CN113374175A - Corrosion-resistant CFRP-high-strength steel composite pipe sea aggregate seawater concrete combined column - Google Patents
Corrosion-resistant CFRP-high-strength steel composite pipe sea aggregate seawater concrete combined column Download PDFInfo
- Publication number
- CN113374175A CN113374175A CN202110719184.7A CN202110719184A CN113374175A CN 113374175 A CN113374175 A CN 113374175A CN 202110719184 A CN202110719184 A CN 202110719184A CN 113374175 A CN113374175 A CN 113374175A
- Authority
- CN
- China
- Prior art keywords
- strength steel
- cfrp
- wall
- steel pipe
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 177
- 239000010959 steel Substances 0.000 title claims abstract description 177
- 239000004567 concrete Substances 0.000 title claims abstract description 98
- 239000013535 sea water Substances 0.000 title claims abstract description 85
- 239000002131 composite material Substances 0.000 title claims abstract description 83
- 230000007797 corrosion Effects 0.000 title claims abstract description 52
- 238000005260 corrosion Methods 0.000 title claims abstract description 52
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims abstract description 125
- 239000004744 fabric Substances 0.000 claims abstract description 120
- 239000000853 adhesive Substances 0.000 claims description 31
- 230000001070 adhesive effect Effects 0.000 claims description 31
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 21
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 239000004917 carbon fiber Substances 0.000 claims description 20
- 239000004576 sand Substances 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- 235000014653 Carica parviflora Nutrition 0.000 claims description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 17
- 241000243321 Cnidaria Species 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 9
- 239000011707 mineral Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 6
- 229910021487 silica fume Inorganic materials 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 239000011083 cement mortar Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000007580 dry-mixing Methods 0.000 claims description 3
- 239000012258 stirred mixture Substances 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 12
- 239000011398 Portland cement Substances 0.000 description 5
- 208000002740 Muscle Rigidity Diseases 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 244000132059 Carica parviflora Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
- E04B1/642—Protecting metallic construction elements against corrosion
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/012—Discrete reinforcing elements, e.g. fibres
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/015—Anti-corrosion coatings or treating compositions, e.g. containing waterglass or based on another metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Laminated Bodies (AREA)
Abstract
本发明公开了耐腐蚀CFRP‑高强钢复合管海洋骨料海水混凝土组合柱，属于海洋建筑工程结构技术领域。本发明的耐腐蚀CFRP‑高强钢复合管海洋骨料海水混凝土组合柱由海洋骨料海水混凝土、高强钢管以及CFRP布组成；所述CFRP布粘贴于高强钢管内外壁形成CFRP‑高强钢复合管，所述海洋骨料混凝土填充于CFRP‑高强钢复合管内。本发明的组合柱能有效地阻挡氯离子对高强钢管内外壁的腐蚀，并能提高高强钢管海洋骨料海水混凝土的相关承载指标和耐久性，延长其服役寿命。
The invention discloses a corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column, which belongs to the technical field of marine construction engineering structures. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column of the present invention is composed of marine aggregate seawater concrete, high-strength steel pipe and CFRP cloth; the CFRP cloth is pasted on the inner and outer walls of the high-strength steel pipe to form a CFRP-high-strength steel composite pipe, The marine aggregate concrete is filled in the CFRP-high-strength steel composite pipe. The composite column of the invention can effectively block the corrosion of chloride ions to the inner and outer walls of the high-strength steel pipe, and can improve the relevant bearing index and durability of the marine aggregate seawater concrete of the high-strength steel pipe, and prolong its service life.
Description
Technical Field
The invention relates to the technical field of marine construction engineering structures, in particular to a corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column.
Background
Due to the gradual depletion of terrestrial resources on the earth and the requirement of continuous expansion of living space of human beings, the human beings enter the period of large-scale development and utilization of oceans. However, the construction and use of marine civil engineering have two fundamental problems of shortage of the source of construction materials and shortening of the service life of the construction structure, and the problems become fundamental problems limiting the development of marine civil engineering construction. On one hand, if a substitute material which can be obtained in situ, has proper performance and abundant reserves is found, the time cost and the economic cost of inland transportation of the building material can be reduced, and the problem of resource exhaustion caused by the over-exploitation of inland river sand can be relieved. Coral and sea sand as natural resource with rich sea reserves can be used as substitute material for traditional concrete coarse aggregate and concrete fine aggregate, so that the shortage of inland river sand resource is solved, ocean engineering can be performed according to local conditions, and the marine engineering construction accelerating method has great significance. On the other hand, the ocean has extremely severe natural environmental conditions, and the conventional steel and concrete structures face severe durability problems when used in the ocean. In addition, the direct utilization of marine aggregate seawater concrete also inevitably faces the problem of corrosion resistance of the internal reinforcement. Therefore, it is necessary to develop a new corrosion-resistant material to replace the conventional steel, which has better mechanical properties and ability to work with concrete.
