CN104328924B - Reinforced concrete structure part method is carried out with fiber mesh muscle and early strong strength self-compaction mortar - Google Patents
Reinforced concrete structure part method is carried out with fiber mesh muscle and early strong strength self-compaction mortar Download PDFInfo
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Abstract
The present invention relates to the method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar, first, removing is reinforced concrete structure surface floating dust and loosening particle, then carries out cutting process, then removes concrete dust and soaks; Then the concrete structure of above-mentioned process is smeared or be injected in the early strong strength self-compaction mortar be stirred in advance on the surface, early strong strength self-compaction mortar thickness exceeds the concrete structure surface of above-mentioned process; Again fiber mesh muscle is laid on early strong strength self-compaction mortar; Finally by the early strong strength self-compaction mortar uniform application be stirred in advance or be injected into fiber mesh muscle surface, ensure that early strong strength self-compaction mortar uniform fold is lived fiber mesh muscle and exceeds its height.Construction technology of the present invention improves the fractue spacing of concrete structure and the expansion of control critical eigenvalue effectively, improves the rigidity of structure, bearing capacity and durability, can be widely used for the reinforcing of the bending resistance of all types of concrete structure, shearing resistance, resistance to compression and antidetonation.
Description
Technical field
The invention belongs to building structure strengthening field, relate to and carry out reinforced concrete structure part method with fiber mesh muscle and early strong strength self-compaction mortar.
Background technology
DFG proposed fiber knitted net Concrete Structure (Textile Reinforced Concrete is called for short TRC) and reinforces concrete structure in 1999.TRC is the combination of multiaxis fiber knitted net and fine concrete, fiber knitted net mainly adopts carbon fiber and alkali-resistant glass fibre, fine concrete is the concrete that aggregate size is very little, mainly become as material compositions such as cement, silicon ash, flyash and sand, there is good flowing, infiltration, bonding, water conservation and endurance quality.But, research institution also points out oneself, under certain stress, because the shear stress on interface of TRC back-up coat and former component is greater than interfacial adhesion, thus cause interface delaminating damage, and then can not effectively ensure back-up coat and be reinforced the cooperative bearing between component.
Chinese patent ZL2009100102593 patent discloses one fiber knitted net and the concrete method of cement-based material reinforcement and strengthening, disclose to prevent interfacial failure, at back-up coat and be reinforced between component and add U-shaped shearing resistance pin, effectively can prevent interface delaminating damage, this can cause secondary damage to concrete structure.In addition, in order to prevent fibre from producing slippage, this patent adopts epoxy resin impregnated fiber woven net, and this causes the resistance to elevated temperatures of this patent not enough.In addition, this patent adopts fine concrete as cementing agent, and curing time is longer, and early epistasis can be not enough, can not realize the rapid reinforcement to concrete structure.
Solid method is early forced in a kind of tunnel based on fast solidifying composite mortar and fiber knitted net that patent discloses of Chinese patent CN103498683A, discloses and adopts fiber knitted net and fast solidifying composite mortar to the reinforcing of tunnel lining.The initial setting time of the fast solidifying composite mortar of the method is less than 3 minutes, can be too short for the time of constructing operation, and need special stirring injection apparatus, execution conditions are harsh.In addition, this patent adopts fiber knitted net as reinforcing rib, can only be applied to the anti-bend reinforced of concrete structure, and in application, fibre may produce slippage simultaneously, causes fiber high-strength degree characteristic to can not get utilizing fully.
Summary of the invention
The goal of the invention of the application is to provide one fiber mesh muscle and early strong strength self-compaction mortar carrys out reinforced concrete structure part method, which overcomes the defect in existing method.
