CN109138490A - A kind of method and its masonry using NSM-TRC reinforcing masonry structure - Google Patents
A kind of method and its masonry using NSM-TRC reinforcing masonry structure Download PDFInfo
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Classifications
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention is a kind of method and its masonry using NSM-TRC reinforcing masonry structure.This method is a kind of masonry bearing capacity new method for enhancing concrete (NSM-TRC) in the embedded fiber mesh grid of masonry structure surface, by slotting on masonry structure surface, then TRC is embedded in, is bonded to inside grooves, so that the two becomes the masonry bearing capacity new method of an entirety.The present invention can reduce the processing on masonry structure surface; while improving structural-load-carrying capacity; the original style and features and aesthetics that ancient building can preferably be protected, hardly increase the sectional dimension and self weight of original structure after reinforcing, the reinforcement for being particularly suitable for domestic and international ancient building and Local Damaged masonry structure is reinforced.In addition, the cost of manufacture of TRC has very big advantage compared with reinforcing bar, steel mesh, FRP substrate cementitious material etc., form of construction work is pollution-free, meets country's popularization and economizes on resources, the requirement of economic, efficient New Building Materials.
Description
Technical field
It is specifically a kind of to use surface embedded type (Near- the present invention relates to the reinforcing of masonry structure and maintenance field
Surface mounted, abbreviation NSM) and fiber knitted net enhancing concrete (Textile reinforced concrete, referred to as
TRC) the new method of reinforcing masonry structure.
Background technique
China's masonry structure is widely used, existing a large amount of rare cultural relics protection building, structures, built and newly-built township
The masonry structures such as town local-style dwelling houses building.Masonry structure itself there are materials it is fragile, ductility is poor, poor seismic behavior the disadvantages of, and portion
Point building is more early because building the age, affected by environment larger, builds various aspects of performance so that most of not to be able to satisfy China existing
The requirement of building aseismicity specification, therefore to existing masonry structure, especially to some ancient times masonry knots with important historic significance
Structure repair and has a very important significance and be worth with reinforcing." the masonry bearing capacity design specification " of the newest publication in China
(GB50702-2011) it is described in using concrete board wall method for strengthening, reinforcing steel net shell plastering method for strengthening, outsourcing fashioned iron
Method for strengthening adds the masonry bearing capacities methods such as constructional column, collar tie beam method for strengthening.These reinforcement means are strong in improvement masonry structure
Degree, rigidity and anti-seismic performance etc. play certain effect, but all there are some disadvantages in actual engineer application.Example
Such as, increase dead load and volume, change structure type, reduce house use space, long construction period etc..For ancient times masonry
Building, these reinforcement means are even more to destroy the original historical sites of structure, do not meet in Law For the Preservation of Antiques that " restoring the old as the old does not change
The principle of change original appearance ".It is reinforced masonry wall side more common at present using surface mount and embedded fiber enhancing polymer (FRP)
Method, though the shortcomings that this method preferably compensates for above-mentioned reinforcing mode, because its binding material mostly uses greatly epoxide-resin glue etc.
Organic binding material, exist involve great expense, fire resistance is poor, resistance to corrosion is weak, the gas being harmful to the human body is generated after by high temperature,
Be not suitable for the disadvantages of using under low temperature and moisture environment.Meanwhile these organic binding materials can be by after Long Term Contact ultraviolet light
Gradually aging shows apparent brittleness, and then generates the problems such as FRP reinforcing layer is peeled off with structure unsticking.
Fiber knitted net enhancing concrete (TRC) refers mainly to use fiber knitted net and high-performance fine concrete (also referred to as
TRC original concrete) a kind of composite material for mixing, the fibrous material intensity with higher in TRC is used in knot
The bearing capacity of structure can be greatly improved in structure reinforcing.Currently, having carried out some grind for masonry bearing capacity to TRC both at home and abroad
Study carefully, mainly pastes it into masonry structure surface, though such method can preferably improve existing masonry bearing capacity technology
Deficiency, but be easy because of the influence of the factors such as the abrasion of external environment, shock to lose consolidation effect, and this method change it is original
The style and features of structure is unsatisfactory for the maintenance and reinforcement requirement of ancient building, has some limitations.Therefore one kind need to be designed in masonry structure
The reinforcement means that inside is enhanced, to protect reinforcing layer and the protection original historical sites of masonry structure.In view of masonry
The characteristic of structure own material, the reinforcement means of such inside are related to the choosing of the design of internal reinforcement construction method, reinforcement material
It selects, the problems such as the durability of the adhesive property of reinforcement material and masonry, reinforcement material, needs further to research and solve.
