CA3050897A1 - Trc folded assemble-type permanent formwork and manufacturing method thereof - Google Patents
Trc folded assemble-type permanent formwork and manufacturing method thereofInfo
- Publication number
- CA3050897A1 CA3050897A1 CA3050897A CA3050897A CA3050897A1 CA 3050897 A1 CA3050897 A1 CA 3050897A1 CA 3050897 A CA3050897 A CA 3050897A CA 3050897 A CA3050897 A CA 3050897A CA 3050897 A1 CA3050897 A1 CA 3050897A1
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- CA
- Canada
- Prior art keywords
- molds
- woven fabric
- folded
- fabric net
- assemble
- 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.)
- Granted
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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
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G9/00—Forming or shuttering elements for general use
- E04G9/08—Forming boards or similar elements, which are collapsible, foldable, or able to be rolled up
- E04G9/083—Forming boards or similar elements, which are collapsible, foldable, or able to be rolled up which are foldable
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The present invention discloses a TRC folded assemble-type permanent formwork and a manufacturing method thereof, and belongs to the technical field of reinforced concrete building construction. The assemble-type permanent formwork comprises a woven fabric net, FRP rib hooks, and a plurality of molds; the plurality of molds are arranged and fixed on the woven fabric net in a spaced manner, the distance between the plurality of the molds is the distance that makes the molds be folded to a right angle with respect to each other, each mold is filled with high-performance fine concrete for reinforcing the woven fabric net, and the woven fabric net is presented as a continuous whole piece without interruption when the modes are assembled into a permanent formwork, which can fully exert the hoop effect; the woven fabric net and the FRP rib hooks work together at the connections, which can ensure strength and durability of the connections; the TRC folded assemble-type permanent formworks can be arbitrarily assembled into beam, board, column formwork as required in construction site, and the bonding property of cast-in-place concrete and the formworks can be improved by the grooves in the inner surfaces of the formworks. The formwork can be folded in storage, is flexible and versatile, simple to manufacture and convenient to use, and can be manipulated easily.
Description
Description TRC Folded Assemble-Type Permanent Formwork and Manufacturing Method Thereof I. Technical Field The present invention relates to a permanent formwork and a manufacturing method thereof, particularly to a novel TRC folded assemble-type permanent formwork applicable to industrial and civil building structures, hydraulic structures, and marine structures, etc., and a manufacturing method thereof, and belongs to the technical field of reinforced concrete building construction.
II. Background Art In the domestic construction field, most of the currently used formworks are wood formworks, steel formworks, etc., which cannot be reused repeatedly, resulting in severe resource consumption. In addition, those formworks have drawbacks including inconvenience in disassembling and reassembling, high turnover expense, and high labor and time consumption, etc.
Besides, after the formworks are removed, the ordinary concrete surfaces in the building structures are exposed naturally and have poor durability.
As the fiber material technology is continuously innovated and developed, a new TRC permanent formwork has appeared. TRC (Textile Reinforced Concrete) is a new high-performance cement-based composite material, which is made of multiple axial woven fabric nets and high-performance fine concrete, and has advantages including high strength, high corrosion resistance, and high plasticity, etc.
TRC permanent formworks have excellent development prospects. On one hand, the formworks are light in weight and convenient for construction, can bond with cast-in-place concrete into a solid integral structure after construction, attain a theoretical "hoop effect" and improve the mechanical properties of the structural members; on the other hand, the high-performance fine concrete used in the formwork works with the woven fabric net to serve as a part of the structural member to bear load after concrete placement and forming, and thereby can improve the durability of the structure and control crack development, reduce subsequent maintenance cost of the structure, and finally prolong the service life of the structure.
The TRC permanent formworks applied in actual projects presently still have the following drawbacks:
the connection problem of assembling the permanent formwork, strength loss still exists at the connection parts; the bonding strength between the permanent formwork and the cast-in-place concrete still needs to be further improved, and abnormal phenomena such as peeling and hollowing may occur; the formwork assembling forms are too simple and limited, cannot be changed flexibly according to the actual engineering demand.
III. Contents of the Invention Technical problem: the purpose of the present invention is to overcome the drawbacks in the prior art and to provide a TRC folded assemble-type permanent formwork that is simple in structure, can be = =
disassembled and reassembled repeatedly, is flexible to use, and can be manipulated easily, and a method for manufacturing the TRC folded assemble-type permanent formwork.
Technical scheme: the TRC folded assemble-type permanent formwork in the present invention comprises a woven fabric net, FRP rib hooks, and a plurality of molds; the plurality of molds are arranged and fixed on the woven fabric net in a spaced manner, the spaced distance between the plurality of the molds is the distance that makes the molds be folded to a right angle with respect to each other, each mold is filled with high-performance fine concrete for reinforcing the woven fabric net, the two ends of the FRP rib hooks are symmetrically fixed to top end, bottom end, and middle part of the molds respectively, and the hooking connections increase the strength of the woven fabric net when the molds are folded to a right angle, and thereby the integrity of the folded assemble-type permanent formwork is enhanced, and breakage at the assembly is avoided.
The molds are formed by fastening an inner board and an outer board, and a plurality of vertical strip ribs are arranged on the inner board.