In order to complete the goal of the invention of the application, the application by the following technical solutions:
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein:
(1) removing is reinforced concrete structure surface floating dust and loosening particle, then carries out cutting process, groove depth 2mm ~ 10mm, groove width 1mm ~ 5mm, separation 5mm ~ 50mm, then removes concrete dust and soak;
(2) concrete structure of above-mentioned process is smeared or be injected in the early strong strength self-compaction mortar be stirred in advance on the surface, the concrete structure surface that early strong strength self-compaction mortar thickness exceeds above-mentioned process is 2 ~ 5mm;
(3) fiber mesh muscle is laid on early strong strength self-compaction mortar;
(4) by the early strong strength self-compaction mortar uniform application be stirred in advance or be injected into fiber mesh muscle surface, ensureing that early strong strength self-compaction mortar uniform fold is lived fiber mesh muscle and exceeded it is highly 2 ~ 5mm;
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: the method also comprises: according to the fastening strength being reinforced concrete structure, repeat the step (3) in claim 1 and (4), lay 2-5 layer fiber mesh muscle;
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: described early strong strength self-compaction mortar is by potassium dihydrogen phosphate, magnesia, flyash, silicon ash, graded sand, retarding agent, expansion agent, fibre and water composition, the weight proportion of each component is potassium dihydrogen phosphate: magnesia: flyash: silicon ash: graded sand: retarding agent: expansion agent: fibre: water=0.05 ~ 0.15:0.10 ~ 0.30:0.10 ~ 0.50:0.10 ~ 0.50:0.20 ~ 0.40:0.005 ~ 0.0.008:0.002 ~ 0.005:0.001 ~ 0.005:0.15 ~ 0.25, the particle diameter of graded sand is 0.01mm ~ 2.0mm,
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: described fiber mesh muscle is interconnected by some transverse fiber muscle and some longitudinal fiber muscle and forms, parallel to each other between transverse fiber muscle, parallel to each other between longitudinal fiber muscle, transverse fiber muscle is mutually vertical with the longitudinal fiber muscle be attached thereto, spacing between adjacent transverse fiber muscle and between adjacent longitudinal fiber muscle is respectively 1cm to 20cm, and the cross-sectional area of single transverse fiber muscle and single longitudinal fiber muscle is respectively 30mm
2to 100mm
2;
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: between described transverse fiber muscle or the material of longitudinal fiber muscle be carbon fiber, glass fiber, aramid fiber or basalt fibre;
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: the transverse fiber muscle of described fiber mesh muscle or longitudinal fiber muscle use identical or different material to make;
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: adopt high pressure air rifle or hydraulic giant removing to be reinforced concrete structure surface in step (1) and drift along and loosen particle, adopt gaining machine to carry out cutting process.
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: the initial setting time of described early strong strength self-compaction mortar is 10-30 minute, under natural conditions, maintenance is after 2 ~ 10 hours, and cubic compressive strength reaches 20 ~ 60Mpa;
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: described concrete structure is concrete beam, concrete slab or concrete column.
A kind of fiber mesh muscle of the present invention and early strong strength self-compaction mortar carry out the method for reinforced concrete structure part, wherein: described reinforcing for be bending resistance to concrete structure, shearing resistance, resistance to compression is or/and the reinforcing carried out of shock strength.
Compared with the patent of existing Chinese patent CN103498683A, the application has the following advantages:
1. method of the present invention is different from the material used in the method for Chinese patent CN103498683A, what in Chinese patent CN103498683A, reinforcement material used is fiber knitted net, fiber knitted net is flexible, it can only bear pulling force, but pressure and shearing force can not be born, therefore can only carry out anti-bend reinforced;
2. method of the present invention from the method for Chinese patent CN103498683A use mortar different, and then setting time is different with operable time, the initial setting time of the fast solidifying composite mortar used in Chinese patent CN103498683A is about 3 minutes, the operable time of fast solidifying composite mortar is extremely short, is unfavorable for reinforcing large-sized concrete structural member;
3. method of the present invention is different from the object that the method for Chinese patent CN103498683A is reinforced, purposes is different, the reinforcement means of Chinese patent CN103498683A, the object that can only be used for resisting under tension state carries out reinforcing as Strengthening Tunnel, to control the crackle in tunnel and to strengthen resistance to corrosion etc., and method of the present invention not only may be used for the object resisted under tension state and reinforces, also may be used for reinforcing object under shearing resistance, bending resistance, resistance to compression and antidetonation state;
4. method of the present invention according to fastening strength, can lay multi-layer fiber grid muscle.
5. the present invention with fiber mesh muscle as armature, early strong strength self-compaction mortar is as cementing agent, realized the reinforcing of concrete structure by the condensation of early strong strength self-compaction mortar, effectively can overcome the fibre slippage in fiber knitted net reinforcement means and the shortcoming causing fibrous material to be not fully utilized; Cutting process is carried out to being reinforced concrete structure surface, compared with the dabbing processing mode of conventional interface, effectively can improve the adhesive property at interface, with employing staple anchoring back-up coat be reinforced compared with Component, can effectively avoid because anchoring punching being reinforced secondary damage that component causes; Adopt early strong strength self-compaction mortar as cementing agent, fire line is better than fiber cloth reinforced, and compared with existing reinforcing technique, back-up coat curing time sharply reduces.Meanwhile, construction technology of the present invention is simple, easy to operate, effectively can improve the fractue spacing of concrete structure and the expansion of control critical eigenvalue, improves the rigidity of structure, bearing capacity and durability, is applicable to urgent consolidation and the repairing of all kinds structure.
