutes, t3=6 minutes.
The beneficial effects of the utility model
1, ECC can also directly as the reinforcement material of the mixed reinforcing bar such as beam, plate solidifying soil flexural member, but the production of ECC
Cost is higher.ECC and carbon cloth with the use of, allow carbon cloth as undertaking the main bearing member of drawing-resistant function, ECC
Primarily serve the effect on former flexural member that is firmly pasted onto by carbon cloth, also take on part pulling force simultaneously.Effectively play
Bi-material respective advantage, also reduces construction costs simultaneously.Engineering has practical significance.
2, the Reinforced Concrete Members with Flexure such as ECC Yu Yuan Liang, plate has good adhesive property, and itself has stronger
Adaptability to changes (typically more than 3%), after flexural member produces certain deformation, still is able to fit tightly with it, solves work
The problem that resin dipping glue carbon cloth conventional in journey easily comes unglued after flexural member produces certain deformation, it is ensured that carbon
The tensile property of fiber cloth is fully played.
3, in order to solve the problem that affixing carbon fabric easily comes unglued in engineering, through gluing frequently with the method for subsection tension anchoring
Patch carbon cloth, uses the ECC material as affixing carbon fabric instead, it is only necessary to carbon cloth two ends are shifted to an earlier date stretch-draw anchor, then
Pour or spray ECC, simplifying operational procedure.
4, ECC is than the excellent in durability of resin dipping glue.
5, ECC serves as carbon cloth protective layer, also solves carbon cloth and is afraid of naked light, is afraid of the shortcoming of shock, can be effective
Carbon cloth within Bao Hu.
6, with the addition of class hydrophobic materials such as modified polymethyl hydrogen siloxane in the ecc, and hydrophobic nano carbonic acid
Calcium etc. one class hydrophobic nano mineral material.Polymethyl hydrogen siloxane can make ECC have certain hydrophobicity；Hydrophobic nano
On the one hand calcium carbonate can strengthen the hydrophobicity of ECC, on the other hand less due to its particle diameter, can effective blocking portion external world water
The passage invaded.Both additives, so that after ECC produces a plurality of minute crack, it is possible to effectively stop external water to invade, anti-
The only steel bar corrosion within the Reinforced Concrete Members with Flexure such as Yuan Liang, plate.
Accompanying drawing explanation
Fig. 1 is water proofing property ECC with carbon cloth composite consolidation material for reinforcing the front view of beam body；
Fig. 2 is water proofing property ECC with carbon cloth composite consolidation material for reinforcing the upward view of beam body；
Wherein, 1. Reinforced Concrete Members with Flexure, the anchoring of 2.ECC layer, 3. carbon fibre cloth layer, 4. through hole, 5. stretching end fill
Put.
Detailed description of the invention
By the following examples this utility model feature and other correlated characteristic are described in further detail, in order to
The understanding of industry technology personnel:
Embodiment 1
A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation, including: Reinforced Concrete Members with Flexure
Body, is coated with at described flexural member by the carbon fibre cloth layer of curved side, is cast in the ECC layer outside described carbon cloth.
The Reinforced Concrete Members with Flexure such as ECC Yu Yuan Liang, plate has good adhesive property, and itself has stronger answering
Change ability (typically more than 3%), after flexural member produces certain deformation, still is able to fit tightly with it, solves engineering
The problem that upper conventional resin dipping glue carbon cloth easily comes unglued after flexural member produces certain deformation, it is ensured that carbon is fine
The tensile property of dimension cloth has obtained fully playing ECC and has served as carbon cloth protective layer, also solves carbon cloth and is afraid of naked light, fearness
The shortcoming clashed into, can effectively protect the carbon cloth of inside.
Embodiment 2
A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation, including: Reinforced Concrete Members with Flexure
Body, is coated with at described flexural member by the carbon fibre cloth layer of curved side, is cast in the ECC layer outside described carbon cloth.
The two ends of described carbon fibre cloth layer are positioned on described flexural member by stretch-draw anchor.
In order to solve the problem that affixing carbon fabric easily comes unglued in engineering, through pasting frequently with the method for subsection tension anchoring
Carbon cloth, uses the ECC material as affixing carbon fabric instead, it is only necessary to carbon cloth two ends are shifted to an earlier date stretch-draw anchor, then waters
Build or spray ECC, simplifying operational procedure.
Embodiment 3
A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation, including: Reinforced Concrete Members with Flexure
Body, is coated with at described flexural member by the carbon fibre cloth layer of curved side, is cast in the ECC layer outside described carbon cloth.
The 2/3 of a length of flexural member length of described carbon cloth, described carbon fiber width is flexural member width
1/7.Research finds: now the tensile property of carbon cloth is fully played, and carbon cloth consumption is minimum.