China special for 2019, 7 and 26, with the application number of CN201821124170.0 discloses an FRP pipe composite bar sea sand concrete column, which avoids the problem of corrosion caused by using steel bars and successfully uses sea sand concrete, but does not improve the defects of poor shear resistance and brittle failure of FRP materials. China with application number CN104389381A specially favorable for 3/4/2015 discloses a composite column, a manufacturing method and a composite reinforcing method of the composite column, wherein the composite column comprises a thin steel pipe, a fireproof coating material, CFRP (carbon fiber reinforced plastics) cloth and concrete, the fireproof coating material, the CFRP cloth and the concrete are sleeved in the thin steel pipe, the fireproof and anti-seismic performance of the composite column is good, but the implementation process is complex, and the composite column does not have corrosion resistance.
Disclosure of Invention
The invention aims to provide a corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column which can effectively prevent chloride ions from corroding the inner wall and the outer wall of a high-strength steel pipe, can improve the relevant bearing index and durability of the marine aggregate seawater concrete of the high-strength steel pipe and prolong the service life of the marine aggregate seawater concrete combined column.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column consists of marine aggregate seawater concrete, a high-strength steel pipe and CFRP cloth; the CFRP cloth is adhered to the inner wall and the outer wall of the high-strength steel pipe to form a CFRP-high-strength steel composite pipe, and the marine aggregate concrete is filled in the CFRP-high-strength steel composite pipe. The CFRP cloth is adhered to the inner wall and the outer wall of the high-strength steel pipe, the external fiber bundles can prevent internal steel from being corroded and play a role in reinforcing the internal steel, and the CFRP cloth has the advantages of light weight, high strength, corrosion resistance and good mechanical property of steel pipe concrete.
Further, the marine aggregate seawater concrete comprises the following raw materials in parts by weight: 500 portions of cementing material 400-.
Further, the mineral admixture is any one or any combination of silica fume and fly ash.
Further, the cementing material is ordinary portland cement.
Further, the preparation method of the marine aggregate seawater concrete comprises the following steps:
s1, airing and drying the coral coarse aggregate and the sea sand, and controlling the water content within 1%;
s2, dry-mixing the coral coarse aggregate and the sea sand dried in the step S1 to be uniform, then adding part of seawater and stirring to enable the stirred mixture to be in a semi-wet state, and obtaining a mixture I;
s3, stirring the gelled material and the mineral admixture mixture I uniformly to obtain a mixture II;
and S4, adding the residual seawater into the mixture II, adding a water reducing agent, and uniformly stirring to obtain the marine aggregate seawater concrete.
The invention also provides a manufacturing method of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column, which comprises the following steps:
(1) cutting the CFRP cloth into corresponding inner wall CFRP cloth and outer wall CFRP cloth according to the sizes of the inner wall and the outer wall of the high-strength steel pipe;
(2) cleaning dust and attached impurities on the inner and outer surfaces of the high-strength steel pipe, and keeping the inner and outer surfaces of the steel pipe dry;
(3) uniformly coating structural adhesive on the inner wall of the high-strength steel pipe and two surfaces of the CFRP cloth on the inner wall, and winding the CFRP cloth on the inner wall onto an acrylic rod with the diameter of 1/4-1/6 of the inner diameter of the high-strength steel pipe;
(4) placing the acrylic rod wound with the CFRP cloth on the inner wall into a high-strength steel pipe, aligning and fixing the CFRP cloth on the inner wall with two ends of the high-strength steel pipe, placing a carbon fiber rod behind the acrylic rod, slowly rotating the carbon fiber rod to drive the acrylic rod to roll forwards, simultaneously separating the CFRP cloth on the inner wall from the acrylic rod and sticking the CFRP cloth on the inner wall of the high-strength steel pipe to the inner wall of the high-strength steel pipe, rolling the carbon fiber rod around the inner wall of the high-strength steel pipe again to discharge air bubbles, and ensuring that the CFRP cloth on the inner wall is tightly attached to the inner wall of the high-strength steel pipe;
(5) paving outer wall CFRP cloth and uniformly coating structural adhesive, and uniformly coating the outer wall of the high-strength steel pipe with the structural adhesive; firstly, horizontally placing and fixing a high-strength steel pipe, aligning and attaching one end of outer wall CFRP cloth with the high-strength steel pipe, pressing the end of the outer wall CFRP cloth after leveling bubbles, rotating the high-strength steel pipe to attach the residual outer wall CFRP cloth to the outer wall of the high-strength steel pipe, and repeating the step until the outer wall CFRP cloth is completely attached to the high-strength steel pipe to obtain a composite pipe, vertically placing the composite pipe at a clean and dry place, and after the structural adhesive is solidified, if 2 or more than 2 layers of outer wall CFRP cloth need to be attached to the outer wall of the composite pipe;
(6) and injecting the marine aggregate seawater concrete into the composite pipe, capping the pipe top of the composite pipe by using cement mortar, and curing to obtain the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column.
Further, the structural adhesive is carbon fiber impregnated adhesive, and the mass ratio of the adhesive A to the adhesive B of the carbon fiber impregnated adhesive is 2: 1, mixing.
Furthermore, the CFRP cloth is formed by weaving unidirectional continuous carbon fibers, has the characteristics of high strength, small density, thin thickness and the like, and basically does not increase the self weight and the section size of a member.
Further, the strength of the high-strength steel pipe is Q345 or more.