The inner board and the outer board are made of a PVC plastic board or fiber board.
The method for manufacturing the above-mentioned TRC folded assemble-type permanent formwork comprises the following steps:
a. manufacturing a plurality of molds according to the size of injection molds, cutting a woven fabric net in corresponding height according to the height of the molds, determining the length of the woven fabric net according to the width and the spacing between the plurality of molds, arranging outer boards of the plurality of molds at spacing, attaching the cut woven fabric net to the outer boards arranged at spacing, and then applying configured epoxy resin liquid uniformly on the woven fabric net attached to the molds with a brush with care to avoid agglomeration of the epoxy resin or missing coating on the fiber bundles in the entire process;
b. performing sand blasting with silica sand before the epoxy resin liquid cures, to increase the bonding strength between the woven fabric net and the high-performance fine concrete;
d. hanging the woven fabric net in a ventilated and cool indoor space for drying after the sand blasting, and then mounting the dried woven fabric net in middle position of the molds;
e. erecting the molds, pouring the high-performance fine concrete into the molds, flapping the surfaces of the molds with hands or vibrating the molds slightly repeated for several times when the level of the concrete reaches 1/4 of the height of the molds to expel air bubbles from the matrix in the mold so as to improve the compactness of the high-performance fine concrete, and the woven fabric net between adjacent molds is not poured;
f. curing the concrete in a humid environment after pouring is completed;
performing mold stripping only when the TRC folded assemble-type permanent formwork attains enough strength after the curing is completed, in order to avoid damage to the TRC folded assemble-type permanent formwork when performing mold stripping.
When pouring the high-performance fine concrete into the molds, in order to avoid displacement of the woven fabric net under the impact of the high-performance fine concrete in the process of pouring, = 2 =
a thin plate is placed between the molds and the woven fabric net is attached to the thin plate, and then the thin plate is removed gradually in the pouring process.
When assembling a beam formwork, the molds are three, and the woven fabric net for lapping is not kept on two outer boards; when assembling a column formwork, the molds are four, and the woven fabric net for lapping is kept on two outer boards (3).
The manufacturing process of the epoxy resin liquid is as follows: in order to avoid direct sunlight and wind blowing, the entire stirring process is performed in a closed indoor environment, epoxy resin, a curing agent, and a diluting agent are mixed at 1:1:0.5 mix ratio, and stirred until well mixed.
Benefits: with the technical scheme described above, the TRC folded assemble-type permanent formwork in the present invention supports folding and assembling the TRC
permanent formworks one by one. Compared with the prior art, the TRC folded assemble-type permanent formwork provided in the present invention has the following advantages:
(1) The woven fabric net is presented as a continuous whole piece without interruption when the TRC folded assemble-type permanent formworks are assembled into a permanent formwork, which can fully exert the hoop effect;
II. Background Art In the domestic construction field, most of the currently used formworks are wood formworks, steel formworks, etc., which cannot be reused repeatedly, resulting in severe resource consumption. In addition, those formworks have drawbacks including inconvenience in disassembling and reassembling, high turnover expense, and high labor and time consumption, etc.
Besides, after the formworks are removed, the ordinary concrete surfaces in the building structures are exposed naturally and have poor durability.
As the fiber material technology is continuously innovated and developed, a new TRC permanent formwork has appeared. TRC (Textile Reinforced Concrete) is a new high-performance cement-based composite material, which is made of multiple axial woven fabric nets and high-performance fine concrete, and has advantages including high strength, high corrosion resistance, and high plasticity, etc.
TRC permanent formworks have excellent development prospects. On one hand, the formworks are light in weight and convenient for construction, can bond with cast-in-place concrete into a solid integral structure after construction, attain a theoretical "hoop effect" and improve the mechanical properties of the structural members; on the other hand, the high-performance fine concrete used in the formwork works with the woven fabric net to serve as a part of the structural member to bear load after concrete placement and forming, and thereby can improve the durability of the structure and control crack development, reduce subsequent maintenance cost of the structure, and finally prolong the service life of the structure.
The TRC permanent formworks applied in actual projects presently still have the following drawbacks:
the connection problem of assembling the permanent formwork, strength loss still exists at the connection parts; the bonding strength between the permanent formwork and the cast-in-place concrete still needs to be further improved, and abnormal phenomena such as peeling and hollowing may occur; the formwork assembling forms are too simple and limited, cannot be changed flexibly according to the actual engineering demand.
III. Contents of the Invention Technical problem: the purpose of the present invention is to overcome the drawbacks in the prior art and to provide a TRC folded assemble-type permanent formwork that is simple in structure, can be = =
disassembled and reassembled repeatedly, is flexible to use, and can be manipulated easily, and a method for manufacturing the TRC folded assemble-type permanent formwork.
Technical scheme: the TRC folded assemble-type permanent formwork in the present invention comprises a woven fabric net, FRP rib hooks, and a plurality of molds; the plurality of molds are arranged and fixed on the woven fabric net in a spaced manner, the spaced distance between the plurality of the molds is the distance that makes the molds be folded to a right angle with respect to each other, each mold is filled with high-performance fine concrete for reinforcing the woven fabric net, the two ends of the FRP rib hooks are symmetrically fixed to top end, bottom end, and middle part of the molds respectively, and the hooking connections increase the strength of the woven fabric net when the molds are folded to a right angle, and thereby the integrity of the folded assemble-type permanent formwork is enhanced, and breakage at the assembly is avoided.