Embodiment 4
A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation, including: Reinforced Concrete Members with Flexure
Body, is coated with at described flexural member by the carbon fibre cloth layer of curved side, is cast in the ECC layer outside described carbon cloth.
The 0-1/18 of the length that distance is flexural member of the centrage of described carbon cloth and the centrage of flexural member
Times.Within the range, the tensile property of carbon cloth can be not fully exerted, and by the optimization to installation site, expands
The scope of application of carbon cloth, installs for the component under some extreme condition and provides possibility.
Embodiment 5
1, the raw material of ECC, including cement, flyash, silica sand, thickening agent, PVA fiber, water reducer, water, modified poly-methyl
Hydrogen siloxane etc. one class hydrophobic material, and a class hydrophobic nano mineral material such as hydrophobic nanoscale calcium carbonate.By cement
Quality is set to 1, and first level flour coal ash consumption is 1.0-1.5 times of cement quality, and silica sand consumption is 0.8-1.0 times of cement quality,
Thickening agent consumption is the 0.1%-0.15% of cement quality, ratio of mud 0.3-0.45, and water reducer consumption is the 0-of cement consumption
The one class hydrophobic material volumes such as 0.5%, PVA fiber volume volume is 1.5%-2.5%, modified polymethyl hydrogen siloxane are water
The 0.01%-0.1% of shale amount, a class hydrophobic nano mineral material volume such as hydrophobic nanoscale calcium carbonate is cement quality
0.5%-1.5%.
2, ECC stirs with planetary mortar mixer or ECC special-purpose stirring machine and forms, and feeding sequence and mixing time are such as
Under: add the solid constituents such as cement, flyash, silica sand, thickening agent, hydrophobic nanoscale calcium carbonate, low rate mixing 2 minutes；Add
Liquid component, low rate mixing 1 minute, the more quickly stirrings 2 points such as the water of mix homogeneously, water reducer, modified polymethyl hydrogen siloxane
Clock；Add PVA fiber, quickly stirring 6 minutes；Manual overturning ECC compound, more quickly stirring 1 minute.
3, the ECC of mix is under the conditions of standard curing after maintenance 28 days, carries out tension test, has significantly strain
Hardening capacity, can produce many fine and closely woven cracks under tensile force effect, and limit tensile strain reaches more than 3%, limit crack
Width is less than 100 μm.
4, the Reinforced Concrete Members with Flexure such as the beam needed reinforcement, plate are reinforced coarse (the laying carbon cloth portion of face polishing
Divide and do not polish), clean out, spread carbon cloth, and at two ends stretch-draw anchor.The kind of carbon cloth and size, according to reality
Border stressing conditions determines.Pour one layer in whole reinforcing face and newly mix ECC compound.After maintenance 28d, reinforcement completes.
Embodiment 6
1, the raw material of ECC, including cement, flyash, silica sand, thickening agent, PVA fiber, water reducer, water, modified poly-methyl
Hydrogen siloxane etc. one class hydrophobic material, and a class hydrophobic nano mineral material such as hydrophobic nanoscale calcium carbonate.By cement
Quality is set to 1, and first level flour coal ash consumption is 1.0 times of cement quality, and silica sand consumption is 0.8 times of cement quality, and thickening agent is used
Amount is the 0.1% of cement quality, and the ratio of mud 0.3, water reducer consumption is the 0.1% of cement consumption, and PVA fiber volume volume is
1.5%, a class hydrophobic material volume such as modified polymethyl hydrogen siloxane is the 0.01% of cement quality, hydrophobic nano carbonic acid
Calcium etc. one class hydrophobic nano mineral material volume is the 0.5% of cement quality.
2, ECC stirs with planetary mortar mixer or ECC special-purpose stirring machine and forms, and feeding sequence and mixing time are such as
Under: add the solid constituents such as cement, flyash, silica sand, thickening agent, hydrophobic nanoscale calcium carbonate, low rate mixing 2 minutes；Add
Liquid component, low rate mixing 1 minute, the more quickly stirrings 2 points such as the water of mix homogeneously, water reducer, modified polymethyl hydrogen siloxane
Clock；Add PVA fiber, quickly stirring 6 minutes；Manual overturning ECC compound, more quickly stirring 1 minute.
3, the ECC of mix is under the conditions of standard curing after maintenance 28 days, carries out tension test, has significantly strain
Hardening capacity, can produce many fine and closely woven cracks under tensile force effect, and limit tensile strain reaches more than 3%, limit crack
Width is less than 100 μm.
4, the Reinforced Concrete Members with Flexure such as the beam needed reinforcement, plate are reinforced coarse (the laying carbon cloth portion of face polishing
Divide and do not polish), clean out, spread carbon cloth, and at two ends stretch-draw anchor.The kind of carbon cloth and size, according to reality
Border stressing conditions determines.Pour one layer in whole reinforcing face and newly mix ECC compound.After maintenance 28d, reinforcement completes.