The corrosion-resistant CFRP-high-strength steel composite pipe takes a high-strength steel pipe as an inner core, steel and fiber materials wrapped outside are bonded and glued to form a whole through a resin matrix, the external fiber bundles can prevent the internal steel from being corroded and play a role in reinforcing the internal steel, and the internal steel makes up the disadvantage of poor shearing resistance of the CFRP material. Therefore, the corrosion-resistant CFRP-high-strength steel composite pipe combines the advantages of steel and CFRP, is expected to become a substitute of the traditional steel to be applied to ocean engineering construction, and provides a new idea for the development of ocean civil engineering.
The invention at least comprises the following beneficial effects:
1. the CFRP cloth adopted by the invention is a lightweight material taking carbon fiber fabric as a reinforcement, has the advantages of high tensile strength, linear elasticity, light weight, strong corrosion resistance, environmental protection and the like, is adhered to the inner wall and the outer wall of the high-strength steel pipe to form the CFRP-high-strength steel composite pipe, the fiber bundles outside the composite pipe can prevent internal steel from being corroded and play a role in reinforcing the internal steel, and the internal steel overcomes the defects of poor shear resistance and easy brittle fracture of the CFRP material. In addition, limited by the current technical level, the composite column is manufactured by using the steel pipe and the CFRP cloth with greater difficulty, so that the manufacturing process is complex, the manufacturing period is long, and the cost is high. The CFRP-high-strength steel composite pipe combines the advantages of steel and CFRP, has the advantages of corrosion resistance, light weight, high strength, good ductility and the like, and can promote the development of marine and offshore construction according to local conditions.
2. The marine aggregate seawater concrete adopted by the invention is composed of the following raw materials: coral coarse aggregate, sea sand, a cementing material, seawater, a mineral admixture and a water reducing agent, wherein the coral and the sea sand are respectively used as concrete coarse aggregate and concrete fine aggregate, and the seawater is used as water for mixing and culturing, which can be obtained locally, thereby reducing the production and transportation time and the economic cost; the added mineral admixture can effectively fill gaps in the coral coarse aggregate and improve the mechanical property of the marine aggregate concrete; the added water reducing agent can greatly improve the construction performance of the marine concrete.
3. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column manufactured by the invention simultaneously solves two fundamental problems of building material source shortage and building structure service life shortening in marine engineering construction. In addition, the novel combined column has the characteristics of high bearing capacity, high rigidity, high ductility and other mechanical properties, and has remarkable advantages in a large-span heavy-load structural system of ocean engineering.
Drawings
FIG. 1 is a schematic structural diagram of a corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column of the invention;
FIG. 2 is a schematic diagram of the CFRP cloth of the inner wall of the high-strength steel pipe in the invention;
FIG. 3 is a schematic diagram of CFRP cloth adhered to the outer wall of the high-strength steel pipe in the invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1
The method of the invention is used for manufacturing a corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column. The height of the high-strength steel pipe is 600mm, the diameter is 152mm, the wall thickness is 5mm, and the strength is Q345; the length of the cut CFRP cloth is 500mm, the width of the cut CFRP cloth is 600mm, the core concrete adopts marine aggregate seawater concrete, and the strength grade is C40. The method specifically comprises the following steps:
(I) manufacturing corrosion-resistant CFRP-high-strength steel composite pipe
Firstly, cleaning dust and impurities on the inner and outer surfaces of the high-strength steel pipe, and keeping the inner and outer surfaces of the high-strength steel pipe dry;
cutting and splicing a piece of required inner wall CFRP cloth according to design requirements, and uniformly coating structural adhesive on the inner wall of the high-strength steel pipe and two sides of the inner wall CFRP cloth; the structural adhesive is carbon fiber impregnated adhesive HM-180C3P, and specifically comprises an adhesive A and an adhesive B of the carbon fiber impregnated adhesive HM-180C3P in a mass ratio of 2: 1 are mixed.
Thirdly, winding the CFRP cloth on the inner wall onto an acrylic rod with the diameter being about 1/5 of the high-strength steel pipe, placing the acrylic rod into the high-strength steel pipe, aligning and fixing the CFRP cloth on the inner wall with two ends of the high-strength steel pipe, placing a carbon fiber rod behind the acrylic rod, slowly rotating the carbon fiber rod to drive the acrylic rod to roll forwards and simultaneously separate the CFRP cloth on the inner wall from the acrylic rod to be adhered to the inner wall of the high-strength steel pipe, and rolling the carbon fiber rod again for a circle around the inner wall of the high-strength steel pipe to discharge air bubbles so as to ensure that the CFRP cloth on the inner wall is tightly adhered to the inner wall of the high-strength steel pipe;
fourthly, cutting and splicing a piece of needed outer wall CFRP cloth according to design requirements, tiling the outer wall CFRP cloth and uniformly coating structural adhesive, and uniformly coating the outer wall of the high-strength steel pipe with the structural adhesive; firstly, horizontally placing and fixing a high-strength steel pipe, aligning and attaching one end of outer wall CFRP cloth to the high-strength steel pipe, pressing the end of the outer wall CFRP cloth after leveling bubbles, rotating the high-strength steel pipe to attach the residual outer wall CFRP cloth to the outer wall of the high-strength steel pipe, and performing the process until the outer wall CFRP cloth is completely attached to the steel pipe as shown in figure 3, and then leveling uneven places to remove bubbles and supplement glue at required places; and after the structural adhesive is solidified, the process of adhering CFRP cloth on the outer wall of the inner wall and the outer wall of the high-strength steel pipe is finished, and the manufacturing of the corrosion-resistant CFRP-high-strength steel composite pipe is finished.
