CN107032675A - A kind of reinforced cementitious based composites of basalt fibre and preparation method thereof - Google Patents
A kind of reinforced cementitious based composites of basalt fibre and preparation method thereof Download PDFInfo
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- CN107032675A CN107032675A CN201710236950.8A CN201710236950A CN107032675A CN 107032675 A CN107032675 A CN 107032675A CN 201710236950 A CN201710236950 A CN 201710236950A CN 107032675 A CN107032675 A CN 107032675A
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- Prior art keywords
- cement mortar
- basalt fibre
- cement
- mortar
- upper strata
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/70—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- 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
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
-
- 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
Abstract
The present invention relates to reinforced cementitious based composites of a kind of basalt fibre and preparation method thereof, the composite includes being layed in from the bottom to top in the bottom cement mortar treated in strenthening member, basalt fibre grid and upper strata cement mortar, the bottom cement mortar and/or upper strata cement mortar being uniformly mixed with chopped strand.The composite of the present invention, which has, delays cracking, increase ductility, durability, the characteristic such as corrosion resistance, considerably increases the bonding characteristic between basalt fibre and cement mortar, the problems such as improving building structure surface easy to crack, cracky.Available for the flexural member in reinforced concrete structure, such as by camber beam, arcual component etc..
Description
Technical field
The present invention relates to Structures Reinforced Technique field, and in particular to a kind of composite wood of utilization fabric reinforcement cement base
Material and preparation method thereof, composite of more particularly to a kind of reinforced cementitious base of basalt fibre and preparation method thereof.
Background technology
Nowadays, reinforced concrete structure plays important role in numerous construction styles.However, with service life
Extension, or other cause reinforced concrete building component strength such as many reasons such as natural calamities, open caused by insufficient rigidity
Split, it is damaged situations such as frequently occur.How to ensure that building continues the use of normal safety, be difficulty of the building trade through being commonly encountered
Inscribe, therefore the Reinforcement technology of the highly reliable building structure of developmental research is very important.In structures numerous at present
In reinforcement technique, this reinforcing mode of fabric reinforcement cement-base composite material causes extensive concern, the advantage is that and does not change original
While physical dimension, the durability of structure, corrosion resistance, and easy construction, low cost are improved.
Basalt fibre is basalt building stones after 1450 DEG C~1500 DEG C melt, and passes through platinum-rhodium alloy bushing at a high speed
The continuous fiber drawn, intensity is suitable with high intensity S glass fibres.Basalt fibre is a kind of novel inorganic environment-friendly and green
High performance fibre material, it is by the oxide group such as silica, aluminum oxide, calcium oxide, magnesia, iron oxide and titanium dioxide
Into basalt building stones after high-temperature fusion, pass through bushing Defect.Not only intensity is high for basalt continuous fiber, and
And also there are a variety of excellent properties such as electric insulation, corrosion-resistant, high temperature resistant.
The content of the invention
Based on above-mentioned background technology, extremely prepared the invention provides a kind of reinforced cementitious based composites of basalt fibre
Method, the composite, which has, delays cracking, increase ductility, durability, the characteristic such as corrosion resistance, and considerably increases the Black Warrior
Bonding characteristic between rock fiber and Polymer-Modified Mortar, the problems such as improving building structure surface easy to crack, cracky.
Specifically, according to a kind of reinforced cementitious based composites of basalt fibre proposed by the present invention, wherein, including by
Under supreme be layed in the bottom cement mortar treated in strenthening member, basalt fibre grid and upper strata cement mortar；The bottom
Uniformly chopped strand is mixed with layer cement mortar and/or upper strata cement mortar.
Wherein described " from the bottom to top " be comparatively, closest to treat the contact surface of strenthening member for " under ", away to be added
Gu the direction of component for " on ".
The cement mortar is at least two layers；The basalt fibre grid is placed between two layers of cement mortar；According to treating
The reinforcing demand of strenthening member, can increase the number of plies of basalt fibre grid and cement mortar；For example order is：Structure to be reinforced
Part-cement sand bed-basalt fibre clathrum-cement sand bed-basalt fibre clathrum-cement sand bed, with such
Push away.
