CN109057395A - FRP- for penstock prestressed reinforcement expands ECC multiple tube and its construction technology - Google Patents
FRP- for penstock prestressed reinforcement expands ECC multiple tube and its construction technology Download PDFInfo
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- CN109057395A CN109057395A CN201811127451.6A CN201811127451A CN109057395A CN 109057395 A CN109057395 A CN 109057395A CN 201811127451 A CN201811127451 A CN 201811127451A CN 109057395 A CN109057395 A CN 109057395A
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- 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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/10—Ducts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a kind of FRP- for penstock prestressed reinforcement to expand ECC multiple tube and its construction technology, and the outer surface of defect steel pipe is arranged in, comprising: ECC layers of expansion is wrapped in the outer surface of defect steel pipe；Scrim cloth is wrapped in the outer surface of ECC layers of expansion；Steel ring I with conical outer surface is respectively sleeved at the both ends of defect steel pipe and between scrim cloth and defect steel pipe；The terminal interior surface of scrim cloth is set on steel ring I；Steel ring II is set in the end outer surface of the scrim cloth and corresponding with the position of steel ring I, scrim cloth is fixed between steel ring I and steel ring II；Wherein, it is provided with axial top preformed hole positioned at the upper end of the steel ring I of defect steel pipe one end, axial lower part preformed hole is provided with positioned at the lower end of the steel ring I of the defect steel pipe other end.The present invention solves defect steel pipe in use since corrosion causes defect, and the problem of need repairing and reinforcement when practical application.
Description
Technical field
The invention belongs to civil engineering FRP fiber cloth fields, are used for penstock prestressed reinforcement more particularly to one kind
FRP- expansion ECC multiple tube and its construction technology.
Background technique
There is fibre reinforced composites (FRP) high tensile strength, light, corrosion-resistant, thermal expansion coefficient and concrete to connect
The advantages that close, since the advent of the world have obtained extensive approval and application in field of civil engineering, and are increasingly becoming grinding for the field
Study carefully hot spot.Fiber cloth has intensity high, and density is small, and thickness is thin, does not increase strenthening member self weight and sectional dimension, carbon fiber substantially
Cloth is used for tension, shearing resistance and the seismic hardening of structural elements, which is used in conjunction with compound as carbon fiber with mating dipping glue
Material may make up the carbon cloth sheet material enhancing system of complete performance brilliance.Due to containing water air and titanium dioxide in air
Carbon is contacted with iron can generate chemical reaction, and contain carbon, the carbon dioxide of carbon and iron in water and air in common iron
Solution on the surface of iron form numerous primary battery, the corrosion of steel pipe is accelerated, if steel pipe is embedded in underground, the change in soil
The corrosion of steel pipe can also be accelerated by learning element, therefore steel pipe will inevitably encounter the problem of corrosion needs reinforcement in use.
The restorative procedure traditional for steel pipe be such as: welding, replacement can bring very big influence to the normal use of pipeline.Therefore steel pipe exists
There are bottleneck when being reinforced due to corrosion, a kind of device for repairing and reinforcement steel pipe is needed further to play steel pipe
Value.Developing safe, economic, practical repairing and reinforcement system is to study the precondition of steel pipe reinforcement and repair, is by steel
Pipe reinforce prestressed anchor introduce to the market, one of the key for being applied to practical structures.
Summary of the invention
It is excellent it is an object of the invention to solve at least the above problems and/or defect, and provide at least to will be described later
Point.
In order to realize these purposes and other advantages according to the present invention, provides one kind and add for penstock prestressing force
Solid FRP- expand ECC multiple tube, the outer surface of defect steel pipe is set, comprising:
ECC layers of expansion, is wrapped in the outer surface of defect steel pipe；
Scrim cloth is wrapped in the outer surface of ECC layers of expansion；
Steel ring I with conical outer surface is respectively sleeved at the both ends of defect steel pipe and is located at scrim cloth and defect
Between steel pipe；The terminal interior surface of scrim cloth is set on steel ring I；
Steel ring II is set in the end outer surface of the scrim cloth and corresponding with the position of steel ring I, will be fine
Dimension layer of cloth is fixed between steel ring I and steel ring II；
Wherein, it is provided with axial top preformed hole positioned at the upper end of the steel ring I of defect steel pipe one end, is located at defect steel pipe
The lower end of the steel ring I of the other end is provided with axial lower part preformed hole.