(II) preparing marine aggregate seawater concrete
The marine aggregate seawater concrete provided by the embodiment comprises coral coarse aggregate, sea sand, a cementing material, seawater, a mineral admixture and a water reducing agent, and is prepared from the following raw materials in parts by weight: 455 parts of ordinary portland cement, 656 parts of coral coarse aggregate, 760 parts of sea sand, 260 parts of seawater, 40 parts of silica fume, 40 parts of fly ash and 0.84 part of water reducing agent, wherein the water reducing agent is a polycarboxylic acid high-performance water reducing agent. The preparation method of the marine aggregate seawater concrete comprises the following steps:
step one, drying coral coarse aggregate and sea sand in the sun, and controlling the water content within 1%;
secondly, putting the coral coarse aggregate and the sea sand dried in the first step into a stirrer for dry stirring until the mixture is uniform, and then adding half of seawater for stirring for 2 minutes to ensure that the mixture is in a semi-wet state;
thirdly, putting the cementing material and the mineral admixture into a stirrer and stirring the mixture and the product obtained in the second step to be uniform;
and step four, adding the residual seawater used in the step two into the product obtained in the step three, adding a water reducing agent, and stirring uniformly to obtain the marine aggregate seawater concrete.
(III) manufacturing corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column
Firstly, sealing one end of a manufactured corrosion-resistant CFRP-high-strength steel composite pipe to prevent slurry leakage in the pouring process, and fixing the corrosion-resistant CFRP-high-strength steel composite pipe on a horizontal ground;
secondly, pouring the prepared marine aggregate seawater concrete into the composite pipe in three layers, and fully vibrating by using a vibrating rod when pouring each layer so as to prevent a honeycomb pitted surface formed due to insufficient concrete flow and prevent segregation and bleeding caused by excessive vibration;
and thirdly, performing slurry collection treatment on the poured surface concrete of the column top to ensure the flatness of the column top, capping the tube top with cement mortar, and periodically maintaining for 28 days to finish the manufacture of the corrosion-resistant CFRP-high-strength steel composite tube marine aggregate seawater concrete combined column.
As shown in fig. 1, in order to manufacture the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete composite column, the inner wall CFRP cloth is adhered to the inner wall of the high-strength steel pipe, the outer wall CFRP cloth is adhered to the outer wall of the high-strength steel pipe, and the marine aggregate concrete is filled in the CFRP-high-strength steel composite pipe.
Example 2
A corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column is composed of marine aggregate seawater concrete, a high-strength steel pipe and CFRP cloth; the CFRP cloth is adhered to the inner wall and the outer wall of the high-strength steel pipe to form a CFRP-high-strength steel composite pipe, and the marine aggregate concrete is filled in the CFRP-high-strength steel composite pipe. The manufacturing method of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column comprises the following three main steps: CFRP cloth is pasted on the inner wall of the high-strength steel pipe, CFRP cloth is pasted on the outer wall of the high-strength steel pipe, and marine aggregate concrete is filled in the CFRP cloth and the CFRP cloth; the method comprises the following specific steps:
step 1) calculating the area of an inner wall according to the inner diameter of a high-strength steel pipe, designing the transverse and longitudinal lap joint lengths according to GB50608-2020 fiber reinforced composite engineering application technical standard, and splicing and pasting several cut sections of CFRP cloth into complete inner wall CFRP cloth capable of winding the inner wall for a circle;
step 2) carrying out rust removal treatment on the inner and outer surfaces of the high-strength steel pipe, then wiping and cleaning the inner and outer walls of the high-strength steel pipe by using alcohol, removing dust and attached impurities, and keeping the inner wall of the column dry and comfortable so as to ensure that the bonding property of the structural adhesive in the subsequent process is not influenced;
step 3) preparing a structural adhesive according to the method of the embodiment 1, preparing an acrylic rod with the diameter being about 1/5 of the high-strength steel pipe and a solid carbon fiber rod for adhering the CFRP cloth on the inner wall, wherein the acrylic rod with the proper size can ensure uniform adhesive coating when adhering the CFRP cloth on the inner wall by using the self weight of the acrylic rod, and simultaneously, the CFRP cloth is prevented from being driven to roll together when rolling due to too large self weight; spreading CFRP cloth on the inner wall on a table top, and uniformly coating structural adhesive on the inner wall of the high-strength steel pipe;
step 4) winding the inner wall CFRP cloth uniformly coated with the structural adhesive on an acrylic rod temporarily in a smooth manner, hanging the acrylic rod and the inner wall CFRP cloth in a horizontal manner to penetrate through the inner wall of the high-strength steel pipe, ensuring that the wound inner wall CFRP cloth does not fall off and does not contact the inner wall of the round pipe in the process, aligning the front end and the rear end of the inner wall CFRP cloth to be attached to the mark points at the upper end and the lower end of the high-strength steel pipe, and slowly putting down the acrylic rod to lightly press the inner wall of the steel pipe;
step 5) slowly rotating the acrylic rod along the inner wall of the high-strength steel pipe to enable the CFRP cloth on the inner wall to be separated from the acrylic rod and to be attached to the inner wall of the high-strength steel pipe, repeatedly extruding the CFRP cloth separated from the acrylic rod by using a solid carbon fiber rod, extruding bubbles on the inner wall and compacting the CFRP cloth on the inner wall, and ensuring that the CFRP cloth on the inner wall is completely attached to the inner wall of the steel pipe;
and 6) executing the step 5) until the CFRP cloth on the inner wall completely falls off from the acrylic rod and is completely compacted, suspending and drawing the acrylic rod and the solid carbon fiber rod out of the high-strength steel pipe in a suspending manner in sequence, wherein the CFRP cloth on the adhered inner wall cannot be touched in the process, horizontally placing the composite pipe on which the CFRP cloth on the inner wall is adhered at a clean and dry position for waiting for solidification of the structural adhesive, and finishing the process of adhering the CFRP cloth on the inner wall of the high-strength steel pipe.