The molds are formed by fastening an inner board and an outer board, and a plurality of vertical strip ribs are arranged on the inner board.
The inner board and the outer board are made of a PVC plastic board or fiber board.
The method for manufacturing the above-mentioned TRC folded assemble-type permanent formwork comprises the following steps:
a. manufacturing a plurality of molds according to the size of injection molds, cutting a woven fabric net in corresponding height according to the height of the molds, determining the length of the woven fabric net according to the width and the spacing between the plurality of molds, arranging outer boards of the plurality of molds at spacing, attaching the cut woven fabric net to the outer boards arranged at spacing, and then applying configured epoxy resin liquid uniformly on the woven fabric net attached to the molds with a brush with care to avoid agglomeration of the epoxy resin or missing coating on the fiber bundles in the entire process;
b. performing sand blasting with silica sand before the epoxy resin liquid cures, to increase the bonding strength between the woven fabric net and the high-performance fine concrete;
d. hanging the woven fabric net in a ventilated and cool indoor space for drying after the sand blasting, and then mounting the dried woven fabric net in middle position of the molds;
e. erecting the molds, pouring the high-performance fine concrete into the molds, flapping the surfaces of the molds with hands or vibrating the molds slightly repeated for several times when the level of the concrete reaches 1/4 of the height of the molds to expel air bubbles from the matrix in the mold so as to improve the compactness of the high-performance fine concrete, and the woven fabric net between adjacent molds is not poured;
f. curing the concrete in a humid environment after pouring is completed;
performing mold stripping only when the TRC folded assemble-type permanent formwork attains enough strength after the curing is completed, in order to avoid damage to the TRC folded assemble-type permanent formwork when performing mold stripping.
When pouring the high-performance fine concrete into the molds, in order to avoid displacement of the woven fabric net under the impact of the high-performance fine concrete in the process of pouring, = 2 =
a thin plate is placed between the molds and the woven fabric net is attached to the thin plate, and then the thin plate is removed gradually in the pouring process.
When assembling a beam formwork, the molds are three, and the woven fabric net for lapping is not kept on two outer boards; when assembling a column formwork, the molds are four, and the woven fabric net for lapping is kept on two outer boards (3).
The manufacturing process of the epoxy resin liquid is as follows: in order to avoid direct sunlight and wind blowing, the entire stirring process is performed in a closed indoor environment, epoxy resin, a curing agent, and a diluting agent are mixed at 1:1:0.5 mix ratio, and stirred until well mixed.
Benefits: with the technical scheme described above, the TRC folded assemble-type permanent formwork in the present invention supports folding and assembling the TRC
permanent formworks one by one. Compared with the prior art, the TRC folded assemble-type permanent formwork provided in the present invention has the following advantages:
(1) The woven fabric net is presented as a continuous whole piece without interruption when the TRC folded assemble-type permanent formworks are assembled into a permanent formwork, which can fully exert the hoop effect;
(2) The woven fabric net and the FRP rib hooks work together at the connections, which can ensure that strength and durability of the connections are not lower than those of the integral permanent formwork;
(3) The TRC folded assemble-type permanent formworks can be arbitrarily assembled into beam formwork, board formwork and column formwork as required in the construction site, and the bonding property of cast-in-place concrete and the formworks can be improved by the grooves arranged in the inner surfaces of the formworks. The formworks can be designed and produced according to the actual size requirements in a plant, and can be stored in a folded state after being produced; thus, the formworks are more flexible and versatile. During field construction, the folded formworks can be assembled as required into a permanent formwork for beam, board, or column, and the edges may be grouted with non-shrinkage cement for bonding patching.
The formwork employs a novel assembling technique, is simple to manufacture and convenient to use, and can be manipulated easily, can improve the durability and service life of structures, and has wide practicability.
IV. Description of Drawings Fig. 1 shows the schematic diagram of the expanded structure of the TRC folded assemble-type permanent formwork in the present invention;
Fig. 2 is a schematic structural diagram of the FRP rib hook in the present invention;
Fig. 3 is a schematic structural diagram of the inner board of the mold in the present invention;
Fig. 4 is a schematic structural diagram of an example I of a TRC folded assemble-type permanent column formwork in the present invention;
= 3 =
Fig. 5 is a schematic structural diagram of an example II of a TRC folded assemble-type permanent beam formwork in the present invention.
In the figures: 1 - woven fabric net; 2 - FRP rib hook; 3 - mold.
V. Embodiments Hereunder the present invention will be further detailed in embodiments with reference to the accompanying drawings.
As shown in Fig. 1, the TRC folded assemble-type permanent formwork in the present invention mainly comprises a woven fabric net 1, FRP rib hooks 2, and a plurality of molds 3; the plurality of molds 3 are arranged and fixed on the woven fabric net 1 in a spaced manner, the mold 3 is formed by fastening an inner board and an outer board, and the junction is connected by a brad nailer, and a plurality of vertical strip ribs are arranged on the inner board, as shown in Fig. 3. The inner board and the outer board are made of a PVC plastic board or fiber board. The plurality of molds 3 are arranged and fixed in a spaced manner, the distance between the plurality of the molds 3 is the distance that makes the molds be folded to a right angle with respect to each other, each mold is filled with high-performance fine concrete for reinforcing the woven fabric net 1, the FRP
rib hooks 2 are shown in Fig. 2, the two ends of the FRP rib hooks 2 are symmetrically fixed to top end, bottom end, and middle part of the molds respectively, and the formed hooking connections increase the strength of the woven fabric net 1 when the molds 3 are folded to a right angle, and thereby the integrity of the folded assemble-type permanent formwork is enhanced, and breakage at the assemble joints is avoided.
The method for manufacturing the above-mentioned TRC folded assemble-type permanent formwork comprises the following steps:
a. manufacturing a plurality of molds 3 according to the size of injection molds, cutting a woven fabric net 1 in corresponding height according to the height of the molds 3, determining the length of the woven fabric net 1 according to the width and the spacing between the plurality of molds 3, arranging outer boards of the plurality of molds 3 at spacing, attaching the cut woven fabric net to the outer boards arranged at spacing, and then applying configured epoxy resin liquid uniformly on the woven fabric net attached to the molds with a brush with care to avoid agglomeration of the epoxy resin or missing coating on the fiber bundles in the entire process; the manufacturing process of the epoxy resin liquid is as follows: in order to avoid direct sunlight and wind blowing, the entire stirring process is performed in a closed indoor environment, epoxy resin, a curing agent, and a diluting agent are mixed at 1:1:0.5 mix ratio, and stirred until well mixed.
b. performing sand blasting with silica sand before the epoxy resin liquid cures, to increase the bonding strength between the woven fabric net and the high-performance fine concrete;
d. hanging the woven fabric net in a ventilated and cool indoor space for drying after the sand blasting, and then mounting the dried woven fabric net in middle position of the molds 3, symmetrically fixing the two ends of the FRP rib hook 2 to the top end, bottom end, and middle part of the molds respectively, and hooking the FRP rib hooks together in the assembling process, so that the FRP rib hook 2 work with the woven fabric net in the assembling process to increase = 4 =
the strength of the connections, improve the integrity of the folded assemble-type permanent formwork, avoid breakage at the joints, and fully exert "hoop effect" of the TRC permanent formwork;
e. erecting the molds 3, pouring the high-performance fine concrete into the molds 3, flapping the surfaces of the molds with hands or vibrating the molds slightly repeated for several times when the level of the concrete reaches 1/4 of the height of the molds to expel air bubbles from the matrix in the mold so as to improve the compactness of the high-performance fine concrete, and the woven fabric net between adjacent molds is not poured; in order to avoid displacement of the woven fabric net under the impact of the high-performance fine concrete in the process of pouring when the high-performance fine concrete is poured into the mold 3, a thin plate is placed between the molds and the woven fabric net is attached to the thin plate, and then the thin plate is removed gradually in the pouring process; lateral supports are provided outside the molds in order to prevent lateral deformation of the molds in the process of pouring the high-performance fine concrete.
f. curing the TRC folded assemble-type permanent formwork in a humid environment after the pouring is completed to a specified age; performing mold stripping only when the TRC folded assemble-type permanent formwork attains enough strength after the curing is completed, in order to avoid damage to the TRC folded assemble-type permanent formwork when performing mold stripping.
The woven fabric net 1 is woven with one kind of fibers or is woven with two different kinds of fibers in warp direction and weft direction respectively, and the fibers are corrosion-resistant fibers with high tensile strength, such as carbon fibers, aramid fibers, alkali-resistant glass fibers, basalt fibers, polyvinyl alcohol fibers, or polyethylene fibers.
The high-performance fine concrete is made by stirring 52.5 silicate cement, grade I coal ash, silica sand with 0-0.6mm particle size, water, Sika third-generation water reducer, and chopped fibers. The preparation method is as follows:
(1) Required materials: 500kg/m3 52.5 silicate cement, 180kg/m3 grade I coal ash, 40kg/m3 silica fume, 800kg/m3 silica sand with 0-0.6mm particle size, 400kg/m3 silica sand in 0.6-1.2mm particle size, 252kg/m3 water, 4.0kg/m3 Sika third-generation water reducer, and chopped fibers accounting for 0.5-2% of the total volume.
(2) Stirring: after the required materials are prepared, the cement, grade I
coal ash, silica fume, and silica sand are stirred in an agitator for 2-3 minutes, then water is added after stirring well, and then the Sika third-generation water reducer is added and the mixture is stirred for 2-3 minutes.
Chopped fibers may be further added and then the mixture is stirred further for 3-5 minutes, in order to enhance the ductility and crack resistance of the matrix and to make cracks develop in a fine and dense form. Finally, the high-performance fine concrete is formed.
The above-mentioned chopped fibers: employ one kind of or more kinds of polyvinyl alcohol fibers with flexibleness and high water absorption, polyethylene fibers with high strength and corrosion resistance, carbon fibers with high tensile properties, alkali-resistant glass fibers with high temperature = 5 =
resistance and acid-alkali corrosion resistance, basalt fibers with high strength and temperature resistance, or polypropylene fibers with high strength and good electrical insulation, etc.
The high-performance fine concrete: ensures that the concrete can infiltrate through the woven fabric net sufficiently, and bond with the woven fabric net well; has self-compaction properties with high fluidity and non-segregation; the corrosion effect on the woven fabric net is within an acceptable range.
The purposes of impregnation with the epoxy resin liquid include: (1) hardening the surface of the woven fabric net, conglomerating the loose individual fiber bundles of the woven fabric net into one piece, and reducing the slippage between fibers in the fiber bundles; (2) improving the bonding strength of the interface between the woven fabric net and the high-performance fine concrete; (3) forming a protective coating on the surface of the woven fabric net to effectively prevent erosion of the alkaline liquid in the concrete to the woven fabric net.
Fig. 4 shows an example I of assemble-type permanent column formwork. To assemble a column formwork, four molds 3 are used, and the woven fabric net for lapping is kept as an overlapping edge on two outer boards 3.
Fig. 5 shows an example II of assemble-type permanent beam formwork. To assemble a beam formwork, three molds 3 are used, and the woven fabric net for lapping is not kept on two outer boards 3.
= 6 =
The formwork employs a novel assembling technique, is simple to manufacture and convenient to use, and can be manipulated easily, can improve the durability and service life of structures, and has wide practicability.
IV. Description of Drawings Fig. 1 shows the schematic diagram of the expanded structure of the TRC folded assemble-type permanent formwork in the present invention;
Fig. 2 is a schematic structural diagram of the FRP rib hook in the present invention;
Fig. 3 is a schematic structural diagram of the inner board of the mold in the present invention;
Fig. 4 is a schematic structural diagram of an example I of a TRC folded assemble-type permanent column formwork in the present invention;
= 3 =
Fig. 5 is a schematic structural diagram of an example II of a TRC folded assemble-type permanent beam formwork in the present invention.
In the figures: 1 - woven fabric net; 2 - FRP rib hook; 3 - mold.
V. Embodiments Hereunder the present invention will be further detailed in embodiments with reference to the accompanying drawings.
As shown in Fig. 1, the TRC folded assemble-type permanent formwork in the present invention mainly comprises a woven fabric net 1, FRP rib hooks 2, and a plurality of molds 3; the plurality of molds 3 are arranged and fixed on the woven fabric net 1 in a spaced manner, the mold 3 is formed by fastening an inner board and an outer board, and the junction is connected by a brad nailer, and a plurality of vertical strip ribs are arranged on the inner board, as shown in Fig. 3. The inner board and the outer board are made of a PVC plastic board or fiber board. The plurality of molds 3 are arranged and fixed in a spaced manner, the distance between the plurality of the molds 3 is the distance that makes the molds be folded to a right angle with respect to each other, each mold is filled with high-performance fine concrete for reinforcing the woven fabric net 1, the FRP
rib hooks 2 are shown in Fig. 2, the two ends of the FRP rib hooks 2 are symmetrically fixed to top end, bottom end, and middle part of the molds respectively, and the formed hooking connections increase the strength of the woven fabric net 1 when the molds 3 are folded to a right angle, and thereby the integrity of the folded assemble-type permanent formwork is enhanced, and breakage at the assemble joints is avoided.
The method for manufacturing the above-mentioned TRC folded assemble-type permanent formwork comprises the following steps:
a. manufacturing a plurality of molds 3 according to the size of injection molds, cutting a woven fabric net 1 in corresponding height according to the height of the molds 3, determining the length of the woven fabric net 1 according to the width and the spacing between the plurality of molds 3, arranging outer boards of the plurality of molds 3 at spacing, attaching the cut woven fabric net to the outer boards arranged at spacing, and then applying configured epoxy resin liquid uniformly on the woven fabric net attached to the molds with a brush with care to avoid agglomeration of the epoxy resin or missing coating on the fiber bundles in the entire process; the manufacturing process of the epoxy resin liquid is as follows: in order to avoid direct sunlight and wind blowing, the entire stirring process is performed in a closed indoor environment, epoxy resin, a curing agent, and a diluting agent are mixed at 1:1:0.5 mix ratio, and stirred until well mixed.
b. performing sand blasting with silica sand before the epoxy resin liquid cures, to increase the bonding strength between the woven fabric net and the high-performance fine concrete;
d. hanging the woven fabric net in a ventilated and cool indoor space for drying after the sand blasting, and then mounting the dried woven fabric net in middle position of the molds 3, symmetrically fixing the two ends of the FRP rib hook 2 to the top end, bottom end, and middle part of the molds respectively, and hooking the FRP rib hooks together in the assembling process, so that the FRP rib hook 2 work with the woven fabric net in the assembling process to increase = 4 =
the strength of the connections, improve the integrity of the folded assemble-type permanent formwork, avoid breakage at the joints, and fully exert "hoop effect" of the TRC permanent formwork;
e. erecting the molds 3, pouring the high-performance fine concrete into the molds 3, flapping the surfaces of the molds with hands or vibrating the molds slightly repeated for several times when the level of the concrete reaches 1/4 of the height of the molds to expel air bubbles from the matrix in the mold so as to improve the compactness of the high-performance fine concrete, and the woven fabric net between adjacent molds is not poured; in order to avoid displacement of the woven fabric net under the impact of the high-performance fine concrete in the process of pouring when the high-performance fine concrete is poured into the mold 3, a thin plate is placed between the molds and the woven fabric net is attached to the thin plate, and then the thin plate is removed gradually in the pouring process; lateral supports are provided outside the molds in order to prevent lateral deformation of the molds in the process of pouring the high-performance fine concrete.
f. curing the TRC folded assemble-type permanent formwork in a humid environment after the pouring is completed to a specified age; performing mold stripping only when the TRC folded assemble-type permanent formwork attains enough strength after the curing is completed, in order to avoid damage to the TRC folded assemble-type permanent formwork when performing mold stripping.
The woven fabric net 1 is woven with one kind of fibers or is woven with two different kinds of fibers in warp direction and weft direction respectively, and the fibers are corrosion-resistant fibers with high tensile strength, such as carbon fibers, aramid fibers, alkali-resistant glass fibers, basalt fibers, polyvinyl alcohol fibers, or polyethylene fibers.
The high-performance fine concrete is made by stirring 52.5 silicate cement, grade I coal ash, silica sand with 0-0.6mm particle size, water, Sika third-generation water reducer, and chopped fibers. The preparation method is as follows:
(1) Required materials: 500kg/m3 52.5 silicate cement, 180kg/m3 grade I coal ash, 40kg/m3 silica fume, 800kg/m3 silica sand with 0-0.6mm particle size, 400kg/m3 silica sand in 0.6-1.2mm particle size, 252kg/m3 water, 4.0kg/m3 Sika third-generation water reducer, and chopped fibers accounting for 0.5-2% of the total volume.
(2) Stirring: after the required materials are prepared, the cement, grade I
coal ash, silica fume, and silica sand are stirred in an agitator for 2-3 minutes, then water is added after stirring well, and then the Sika third-generation water reducer is added and the mixture is stirred for 2-3 minutes.
Chopped fibers may be further added and then the mixture is stirred further for 3-5 minutes, in order to enhance the ductility and crack resistance of the matrix and to make cracks develop in a fine and dense form. Finally, the high-performance fine concrete is formed.
The above-mentioned chopped fibers: employ one kind of or more kinds of polyvinyl alcohol fibers with flexibleness and high water absorption, polyethylene fibers with high strength and corrosion resistance, carbon fibers with high tensile properties, alkali-resistant glass fibers with high temperature = 5 =
resistance and acid-alkali corrosion resistance, basalt fibers with high strength and temperature resistance, or polypropylene fibers with high strength and good electrical insulation, etc.
The high-performance fine concrete: ensures that the concrete can infiltrate through the woven fabric net sufficiently, and bond with the woven fabric net well; has self-compaction properties with high fluidity and non-segregation; the corrosion effect on the woven fabric net is within an acceptable range.
The purposes of impregnation with the epoxy resin liquid include: (1) hardening the surface of the woven fabric net, conglomerating the loose individual fiber bundles of the woven fabric net into one piece, and reducing the slippage between fibers in the fiber bundles; (2) improving the bonding strength of the interface between the woven fabric net and the high-performance fine concrete; (3) forming a protective coating on the surface of the woven fabric net to effectively prevent erosion of the alkaline liquid in the concrete to the woven fabric net.
Fig. 4 shows an example I of assemble-type permanent column formwork. To assemble a column formwork, four molds 3 are used, and the woven fabric net for lapping is kept as an overlapping edge on two outer boards 3.
Fig. 5 shows an example II of assemble-type permanent beam formwork. To assemble a beam formwork, three molds 3 are used, and the woven fabric net for lapping is not kept on two outer boards 3.
= 6 =
Claims (7)
1. A TRC folded assemble-type permanent formwork, characterized in that, comprising a woven fabric net (1), FRP rib hooks (2), and a plurality of molds (3); the plurality of molds (3) are arranged and fixed on the woven fabric net (1) in a spaced manner, the distance between the plurality of the molds (3) is the distance that makes the molds (3) be folded to a right angle with respect to each other, each mold is filled with high-performance fine concrete for reinforcing the woven fabric net (1), the two ends of the FRP rib hooks (2) are symmetrically fixed to top end, bottom end, and middle part of the molds respectively, and the hooking connections increase the strength of the woven fabric net (1) when the molds (3) are folded to a right angle, and thereby the integrity of the folded assemble-type permanent formwork is enhanced, and breakage at the assembly is avoided.
2. The TRC folded assemble-type permanent formwork according to claim 1, characterized in that, the molds (3) are formed by fastening an inner board and an outer board, and a plurality of vertical strip ribs are arranged on the inner board.
3. The TRC folded assemble-type permanent formwork according to claim 1, characterized in that, the inner board and the outer board are made of a PVC plastic board or fiber board.
4. A method for manufacturing the TRC folded assemble-type permanent formwork according to the claim 1, characterized in that comprising the following steps:
a. manufacturing a plurality of molds (3) according to the size of injection molds, cutting a woven fabric net (1) in corresponding height according to the height of the molds (3), determining the length of the woven fabric net (1) according to the width and the spacing between the plurality of molds (3), arranging outer boards of the plurality of molds (3) at spacing, attaching the cut woven fabric net to the outer boards arranged at spacing, and then applying configured epoxy resin liquid uniformly on the woven fabric net attached to the molds with a brush with care to avoid agglomeration of the epoxy resin or missing coating on the fiber bundles in the entire process;
b. performing sand blasting with silica sand before the epoxy resin liquid cures, to increase the bonding strength between the woven fabric net and the high-performance fine concrete;
d. hanging the woven fabric net in a ventilated and cool indoor space for drying after the sand blasting, and then mounting the dried woven fabric net in middle position of the molds (3);
e. erecting the molds (3), pouring the high-performance fine concrete into the molds (3), flapping the surfaces of the molds with hands or vibrating the molds slightly repeated for several times when the level of the concrete reaches 1/4 of the height of the molds to expel air bubbles from the matrix in the mold so as to improve the compactness of the high-performance fine concrete, and the woven fabric net between adjacent molds is not poured;
f. curing the concrete in a humid environment after pouring is completed;
performing mold stripping only when the TRC folded assemble-type permanent formwork attains enough strength after the curing is completed, in order to avoid damage to the TRC
folded assemble-type permanent formwork when performing mold stripping.
a. manufacturing a plurality of molds (3) according to the size of injection molds, cutting a woven fabric net (1) in corresponding height according to the height of the molds (3), determining the length of the woven fabric net (1) according to the width and the spacing between the plurality of molds (3), arranging outer boards of the plurality of molds (3) at spacing, attaching the cut woven fabric net to the outer boards arranged at spacing, and then applying configured epoxy resin liquid uniformly on the woven fabric net attached to the molds with a brush with care to avoid agglomeration of the epoxy resin or missing coating on the fiber bundles in the entire process;
b. performing sand blasting with silica sand before the epoxy resin liquid cures, to increase the bonding strength between the woven fabric net and the high-performance fine concrete;
d. hanging the woven fabric net in a ventilated and cool indoor space for drying after the sand blasting, and then mounting the dried woven fabric net in middle position of the molds (3);
e. erecting the molds (3), pouring the high-performance fine concrete into the molds (3), flapping the surfaces of the molds with hands or vibrating the molds slightly repeated for several times when the level of the concrete reaches 1/4 of the height of the molds to expel air bubbles from the matrix in the mold so as to improve the compactness of the high-performance fine concrete, and the woven fabric net between adjacent molds is not poured;
f. curing the concrete in a humid environment after pouring is completed;
performing mold stripping only when the TRC folded assemble-type permanent formwork attains enough strength after the curing is completed, in order to avoid damage to the TRC
folded assemble-type permanent formwork when performing mold stripping.
5. The method for manufacturing the TRC folded assemble-type permanent formwork according to claim 4, characterized in that, when pouring the high-performance fine concrete into the molds (3), in order to avoid displacement of the woven fabric net under the impact of the high-performance fine concrete in the process of pouring, a thin plate is placed between the molds and the woven fabric net is attached to the thin plate, and then the thin plate is removed gradually in the pouring process.
6. The method for manufacturing the TRC folded assemble-type permanent formwork according to claim 4, characterized in that, to assemble a beam formwork, the molds (3) are three, and the woven fabric net for lapping is not kept on two outer boards (3); to assemble a column formwork, the molds (3) are four, and the woven fabric net for lapping is kept on two outer boards (3).
7. The method for manufacturing the TRC folded assemble-type permanent formwork according to claim 4, characterized in that, the manufacturing process of the epoxy resin liquid is as follows:
in order to avoid direct sunlight and wind blowing, the entire stirring process is performed in a closed indoor environment, epoxy resin, a curing agent, and a diluting agent are mixed at 1:1:0.5 mix ratio, and stirred until well mixed.