Detailed description of the invention
The method that the present invention's fiber mesh muscle and early strong strength self-compaction mortar carry out reinforced concrete structure part comprises following:
(1) adopt high pressure air rifle or hydraulic giant removing to be reinforced concrete structure surface drift along and loosen particle, adopt gaining machine to carry out cutting process, groove depth 2mm ~ 10mm, groove width 1mm ~ 5mm, separation 5mm ~ 50mm, then remove concrete dust also wetting;
(2) concrete structure of above-mentioned process is smeared or be injected in the early strong strength self-compaction mortar be stirred in advance on the surface, the concrete structure surface that early strong strength self-compaction mortar thickness exceeds above-mentioned process is 2 ~ 5mm, early strong strength self-compaction mortar is by potassium dihydrogen phosphate, magnesia, flyash, silicon ash, graded sand, retarding agent, expansion agent, fibre and water composition, the weight proportion of each component is potassium dihydrogen phosphate: magnesia: flyash: silicon ash: graded sand: retarding agent: expansion agent: fibre: water=0.05 ~ 0.15:0.10 ~ 0.30:0.10 ~ 0.50:0.10 ~ 0.50:0.20 ~ 0.40:0.005 ~ 0.0.008:0.002 ~ 0.005:0.001 ~ 0.005:0.15 ~ 0.25, the particle diameter of graded sand is 0.01mm ~ 2.0mm, its initial setting time is 10-30 minute, , under natural conditions, maintenance 2 ~ 10 hours cubic compressive strength standard values are 20 ~ 60MPa,
(3) fiber mesh muscle is laid on early strong strength self-compaction mortar, fiber mesh muscle is interconnected by some transverse fiber muscle and some longitudinal fiber muscle and forms, parallel to each other between transverse fiber muscle, parallel to each other between longitudinal fiber muscle, transverse fiber muscle is mutually vertical with the longitudinal fiber muscle be attached thereto, spacing between adjacent transverse fiber muscle and between adjacent longitudinal fiber muscle is respectively 1cm to 20cm, and the cross-sectional area of single transverse fiber muscle and single longitudinal fiber muscle is respectively 30mm
2to 100mm
2, between transverse fiber muscle or the material of longitudinal fiber muscle be carbon fiber, glass fiber, aramid fiber or basalt fibre, the transverse fiber muscle of fiber mesh muscle or longitudinal fiber muscle use identical or different material to make;
(4) by the early strong strength self-compaction mortar uniform application be stirred in advance or be injected into fiber mesh muscle surface, ensureing that early strong strength self-compaction mortar uniform fold is lived fiber mesh muscle and exceeded it is highly 2 ~ 5mm, if reach fastening strength, just complete reinforcement criteria, reinforcement means terminates at this point; If do not reach fastening strength, continue step (5);
(5) repeat step (3) and (4), lay 2-5 layer fiber mesh muscle.Until reach fastening strength.
Early strong strength self-compaction mortar is not limited to above-mentioned formula and proportioning, as long as meet reinforce adhesive property, having early epistasis can the mortar of (as: curing time be less than 10 hours after, cubic compressive strength can reach 20 ~ 60Mpa) and fire resistance (refractory temperature is greater than conventional fire) or cementing agent.Concrete structure is concrete beam, concrete slab or concrete column.Described reinforcing for be bending resistance to concrete structure, the reinforcing carried out of shearing resistance or compressive strength.Meanwhile, also effectively improve shock strength.
More than describing is explanation of the invention, and be not the restriction to invention, limited range of the present invention is see claim, and when without prejudice to spirit of the present invention, the present invention can do any type of amendment.
Claims (8)
1. carry out a method for reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar, it is characterized in that:
(1) removing is reinforced concrete structure surface floating dust and loosening particle, then carries out cutting process, groove depth 2mm ~ 10mm, groove width 1mm ~ 5mm, separation 5mm ~ 50mm, then removes concrete dust and soak;
(2) concrete structure of above-mentioned process is smeared or be injected in the early strong strength self-compaction mortar be stirred in advance on the surface, the concrete structure that early strong strength self-compaction mortar thickness exceeds above-mentioned process is 2 ~ 5mm on the surface;
(3) fiber mesh muscle is laid on early strong strength self-compaction mortar;
(4) by the early strong strength self-compaction mortar uniform application be stirred in advance or be injected into fiber mesh muscle surface, ensureing that early strong strength self-compaction mortar uniform fold is lived fiber mesh muscle and exceeded it is highly 2 ~ 5mm;
(5) according to the fastening strength being reinforced concrete structure, repeat step (3) and (4), lay 2-5 layer fiber mesh muscle;
Described early strong strength self-compaction mortar is made up of potassium dihydrogen phosphate, magnesia, flyash, silicon ash, graded sand, retarding agent, expansion agent, fibre and water, the weight proportion of each component is potassium dihydrogen phosphate: magnesia: flyash: silicon ash: graded sand: retarding agent: expansion agent: fibre: water=0.05 ~ 0.15:0.10 ~ 0.30:0.10 ~ 0.50:0.10 ~ 0.50:0.20 ~ 0.40:0.005 ~ 0.008:0.002 ~ 0.005:0.001 ~ 0.005:0.15 ~ 0.25, the particle diameter of graded sand is 0.01mm ~ 2.0mm.