Summary of the invention
It is an object of the present invention to propose a kind of fine in the insertion of masonry structure surface for the above problem existing for current techniques
Tie up the masonry bearing capacity new method of mesh grid enhancing concrete (NSM-TRC).This method is slotted on masonry structure surface, then
By TRC insertion, inside grooves are bonded to, so that the two becomes the masonry bearing capacity new method of an entirety, i.e. surface is embedded in
Formula TRC (abbreviation NSM-TRC).
The technical solution of the present invention is as follows:
A method of using NSM-TRC reinforcing masonry structure, comprising the following steps:
(1) it slots to ruggedized construction surface: treating reinforcing masonry structure surface and cleared up, slot along horizontal mortar joint direction
Or it slots along vertical-horizontal mortar joint direction；Wherein groove width can according to reinforcing masonry structure actual conditions selection 8~
15mm, groove depth select 25mm~40mm, and fluting spacing takes 1/3~1/4 along fluting direction wall length, and slotting length takes away
The overall length of slot direction wall；Described is brick masonry structure made of brick and masonry mortar masonry to reinforcing masonry structure；Especially
It is the ancient building using the structure；
(2) preparation fiber knitted net: the fiber knitted net being woven into using high strength fibre, fibrage thickness of net 1~
2mm, fiber knitted net size of mesh opening 5mm × 5mm, fiber knitted net width take the 2/3 of groove depth；The fiber for being cut to strip is compiled
Knitmesh is immersed in epoxide-resin glue 1~2 minute, is taken out the fiber knitted net brush applied 3~5 times, is shed one layer on it
The fine sand of 0.15~0.6mm, the amount of shedding be every square metre of mesh grid shed 1.2~1.6kg fine sand, then in air solidification 24~
48 hours, for use；The high strength fibre is carbon fiber, basalt fibre or carbon-glass combined filament；
(3) preparation of TRC original concrete: TRC original concrete ingredient includes cement, silica sand and water；The silica sand
Partial size be 0.15~1.2mm silica sand；The TRC original concrete preferred mass proportion is cement: I grade of flyash: silicon
Ash: water: fine sand: coarse sand: water-reducing agent=475:168:35:262:460:920:3.25；The fine sand refer to partial size 0.15~
0.6mm silica sand, coarse sand refer to that partial size is 0.6~1.2mm silica sand；First silica sand, cement, I grade of flyash and silicon ash are successively put into and stirred
It mixes in machine and stirs 30~60 seconds, add water and water-reducing agent, stir 2~3 minutes, obtain TRC original concrete；The diminishing
Agent is specially high-efficiency water-reducing agent of poly-carboxylic acid；
(4) bottom TRC original concrete is poured in groove: being soaked with tap water cross-notching region, soaks completion
Afterwards, water and dirt extra in groove are removed, then pours TRC original concrete in bottom portion of groove；TRC original concrete thickness
In 2~3mm；
(5) fibre strip mesh grid obtained in step (2) embedded fiber mesh grid: is placed on to the middle part of groove；
(6) it fills TRC original concrete: TRC original concrete being uniformly filled in the gap of groove with trowel；
(7) processing of body structure surface: complete step (6) after, with small trowel will reinforce layer surface smooth out, remove outflow or
Overflow the TRC original concrete of slot and the foul and sundries on masonry surface；After the hardening of TRC reinforcing layer, using building mill base
Or coating carries out TRC reinforcing area to repair old processing, keeps almost the same with former masonry structure color, obtains the NSM-
TRC reinforcing masonry structure.
A kind of compound masonry structure, the structure are followed successively by inside mortar levelling layer, masonry structure, NSM-TRC from inside to outside
Reinforcing layer, outside mortar levelling layer, heat-insulation mortar bed, cracking resistance enhancement layer, decorative layer；Thermal insulation anchoring member is distributed in cracking resistance enhancement layer
It is interior, alkaline-resisting grid cloth in cracking resistance enhancement layer, heat-insulation mortar bed, outside mortar levelling layer are sequentially passed through until in masonry structure
Portion；
The NSM-TRC reinforcing layer is located on masonry structure, slots along horizontal mortar joint direction or along vertical-horizontal mortar joint side
To width is 8~15mm, and depth is 25mm~40mm, and fluting spacing takes 1/3~1/4 along fluting direction wall length, and length takes
The overall length of fluting direction wall；Material is using high-performance fine concrete as matrix, and fiber knitted net is arranged in centre；
The inside cement mortar screeding thickness degree 5mm~10mm；
The masonry structure is brick masonry structure made of being built as brick and masonry mortar；
The outside cement mortar screeding layer with a thickness of 3~5mm；
It is described heat-insulation mortar bed for adhesive polystyrene granule heat-insulating mortar, 20~40mm of insulation layer thickness；
The thermal insulation mortar anchoring piece is bolt or screw, is distributed in cracking resistance enhancement layer in matrix form, every square metre
Anchoring piece quantity is 4~5；The effective thickness that anchoring piece hammers into masonry structure is 40~60mm；
The cracking resistance enhancement layer is made of anticracking grout and the alkaline-resisting grid cloth being located therein, 5~8mm of thickness；
The decorative layer is ceramic tile or coating.
Compared with existing reinforced masonry wall technology, the beneficial effects of the present invention are:
The TRC that NSM-TRC reinforcement technique of the invention uses has lightweight, high-strength, fire resisting, high temperature resistant, compatible with structure
Property the characteristics such as good, be applied to masonry bearing capacity, hardly increase cutting for original structure without additional protective layer, after reinforcing
Face size and self weight effectively compensate for deficiency existing for traditional masonry bearing capacity method.In addition, the cost of manufacture of TRC compared with
Reinforcing bar, steel mesh, FRP substrate cementitious material etc. have very big advantage, and form of construction work is pollution-free, meet country and promote saving
Resource, the requirement of economic, efficient New Building Materials.
The TRC matrix used in NSM-TRC reinforcement technique is a kind of inorganic cementitious material, by it for TRC original concrete
For masonry bearing capacity, can the currently most used surface mount FRP reinforcing mode of very good solution exist and use asphalt mixtures modified by epoxy resin
The organic binding materials such as rouge and be not suitable for the problems such as constructing under low temperature and moisture environment.
For surface mount reinforcement technique, NSM-TRC reinforcement technique further increases TRC reinforcing layer and builds with wait reinforce
The contact area of body structure, interfacial bond property is more excellent, can preferably play the intensity of fiber knitted net in TRC, into
And it can greatly improve the mechanical property of brick masonry structure.Also, since fiber knitted net is glued in masonry groove,
The TRC reinforcing layer after reinforcing may make effectively to avoid the destruction caused by it of the factors such as external impact, abrasion, environmental corrosion,
So that its endurance quality, fire resistance are further promoted.
NSM-TRC reinforcement technique can reduce the processing on masonry structure surface, can maintain the original style and features and beauty of building
The property seen meets the correlation that Excellent Historical Building in Law For the Preservation of Antiques is protected and mutually asks, and is particularly suitable for having important history meaning both at home and abroad
The maintenance and reinforcement of the ancient times masonry structure of justice.
NSM-TRC reinforcement technique arrangement is flexible, can meet the requirement when enhancing of different direction orientation and local reinforcement,
The reinforcement for being particularly suitable for Local Damaged masonry structure is reinforced.
Detailed description of the invention
Fig. 1 is that the NSM-TRC in the embodiment of the present invention 1 vertically reinforces the positive elevational schematic view of brick masonry wall；
Fig. 2 is that the NSM-TRC in the embodiment of the present invention 1 vertically reinforces brick masonry wall Section A-A schematic diagram；
Fig. 3 is the positive elevational schematic view of NSM-TRC horizontal reinforcing brick masonry wall in the embodiment of the present invention 2；
Fig. 4 is the NSM-TRC horizontal reinforcing brick masonry wall side elevation schematic diagram in the embodiment of the present invention 2.
Wherein: 1- masonry wall to be reinforced, 2-NSM-TRC reinforcing layer, 3-TRC original concrete, 4- fiber knitted net.
Fig. 5 is the compound masonry structure schematic perspective view in the embodiment of the present invention 3；
Fig. 6 is the positive elevational schematic view of compound masonry structure in the embodiment of the present invention 3；
Fig. 7 is the compound masonry structure A-A vertical section schematic diagram in the embodiment of the present invention 3；
Fig. 8 is the compound masonry structure cross-sectional view in the embodiment of the present invention 3.
Wherein: mortar levelling layer on the inside of 11-, 12-NSM-TRC reinforcing layer, 13- masonry structure, mortar levelling on the outside of 14-
Layer, 15- is heat-insulation mortar bed, 16- thermal insulation mortar anchoring piece, 17- cracking resistance enhancement layer, 18- decorative layer.
Specific embodiment
The present invention provides a kind of methods using NSM-TRC reinforcing masonry structure, comprising the following steps:
(1) it slots to ruggedized construction surface: treating reinforcing masonry structure surface and cleared up, according to the demand of reinforcing, selection
It slots along horizontal mortar joint direction or slots (such as Fig. 1, shown in 3) along vertical-horizontal mortar joint direction, then in the slot area line of ink marker
Box pop-up fluting dimension line, to carry out slot treatment.Wherein groove width can be according to the actual conditions to reinforcing masonry structure
8~15mm is selected, groove depth selects 25mm~40mm, and fluting spacing takes 1/3~1/4 along fluting direction wall length, fluting
Length takes away the overall length of slot direction wall.Fluting instrument can be used professional groover or makita 4100NH, and when fluting should ensure that in slot
Top and bottom are parallel, clear up after fluting groove, remove dust and sundries in slot.Described is brick to reinforcing masonry structure
Body structure.
(2) prepare fiber knitted net: being spun using high strength fibre (such as carbon fiber, basalt fibre, carbon-glass combined filament)
It is made into fiber knitted net, fibrage 1~2mm of thickness of net, fiber knitted net size of mesh opening 5mm × 5mm are cut according to fluting size
The fiber knitted net of corresponding size is cut out, fiber knitted net width takes the 2/3 of groove depth.It is equal that the fiber knitted net sheared is immersed into stirring
It 1~2 minute in even epoxide-resin glue, takes out the fiber knitted net brush applied 3~5 times repeatedly, until on web
Form one layer of bright film.Take advantage of fiber woven net surface epoxide-resin glue do not solidify before, shed one evenly thereon
The fine sand of 0.15~0.6mm of layer, the amount of shedding are that 1.2~1.6kg fine sand is shed in every square metre of mesh grid, are solidified to epoxy resin
Afterwards, fine sand is just bonded in fiber woven net surface, solidifies 24~48 hours after production in air, for use.
(3) preparation of TRC original concrete: TRC original concrete main component is cement, silica sand and water.To guarantee to add
Stereoplasm amount and easy for construction, TRC original concrete should have the working performances such as good self compacting ability, low-shrinkage and have
Higher early strength can mix flyash, silicon ash, water-reducing agent isoreactivity admixture in concrete and be subject to its working performance
Improve；Good bonding is formed to guarantee that TRC original concrete can pass through fiber knitted net, the partial size of silica sand should not be too
Greatly, it is proposed that use partial size for the silica sand of 0.15~1.2mm；To guarantee fiber knitted net and the good bonding of TRC original concrete
Interface performance, TRC original concrete 28d compression strength are not lower than 40MPa.By above-mentioned requirements, it is proposed that use cement: I grade of powder
Coal ash: silicon ash: water: fine sand: coarse sand: water-reducing agent=475:168:35:262:460:920:3.25 match ratio prepares TRC base
Body concrete, it for 42.5 ordinary portland cement, the ratio of mud 0.4, water-reducing agent is polycarboxylic acids that cement, which uses strength grade, herein
High efficiency water reducing agent.Meanwhile to ensure sand-grading uniformly continuous, the mix proportion selection silica sand of two kinds of partial sizes, medium-fine sand
Refer to that 0.15~0.6mm of partial size silica sand, coarse sand refer to that partial size is 0.6~1.2mm silica sand, and the quality of coarse sand is fine sand in unit volume
2 times.Preparation process uses mechanical stirring, and feeding sequence is that first silica sand, cement, I grade of flyash and silicon ash are successively put into and stirred
It mixes in machine and stirs 30~60 seconds, be stirring evenly and then adding into water and water-reducing agent, stir 2~3 minutes, water-reducing agent volume is cement quality
0.5%~1.0%.The material of water-reducing agent should meet GB8076-2008 " concrete admixture " and GB50119-2013 " coagulation
Native additive application technology specification " in related request, concrete optimum test should be carried out before test, in the hope of the optimum mix amount.
(4) bottom TRC original concrete is poured in groove: being soaked with tap water cross-notching region, soaks completion
Afterwards, water and dirt extra in groove are removed, TRC original concrete is then poured in groove.With trowel by TRC matrix coagulation
Soil is uniformly brushed in the entire line of rabbet joint, guarantees TRC original concrete thickness in 2~3mm.
(5) the fibre strip mesh grid prepared: being placed on the middle part of groove by embedded fiber mesh grid, is applied slight
It is parallel with fluting direction that pulling force makes the direction of fiber knitted net, and makes its being equidistant with groove both sides.
(6) it fills TRC original concrete: TRC original concrete being uniformly filled in the gap of groove with trowel,
By being filled in the way of from side to the other side, guarantee that filling is completely in slot and TRC reinforcing layer and masonry structure surface are flat
Together.After filling, TRC original concrete is slowly plugged and pounded with small trowel, so that the TRC original concrete in groove
With fiber knitted net and masonry groove surfaces formed it is good contact, no apparent gap generates, and is should be noted that when plugging and pounding not to fibre
Dimension mesh grid damages or it is made to generate fold.
(7) processing of body structure surface: complete step (6) after, with small trowel will reinforce layer surface smooth out, remove outflow or
Overflow the TRC original concrete of slot and the foul and sundries on masonry surface.After TRC reinforcing layer conserves 28 days, using permeability
Preferable building mill base or coating carry out TRC reinforcing layer to repair old processing, keep almost the same with former masonry structure color.To original
There is masonry structure of the structure appearance without strict demand, old material can be repaired with cement mortar replacement is above-mentioned, directly to TRC reinforcing area
Jointing is carried out, the NSM-TRC reinforcing masonry structure can be obtained.
The invention further relates to the compound masonry structure that this method obtains, the compound masonry structure, as viewed in figures 5-8,
Including being followed successively by inside mortar levelling layer 11, masonry structure 13, NSM-TRC reinforcing layer 12, outside mortar levelling layer from inside to outside
14, heat-insulation mortar bed 15, thermal insulation mortar anchoring piece 16, cracking resistance enhancement layer 17, decorative layer 18；The thermal insulation anchoring member 16 is distributed
In cracking resistance enhancement layer 17, alkaline-resisting grid cloth in cracking resistance enhancement layer 17, heat-insulation mortar bed 15, outside mortar levelling are sequentially passed through
Layer 14 is until inside masonry structure 13；
The NSM-TRC reinforcing layer 12 is obtained by above-mentioned construction method；On masonry structure, opened along horizontal mortar joint direction
Slot or along vertical-horizontal mortar joint direction, width is 8~15mm, and depth is 25mm~40mm, and fluting spacing takes along fluting direction wall
The 1/3~1/4 of length, length take away the overall length of slot direction wall；Material is using high-performance fine concrete as matrix, and centre is matched
If a kind of fiber knitted net that fiber knitted net is constituted enhances cement-base composite material；
The inside cement mortar screeding layer 11 cement in mass ratio: flyash: sand=2:1:3 is mixed, thick
Spend 5mm~10mm；
The masonry structure 13 is to be built with masonry mortar according to Structural Design Requirement and corresponding construction technology by brick
Made of structure；
The outside cement mortar screeding layer 14 is the cement mortar of 3~5mm of thickness, and quality proportioning is cement: sand=
1:3；
Described heat-insulation mortar bed 15 be adhesive polystyrene granule heat-insulating mortar, 20~40mm of insulation layer thickness；
The thermal insulation mortar anchoring piece 16 is for fixing alkaline-resisting grid cloth and adiabator layer 15 in cracking resistance enhancement layer 17
Bolt or screw, anchoring piece quantity should meet design requirement, be distributed in cracking resistance enhancement layer 17 in matrix form, every square metre
Anchoring piece quantity is 4~5；Anchoring piece passes through alkaline-resisting grid cloth, heat-insulation mortar bed 15, outside mortar in cracking resistance enhancement layer 17
Screed-coat 14 is until inside masonry structure 13, and to guarantee anchoring quality, the effective thickness for hammering into masonry structure is 40~60mm；
The cracking resistance enhancement layer 17 is used to improve the cracking performance of thermal insulation material, by anticracking grout and is located therein alkaline-resisting
Grid cloth composition, 5~8mm of thickness, Specific construction mode are uniformly to brush 2mm on its surface after heat-insulation mortar bed 15 hardening
Anticracking grout, then alkaline-resisting grid cloth and thermal insulation mortar, are further secured to by the alkaline-resisting grid cloth of paving with thermal insulation anchoring member 16
On masonry structure, second of anticracking grout plastering, mortar thickness 3mm are finally carried out；
The decorative layer 18 selects the ornament materials such as ceramic tile or coating by constructional appearance design requirement.
Embodiment 1
The present invention provides a kind of methods using NSM-TRC reinforcing masonry structure, vertically reinforce brick setting with NSM-TRC
For wall, as illustrated in fig. 1 and 2.
(1) slot to ruggedized construction surface: the surface of wall for first treating reinforcing is cleared up, with makita 4100NH along vertical
It slots in horizontal mortar joint direction, takes away groove width 10mm, groove depth 30mm, determine that fluting spacing is wall according to the size of metope
The 1/3 of length.After fluting, groove is rinsed with giant, removes dust and sundries in slot.
(2) prepare fiber knitted net: choosing commercially available Carbon Fibre Textile as reinforcement material, Carbon Fibre Textile thickness
1.5mm, fiber knitted net size of mesh opening 5mm × 5mm.Cutting out width according to the 2/3 of groove depth is 20mm, and length is masonry wall height
Fiber knitted net strip it is several, and by Carbon Fibre Textile immerse epoxide-resin glue in 90 seconds, then take out the carbon fiber volume
Knitmesh is with brush applied 3~5 times repeatedly, until forming one layer of bright film in Carbon Fibre Textile.In epoxide-resin glue
The fine sand of 0.15~0.6mm of partial size is uniformly shed before solidification on Carbon Fibre Textile surface, the amount of shedding is every square metre of volume
1.4kg fine sand is shed in knitmesh, is solidified in air after production 48 hours.
(3) preparation of TRC original concrete: according to cement: flyash: silicon ash: water: fine sand: coarse sand: water-reducing agent=475:
The ratio of 168:35:262:460:920:3.25 prepares TRC original concrete.Wherein cement be strength grade be 42.5 it is common
Portland cement, flyash grade are I grade, and the ratio of mud 0.4, fine sand refers to that 0.15~0.6mm of partial size silica sand, coarse sand refer to that partial size is
0.6~1.2mm silica sand, water-reducing agent are high-efficiency water-reducing agent of poly-carboxylic acid.Feeding sequence is first by silica sand, cement, I grade in whipping process
Flyash and silicon ash successively put into blender and stir 60 seconds, are stirring evenly and then adding into water and water-reducing agent, stir 3 minutes.This matches
Under composition and division in a proportion, actual measurement TRC original concrete 28d compression strength is 52MPa.
(4) bottom TRC original concrete is poured in groove: being soaked with tap water cross-notching region, then whole
The TRC original concrete that a layer thickness is 3mm is uniformly embedded into a line of rabbet joint.
(5) embedded fiber mesh grid: the strip Carbon Fibre Textile prepared is placed on to the middle part of groove, is being woven
The both ends of net apply slight tug and make the direction of fiber knitted net should be parallel with fluting direction, and make its with groove both sides away from
From equal.To ensure subsequent construction, corresponding fixation can be applied inside or outside brick masonry wall, made at fiber knitted net
In tensioned state.
(6) it fills TRC original concrete: TRC original concrete being uniformly filled in the gap of groove with trowel,
According to from the bottom up, the mode from wall side to the other side is filled, and is guaranteed to fill complete and TRC reinforcing layer in slot and be built
Body body structure surface is concordant.After filling, TRC original concrete is slowly plugged and pounded with small trowel, so that in groove
TRC original concrete and fiber knitted net and masonry groove surfaces formed it is good contact, no apparent gap generates, when plugging and pounding
It should be noted that not damaged to fiber knitted net or it being made to generate fold.
(7) processing of body structure surface: removing the fixation of application, will reinforce layer surface with small trowel and smooth out, and remove stream
Out or the TRC original concrete of slot and the foul and sundries on masonry surface are overflowed, maintenance 28 days is then carried out to it.To TRC plus
Gu after layer hardening, mill base or coating preferably being built using permeability and carries out repairing old processing to TRC reinforcing layer, keep building with former
Body structural color is almost the same.
Embodiment 2
The present invention provides a kind of methods using NSM-TRC reinforcing masonry structure, with NSM-TRC horizontal reinforcing brick setting
For wall, as shown in Figures 3 and 4.
(1) slot to ruggedized construction surface: the wall piece surface for first treating reinforcing is cleared up, with professional groover along horizontal
Mortar joint direction fluting, groove width takes original structure horizontal mortar joint width for 12mm, groove depth 40mm, true according to the size of metope
Surely fluting spacing is the 1/4 of wall length.After fluting, groove is rinsed with giant, removes mortar clast and ash in slot
Dirt.
(2) prepare fiber knitted net: choosing commercially available Carbon Fibre Textile as reinforcement material, Carbon Fibre Textile thickness
1.0mm, fiber knitted net size of mesh opening 5mm × 5mm.Cutting out width according to the 2/3 of groove depth is 27mm, and length is the fibre of wall width
It is several to tie up mesh grid strip, impregnation then is carried out to the Carbon Fibre Textile and glutinous sand is handled, it is solid in air after production
Change 48 hours.
(3) remaining step is the same as embodiment 1.
The present embodiment 2 is the difference from embodiment 1 is that NSM-TRC reinforcement orientation is to reinforce, open along horizontal mortar joint fluting
Groove width is original structure horizontal mortar joint width, remaining step is same as Example 1.
Embodiment 3
Present embodiments provide a kind of compound masonry structure that this method obtains, as viewed in figures 5-8, including from inside to outside according to
Secondary is inside mortar levelling layer 11, NSM-TRC reinforcing layer 12, masonry structure 13, NSM-TRC reinforcing layer 12, outside mortar levelling
Layer 14, heat-insulation mortar bed 15, thermal insulation mortar anchoring piece 16, cracking resistance enhancement layer 17, decorative layer 18, thermal insulation anchoring member 16 is distributed in anti-
It splits in enhancement layer 17, sequentially passes through alkaline-resisting grid cloth in cracking resistance enhancement layer 17, heat-insulation mortar bed 15, outside mortar levelling layer 14
Until inside masonry structure 13.
Masonry structure 13 is built by Structural Design Requirement, after it reaches acceptance criteria, first to the wall laid
Surface is cleared up, and is then slotted along perpendicular to horizontal mortar joint direction, is taken away groove width 10mm, groove depth 30mm, according to wall
The size in face determines that fluting spacing is the 1/3 of wall length, after fluting, is rinsed with giant to groove, removes impurity removing；Choosing
It takes Carbon Fibre Textile as reinforcement material, cuts out width according to the 2/3 of groove depth and be the fiber knitted net strip of 20mm, and use ring
Oxygen resin glue brushes it, uniformly sheds the fine sand that a little partial size is 0.15~0.6mm, system in fiber woven net surface
Solidify in air after work 24 hours, and according to: cement: flyash: silicon ash: water: fine sand: coarse sand: water-reducing agent=475:
168:35:262:460:920:3.25 ratio prepare fine concrete；It is soaked with tap water cross-notching region, entire
Bottom portion of groove uniformly pours the fine concrete that a layer thickness is 2~3mm, the fibre strip mesh grid prepared is placed on recessed
Then the gap between mesh grid and groove is uniformly filled at the middle part of slot with fine concrete, in the way of from the bottom up into
Row filling guarantees that filling is complete in slot；After filling, fine concrete is slowly plugged and pounded with small trowel, so that recessed
Fine concrete in slot and fiber knitted net and masonry groove surfaces formed it is good contact, no apparent gap generates, by
This complete NSM-TRC reinforcing layer 12；After reinforcing layer hardening, inside mortar levelling layer 14 is made using 1:3 cement mortar, it is levelling
Thickness degree 4mm hardens uniform brushing adhesive polystyrene granule heat-insulating mortar 15, thermal insulation mortar thickness 30mm to screed-coat；Sand to be kept the temperature
2mm anticracking grout is uniformly brushed on its surface after starch, then the alkaline-resisting grid cloth of paving, with thermal insulation anchoring member 16 by grid cloth
It is further secured on masonry structure with thermal insulation mortar, finally carries out second of anticracking grout plastering, mortar thickness 3mm, to it
Cracking resistance enhancement layer 17 is completed after hardening, with a thickness of 5mm；Decorative layer 18 finally is set in metope, ceramic tile can be used in decorative layer 18
Or the ornament materials such as coating.
The thermal insulation mortar anchoring piece 16 keeps the temperature fixing bolt, and anchoring piece is distributed in cracking resistance enhancement layer 17 in matrix form
Interior, every square metre of quantity is 4；The effective thickness that anchoring piece hammers into masonry structure is 40mm；
Described is construction and connection type on the outside of composite construction, obtains NSM-TRC by above-mentioned construction method on the inside of structure and adds
Gu layer 12, the cement in mass ratio after its hardening: flyash: sand=2:1:3 production inside cement mortar screeding layer 11 is thick
Spend 5mm~10mm.
From above embodiment it will be seen that the new method for the NSM-TRC reinforcing masonry structure that the present invention uses, has
The processing for reducing masonry structure surface of effect, hardly increases the sectional dimension and self weight of original structure after reinforcing, build improving
While the mechanical property of body structure, the original style and features and aesthetics of building can be maintained, traditional reinforced masonry wall mode is compensated for
There are the problem of.TRC reinforcing layer uses inorganic gel using with the preferable high strength fibre mesh grid of corrosion resistance
Material is bonded, and without additional protective layer, is effectively overcome currently most used surface mount FRP and steel mesh etc. and is added
Gu the shortcomings that material.The effects of TRC is embedded in inside masonry, can be avoided well because of external world's abrasion, shock is to TRC reinforcing layer
It destroys, service life with higher.Meanwhile NSM-TRC arrangement is flexible, wants when can meet different direction orientation enhancing
It asks, the reinforcement for being particularly suitable for Local Damaged masonry structure is reinforced.
The present invention does not address place and is suitable for the prior art.