in order to avoid direct sunlight and wind blowing, the entire stirring process is performed in a closed indoor environment, epoxy resin, a curing agent, and a diluting agent are mixed at 1:1:0.5 mix ratio, and stirred until well mixed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810427319.0 | 2018-05-07 | ||
| CN201810427319.0A CN108590164B (en) | 2018-05-07 | 2018-05-07 | A kind of TRC is collapsible can assembled permanent formwork and preparation method thereof |
| PCT/CN2018/109266 WO2019214155A1 (en) | 2018-05-07 | 2018-10-08 | Trc foldable permanent formwork capable of being assembled and method for manufacturing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3050897A1 true CA3050897A1 (en) | 2019-11-07 |
| CA3050897C CA3050897C (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA3050897A Active CA3050897C (en) | 2018-05-07 | 2018-10-08 | Trc folded assemble-type permanent formwork and manufacturing method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN108590164B (en) |
| AU (1) | AU2018408668B2 (en) |
| CA (1) | CA3050897C (en) |
| RU (1) | RU2736929C1 (en) |
| WO (1) | WO2019214155A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108590164B (en) * | 2018-05-07 | 2019-10-15 | 中国矿业大学 | A kind of TRC is collapsible can assembled permanent formwork and preparation method thereof |
| CN110193879B (en) * | 2019-07-04 | 2020-08-14 | 山东省建筑科学研究院 | Die for preparing permanent beam template and permanent beam template preparation method |
| CN114311871B (en) * | 2022-01-18 | 2023-02-28 | 天津大学 | Foldable FRP plate and manufacturing method thereof |
| CN114319190B (en) * | 2022-01-20 | 2023-04-18 | 同济大学 | Prevent disappearing and prevent passageway parking folding device |
| CN114575500B (en) * | 2022-03-10 | 2023-02-03 | 中国矿业大学 | Sandwich heat-insulation wall based on TRC permanent template and manufacturing method thereof |
| CN114939924A (en) * | 2022-05-27 | 2022-08-26 | 哈尔滨工业大学（深圳） | Fiber reinforced composite material column permanent template sectional prefabricated mold and preparation method thereof |
| CN115179392B (en) * | 2022-06-20 | 2023-09-05 | 河南兴业环保科技有限公司 | Concrete production equipment based on machine-made sand |
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| JPS646462A (en) * | 1987-06-29 | 1989-01-11 | Oyo Kikaku Kk | Concrete retaining mold |
| JP2527678Y2 (en) * | 1991-02-18 | 1997-03-05 | 株式会社大林組 | Foldable precast concrete formwork |
| JP3121152B2 (en) * | 1992-10-13 | 2000-12-25 | 株式会社クラレ | Buried connecting member |
| SE503830C2 (en) * | 1995-01-17 | 1996-09-16 | Kroken I Mo Ab | Form and subject |
| US20050066592A1 (en) * | 2003-09-26 | 2005-03-31 | Huber Donald G. | Forming apparatus and method for constructing concrete columns |
| WO2005083199A1 (en) * | 2004-02-24 | 2005-09-09 | Sanchez Renasco Jesus | Formwork for prismatic columns |
| RU76942U1 (en) * | 2006-11-03 | 2008-10-10 | Государственное образовательное учреждение высшего профессионального образования "Курский государственный технический университет" | FORMWORK |
| WO2008128683A1 (en) * | 2007-04-19 | 2008-10-30 | Sven Obernolte | Formwork element |
| NO333023B1 (en) * | 2010-03-03 | 2013-02-18 | Reforcetech Ltd | Reinforcement system and method for building concrete structures. |
| US9091062B2 (en) * | 2010-10-07 | 2015-07-28 | Airlite Plastics Co. | Hinged corner form for an insulating concrete form system |
| FR2990714B1 (en) * | 2012-05-16 | 2014-05-02 | Nidatec | BOX FOR GUIDING A CONCRETE CASTING, REALIZED IN ALVEOLAR MATERIAL, AND BOX ASSEMBLY FOR CONCRETE CONSTRUCTION |
| CN102806592B (en) * | 2012-07-17 | 2014-06-11 | 河北工业大学 | Manufacturing method for demolition-free textile fiber web reinforced concrete formwork |
| CN102777027B (en) * | 2012-08-17 | 2015-10-21 | 浙江大学 | A kind of mutual buckle type can assembled anti-cracking and seepage control permanent beam template |
| CN206070877U (en) * | 2016-07-29 | 2017-04-05 | 华南理工大学 | A kind of ultra-high performance concrete permanent template of cylinder |
| CN106401065A (en) * | 2016-09-06 | 2017-02-15 | 江苏科技大学 | Manufacturing method for textile reinforced concrete composite beam |
| CN106760207B (en) * | 2016-12-16 | 2018-12-18 | 中国矿业大学 | A kind of preparation method of TRC template reinforced column |
| CN107013229A (en) * | 2017-05-26 | 2017-08-04 | 新疆大学 | Folding telescopic gob side entry retaining roadside packing Flexible formwork assembly and its construction method |
| CN107675812B (en) * | 2017-09-23 | 2019-02-22 | 福州大学 | Ultra-high performance concrete plate seam connection structure and its construction method |
| CN108590164B (en) * | 2018-05-07 | 2019-10-15 | 中国矿业大学 | A kind of TRC is collapsible can assembled permanent formwork and preparation method thereof |
-
2018
- 2018-05-07 CN CN201810427319.0A patent/CN108590164B/en active Active
- 2018-10-08 AU AU2018408668A patent/AU2018408668B2/en active Active
- 2018-10-08 CA CA3050897A patent/CA3050897C/en active Active
- 2018-10-08 RU RU2019131522A patent/RU2736929C1/en active
- 2018-10-08 WO PCT/CN2018/109266 patent/WO2019214155A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN108590164A (en) | 2018-09-28 |
| AU2018408668A1 (en) | 2019-11-21 |
| CN108590164B (en) | 2019-10-15 |
| RU2736929C1 (en) | 2020-11-23 |
| AU2018408668B2 (en) | 2020-08-13 |
| WO2019214155A1 (en) | 2019-11-14 |
| CA3050897C (en) | 2021-06-22 |
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