2. the method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar as claimed in claim 1, it is characterized in that: described fiber mesh muscle is interconnected by some transverse fiber muscle and some longitudinal fiber muscle and forms, parallel to each other between transverse fiber muscle, parallel to each other between longitudinal fiber muscle, transverse fiber muscle is mutually vertical with the longitudinal fiber muscle be attached thereto, spacing between adjacent transverse fiber muscle and between adjacent longitudinal fiber muscle is respectively 1cm to 20cm, and the cross-sectional area of single transverse fiber muscle and single longitudinal fiber muscle is respectively 30mm
2to 100mm
2.
3. the method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar as claimed in claim 2, is characterized in that: described transverse fiber muscle or the material of longitudinal fiber muscle are carbon fiber, glass fiber, aramid fiber or basalt fibre.
4. the method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar as claimed in claim 3, is characterized in that: the transverse fiber muscle of described fiber mesh muscle or longitudinal fiber muscle use identical or different material to make.
5. the method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar as claimed in claim 1, it is characterized in that: adopt high pressure air rifle or hydraulic giant removing to be reinforced concrete structure surface floating dust and loosening particle in step (1), adopt gaining machine to carry out cutting process.
6. the method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar as claimed in claim 1, it is characterized in that: the initial setting time of described early strong strength self-compaction mortar is 10-30 minute, under natural conditions, maintenance is after 2 ~ 10 hours, and cubic compressive strength reaches 20 ~ 60MPa.
7. the method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar as claimed in claim 1, is characterized in that: described concrete structure is concrete beam, concrete slab or concrete column.
8. the as claimed in claim 1 method carrying out reinforced concrete structure part with fiber mesh muscle and early strong strength self-compaction mortar, is characterized in that: described reinforcing for be bending resistance to concrete structure, the reinforcing carried out of shearing resistance or compressive strength.
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| CN104609825B (en) * | 2015-02-05 | 2016-09-28 | 泉州三欣新材料科技有限公司 | A kind of heat-insulation and heat-preservation inorganic coating and preparation method thereof |
| CN106930550A (en) * | 2015-12-30 | 2017-07-07 | 卡本复合材料（天津）有限公司 | A kind of carbon fiber mesh reinforcement means |
| CN107032675A (en) * | 2017-04-12 | 2017-08-11 | 北京建筑大学 | A kind of reinforced cementitious based composites of basalt fibre and preparation method thereof |
| CN109694231B (en) * | 2019-02-22 | 2021-11-05 | 山东创能机械科技有限公司 | Phosphorus-magnesium-based cement guniting material and preparation method and application thereof |
| CN110206333A (en) * | 2019-06-13 | 2019-09-06 | 卡本科技集团股份有限公司 | A kind of carbon fiber mesh is used to reinforce the method and RC two-way slab of RC two-way slab |
| CN110952996B (en) * | 2019-09-16 | 2021-12-31 | 北京工业大学 | Method and material for reinforcing electric power tunnel by fiber grid reinforced polymer mortar |
| CN111620621B (en) * | 2020-05-13 | 2022-05-13 | 东南大学 | 3D printing concrete fiber material mesh reinforcing member and preparation method thereof |
| CN113354346A (en) * | 2021-07-12 | 2021-09-07 | 中国铁建重工集团股份有限公司 | Concrete containing fiber reinforcement and manufacturing method thereof |
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| DE19954337C2 (en) * | 1999-11-11 | 2003-08-21 | Quinting Gmbh | Process for the production of textile reinforced in-situ concrete |
| CN101100905B (en) * | 2007-07-31 | 2010-06-09 | 上海维固工程实业有限公司 | Reinforcement method for concrete structure |
| CN101412609B (en) * | 2008-10-21 | 2011-05-11 | 中冶集团建筑研究总院 | Cement polymer mortar for reinforcing and repairing concrete |
| CN101503881B (en) * | 2009-03-18 | 2011-04-27 | 北京特希达技术研发有限公司 | Method for reinforcing underwater structure by fiber-reinforced composite material grid ribs |
| CN102718447B (en) * | 2012-04-11 | 2015-01-14 | 陈明中 | High-performance reinforced mortar suitable for thick-layer spraying and preparation method thereof |
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