Preferably, the scrim cloth be two-way carbon fibre cloth layer, aramid fiber layer of cloth, high strength glass fiber sheet layer,
Any one in basalt fibre layer of cloth.
Preferably, the scrim cloth is multi-layer fiber cloth, and the multi-layer fiber cloth is fiber cloth by repeatedly winding
It is formed；Epoxide-resin glue is coated between each layer fiber cloth of the multi-layer fiber cloth, and fiber cloth is impregnated with completely.
Preferably, the two-way carbon cloth with a thickness of 0.12~0.15mm.
Preferably, the steel ring I passes through clamp connection group by two semicircle steel rings I with half-cone outer surface
At；The steel ring II is made up of two semicircle steel rings II clamp connection.
Preferably, the end of the tapered surface of the steel ring I with conical outer surface is provided with axial multiple branch pipes.
The present invention also provides a kind of constructions of above-mentioned FRP- expansion ECC multiple tube for penstock prestressed reinforcement
Technique, comprising the following steps:
Step 1: the surface of defect steel pipe is polished smooth, wiped with alcohol, then by polystyrene foam treasure
Pearl cotton glue special is sticked to defect steel tube surface；
Step 2: carrying out the winding of fiber cloth after being fixed to polystyrene foam on polystyrene foam surface, twining
Smear and be impregnated with fiber cloth completely with epoxy resin around process, then be conserved；
Step 3: forming scrim cloth after fiber cloth and epoxy resin solidification；Then the vinegar for being 1:2 with volume ratio
Sour N-butyl and xylene mixture solvent dissolve the polystyrene foam between scrim cloth and defect steel tube surface, and clear
Reason is clean；
Step 4: the steel ring I with conical outer surface is set between scrim cloth and defect steel pipe, and make both ends
The conical outer surface of steel ring I be oppositely arranged, and preformed hole setting in top is arranged through lower part preformed hole at most bottom in top
Portion；
Step 5: steel ring II is set in the end outer surface of the scrim cloth and corresponding with the position of steel ring I,
Scrim cloth to be fixed between steel ring I and steel ring II；
Step 6: injecting expansion ECC from lower part preformed hole, when overflowing until expanding ECC from top preformed hole, stop note
Enter, lower part preformed hole and top are reserved into hole plug, maintenance forms ECC layers of expansion, obtains for penstock prestressed reinforcement
FRP- expand ECC multiple tube.
Preferably, in the step 3, n-butyl acetate is packed into volume ratio the preparation method comprises the following steps: in dry container
It for the concentrated sulfuric acid, glacial acetic acid and n-butanol of 1:2:3, is uniformly mixed, puts into zeolite, vessel port is installed water segregator, filled on water segregator
Reflux condensing tube, and a certain amount of water is previously added in water segregator, container is heated to reflux on asbestos gauge, one timing of reaction
Between after water is gradually removed, water layer liquid level is in original height in holding water segregator, there is no water generation after waiting for a period of time,
Stop unloading lower shunt tube after heating is cooling, the reaction solution in the rouge layer and flask separated in water segregator is poured into separatory funnel together
In, it is 7 that rouge layer, which is washed with 10% sodium carbonate liquor to pH value, and rouge layer is washed with water and washs primary, branch vibration layer by branch vibration layer,
Rouge layer is poured into conical flask, a small amount of anhydrous sodium sulfate is added, the rouge layer after drying is poured into container, zeolite is added, in stone
Distillation is heated on cotton net, collects 115 DEG C~126 DEG C of fraction, i.e. n-butyl acetate.
Preferably, expansion ECC's the preparation method comprises the following steps: by weight, by 300~500 parts of water, cement 320~450
Part, 350~550 parts of quartz sand, 800~950 parts of flyash, 10~20 parts of water-reducing agent, 45~65 parts of silicon ash, quick lime 35~55
Part, be stirred in 30~40 parts of additions blending tanks of rubber powder, pass through while being stirred electrospinning process by 120~
The polymer solution that 150 parts of concentration are 5~12% is ejected into blending tank in the form of nanofiber, obtains expansion ECC；Institute is quiet
Electrical spinning method are as follows: by the polyvinyl alcohol, polyvinylpyrrolidone and 1- ethyl-3-methylimidazole cream that weight ratio is 2:1:0.2
Acid is added to the water, and is configured to the polymer solution that mass concentration is 5~12%, by polymer solution injection electrostatic spinning apparatus
It in spray containers with stainless steel spray head, is then applied the voltage on stainless steel spray head, and utilized and injection with high voltage power supply
The propulsion pump of container connection sprays the polymer solution in spray containers by stainless steel spray head, with the shape of nanofiber
Formula is sprayed to blending tank；The injection conditions that electroblowing process uses are as follows: environment temperature is 20~40 DEG C, and blending tank and stainless steel spray
The distance of head is 5~10cm, and polymer solution injection flow is 10~20mL/min, and voltage is 12~28kV, stainless steel spray head
Internal diameter be 0.8~1.6mm.
The present invention is include at least the following beneficial effects:
The present invention solves steel pipe in use since corrosion causes defect, and needs to repair when practical application to add
Solid problem.When producing the prestressed anchor in enormous quantities, since the plasticity of the steel ring I with conical outer surface is good, to material
Material requires low, can produce according to actual needs.FRP- expansion ECC composite pipe structure of the invention is simple, design is reasonable, real
It applies conveniently, can be widely applied in engineering；FRP- expansion ECC multiple tube of the invention is that adhesive plaster acts on simultaneously, in fiber cloth and
Encapsulating between steel pipe is anchored outside sleeve using annular anchorage to viscose fibre cloth and steel pipe, so that fiber cloth and steel pipe
Bond it is stronger, it is more advantageous for the reinforcement and repair of steel pipe, had excellent performance, can be shown using the expansion ECC and adhesive glue of preparation
Write the ultimate strength for improving FRP- expansion ECC multiple tube.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention:
Fig. 1 is the longitudinal sectional drawing that FRP- of the present invention expands ECC multiple tube；
Fig. 2 is the top view that FRP- of the present invention expands ECC multiple tube；
Fig. 3 is Section A-A figure in Fig. 1；
Fig. 4 is the left view of the steel ring I with conical outer surface of the left end Fig. 1；
Fig. 5 is the right view of the steel ring I with conical outer surface of Fig. 1 right end；
Fig. 6 is the detail drawing of the left part of Fig. 1；
Fig. 7 is the left view of Fig. 1；
Fig. 8 is the right view of Fig. 1；
Fig. 9 is the detail drawing of the right part Fig. 1；
Figure 10 is the front view of the steel ring I with conical outer surface；
Figure 11 is the front view of steel ring II；
Figure 12 is that the FRP- of another structure of the present invention expands the longitudinal sectional drawing of ECC multiple tube；
Figure 13 is the front view of the steel ring I with conical outer surface of another structure of the present invention.
Specific embodiment:
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
Fig. 1~11 show a kind of FRP- for penstock prestressed reinforcement of the invention and expand ECC multiple tube,
The outer surface of defect steel pipe 1 is set, comprising:
ECC layer 6 is expanded, the outer surface of defect steel pipe 1 is wrapped in；
Scrim cloth 2 is wrapped in the outer surface of expansion ECC layer 6；
Steel ring I 7 with conical outer surface 71, be respectively sleeved at the both ends of defect steel pipe 1 and be located at scrim cloth 2 with
Between defect steel pipe 8；The terminal interior surface of scrim cloth 2 is set on steel ring I 7；It can below scrim cloth by the pad of steel ring I
To play the role of anchoring fiber layer of cloth compound pipeline complex pipeline；Using the steel ring I with conical outer surface in order to by steel ring I pad in fibre
When tieing up below layer of cloth compound pipeline complex pipeline, the interface of cone-shaped is conducive to the insertion of steel ring I and enters, and scrim cloth can also be made compound
Pipeline and steel ring I are bonded closer；
Steel ring II 4, is set in the end outer surface of the scrim cloth 2 and corresponding with the position of steel ring I 7, with
Scrim cloth 2 is fixed between steel ring I 7 and steel ring II 4；
Wherein, it is provided with axial top preformed hole 3 positioned at the upper end of the steel ring I 7 of 1 one end of defect steel pipe, is located at defect
The lower end of the steel ring I 7 of 1 other end of steel pipe is provided with axial lower part preformed hole 5.
In this technical solution, by steel ring I with conical outer surface and steel ring II come anchoring fiber layer of cloth, fiber
Stronger between layer of cloth and defect steel pipe, more advantageous for the reinforcing of defect steel pipe, the effect of ECC layers of expansion is in fiber
Expansion is regenerated between layer of cloth and defect steel pipe, stress is applied to scrim cloth, while inward pressure also is generated to defect steel pipe,
Improve the ultimate strength of FRP- expansion ECC multiple tube；Scrim cloth is pasted, protection steel can be played, prevents the effect of corrosion；
Further promote application of the FRP fiber cloth in engineering.
In the above-mentioned technical solutions, the scrim cloth is two-way carbon fibre cloth layer, aramid fiber layer of cloth, high-strength glass fibre
Tie up layer of cloth, any one in basalt fibre layer of cloth.
In the above-mentioned technical solutions, the scrim cloth is multi-layer fiber cloth, and the multi-layer fiber cloth is that fiber cloth is passed through
Repeatedly it is wound；And the multi-layer fiber cloth is in 0 degree, 45 degree along fiber cloth length direction according to fiber filament；The multilayer
Epoxide-resin glue is coated between each layer fiber cloth of fiber cloth, and fiber cloth is impregnated with completely.In this way, multi-layer fiber
The structure of cloth can preferably play protection steel pipe, prevent the effect of corrosion, and FRP- expansion ECC multiple tube can be improved
Ultimate strength.
In the above-mentioned technical solutions, the two-way carbon cloth with a thickness of 0.12~0.15mm.
In the above-mentioned technical solutions, the steel ring I 7 is passed through by two semicircle steel rings I 72 with half-cone outer surface
Clamp connection composition；The steel ring II 4 is made up of two semicircle steel rings II 41 clamp connection, in this way, is led to
The mode for crossing clamp connection may be implemented fastening and disassembly to steel ring I 7 and steel ring II 4, and then the FRP- of formation expanded
ECC multiple tube is firmly fixed and easily dismantles.
In the above-mentioned technical solutions, as shown in Figure 12~13, the tapered surface of the steel ring I 7 with conical outer surface
End is provided with axial multiple branch pipes 73, and in this way, it is close that multiple branch pipes can be inflated ECC filling in the construction process
It is real, it can be tightly fixedly connected with expansion ECC, further improve the ultimate strength of FRP- expansion ECC multiple tube.
Embodiment 1:
A kind of construction technology expanding ECC multiple tube such as the above-mentioned FRP- for penstock prestressed reinforcement, including
Following steps:
Step 1: the surface of defect steel pipe is polished smooth, wiped with alcohol, then by polystyrene foam treasure
Pearl cotton glue special is sticked to defect steel tube surface；
Step 2: carrying out the winding of fiber cloth after being fixed to polystyrene foam on polystyrene foam surface, twining
Smear and be impregnated with fiber cloth completely with epoxy resin around process, then be conserved；
Step 3: forming scrim cloth after fiber cloth and epoxy resin solidification；It then is 1:2 acetic acid with volume ratio
N-butyl and xylene mixture solvent dissolve the polystyrene foam between scrim cloth and defect steel tube surface, and clear up
Completely；
Step 4: the steel ring I with conical outer surface is set between scrim cloth and defect steel pipe, and make both ends
The conical outer surface of steel ring I be oppositely arranged, and preformed hole setting in top is arranged through lower part preformed hole at most bottom in top
Portion；
Step 5: steel ring II is set in the end outer surface of the scrim cloth and corresponding with the position of steel ring I,
Scrim cloth to be fixed between steel ring I and steel ring II；
Step 6: injecting expansion ECC from lower part preformed hole, when overflowing until expanding ECC from top preformed hole, stop note
Enter, lower part preformed hole and top are reserved into hole plug, maintenance forms ECC layers of expansion, obtains for penstock prestressed reinforcement
FRP- expand ECC multiple tube；
In the step 3, for n-butyl acetate the preparation method comprises the following steps: in dry container, being packed into volume ratio is 1:2:3's
The concentrated sulfuric acid, glacial acetic acid and n-butanol are uniformly mixed, and put into zeolite, and vessel port installs water segregator, fills reflux condensation mode on water segregator
Pipe, and a certain amount of water is previously added in water segregator, container is heated to reflux on asbestos gauge, is reacted after a certain period of time water
It gradually removes, water layer liquid level is in original height in holding water segregator, and there is no water generations after waiting for a period of time, and stops heating
Lower shunt tube is unloaded after cooling, the reaction solution in the rouge layer and flask separated in water segregator is poured into separatory funnel together, rouge layer
Being washed with 10% sodium carbonate liquor to pH value is 7, and rouge layer is washed with water and washs once by branch vibration layer, and branch vibration layer falls rouge layer
Enter in conical flask, a small amount of anhydrous sodium sulfate is added, the rouge layer after drying is poured into container, zeolite is added, adds on asbestos gauge
115 DEG C~126 DEG C of fraction, i.e. n-butyl acetate are collected in thermal distillation；
Expansion ECC's the preparation method comprises the following steps: by weight, by 500 parts of water, 320 parts of cement, 350 parts of quartz sand, fine coal
950 parts of ash, 65 parts of silicon ash, 55 parts of quick lime, is stirred in 30 parts of addition blending tanks of rubber powder, is stirring by 20 parts of water-reducing agent
The polymer solution that 150 parts of concentration are 8% is ejected into the form of nanofiber electrospinning process while mixing
In blending tank, expansion ECC is obtained；Institute's electrospinning process are as follows: polyvinyl alcohol, the polyvinyl pyrrole for being 2:1:0.2 by weight ratio
Alkanone and 1- ethyl-3-methylimidazole lactic acid are added to the water, and the polymer solution that mass concentration is 8% are configured to, by polymer
Solution injects in the spray containers with stainless steel spray head of electrostatic spinning apparatus, is then applied the voltage to high voltage power supply stainless
On steel spray head, and using propulsions that connect with spray containers pump by the polymer solution in spray containers pass through stainless steel spray head into
Row injection, is sprayed in the form of nanofiber to blending tank；The injection conditions that electroblowing process uses are as follows: environment temperature 40
DEG C, blending tank at a distance from stainless steel spray head be 10cm, polymer solution injection flow be 20mL/min, voltage 28kV, no
The internal diameter of rust steel spray head is 1.6mm.
Embodiment 2:
A kind of construction technology expanding ECC multiple tube such as the above-mentioned FRP- for penstock prestressed reinforcement, including
Following steps:
Step 1: the surface of defect steel pipe is polished smooth, wiped with alcohol, then by polystyrene foam treasure
Pearl cotton glue special is sticked to defect steel tube surface；
Step 2: carrying out the winding of fiber cloth after being fixed to polystyrene foam on polystyrene foam surface, twining
Smear and be impregnated with fiber cloth completely with epoxy resin around process, then be conserved；
Step 3: forming scrim cloth after fiber cloth and epoxy resin solidification；Then the vinegar for being 1:2 with volume ratio
Sour N-butyl and xylene mixture solvent dissolve the polystyrene foam between scrim cloth and defect steel tube surface, and clear
Reason is clean；
Step 4: the steel ring I with conical outer surface is set between scrim cloth and defect steel pipe, and make both ends
The conical outer surface of steel ring I be oppositely arranged, and preformed hole setting in top is arranged through lower part preformed hole at most bottom in top
Portion；
Step 5: steel ring II is set in the end outer surface of the scrim cloth and corresponding with the position of steel ring I,
Scrim cloth to be fixed between steel ring I and steel ring II；
Step 6: injecting expansion ECC from lower part preformed hole, when overflowing until expanding ECC from top preformed hole, stop note
Enter, lower part preformed hole and top are reserved into hole plug, maintenance forms ECC layers of expansion, obtains for penstock prestressed reinforcement
FRP- expand ECC multiple tube；
In the step 3, for n-butyl acetate the preparation method comprises the following steps: in dry container, being packed into volume ratio is 1:2:3's
The concentrated sulfuric acid, glacial acetic acid and n-butanol are uniformly mixed, and put into zeolite, and vessel port installs water segregator, fills reflux condensation mode on water segregator
Pipe, and a certain amount of water is previously added in water segregator, container is heated to reflux on asbestos gauge, is reacted after a certain period of time water
It gradually removes, water layer liquid level is in original height in holding water segregator, and there is no water generations after waiting for a period of time, and stops heating
Lower shunt tube is unloaded after cooling, the reaction solution in the rouge layer and flask separated in water segregator is poured into separatory funnel together, rouge layer
Being washed with 10% sodium carbonate liquor to pH value is 7, and rouge layer is washed with water and washs once by branch vibration layer, and branch vibration layer falls rouge layer
Enter in conical flask, a small amount of anhydrous sodium sulfate is added, the rouge layer after drying is poured into container, zeolite is added, adds on asbestos gauge
115 DEG C~126 DEG C of fraction, i.e. n-butyl acetate are collected in thermal distillation；
Expansion ECC's the preparation method comprises the following steps: by weight, by 400 parts of water, 400 parts of cement, 500 parts of quartz sand, fine coal
800 parts of ash, 45 parts of silicon ash, 55 parts of quick lime, is stirred in 40 parts of addition blending tanks of rubber powder, is stirring by 20 parts of water-reducing agent
The polymer solution that 150 parts of concentration are 10% is ejected into the form of nanofiber electrospinning process while mixing
In blending tank, expansion ECC is obtained；Institute's electrospinning process are as follows: polyvinyl alcohol, the polyvinyl pyrrole for being 2:1:0.2 by weight ratio
Alkanone and 1- ethyl-3-methylimidazole lactic acid are added to the water, and the polymer solution that mass concentration is 10% are configured to, by polymer
Solution injects in the spray containers with stainless steel spray head of electrostatic spinning apparatus, is then applied the voltage to high voltage power supply stainless
On steel spray head, and using propulsions that connect with spray containers pump by the polymer solution in spray containers pass through stainless steel spray head into
Row injection, is sprayed in the form of nanofiber to blending tank；The injection conditions that electroblowing process uses are as follows: environment temperature 40
DEG C, blending tank is 5cm at a distance from stainless steel spray head, and polymer solution injection flow is 15mL/min, voltage 20kV, stainless
The internal diameter of steel spray head is 1.2mm, and the polymer nanofiber being prepared using this method can be carried out abundant with other raw materials
Fusion, and can be further improved FRP- expansion ECC multiple tube ultimate strength.
The expansion ECC prepared to the embodiment of the present invention 1 casts, and ECC layers of obtained expansion is tested for the property, and resists
Compressive Strength is 155Mpa, flexural strength 40Mpa, tensile strength 28.5Mpa.
The expansion ECC prepared to the embodiment of the present invention 2 casts, and ECC layers of obtained expansion is tested for the property, and resists
Compressive Strength is 157Mpa, flexural strength 42Mpa, tensile strength 29.5Mpa.
Comparative example 1:
Expansion ECC's the preparation method comprises the following steps: by weight, by 400 parts of water, 400 parts of cement, 500 parts of quartz sand, fine coal
800 parts of ash, 20 parts of water-reducing agent, 45 parts of silicon ash, 55 parts of quick lime, 40 parts of rubber powder, in 15 parts of addition blending tanks of polymer fiber
It is stirred, obtains expansion ECC；Polymer fiber be weight ratio be 2:1:0.2 vinal, polyvinylpyrrolidone
Fiber and 1- ethyl-3-methylimidazole lactic acid mixing composition；
Remaining technical process with it is identical in embodiment 2；
The expansion ECC prepared to comparative example 1 casts, and ECC layers of obtained expansion is tested for the property, compression strength
For 121Mpa, flexural strength 28Mpa, tensile strength 17.5Mpa.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (9)
1. a kind of FRP- for penstock prestressed reinforcement expands ECC multiple tube, the outer surface of defect steel pipe is set,
It is characterised by comprising:
ECC layers of expansion, is wrapped in the outer surface of defect steel pipe；
Scrim cloth is wrapped in the outer surface of ECC layers of expansion；
Steel ring I with conical outer surface is respectively sleeved at the both ends of defect steel pipe and is located at scrim cloth and defect steel pipe
Between；The terminal interior surface of scrim cloth is set on steel ring I；
Steel ring II is set in the end outer surface of the scrim cloth and corresponding with the position of steel ring I, by fiber cloth
Layer is fixed between steel ring I and steel ring II；
Wherein, it is provided with axial top preformed hole positioned at the upper end of the steel ring I of defect steel pipe one end, it is another to be located at defect steel pipe
The lower end of the steel ring I at end is provided with axial lower part preformed hole.
2. expanding ECC multiple tube for the FRP- of penstock prestressed reinforcement as described in claim 1, which is characterized in that
The scrim cloth is two-way carbon fibre cloth layer, in aramid fiber layer of cloth, high strength glass fiber sheet layer, basalt fibre layer of cloth
Any one.
3. expanding ECC multiple tube for the FRP- of penstock prestressed reinforcement as described in claim 1, which is characterized in that
The scrim cloth is multi-layer fiber cloth, and the multi-layer fiber cloth is fiber cloth by being repeatedly wound；The multilayer is fine
It ties up and coats epoxide-resin glue between each layer fiber cloth of cloth, and fiber cloth is impregnated with completely.
4. expanding ECC multiple tube for the FRP- of penstock prestressed reinforcement as claimed in claim 2, which is characterized in that
The two-way carbon cloth with a thickness of 0.12~0.15mm.
5. expanding ECC multiple tube for the FRP- of penstock prestressed reinforcement as described in claim 1, which is characterized in that
The steel ring I is made up of two semicircle steel rings I with half-cone outer surface clamp connection；The steel ring II is by two
Semicircle steel ring II is made up of clamp connection.
6. expanding ECC multiple tube for the FRP- of penstock prestressed reinforcement as described in claim 1, which is characterized in that
The end of the tapered surface of the steel ring I with conical outer surface is provided with axial multiple branch pipes.
7. a kind of FRP- as described in any one of claims 1 to 6 for penstock prestressed reinforcement expands ECC multiple tube
Construction technology, which comprises the following steps:
Step 1: the surface of defect steel pipe is polished smooth, wiped with alcohol, then by polystyrene foam pearl cotton
Glue special is sticked to defect steel tube surface；
Step 2: carrying out the winding of fiber cloth after being fixed to polystyrene foam on polystyrene foam surface, being wrapped over
Journey smear and be impregnated with fiber cloth completely with epoxy resin, is then conserved；
Step 3: forming scrim cloth after fiber cloth and epoxy resin solidification；Then with volume ratio be 1:2 acetic acid just
Butyl ester and xylene mixture solvent dissolve the polystyrene foam between scrim cloth and defect steel tube surface, and clear up dry
Only；
Step 4: the steel ring I with conical outer surface is set between scrim cloth and defect steel pipe, and make the steel at both ends
The conical outer surface of circle I is oppositely arranged, and preformed hole setting in top is arranged through lower part preformed hole in bottommost in top；
Step 5: steel ring II to be set in end outer surface and, the general corresponding with the position of steel ring I in the scrim cloth
Scrim cloth is fixed between steel ring I and steel ring II；
Step 6: injecting expansion ECC from lower part preformed hole, when overflowing until expanding ECC from top preformed hole, stop injection, it will
Hole plug is reserved on lower part preformed hole and top, and maintenance forms ECC layers of expansion, obtains for penstock prestressed reinforcement
FRP- expands ECC multiple tube.
8. the construction technology for the FRP- expansion ECC multiple tube of penstock prestressed reinforcement as claimed in claim 7,
It is characterized in that, in the step 3, for n-butyl acetate the preparation method comprises the following steps: in dry container, being packed into volume ratio is 1:2:3's
The concentrated sulfuric acid, glacial acetic acid and n-butanol are uniformly mixed, and put into zeolite, and vessel port installs water segregator, fills reflux condensation mode on water segregator
Pipe, and a certain amount of water is previously added in water segregator, container is heated to reflux on asbestos gauge, is reacted after a certain period of time water
It gradually removes, water layer liquid level is in original height in holding water segregator, and there is no water generations after waiting for a period of time, and stops heating
Lower shunt tube is unloaded after cooling, the reaction solution in the rouge layer and flask separated in water segregator is poured into separatory funnel together, rouge layer
Being washed with 10% sodium carbonate liquor to pH value is 7, and rouge layer is washed with water and washs once by branch vibration layer, and branch vibration layer falls rouge layer
Enter in conical flask, a small amount of anhydrous sodium sulfate is added, the rouge layer after drying is poured into container, zeolite is added, adds on asbestos gauge
115 DEG C~126 DEG C of fraction, i.e. n-butyl acetate are collected in thermal distillation.
9. the construction technology for the FRP- expansion ECC multiple tube of penstock prestressed reinforcement as claimed in claim 7,
It is characterized in that, expansion ECC's the preparation method comprises the following steps: by weight, by 300~500 parts of water, 320~450 parts of cement, quartz
350~550 parts of sand, 800~950 parts of flyash, 10~20 parts of water-reducing agent, 45~65 parts of silicon ash, 35~55 parts of quick lime, rubber
It is stirred in 30~40 parts of addition blending tanks of powder, it is dense by 120~150 parts by electrospinning process while being stirred
Degree is ejected into blending tank in the form of nanofiber for 5~12% polymer solution, obtains expansion ECC；Institute's electrostatic spinning
Method are as follows: polyvinyl alcohol, polyvinylpyrrolidone and 1- ethyl-3-methylimidazole lactic acid that weight ratio is 2:1:0.2 are added
In water, it is configured to the polymer solution that mass concentration is 5~12%, by polymer solution injection electrostatic spinning apparatus with stainless
It in the spray containers of steel spray head, is then applied the voltage on stainless steel spray head with high voltage power supply, and connected using with spray containers
The propulsion pump connect sprays the polymer solution in spray containers by stainless steel spray head, is sprayed in the form of nanofiber
To blending tank；The injection conditions that electroblowing process uses are as follows: environment temperature is 20~40 DEG C, blending tank and stainless steel spray head away from
From for 5~10cm, polymer solution injection flow is 10~20mL/min, and voltage is 12~28kV, the internal diameter of stainless steel spray head
For 0.8~1.6mm.
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| CN201811127451.6A CN109057395B (en) | 2018-09-27 | 2018-09-27 | FRP-expansion ECC composite pipe for prestress reinforcement of pressure steel pipe and construction process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11346106B2 (en) * | 2018-05-04 | 2022-05-31 | Fsc Technologies Llc | Pre-compression system for pre-compressing a structure |
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