The basalt fibre grid is, using basalt fibre as base material, to be soaked by the anti-emulsion of macromolecule.So as to have
Good anti acid alkali performance, uvioresistant, durability, its chemical stability is good, and intensity is high, lightweight, good stability of the dimension, light weight
It is easy to construction.It can be used for a long time under 760 DEG C of hot environments, be that instead of the ideal material of glass fabric.Basalt fibre is strong
Degree is high, and high temperature resistant, with permanent fire retardant, is the low cost alternative of the high performance fibers such as carbon fiber and advanced fiber.
Described chopped strand can increase the intensity of cement matrix, and preferably chopped strand is the steel fibre that is chopped；Chopped strand
It is blended in two layers of cement mortar, the basalt fibre grid of centre can be protected；Cement mortar can also be increased fine with basalt
Tie up the bond effect of grid.
Present invention further propose that a kind of reinforced cementitious based composites of basalt fibre, wherein, the chopped strand
Length be 12-15mm；
Volume in the cement mortar is 1.5kg/m3~3.0kg/m3；
Present invention further propose that a kind of reinforced cementitious based composites of basalt fibre, wherein, the cement mortar
For polymer-modified cement mortar, the polymer-modified cement mortar includes binder materials, rubber powder, water, water reducer and sand
It is mixed；The binder materials, water, rubber powder, water reducer, the ratio of sand are 1：0.22~0.24：0.01~0.03：0.005
~0.007：1.5~2.5；
Preferably, the binder materials, water, rubber powder, water reducer, the ratio of sand are 1：0.22~0.24：0.02：0.006：
2。
Wherein, the binder materials is made up of cement, silicon ash, coal ash powder；The cement, silicon ash, the ratio of flyash are
8：0.8~1.2：0.8~1.2；
Preferably, the cement, silicon ash, the ratio of flyash are 8：1：1.
Polymer-modified cement mortar has certain pliability and high permeability resistance, with non-ignitable, temperature variation resistant, nontoxic, resistance to
Aging, the low characteristic of cost.Can not be limited by basic unit's geometry, again can bridging structure layer slight crack, can wetland construction
Many advantages, such as.
Present invention further propose that a kind of reinforced cementitious based composites of basalt fibre, wherein, the basalt is fine
At least one elongated end of dimension grid is anchored at described treat in strenthening member；The anchoring is preferably：It is polymerize with glass fibre
Nitride layer is fastened；More preferably：It is fastened again with fiberglass polymer layer after being fixed by epoxy resin.
The size of wherein described basalt fibre grid should be greater than bottom cement mortar, therefore basalt fibre grid is extremely
Few one end is " extension " with respect to bottom cement mortar and gone out.
Present invention further propose that a kind of reinforced cementitious based composites of basalt fibre, wherein, in addition to polyureas apply
Layer, the polyurea coating is sprayed on the outer layer of upper strata cement mortar.The thickness of the polyurea coating is 2mm-6mm；
It is preferred that, the thickness of the polyurea coating is 3-4mm.
The polyurea coating of the outer layer has higher pliability, wearability and durability, it is possible to increase the cracking resistance of mortar
Ability；Both all one's effort strike and the abrasion of most serious of a sledgehammer can have been born, while having enough pliabilities again.Even in
The obvious breathing of generation causes component to ftracture or steel construction deformation part, and film will not be also broken；Even in pipeline protrusion, sagging etc.
Under abnormal conditions, whole workpiece surface still can be intactly coated on, whole workpiece can be still protected.These excellent properties
It ensure that longevity and reliability of the polyureas in terms of engineer applied.
Present invention further propose that a kind of reinforced cementitious based composites of basalt fibre, wherein, the bottom cement
The ratio between thickness of mortar, basalt fibre grid and upper strata cement mortar is 5~20：0.2~1：5~20；Preferably, it is described
The thickness of bottom cement mortar and upper strata cement mortar is respectively 5mm~20mm；The thickness of the basalt fibre grid is
0.2mm~1mm；It is highly preferred that the thickness of the bottom cement mortar and upper strata cement mortar is respectively 10mm；The basalt
The thickness of fiber mesh is 0.2mm~0.3mm.