Embodiment 7
1, the raw material of ECC, including cement, flyash, silica sand, thickening agent, PVA fiber, water reducer, water, modified poly-methyl
Hydrogen siloxane etc. one class hydrophobic material, and a class hydrophobic nano mineral material such as hydrophobic nanoscale calcium carbonate.By cement
Quality is set to 1, and first level flour coal ash consumption is 1.5 times of cement quality, and silica sand consumption is 1.0 times of cement quality, and thickening agent is used
Amount is the 0.15% of cement quality, and the ratio of mud 0.45, water reducer consumption is the 0.5% of cement consumption, and PVA fiber volume volume is
2.5%, a class hydrophobic material volume such as modified polymethyl hydrogen siloxane is the 0.1% of cement quality, hydrophobic nano carbonic acid
Calcium etc. one class hydrophobic nano mineral material volume is the 1.5% of cement quality.
2, ECC stirs with planetary mortar mixer or ECC special-purpose stirring machine and forms, and feeding sequence and mixing time are such as
Under: add the solid constituents such as cement, flyash, silica sand, thickening agent, hydrophobic nanoscale calcium carbonate, low rate mixing 2 minutes；Add
The liquid components such as the water that stirs, water reducer, modified polymethyl hydrogen siloxane, low rate mixing 1 minute is, more quickly stirring 2 points
Clock；Add PVA fiber, quickly stirring 6 minutes；Manual overturning ECC compound, more quickly stirring 1 minute.
3, the ECC of mix is under the conditions of standard curing after maintenance 28 days, carries out tension test, has significantly strain
Hardening capacity, can produce many fine and closely woven cracks under tensile force effect, and limit tensile strain reaches more than 3%, limit crack
Width is less than 100 μm.
4, the Reinforced Concrete Members with Flexure such as the beam needed reinforcement, plate are reinforced coarse (the laying carbon cloth portion of face polishing
Divide and do not polish), clean out, spread carbon cloth, and at two ends stretch-draw anchor.The kind of carbon cloth and size, according to reality
Border stressing conditions determines.Pour one layer in whole reinforcing face and newly mix ECC compound.After maintenance 28d, reinforcement completes.
Result shows:
Under conditions of flexural member produces certain deformation, water absorption rate of the present utility model than common ECC reduce by 10～
30%.
Table 1
In table 1, ratio is mass ratio (PVA fiber consumption refers to volume fraction).
Finally should be noted that and the foregoing is only preferred embodiment of the present utility model, be not limited to
This utility model, although being described in detail this utility model with reference to previous embodiment, for those skilled in the art
For Yuan, the technical scheme described in previous embodiment still can be modified by it, or is equal to wherein part
Replace.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in
Within protection domain of the present utility model.Although detailed description of the invention of the present utility model is retouched by the above-mentioned accompanying drawing that combines
State, but not restriction to this utility model protection domain, one of ordinary skill in the art should be understood that in skill of the present utility model
On the basis of art scheme, those skilled in the art need not to pay various amendments that creative work can make or deformation still exists
Within protection domain of the present utility model.
Claims (4)
1. an ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation, it is characterised in that including: reinforced concrete
Soil flexural member body, is coated with the carbon fibre cloth layer in described flexural member side, is cast in the ECC outside described carbon cloth
Layer.
ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation the most according to claim 1, it is characterised in that
The two ends of described carbon fibre cloth layer are positioned on described flexural member by stretch-draw anchor.
ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation the most according to claim 1, it is characterised in that
The 2/3 of a length of flexural member length of described carbon cloth, described carbon fiber width is the 1/7 of flexural member width.
ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation the most according to claim 1, it is characterised in that
0-1/18 times of the length that distance is flexural member of the centrage of described carbon cloth and the centrage of flexural member.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620364740.8U CN205857782U (en) | 2016-04-27 | 2016-04-27 | A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620364740.8U CN205857782U (en) | 2016-04-27 | 2016-04-27 | A kind of ECC and the Reinforced Concrete Members with Flexure of carbon cloth composite consolidation |
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| CN205857782U true CN205857782U (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406582A (en) * | 2018-12-28 | 2019-03-01 | 南水北调东线总公司 | A kind of Structure Damage Identification using carbon fiber change in resistance |
| CN112982199A (en) * | 2021-03-19 | 2021-06-18 | 河北水熠木丰工程技术有限责任公司 | Bridge fiber reinforced structure and construction method thereof |
-
2016
- 2016-04-27 CN CN201620364740.8U patent/CN205857782U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406582A (en) * | 2018-12-28 | 2019-03-01 | 南水北调东线总公司 | A kind of Structure Damage Identification using carbon fiber change in resistance |
| CN112982199A (en) * | 2021-03-19 | 2021-06-18 | 河北水熠木丰工程技术有限责任公司 | Bridge fiber reinforced structure and construction method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |