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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 PDF

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Publication number
CN109138490A
CN109138490A CN201811297215.9A CN201811297215A CN109138490A CN 109138490 A CN109138490 A CN 109138490A CN 201811297215 A CN201811297215 A CN 201811297215A CN 109138490 A CN109138490 A CN 109138490A
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trc
masonry
masonry structure
layer
nsm
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田稳苓
李鑫波
彭佳斌
李子祥
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Hebei University of Technology
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Hebei University of Technology
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements

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  • 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

本发明为一种采用NSM‑TRC加固砌体结构的方法及其砌体。该方法为一种在砌体结构表面嵌入纤维编织网增强混凝土(NSM‑TRC)的砌体结构加固新方法,通过在砌体结构表面开槽,然后将TRC嵌入、粘结到凹槽内部,使得两者成为一个整体的砌体结构加固新方法。本发明可减少砌体结构表面的处理,在提高结构承载能力的同时,能较好保护古建筑的原始风貌和美观性,加固后几乎不增加原结构的截面尺寸和自重,特别适合国内外古建筑及局部受损砌体结构的加强加固。此外,TRC的制作成本较钢筋、钢筋网、FRP基底胶凝材料等具有很大的优势,其施工方式无污染,符合国家推广节约资源,经济、高效的新型建筑材料的要求。

The present invention relates to a method for strengthening masonry structure by using NSM-TRC and its masonry. The method is a new method for strengthening masonry structures by embedding fiber woven mesh reinforced concrete (NSM‑TRC) on the surface of the masonry structure. It is a new method of masonry structure reinforcement that makes the two into a whole. The invention can reduce the surface treatment of the masonry structure, improve the bearing capacity of the structure, and can better protect the original style and aesthetics of the ancient building. Reinforcement of buildings and partially damaged masonry structures. In addition, the production cost of TRC has great advantages over steel bars, steel meshes, and FRP-based cementitious materials.

Description

A kind of method and its masonry using NSM-TRC reinforcing masonry structure
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)