Step 7) cutting the CFRP cloth into corresponding outer wall CFRP cloth according to the size of the outer wall of the high-strength steel pipe, tiling the outer wall CFRP cloth, uniformly coating structural adhesive on the joint surface of the outer wall CFRP cloth and the pipe, and uniformly coating the structural adhesive on the outer wall of the high-strength steel pipe; fixing the high-strength steel pipe, distributing CFRP (carbon fiber reinforced plastics) cloth close to the steel pipe horizontally to be attached to the steel pipe, leveling bubbles, pressing the end of the CFRP cloth to rotate the steel pipe to enable the residual CFRP cloth to be attached to the outer wall of the steel pipe, and carrying out the process until the CFRP cloth on the outer wall is completely attached to the steel pipe;
and 8) vertically placing the high-strength steel pipe adhered with the CFRP cloth on the outer wall, removing air bubbles at uneven places and supplementing glue at required places, vertically placing the finished composite pipe at a clean and dry place, after the structural glue is solidified, finishing the process of adhering the CFRP cloth on the outer wall of the high-strength steel pipe, and repeating the step of adhering the CFRP cloth on the outer wall of the high-strength steel pipe if 2 or more layers of CFRP cloth are adhered on the outer wall of the high-strength steel pipe.
Step 9) sealing one end of the manufactured corrosion-resistant CFRP-high-strength steel composite pipe to prevent slurry leakage in the pouring process, and fixing the corrosion-resistant CFRP-high-strength steel composite pipe on a horizontal ground; then injecting the prepared marine aggregate seawater concrete into the pipe, wherein the marine aggregate seawater concrete is prepared from the following raw materials in parts by weight: 425 parts of ordinary portland cement, 630 parts of coral coarse aggregate, 720 parts of sea sand, 240 parts of sea water, 40 parts of silica fume, 35 parts of fly ash and 0.82 part of water reducing agent, and reasonable layered vibration is needed to avoid honeycomb pitted surface of concrete in the pipe; and finally, sealing the top of the pipe by using cement mortar, and curing for 28 days at regular intervals to finish the manufacture of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column.
The preparation method of the marine aggregate seawater concrete comprises the following steps:
s1, airing and drying the coral coarse aggregate and the sea sand, and controlling the water content within 1%;
s2, dry-mixing the coral coarse aggregate and the sea sand dried in the step S1 to be uniform, then adding part of seawater and stirring to enable the stirred mixture to be in a semi-wet state, and obtaining a mixture I;
s3, stirring the gelled material and the mineral admixture mixture I uniformly to obtain a mixture II;
and S4, adding the residual seawater into the mixture II, adding a water reducing agent, and uniformly stirring to obtain the marine aggregate seawater concrete.