The thickness of the cement mortar entirely treats no too many thickness of increase for strenthening member relatively, but greatly increases
The durability of component.
Specifically, another object of the present invention is a kind of preparation method of the reinforced cementitious based composites of basalt fibre,
Wherein, comprise the following steps：
1) treat strenthening member two it is collateral enter template, cement mortar is poured into template, formed bottom cement mortar；Will be profound
Military rock fiber mesh immerses the bottom cement mortar, continues to pour into cement mortar, forms upper strata cement mortar, produce cement base
Composite；
2) compacting maintenance is carried out to cement-base composite material；Compacting maintenance, so-called pressure are carried out to cement-base composite material
Real maintenance is exactly after upper strata mortar has been smeared, to the uniformly applied pressure of screed, to make upper strata mortar fully and grid contact,
And continue a few minutes, to be conserved again afterwards；
The compacting maintenance is concretely：After cement-base composite material is stood into 24 hours, wet curing 7-15 days is further continued for
Natural curing 25-30 days, relative humidity is 90%-95%, and temperature is 18 DEG C -22 DEG C.
Preferably, it is mixed with chopped strand in the bottom and/or upper strata cement mortar；It is highly preferred that the chopped strand
For the steel fibre that is chopped.
The cement mortar is polymer-modified cement mortar, and the preparation method of the polymer-modified cement mortar is：
Cement, silicon ash, flyash, rubber powder, water, water reducer and chopped strand are mixed by proportioning, is slowly stirred 1-5 minutes, adds
Normal sand continues to stir 2-10 minutes.
Present invention further propose that a kind of reinforced cementitious based composites preparation method of basalt fibre, wherein also wrapping
Include：The top layer spray polyurea coating of the poly- composite of cement after maintenance.
The step of spray polyurea coating is：The top layer of cleaning polishing composite；Apply priming；Polyureas is sprayed；Spray
Apply and close up.The spray polyurea coating, using disposable coating processes, therefore in the absence of connecting sewing.Polyurea coating is a kind of nothing
Dirt material, with characteristics such as adhesive force is strong, rub resistance, hardness are strong, tensile strength is high；Can be in arbitrary surface, inclined-plane and vertical plane
Upper spray mo(u)lding, and no sag phenomenon.
Present invention further propose that a kind of reinforced cementitious based composites preparation method of basalt fibre, wherein, it is described
Step 1) also include：At least one elongated end of the basalt fibre grid is anchored at described treat in strenthening member；Specifically
At least one elongated end of basalt fibre grid is anchored at by epoxy resin to be treated in strenthening member, reuses glass fiber reinforcement
Its anchorage part is wound and wrapped up by polymeric layer, fixes it.
When the two ends in basalt fibre grid are anchored on original component, fiber mesh is adhered to epoxy resin
In component surface, then with glass fiber reinforced polymer layer wrapped up, fiberglass polymer layer parcel after gross thickness and
Mortar composite bed thickness is consistent, to improve the bond effect of anchoring strength, increase mortar composite bed and component surface.Finally spray
One layer of polyurea coating, can efficiently solve the problem of easy stress of fibrous material is peeled off when pasting carbon cloth on the outside of structure.
Present invention further propose that a kind of reinforced cementitious based composites preparation method of basalt fibre, wherein, it is described
Step 1) also include, before cement mortar is poured into, component surface to be reinforced first is subjected to dabbing processing；The dabbing processing can
With the bond effect for increasing it with reinforcing screed.
By above technical scheme, the present invention at least has advantages below：
The reinforced cementitious based composites quality of basalt fibre prepared by the present invention is slim and graceful, intensity is high, good corrosion resistance,
Durability is strong, does not increase the thickness of original component after reinforcing substantially, there is good bond effect between back-up coat and original component；
And cost is low, easy construction；The problems such as common reinforcing mortar is easy to crack can be efficiently solved.
1), prepared by the present invention the reinforced cementitious based composite material structure of basalt fibre is reasonable in design, simple structure, apply
Work is convenient, strengthen the adhesive property between concrete component and screed, it is ensured that the cooperation of concrete structure and screed,
Improve the cracking and damaging problem of original structure, solve ordinary mortar during engineer applied, due to tensile property difference
Cause the outstanding problem of cracking.
2), the basalt fibre grid ductility of the invention used is preferable, fire protecting performance is high, resistance to elevated temperatures is preferable, with water
Cement mortar matrix material compatibility is preferable, excellent in durability.
3), the polyurea coating that the present invention is used, can effectively improve the globality of screed, significantly increase screed
Anti-crack ability, and can effectively increase the durability and resistance to ag(e)ing of screed, improve screed and bonding for original structure is imitated
Really.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 show the diagrammatic cross-section of the reinforced cementitious basic unit's construction of basalt fibre；
Fig. 2 show the anchoring end structure detail drawing of the reinforced cementitious base material of basalt fibre；
1- cement mortar；2- basalt fibre grids；3- chopped strands；4- polyurea coatings；5- epoxy resin；6- glass fibers
Dimension enhancing polymeric layer；7- treats strenthening member
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
A kind of basalt fibre grid for concrete component reinforcing strengthens cement-base composite material, its preparation method bag
Include following steps：
1), by proportioning by cement, silicon ash, flyash, rubber powder, water, water reducer, the steel fibre that is chopped is mixed in mixer,
Stirring, adds normal sand and continues to stir, polymer-modified cement mortar is made；
2) strenthening member both sides formwork supporting plate, and two positioning strips of mark in template, are being treated, for pouring into two layers of polymers
The mark of modified cement mortar thickness；Polymer-modified cement mortar is cast in the template for treating strenthening member, one is poured into
At positioning strip；Basalt fibre grid is immersed on bedding mortar layer again, after basalt fibre grid is arranged, continues to pour
Polymer-modified cement mortar is built, to another positioning strip marked, prepared by mortar composite bed completes.
3), the maintenance of mortar composite bed；Whole mortar composite bed is subjected to compacting maintenance.
4), spray polyurea coating；After the maintenance of mortar composite bed, in whole screed surface spraying polyurea coating.Specifically
Technique：First ensure that mortar composite bed is parched completely, the position that original structure surface is protruded is polished with hand sand machine, low-lying
Point uses cement mortar filling-in, can be constructed after after the drying of mortar composite bed, i.e. the cleaning of basic unit's debris, ball blast → brushing is special
Closed up with priming paint → polyureas spraying application → spraying.
Embodiment 1
A kind of reinforced cementitious based composites of basalt fibre as shown in Figure 1, it, which is laid on, treats in strenthening member, and this is combined
Material from bottom to top lays underlying polymer modified cement mortar, basalt fibre grid, overlayer polymer modified cement mortar
And polyurea coating；Wherein mixed with chopped steel fibre in two layers of polymers modified cement mortar layer.
The size of the two layers of polymers modified cement mortar is consistent with the size for treating strenthening member；Two layers of polymers is modified
The thickness of cement mortar is respectively 10mm.The size of the basalt fibre grid is consistent with the size for treating strenthening member；Grid
Thickness be 0.2mm, the aperture of grid is 5mm × 5mm.The polyurea coating coats whole overlayer polymer and is modified cement bonded sand
Slurry；The thickness of polyurea coating is 4mm.
Polymer-modified cement mortar is mixed by binder materials, water, rubber powder, water reducer, and wherein binder materials is by water
Mud, silicon ash, flyash composition；Wherein cement, silicon ash, flyash, water, rubber powder, water reducer, the outfit ratio of normal sand are 8：1：
1：2.2：0.2：0.06：20；The length of steel fiber that is chopped is 12mm, and the amount of the chopped steel fibres of 1.5kg is added by every cubic metre of mortar
Mix in polymer-modified cement mortar.
Embodiment 2
A kind of reinforced cementitious based composites of basalt fibre as shown in Figure 2, it, which is laid on, treats in strenthening member, and this is combined
Material from bottom to top lays underlying polymer modified cement mortar, basalt fibre grid, overlayer polymer modified cement mortar
And polyurea coating；Wherein mixed with chopped steel fibre in two layers of polymers modified cement mortar layer.Wherein basalt fibre net
One end of lattice on strenthening member is treated, reuses the whole Black Warrior of fiberglass polymer layer winding using epoxy resin anchor connection
The part that rock fiber mesh is anchored by epoxy resin.
The length ratio of the two layers of polymers modified cement mortar layer treats the short 50mm of strenthening member；Wherein cement sand bed
One end is with treating flushing for strenthening member；The thickness of two layers of polymers modified cement mortar is respectively 20mm.The basalt fibre
The size of grid is consistent with the size for treating strenthening member；The thickness of basalt fibre grid is 0.3mm, and the aperture of grid is 2mm
×2mm；One end of wherein basalt fibre grid is anchored at by epoxy resin treats in strenthening member, reuses glass fibre polymerization
Nitride layer is fastened, fiberglass polymer layer cladding make its supply polymer-modified cement mortar it is short go out part, wrap
The height covered is also highly consistent with polymer-modified cement mortar layer.The polyurea coating coats whole overlayer polymer and is modified
Cement mortar and fiberglass polymer layer；The thickness of polyurea coating is 6mm.
Polymer-modified cement mortar is mixed by binder materials, water, rubber powder, water reducer, and wherein binder materials is by water
Mud, silicon ash, flyash composition, wherein cement, silicon ash, flyash, water, rubber powder, water reducer, the outfit ratio of normal sand are 8：
0.8：1.2：2.4：0.1：0.05：25；The length of steel fiber that is chopped is 15mm, and it is fine to add the chopped steel of 3.0kg by every cubic metre of mortar
The amount of dimension is mixed in polymer-modified cement mortar.
Embodiment 3
Strengthen cement base composite wood as shown in Figure 2 for a kind of basalt fibre grid for concrete component reinforcing
Material, its preparation method comprises the following steps：
1) surface of concrete structure to be reinforced is subjected to dabbing processing, increases it with reinforcing the bond effect of screed.
2) reinforced concrete member both sides formwork supporting plate, and cloth tagging 10mm and 20mm positioning strip are being treated；Basalt is fine
The thickness for tieing up grid is 0.2mm, and the thickness of basalt fibre grid can be neglected in labeling process.Total length between two templates
Less than the length for treating reinforced concrete member, one end 50mm length is reserved, basalt fibre net is anchored for epoxy resin (5)
Lattice (2).
3) from the chopped steel fibre that length is 12mm, the amount for adding the chopped steel fibres of 1.5kg by every cubic metre of mortar is mixed
In cement mortar.Cement, silicon ash, flyash, water, rubber powder, water reducer, the use ratio of normal sand are 8：1：1：2.2：0.2：
0.06：20.Cement, silicon ash, flyash, rubber powder, water, water reducer, the steel fibre that is chopped are put into mixer by proportioning slowly to stir
Mix 1 minute, then add normal sand and continue to stir 4 minutes, prepare the polymer-modified cement mortar with the steel fibre that is chopped；Will
Polymer-modified cement mortar is cast in the surface of concrete structure template to be reinforced after dabbing, and one end reserves 50mm progress
The anchoring of basalt fibre grid (2), is poured until at a positioning strip 10mm；
4) arrangement basalt fibre grid (2)：It is the basalt fibre net that 0.2mm, aperture are 5mm × 5mm from thickness
Lattice；Basalt fibre grid is cut out, makes its size consistent with the length and width for treating reinforced concrete member, by basalt fibre grid
(2) it is immersed in the bedding mortar of above-mentioned cement matrix layer；Basalt fibre grid (2) one end is with treating that reinforced concrete member leads to
Cross epoxy resin (5) anchoring together, anchorage length is 50mm, and the fiber cloth being made of glass fiber reinforced polymer is carried out
Parcel, by anchorage part and in treating that reinforced concrete member is all wrapped in.
5) it will be cast in the steel fibre polymer-modified cement mortar that is chopped on basalt fibre grid, until another
At positioning strip 20mm.
6) whole mortar composite bed is subjected to compacting maintenance, specific maintenance method：The moisture-keeping maintaining after mortar final set has been poured
After 24 hours；Carry out wet curing 7-15 days again, water daily, holding member be in moisture state, and avoid burning sun be exposed to the sun and
Cross forced ventilation.Finally in natural curing 28 days, curing temperature is 20 DEG C ± 2 DEG C, and relative humidity is 95%.
7) after the maintenance of mortar composite bed, at whole mortar layer surface, including anchoring basalt fibre grid, spraying is poly-
Urea coating, the thickness of spraying is 3mm.Concrete technology：First ensure that screed is parched completely, the position that original structure surface layer is protruded
Polished with hand sand machine, it is low-lying point use cement mortar filling-in, it is to be dried after can be constructed, i.e., basic unit's debris cleaning,
Ball blast → brushing base paint special → polyureas spraying application → spraying is closed up.
Embodiment 4
1) component surface to be reinforced is subjected to dabbing processing, increases it with reinforcing the bond effect of screed.
2) strenthening member both sides formwork supporting plate, and cloth tagging 20mm and 40mm positioning strip are being treated；Basalt fibre grid
Thickness be 0.3mm, the thickness of basalt fibre grid can be neglected in labeling process.Length between two templates is less than to be added
Gu the length of concrete component, each reserved 50mm in two ends length, for using epoxy resin (5) anchoring basalt fibre grid
(2)。
3) from the chopped steel fibre that length is 15mm；The amount for adding the chopped steel fibres of 3.0kg by every cubic metre of mortar is mixed
In cement mortar.Cement, silicon ash, flyash, water, rubber powder, water reducer, the use ratio of normal sand are 8：1.2：0.8：2.4：
0.3：0.07：15.Cement, silicon ash, flyash, rubber powder, water, water reducer, the steel fibre that is chopped are blended in mixer by proportioning,
It is slowly stirred 2 minutes, then adds normal sand and continue to stir 4 minutes, prepare the polymer modification water with the steel fibre that is chopped
Cement mortar；It is cast in the component surface template after dabbing, two ends respectively reserve 50mm and carry out basalt fibre grid (2)
Anchoring, pour until at positioning strip 20mm；
4) arrangement basalt fibre grid (2)：It is the basalt fibre that 0.3mm, aperture are 10mm × 10mm from thickness
Grid；Basalt fibre grid is cut out, makes its size identical with the length and width for treating strenthening member, basalt fibre grid (2) is soaked
Enter into the bedding mortar layer of above-mentioned cement matrix；Basalt fibre grid (2) two ends are with treating that reinforced concrete member passes through ring
Oxygen tree fat (5) is anchored together, and anchorage length is 50mm, and the fiber cloth being made of glass fiber reinforced polymer is wrapped
Wrap up in, by anchorage part and in treating that reinforced concrete member is all wrapped in.
5) polymer-modified cement mortar with chopped steel fibre is cast on basalt fibre grid, until it is another
At the 40mm of one positioning strip, mortar composite bed is made.
6) whole mortar composite bed is subjected to compacting maintenance, specific maintenance method：The moisture-keeping maintaining after mortar final set has been poured
After 24 hours；Carry out wet curing 7-15 days again, water daily, holding member be in moisture state, and avoid burning sun be exposed to the sun and
Cross forced ventilation.Finally in natural curing 28 days, curing temperature is 20 DEG C ± 2 DEG C, and relative humidity is 95%.
7) again after mortar composite bed compacting maintenance, by whole screed surface spraying polyurea coating, the thickness of spraying is
2mm.Concrete technology：First ensure that screed is parched completely, the position that original structure surface is protruded is polished with hand sand machine,
It is low-lying point use cement mortar filling-in, it is to be dried after can be constructed；I.e. basic unit's debris cleaning, ball blast → brushing base paint special
→ polyureas spraying application → spraying is closed up.
Although above having made to retouch in detail to the present invention with general explanation, embodiment and experiment
State, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, are belonged to claimed
Scope.
Claims (10)
1. a kind of reinforced cementitious based composites of basalt fibre, it is characterised in that including being layed in structure to be reinforced from the bottom to top
Bottom cement mortar, basalt fibre grid and upper strata cement mortar on part；
Uniformly chopped strand is mixed with the bottom cement mortar and/or upper strata cement mortar.
2. composite according to claim 1, it is characterised in that the cement mortar is polymer-modified cement sand
Slurry, the polymer-modified cement mortar is mixed by binder materials, water, rubber powder, water reducer, the binder materials, water, glue
Powder, water reducer, the ratio of sand are 1：0.22~0.24：0.01~0.03：0.005~0.007：1.5~2.5；
Preferably, the binder materials is made up of cement, silicon ash and coal ash powder；The cement, silicon ash, the ratio of flyash are 8：
0.8~1.2：0.8~1.2.
3. composite according to claim 1 or 2, it is characterised in that the aperture of the basalt fibre grid is 2~
10mm × 2~10mm；
Preferably, the aperture is 5mm × 5mm.
4. the composite according to claims 1 to 3 any one, it is characterised in that the bottom cement mortar, the Black Warrior
The ratio between rock fiber mesh and the thickness of upper strata cement mortar are 5~20：0.2-1：5~20；
Preferably, the thickness of the bottom cement mortar and upper strata cement mortar is respectively 5mm~20mm；The basalt fibre
The thickness of grid is 0.2-1mm；
It is highly preferred that the thickness of the bottom cement mortar and upper strata cement mortar is respectively 10mm, the basalt fibre net
The thickness of lattice is 0.2-0.3mm.
5. the composite according to Claims 1 to 4 any one, it is characterised in that the basalt fibre grid
At least one elongated end is anchored at described treat in strenthening member；
The anchoring is preferably：It is fastened with fiberglass polymer layer；More preferably：Used again after being fixed by epoxy resin
Fiberglass polymer layer is fastened.
6. the composite according to Claims 1 to 5 any one, it is characterised in that the length of the chopped strand is
12-15mm；And/or, the volume in the cement mortar is 1.5kg/m3~3.0kg/m3；
Preferably, the chopped strand is the steel fibre that is chopped.
7. the composite according to claim 1~6 any one, it is characterised in that also including being sprayed on the upper strata
The polyurea coating on cement mortar surface；
Preferably, the thickness of the polyurea coating is 2mm-6mm；
It is highly preferred that the thickness of the polyurea coating is 3-4mm.
8. the preparation method of the reinforced cementitious based composites of basalt fibre described in any one of claim 1~7, its feature exists
In comprising the following steps：
1) cement mortar is poured on strenthening member is treated, bottom cement mortar is formed；Basalt fibre grid is immersed into the bottom
Layer cement mortar, continues to pour into cement mortar, forms upper strata cement mortar, produce cement-base composite material；
2) compacting maintenance is carried out to cement-base composite material；
Preferably, it is mixed with chopped strand in the bottom and/or upper strata cement mortar；
It is highly preferred that the chopped strand is the steel fibre that is chopped.
9. preparation method according to claim 8, it is characterised in that the step also includes, upper after the maintenance
Layer mortar surface spray polyurea coating；
Preferably, the step of spray polyurea coating is：Cleaning polishing is carried out to the cement-base composite material after the maintenance；
Apply priming；Spray polyurea；Spraying is closed up.
10. the preparation method according to claim 8-9, it is characterised in that the step 1) also include：By the basalt
At least one elongated end of fiber mesh is anchored at described treat in strenthening member；
It is highly preferred that the step 1) also include：Before cement mortar is poured into, the surface for treating strenthening member is first subjected to dabbing
Processing.
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| CN114718339A (en) * | 2022-04-26 | 2022-07-08 | 中交上海港湾工程设计研究院有限公司 | Structure for reinforcing beam, plate and column by adopting basalt fiber grid system and construction method |
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| CN114855898A (en) * | 2022-04-27 | 2022-08-05 | 中交第三航务工程局有限公司 | Structure for reinforcing wharf pile foundation by adopting basalt fiber sleeve and construction method |
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Application publication date: 20170811 |