1.一种采用NSM-TRC加固砌体结构的方法,其特征为该方法包括以下步骤:1. a method of adopting NSM-TRC to reinforce masonry structure is characterized in that the method comprises the following steps: (1)待加固结构表面开槽:对待加固砌体结构表面进行清理,沿水平灰缝方向开槽或沿垂直水平灰缝方向开槽;其中开槽宽度可根据待加固砌体结构的实际情况选择8~15mm,开槽深度选择25mm~40mm,开槽间距取沿开槽方向墙长度的1/3~1/4,开槽长度取开槽方向墙的全长;(1) Slotting on the surface of the structure to be reinforced: Clean the surface of the masonry structure to be reinforced, and slot along the direction of the horizontal ash joint or along the direction of the vertical horizontal ash joint; the width of the slot can be based on the actual situation of the masonry structure to be reinforced Select 8~15mm, select 25mm~40mm for the slotting depth, take 1/3~1/4 of the length of the wall along the slotting direction, and take the full length of the wall in the slotting direction; (2)准备纤维编织网:采用高强度纤维纺织成的纤维编织网,纤维编织网厚度1~2mm,纤维编织网网格尺寸5mm×5mm,纤维编织网宽度取槽深的2/3;将裁剪为条状的纤维编织网浸入环氧树脂胶中1~2分钟,取出该纤维编织网用刷子抹匀3~5次,在其上抛洒一层0.15~0.6mm的细砂,抛洒量为每平方米编织网抛洒1.2~1.6kg细砂,再在空气中固化24~48小时,待用;(2) Prepare a fiber woven net: a fiber woven net made of high-strength fibers, the fiber woven net thickness is 1~2mm, the fiber woven net mesh size is 5mm × 5mm, and the fiber woven net width is 2/3 of the groove depth; The fiber woven net cut into strips is immersed in epoxy resin glue for 1 to 2 minutes, and the fiber woven net is taken out and wiped evenly with a brush for 3 to 5 times. Sprinkle 1.2~1.6kg of fine sand per square meter of woven net, and then solidify in the air for 24~48 hours before use; (3)TRC基体混凝土的制备:TRC基体混凝土成分包括水泥、硅砂和水;所述的硅砂的粒径为0.15~1.2mm的硅砂;(3) Preparation of TRC matrix concrete: The components of TRC matrix concrete include cement, silica sand and water; the silica sand has a particle size of 0.15~1.2mm; (4)在凹槽内浇筑底层TRC基体混凝土:用自来水对开槽区域进行浸湿,浸湿完成后,清除凹槽内多余的水和泥垢,然后在凹槽底部浇筑TRC基体混凝土;TRC基体混凝土厚度在2~3mm;(4) Pour the bottom TRC base concrete in the groove: soak the grooved area with tap water, after the soaking is completed, remove the excess water and dirt in the groove, and then pour the TRC base concrete at the bottom of the groove; TRC base The thickness of concrete is 2~3mm; (5)嵌入纤维编织网:将步骤(2)中得到的条状纤维编织网放置在凹槽的的中部;(5) Embedding the fiber woven mesh: placing the strip-shaped fiber woven mesh obtained in step (2) in the middle of the groove; (6)填充TRC基体混凝土:用泥刀将TRC基体混凝土均匀的填充到凹槽的空隙当中;(6) Filling the TRC base concrete: Use a trowel to evenly fill the TRC base concrete into the gap of the groove; (7)结构表面的处理:完成步骤(6)之后,用小泥刀将加固层表面抹平,清除流出或溢出槽的TRC基体混凝土和砌体表面的脏物和杂物;在TRC加固层硬化之后,采用建筑色浆或涂料对TRC加固区域进行涂覆,得到所述的的NSM-TRC加固砌体结构。(7) Treatment of the structural surface: After completing step (6), use a small trowel to smooth the surface of the reinforcement layer to remove the dirt and debris on the surface of the TRC matrix concrete and masonry that flow out or overflow the groove; After hardening, the TRC reinforced area is coated with architectural color paste or paint to obtain the described NSM-TRC reinforced masonry structure. 2.如权利要求1所述的采用NSM-TRC加固砌体结构的方法,其特征为所述的待加固砌体结构为砖块与砌筑砂浆砌筑而成的砖砌体结构;特别是采用该结构的古建筑。2. the method for adopting NSM-TRC to reinforce masonry structure as claimed in claim 1, it is characterized in that described masonry structure to be reinforced is the brick masonry structure that bricks and masonry mortar are built; especially Ancient buildings with this structure. 3.如权利要求1所述的采用NSM-TRC加固砌体结构的方法,其特征为所述的步骤(2)中的高强度纤维为碳纤维、玄武岩纤维或碳-玻混纤维。3 . The method for reinforcing masonry structures using NSM-TRC according to claim 1 , wherein the high-strength fibers in the step (2) are carbon fibers, basalt fibers or carbon-glass mixed fibers. 4 . 4.如权利要求1所述的采用NSM-TRC加固砌体结构的方法,其特征为所述的TRC基体混凝土优选质量配比为水泥:Ⅰ级粉煤灰:硅灰:水:细砂:粗砂:减水剂=475:168:35:262:460:920:3.25;所述的细砂指粒径0.15~0.6mm硅砂、粗砂指粒径为0.6~1.2mm硅砂;所述的减水剂具体为聚羧酸高效减水剂;先将硅砂、水泥、Ⅰ级粉煤灰和硅灰依次投入搅拌机中搅拌30~60秒,再加入水和减水剂,搅拌2~3分钟,得到TRC基体混凝土。4. the method that adopts NSM-TRC to strengthen masonry structure as claimed in claim 1, it is characterized in that described TRC matrix concrete preferred mass ratio is cement: Ⅰ grade fly ash: silica fume: water: fine sand: Coarse sand: water reducing agent = 475:168:35:262:460:920:3.25; the fine sand refers to silica sand with a particle size of 0.15~0.6mm, and the coarse sand refers to silica sand with a particle size of 0.6~1.2mm; The water reducing agent is specifically polycarboxylate superplasticizer; first put the silica sand, cement, grade I fly ash and silica fume into the mixer and stir for 30~60 seconds, then add water and water reducing agent, and stir for 2~3 minutes , to obtain TRC matrix concrete. 5.一种复合砌体结构,其特征为该结构从内到外依次为内侧砂浆找平层、砌体结构、NSM-TRC加固层、外侧砂浆找平层、保温砂浆层、抗裂增强层、装饰层;保温锚固件分布在抗裂增强层内,依次穿过抗裂增强中的耐碱网格布、保温砂浆层、外侧砂浆找平层直至砌体结构内部;5. A composite masonry structure, characterized in that the structure consists of an inner mortar leveling layer, a masonry structure, an NSM-TRC reinforcement layer, an outer mortar leveling layer, a thermal insulation mortar layer, an anti-cracking reinforcement layer, a decoration layer from the inside to the outside. The thermal insulation anchors are distributed in the anti-crack reinforcement layer, and pass through the alkali-resistant mesh cloth in the anti-crack reinforcement layer, the thermal insulation mortar layer, and the outer mortar leveling layer until the inside of the masonry structure; 所述NSM-TRC加固层位于砌体结构上,沿水平灰缝方向开槽或沿垂直水平灰缝方向,宽度为8~15mm,深度为25mm~40mm,开槽间距取沿开槽方向墙长度的1/3~1/4,长度取开槽方向墙的全长;材质为以高性能细骨料混凝土为基体,中间配设纤维编织网;The NSM-TRC reinforcement layer is located on the masonry structure, and is slotted along the direction of the horizontal ash joint or along the direction of the vertical horizontal plaster joint, the width is 8~15mm, the depth is 25mm~40mm, and the slot spacing is the wall length along the slotting direction. 1/3~1/4 of the wall, the length is the full length of the wall in the slotting direction; the material is based on high-performance fine aggregate concrete, with a fiber woven mesh in the middle; 所述内侧水泥砂浆找平层厚度5mm~10mm;The thickness of the inner cement mortar leveling layer is 5mm~10mm; 所述砌体结构为由砖块与砌筑砂浆砌筑而成的砖砌体结构;The masonry structure is a brick masonry structure built with bricks and masonry mortar; 所述外侧水泥砂浆找平层的厚度为3~5mm;The thickness of the outer cement mortar leveling layer is 3-5mm; 保温砂浆层为胶粉聚苯颗粒保温砂浆,保温层厚度20~40mm;The thermal insulation mortar layer is rubber powder polystyrene particle thermal insulation mortar, and the thickness of the thermal insulation layer is 20~40mm; 所述保温砂浆锚固件为螺栓或螺钉,呈矩阵形式分布在抗裂增强层内,每平方米锚固件数量为4~5个;锚固件钉入砌体结构的有效厚度为40~60mm;The thermal insulation mortar anchors are bolts or screws, which are distributed in the anti-crack reinforcement layer in a matrix form, and the number of anchors per square meter is 4 to 5; the effective thickness of the anchors nailed into the masonry structure is 40 to 60 mm; 所述的抗裂增强层由抗裂砂浆和位于其中的耐碱网格布组成,厚度5~8mm;The anti-crack reinforcement layer is composed of anti-crack mortar and alkali-resistant mesh cloth located therein, with a thickness of 5-8 mm; 所述装饰层为瓷砖或涂料。The decorative layer is ceramic tile or paint.
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