Example 3
The manufacturing method of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column is the same as that in the embodiment 1, wherein the marine aggregate seawater concrete is composed of the following raw materials in parts by weight: 400 parts of ordinary portland cement, 600 parts of coral coarse aggregate, 700 parts of sea sand, 200 parts of seawater, 30 parts of silica fume, 40 parts of fly ash and 0.8 part of water reducing agent, wherein the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
Example 4
The manufacturing method of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column is the same as that in the embodiment 2, wherein the marine aggregate seawater concrete is composed of the following raw materials in parts by weight: 500 parts of ordinary portland cement, 700 parts of coral coarse aggregate, 800 parts of sea sand, 300 parts of seawater, 50 parts of silica fume, 40 parts of fly ash and 0.9 part of water reducing agent, wherein the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
Effect verification
In order to further illustrate that the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column has the characteristics of high bearing capacity, high rigidity, high ductility and other mechanical properties, and simultaneously proves that the manufacturing method of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column has great influence on the mechanical properties of a finished product, the applicant performs the following comparative tests:
the test was carried out in six groups:
a first group: the high-strength steel marine aggregate seawater concrete column (without CFRP cloth) manufactured by the method of the embodiment 1 of the invention;
second group: firstly, manufacturing a CFRP cloth-coated high-strength pipe according to the method disclosed in the Chinese patent with the application number of CN201710200442.4, coating two layers of CFRP cloth, preparing marine aggregate seawater concrete according to the embodiment 1 of the invention, and finally combining to form the CFRP cloth-coated high-strength pipe marine aggregate seawater concrete column (CFRP cloth without an inner wall);
third group: manufacturing a CFRP cloth-coated high-strength pipe according to the method of the embodiment 1 of the invention, coating two layers of CFRP cloth, preparing marine aggregate seawater concrete according to the embodiment 1 of the invention, and finally combining to form a CFRP cloth-coated high-strength pipe marine aggregate seawater concrete column (CFRP cloth without an inner wall);
and a fourth group: the high-strength tube marine aggregate seawater concrete column internally adhered with the CFRP cloth manufactured according to the embodiment 1 of the invention has a layer of CFRP cloth (CFRP cloth without an outer wall) internally adhered;
fifth and sixth groups: the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column manufactured according to the embodiment 1 of the invention is characterized in that the fifth group is wrapped by one layer and internally pasted by one layer of CFRP cloth, and the sixth group is wrapped by two layers and internally pasted by one layer of CFRP cloth.
The six groups of marine aggregate seawater concrete composite columns are subjected to partial performance test, and the recorded data are shown in table 1:
TABLE 1
According to the table 1, the bearing capacity of the marine aggregate concrete column with the single-layer CFRP cloth high-strength steel pipes pasted on the inner side is higher than that of the marine aggregate concrete column with the double-layer CFRP cloth high-strength steel pipes pasted on the outer side, the bearing capacity of the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate concrete combined column formed by pasting CFRP cloth on the two sides is also obviously higher than that of the marine aggregate concrete columns with the CFRP cloth high-strength steel pipes pasted on the single sides of the second to the fourth groups, and the secondary rigidity of the combined column after yielding is also improved to a certain extent; meanwhile, the good mechanical property of the high-strength steel pipe enables the combined column to have a larger axial-pressure ductility coefficient and better deformation performance, so that the corrosion-resistant CFRP-high-strength steel composite pipe made by simultaneously adhering CFRP cloth on the inner wall and the outer wall has better mechanical property and corrosion resistance, and the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column compounded with the marine aggregate seawater concrete is a novel combined structure with high bearing capacity, large rigidity and high ductility.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The corrosion-resistant CFRP-high-strength steel composite pipe sea aggregate seawater concrete combined column is characterized in that: the marine concrete is composed of marine aggregate seawater concrete, a high-strength steel pipe and CFRP cloth; the CFRP cloth is adhered to the inner wall and the outer wall of the high-strength steel pipe to form a CFRP-high-strength steel composite pipe, and the marine aggregate concrete is filled in the CFRP-high-strength steel composite pipe.
2. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column as claimed in claim 1, wherein: the marine aggregate seawater concrete is prepared from the following raw materials in parts by weight: 500 portions of cementing material 400-.
3. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column as claimed in claim 2, wherein: the mineral admixture is any one or any combination of silica fume and fly ash.
4. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column as claimed in claim 2, wherein the preparation method of the marine aggregate seawater concrete comprises the following steps:
s1, airing and drying the coral coarse aggregate and the sea sand, and controlling the water content within 1%;
s2, dry-mixing the coral coarse aggregate and the sea sand dried in the step S1 to be uniform, then adding part of seawater and stirring to enable the stirred mixture to be in a semi-wet state, and obtaining a mixture I;
s3, stirring the gelled material, the mineral admixture and the mixture I uniformly to obtain a mixture II;
and S4, adding the residual seawater into the mixture II, adding a water reducing agent, and uniformly stirring to obtain the marine aggregate seawater concrete.
5. The method for manufacturing the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column as claimed in any one of claims 1 to 4, is characterized by comprising the following steps:
(1) cutting the CFRP cloth into corresponding inner wall CFRP cloth and outer wall CFRP cloth according to the sizes of the inner wall and the outer wall of the high-strength steel pipe;
(2) cleaning dust and attached impurities on the inner and outer surfaces of the high-strength steel pipe, and keeping the inner and outer surfaces of the steel pipe dry;
(3) uniformly coating structural adhesive on the inner wall of the high-strength steel pipe and two surfaces of the CFRP cloth on the inner wall, and winding the CFRP cloth on the inner wall onto an acrylic rod with the diameter of 1/4-1/6 of the inner diameter of the high-strength steel pipe;
(4) placing the acrylic rod wound with the CFRP cloth on the inner wall into a high-strength steel pipe, aligning and fixing the CFRP cloth on the inner wall with two ends of the high-strength steel pipe, placing a carbon fiber rod behind the acrylic rod, slowly rotating the carbon fiber rod to drive the acrylic rod to roll forwards, simultaneously separating the CFRP cloth on the inner wall from the acrylic rod and sticking the CFRP cloth on the inner wall of the high-strength steel pipe to the inner wall of the high-strength steel pipe, rolling the carbon fiber rod around the inner wall of the high-strength steel pipe again to discharge air bubbles, and ensuring that the CFRP cloth on the inner wall is tightly attached to the inner wall of the high-strength steel pipe;
(5) paving outer wall CFRP cloth and uniformly coating structural adhesive, and uniformly coating the outer wall of the high-strength steel pipe with the structural adhesive; firstly, horizontally placing and fixing a high-strength steel pipe, aligning and attaching one end of outer wall CFRP cloth with the high-strength steel pipe, pressing the end of the outer wall CFRP cloth after leveling bubbles, rotating the high-strength steel pipe to enable the remaining outer wall CFRP cloth to be attached to the outer wall of the high-strength steel pipe, and repeating the step until the outer wall CFRP cloth is completely attached to the high-strength steel pipe to obtain a composite pipe;
(6) and injecting the marine aggregate seawater concrete into the composite pipe, capping the pipe top of the composite pipe by using cement mortar, and curing to obtain the corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column.
6. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column as claimed in claim 5, wherein: the structural adhesive is carbon fiber impregnated adhesive.
7. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column as claimed in claim 1, wherein: the CFRP cloth is formed by weaving unidirectional continuous carbon fibers.
8. The corrosion-resistant CFRP-high-strength steel composite pipe marine aggregate seawater concrete combined column as claimed in claim 1, wherein: the strength of the high-strength steel pipe is more than Q345.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110719184.7A CN113374175A (en) | 2021-06-28 | 2021-06-28 | Corrosion-resistant CFRP-high-strength steel composite pipe sea aggregate seawater concrete combined column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110719184.7A CN113374175A (en) | 2021-06-28 | 2021-06-28 | Corrosion-resistant CFRP-high-strength steel composite pipe sea aggregate seawater concrete combined column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113374175A true CN113374175A (en) | 2021-09-10 |
Family
ID=77579419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110719184.7A Pending CN113374175A (en) | 2021-06-28 | 2021-06-28 | Corrosion-resistant CFRP-high-strength steel composite pipe sea aggregate seawater concrete combined column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113374175A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837297A (en) * | 2022-05-31 | 2022-08-02 | 福州大学 | Novel ocean engineering structure and construction method thereof |
| CN115467470A (en) * | 2022-09-29 | 2022-12-13 | 中国二十二冶集团有限公司 | Method for improving tensile property of round CFRP-concrete filled steel tube |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202672489U (en) * | 2012-07-13 | 2013-01-16 | 湖南大学 | Reinforced concrete column restrained by composite bushing |
| CN103015631A (en) * | 2012-12-13 | 2013-04-03 | 广西大学 | Built-in polyvinyl chloride (PVC) pipe enhanced square steel pipe concrete combined column |
| CN104695628A (en) * | 2015-03-17 | 2015-06-10 | 华北水利水电大学 | Novel anti-corrosion fire-resisting column |
| KR101712378B1 (en) * | 2016-09-07 | 2017-03-06 | 비제이엠텍(주) | Repairing or reinforcing method of concrete structure using alkali recovering rust prevention and inorganic polymer mortar composition |
| CN106836649A (en) * | 2017-03-30 | 2017-06-13 | 韦灼彬 | Coral concrete combining structure post is filled out in fiber cloth outside steel pipe |
| CN207079815U (en) * | 2017-06-08 | 2018-03-09 | 南京林业大学 | A kind of FRP steel clamps heart pipe |
| CN108086594A (en) * | 2018-01-19 | 2018-05-29 | 广西大学 | A kind of fiber composite steel open web type angle steel marine aggregate concrete square column and preparation method thereof |
| US20180305929A1 (en) * | 2016-04-29 | 2018-10-25 | Southeast University | Steel-fiber composite material concrete combined column, and post-earthquake repair method thereof |
| CN109487956A (en) * | 2018-11-26 | 2019-03-19 | 台州学院 | A kind of PVC-FRP pipe constraint reinforced column and preparation method thereof |
| CN109665789A (en) * | 2019-01-22 | 2019-04-23 | 广西大学 | A kind of glass fibre coral marine sand concrete and preparation method thereof |
| CN109779149A (en) * | 2019-01-15 | 2019-05-21 | 广东工业大学 | A seawater sea sand concrete column |
| CN110714577A (en) * | 2019-11-08 | 2020-01-21 | 南京林业大学 | Steel pipe concrete structure with built-in composite pipe seawater sea sand concrete |
| US20200131768A1 (en) * | 2018-10-29 | 2020-04-30 | Steven T Imrich | Non-Corrosive Micro Rebar |
| CN111635195A (en) * | 2020-06-12 | 2020-09-08 | 朱峣霖 | Seawater sea sand concrete and preparation method thereof |
-
2021
- 2021-06-28 CN CN202110719184.7A patent/CN113374175A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202672489U (en) * | 2012-07-13 | 2013-01-16 | 湖南大学 | Reinforced concrete column restrained by composite bushing |
| CN103015631A (en) * | 2012-12-13 | 2013-04-03 | 广西大学 | Built-in polyvinyl chloride (PVC) pipe enhanced square steel pipe concrete combined column |
| CN104695628A (en) * | 2015-03-17 | 2015-06-10 | 华北水利水电大学 | Novel anti-corrosion fire-resisting column |
| US20180305929A1 (en) * | 2016-04-29 | 2018-10-25 | Southeast University | Steel-fiber composite material concrete combined column, and post-earthquake repair method thereof |
| KR101712378B1 (en) * | 2016-09-07 | 2017-03-06 | 비제이엠텍(주) | Repairing or reinforcing method of concrete structure using alkali recovering rust prevention and inorganic polymer mortar composition |
| CN106836649A (en) * | 2017-03-30 | 2017-06-13 | 韦灼彬 | Coral concrete combining structure post is filled out in fiber cloth outside steel pipe |