Claims (5)
1. a kind of method using NSM-TRC reinforcing masonry structure, it is characterized in that method includes the following steps:
(1) it slots to ruggedized construction surface: treating reinforcing masonry structure surface and cleared up, along horizontal mortar joint direction fluting or edge
Vertical-horizontal mortar joint direction fluting；Wherein groove width can select 8 ~ 15mm according to the actual conditions to reinforcing masonry structure, open
Groove depth selects 25mm ~ 40mm, and fluting spacing takes 1/3 ~ 1/4 along fluting direction wall length, and slotting length takes away slot direction wall
Overall length；
(2) prepare fiber knitted net: the fiber knitted net being woven into using high strength fibre, fibrage 1 ~ 2mm of thickness of net is fine
Mesh grid size of mesh opening 5mm × 5mm is tieed up, fiber knitted net width takes the 2/3 of groove depth；It will be cut to the fiber knitted net leaching of strip
Enter in epoxide-resin glue 1 ~ 2 minute, take out the fiber knitted net brush applied 3 ~ 5 times, shed on it one layer 0.15 ~
The fine sand of 0.6mm, the amount of shedding are that 1.2 ~ 1.6kg fine sand is shed in every square metre of mesh grid, then is solidified 24 ~ 48 hours in air,
For use；
(3) preparation of TRC original concrete: TRC original concrete ingredient includes cement, silica sand and water；The grain of the silica sand
Diameter is the silica sand of 0.15 ~ 1.2mm；
(4) bottom TRC original concrete is poured in groove: being soaked with tap water cross-notching region, after the completion of soaking, clearly
Except water and dirt extra in groove, TRC original concrete then is poured in bottom portion of groove；TRC original concrete thickness 2 ~
3mm；
(5) fibre strip mesh grid obtained in step (2) embedded fiber mesh grid: is placed on to the middle part of groove；
(6) it fills TRC original concrete: TRC original concrete being uniformly filled in the gap of groove with trowel；
(7) processing of body structure surface: after completing step (6), layer surface will be reinforced with small trowel and will be smoothed out, outflow is removed or overflows
The TRC original concrete of slot and the foul and sundries on masonry surface；After the hardening of TRC reinforcing layer, using building mill base or painting
Material coats TRC reinforcing area, obtains the NSM-TRC reinforcing masonry structure.
2. the method for using NSM-TRC reinforcing masonry structure as described in claim 1, it is characterized in that described to Strengthened Masonry Walls
Structure is brick masonry structure made of brick and masonry mortar masonry；Especially with the ancient building of the structure.
3. the method for using NSM-TRC reinforcing masonry structure as described in claim 1, it is characterized in that in the step (2)
High strength fibre be carbon fiber, basalt fibre or carbon-glass combined filament.
4. the method for using NSM-TRC reinforcing masonry structure as described in claim 1, it is characterized in that the TRC matrix is mixed
Solidifying soil preferred mass proportion is cement: I grade of flyash: silicon ash: water: fine sand: coarse sand: water-reducing agent=475:168:35:262:460:
920:3.25；The fine sand refers to that 0.15 ~ 0.6mm of partial size silica sand, coarse sand refer to that partial size is 0.6 ~ 1.2mm silica sand；The diminishing
Agent is specially high-efficiency water-reducing agent of poly-carboxylic acid；First by silica sand, cement, I grade of flyash and silicon ash successively put into blender stirring 30 ~
60 seconds, water and water-reducing agent are added, stirs 2 ~ 3 minutes, obtains TRC original concrete.
5. a kind of compound masonry structure, it is characterized in that the structure be followed successively by from inside to outside inside mortar levelling layer, masonry structure,
NSM-TRC reinforcing layer, outside mortar levelling layer, heat-insulation mortar bed, cracking resistance enhancement layer, decorative layer；Thermal insulation anchoring member is distributed in anti-
It splits in enhancement layer, sequentially passes through alkaline-resisting grid cloth in cracking resistance enhancing, heat-insulation mortar bed, outside mortar levelling layer until masonry knot
Inside structure；
The NSM-TRC reinforcing layer is located on masonry structure, wide along horizontal mortar joint direction fluting or along vertical-horizontal mortar joint direction
Degree is 8 ~ 15mm, and depth is 25mm ~ 40mm, and fluting spacing takes 1/3 ~ 1/4 along fluting direction wall length, and length takes away slot direction
The overall length of wall；Material is using high-performance fine concrete as matrix, and fiber knitted net is arranged in centre；
The inside cement mortar screeding thickness degree 5mm ~ 10mm;
The masonry structure is brick masonry structure made of being built as brick and masonry mortar；
The outside cement mortar screeding layer with a thickness of 3 ~ 5mm；
Heat-insulation mortar bed is adhesive polystyrene granule heat-insulating mortar, 20 ~ 40mm of insulation layer thickness；
The thermal insulation mortar anchoring piece is bolt or screw, is distributed in cracking resistance enhancement layer in matrix form, every square metre of anchoring
Number of packages amount is 4 ~ 5；The effective thickness that anchoring piece hammers into masonry structure is 40 ~ 60mm；
The cracking resistance enhancement layer is made of anticracking grout and the alkaline-resisting grid cloth being located therein, 5 ~ 8mm of thickness；
The decorative layer is ceramic tile or coating.
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| CN115726599A (en) * | 2022-12-06 | 2023-03-03 | 江苏海洋大学 | Method for additionally arranging masonry wall constructional column by embedding fiber rod |
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