| CN207079815U (en) * | 2017-06-08 | 2018-03-09 | 南京林业大学 | A kind of FRP steel clamps heart pipe |
| CN108086594A (en) * | 2018-01-19 | 2018-05-29 | 广西大学 | A kind of fiber composite steel open web type angle steel marine aggregate concrete square column and preparation method thereof |
| US20200131768A1 (en) * | 2018-10-29 | 2020-04-30 | Steven T Imrich | Non-Corrosive Micro Rebar |
| CN109487956A (en) * | 2018-11-26 | 2019-03-19 | 台州学院 | A kind of PVC-FRP pipe constraint reinforced column and preparation method thereof |
| CN109779149A (en) * | 2019-01-15 | 2019-05-21 | 广东工业大学 | A seawater sea sand concrete column |
| CN109665789A (en) * | 2019-01-22 | 2019-04-23 | 广西大学 | A kind of glass fibre coral marine sand concrete and preparation method thereof |
| CN110714577A (en) * | 2019-11-08 | 2020-01-21 | 南京林业大学 | Steel pipe concrete structure with built-in composite pipe seawater sea sand concrete |
| CN111635195A (en) * | 2020-06-12 | 2020-09-08 | 朱峣霖 | Seawater sea sand concrete and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837297A (en) * | 2022-05-31 | 2022-08-02 | 福州大学 | Novel ocean engineering structure and construction method thereof |
| CN114837297B (en) * | 2022-05-31 | 2023-01-03 | 福州大学 | Ocean engineering structure and construction method thereof |
| CN115467470A (en) * | 2022-09-29 | 2022-12-13 | 中国二十二冶集团有限公司 | Method for improving tensile property of round CFRP-concrete filled steel tube |
| CN115467470B (en) * | 2022-09-29 | 2023-11-03 | 中国二十二冶集团有限公司 | Method for improving tensile property of round CFRP-steel tube concrete |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110318495B (en) | Assembled permanent template superposed FRP rib seawater sea sand recycled concrete beam and manufacturing method thereof | |
| Wang et al. | Axial compressive behavior of seawater sea-sand coral aggregate concrete-filled circular FRP-steel composite tube columns | |
| CN202117165U (en) | Fiber composite material cylinder restrained steel pipe concrete composite structure | |
| CN106760207B (en) | A kind of preparation method of TRC template reinforced column | |
| CN101255717B (en) | Construction technique for building block and wall board | |
| CN111851400A (en) | Confined concrete column based on sea sand and seawater TRC prefabricated shell and preparation method | |
| CN112695953A (en) | Fiber reinforced material and ultra-high performance concrete pipe filled common concrete combined column and production method thereof | |
| CN103967205A (en) | FRP (Fiber Reinforced Polymer) pipe-recycled concrete-steel pipe double-walled hollow combined member | |
| CN106760216A (en) | A kind of bamboo wood multiple tube constrains steel reinforced concrete combining structure | |
| CN113374175A (en) | Corrosion-resistant CFRP-high-strength steel composite pipe sea aggregate seawater concrete combined column | |
| CN101328751A (en) | A fiber composite steel reinforced concrete structure | |
| CN207079815U (en) | A kind of FRP steel clamps heart pipe | |
| CN108894432A (en) | A kind of very-high performance steel fiber concrete pipe constraint regeneration monolith column | |
| CN101824863B (en) | Concrete shear wall | |
| CN106592869A (en) | Bamboo composite pipe-steel pipe internal-external constraint concrete composite structure | |
| CN106677551A (en) | Method for compositely strengthening steel pipe column through external sleeveing of circular steel pipe concrete fibre composite materials | |
| CN105507497A (en) | Concrete pouring composite column with bamboo winding pipe for construction and preparation method thereof | |
| CN112456930B (en) | Concrete material suitable for 3D printing of assembled road panel and printing method | |
| CN207260440U (en) | A kind of FRP pipe seawater sea sand regenerated self-compacting concrete environmental protection building component | |
| CN106812248A (en) | A kind of construction refuse regenerated concrete superposed column and its construction technology | |
| CN110423068A (en) | A kind of superelevation is strong, high pervious concrete building block and preparation method thereof | |
| CN108914734B (en) | High-tensile-strength pervious concrete sandwich structure and preparation method thereof | |
| CN114055597A (en) | Fiber woven mesh reinforced ECC sandwich heat-insulation composite wallboard and manufacturing method thereof | |
| CN211114427U (en) | Natural fiber composite pipe restraint recycled concrete post | |
| CN102433957B (en) | Novel composite partition board and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210910 |