CN104389439A - Strengthening method for reinforced concrete column - Google Patents
Strengthening method for reinforced concrete column Download PDFInfo
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- CN104389439A CN104389439A CN201410786289.4A CN201410786289A CN104389439A CN 104389439 A CN104389439 A CN 104389439A CN 201410786289 A CN201410786289 A CN 201410786289A CN 104389439 A CN104389439 A CN 104389439A
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Abstract
The invention discloses a strengthening method for a reinforced concrete column and belongs to the technical field of structural engineering in the civil engineering industry. The strengthening method adopts two materials at the same time, namely a cement-based capillary crystalline material and a fiber cloth reinforced composite material. The strengthening method comprises the following steps: first the outer surface of the reinforced concrete column is uniformly painted with the cement-based capillary crystalline material and is maintained; then the reinforced concrete column is crosswise wrapped with the fiber cloth reinforced composite material. The cement-based capillary crystalline material can repair crack damage in concrete by virtue of permeation and crystallization, so that the concrete becomes more compact and the strength and the durability of the concrete are improved. The fiber cloth reinforced composite material wrapping the reinforced concrete column can effectively confine lateral expansion of the concrete to improve the strength and the stretchability of the confined concrete, and meanwhile can further prevent the concrete from being damaged by external adverse environment. Therefore, the strengthening method is suitable for strengthening reinforced concrete columns with seriously poor durability, strength and stretchability.
Description
Technical field
The present invention relates to the technical field of structural engineering in civil engineering industry, specifically a kind of reinforcement means of reinforced concrete post.
Background technology
Along with the growth of service time, constantly will there is deterioration in reinforced concrete post, main manifestations is the increase of concrete carbonation depth, inner rebar corrosion, concrete cracking, intensity and ductility reduction etc.Once above-mentioned defect appears in reinforced concrete post, the bearing capacity of reinforced concrete post, ductility directly will be caused to occur significantly to decline, make this post there is potential safety hazard, may safety of life and property be caused.Therefore, be necessary to propose the more effective reinforcement means of one, make to meet the crack damage of mending concrete inside simultaneously, improve concrete density, increase concrete strength and ductility.
Summary of the invention
The object of the invention is the mass defect existed for existing reinforced concrete post and a kind of reinforcement means proposed, having come by adopting cement-base infiltration crystallization material and fibre reinforced composites.Cement-base infiltration crystallization material can the crack damage of mending concrete inside by infiltration and crystallization, makes concrete become more closely knit, and improves concrete intensity and durability; Outer wrapping fiber reinforced composite passes through the lateral expansion distortion of confined concrete effectively, and can improve restrained concrete strength and ductility, fibre reinforced composites can prevent extraneous adverse environment to concrete infringement further simultaneously.Therefore, reinforcing when the method is suitable for the durability of reinforced concrete post, intensity and ductility wretched insufficiency.
The concrete technical scheme realizing the object of the invention is:
A reinforcement means for reinforced concrete post, this reinforcement means must adopt cement-base infiltration crystallization material and fibre reinforced composites simultaneously.First at reinforced concrete post surface smear cement-base infiltration crystallization material, and then at cement-base infiltration crystallization material surface outer wrapping fiber reinforced composite.
Concrete operation step is as follows:
A, reinforced concrete post surfacing: floated coat and the rarefaction defect part of removing reinforced concrete post surface, until revealed solid concrete structure surface; Then dabbing process is carried out to concrete surface;
B, smear cement-base infiltration crystallization material at concrete surface after treatment, thickness, at 1 ~ 10mm, after smearing, carries out spray water maintenance; Every day, wet curing three times, made the infiltration of cement-base infiltration crystallization material and crystallization function be not fully exerted; Curing time is 1 ~ 2 week;
C, at the good cement-base infiltration crystallization outer surface hoop covered fiber reinforced composite of maintenance, the coated fibre reinforced composites number of plies is 1 ~ 4.
Described cement-base infiltration crystallization material be with cement, quartz powder for base material, mix the pulverulent material of various active chemical substance, have infiltration with crystallization double effects.
Described fibre reinforced composites are carbon fiber, glass fiber, aramid fiber or basalt fibre.
According to above technical scheme, following beneficial effect can be realized:
1. cement-base infiltration crystallization material has infiltration and crystallization double effects, can the crack damage of mending concrete inside, makes concrete more closely knit simultaneously, improves concrete intensity and durability;
2. the fibre reinforced composites of outsourcing can confined concrete effectively, and its strength and ductility is improved, prevent further simultaneously around adverse environment to concrete infringement;
3. the present invention can improve the intensity of reinforced concrete post, ductility and durability significantly.
Accompanying drawing explanation
Fig. 1 is the vertical schematic diagram of reinforced concrete post adopting reinforcement means of the present invention;
Fig. 2 is A-A sectional view in Fig. 1;
Wherein: reinforced concrete post 1; Cement-base infiltration crystallization material 2; Fibre reinforced composites 3.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described, but protection domain not thereby limiting the invention.
Embodiment 1
Certain single storey industry workshop, the intensity of its reinforced concrete post, ductility and durability are subject to major injury, need at present to reinforce.When adopting the reinforced concrete post of reinforcement means of the present invention to intensity, ductility and durability wretched insufficiency to reinforce, its concrete reinforcing step is as follows:
A, reinforced concrete post surfacing: floated coat and the rarefaction defect part of removing reinforced concrete post surface, until revealed solid concrete structure surface; Then dabbing process is carried out to concrete surface;
B, smear cement-base infiltration crystallization material-Sai Baisi (XYPEX) at concrete surface after treatment, thickness 6 mm, after smearing, carry out spray water maintenance; Every day, wet curing three times, made the infiltration of cement-base infiltration crystallization material and crystallization function be not fully exerted; Maintenance 10 days.
C, in the good cement-base infiltration crystallization outer surface hoop carbon coated cloth 2 layers of maintenance.Concrete section form as shown in Figure 2.
Embodiment 2
Certain large supermarket's individual layer storehouse, the intensity of its reinforced concrete post, ductility and durability are subject to major injury, need at present to reinforce.When adopting the reinforced concrete post of reinforcement means of the present invention to intensity, ductility and durability wretched insufficiency to reinforce, its concrete reinforcing step is as follows:
A, reinforced concrete post surfacing: floated coat and the rarefaction defect part of removing reinforced concrete post surface, until revealed solid concrete structure surface; Then dabbing process is carried out to concrete surface;
B, smear cement-base infiltration crystallization material-Sai Baisi (XYPEX) at concrete surface after treatment, thickness 8 mm, after smearing, carry out spray water maintenance; Every day, wet curing three times, made the infiltration of cement-base infiltration crystallization material and crystallization function be not fully exerted; Maintenance 12 days.
C, at the good coated basalt fiber cloth of cement-base infiltration crystallization outer surface hoop 3 layers of maintenance.
Claims (4)
1. the reinforcement means of a reinforced concrete post, it is characterized in that: dabbing process is carried out to reinforced concrete post surface, at its surface smear cement-base infiltration crystallization material, then the cement-base infiltration crystallization material surface outer wrapping fiber reinforced composite that wipes is being coated with, the intensity of reinforcing steel bar concrete column, ductility and durability.
2. the reinforcement means according to right 1, is characterized in that: concrete operation step is as follows:
A, reinforced concrete post surfacing: floated coat and the rarefaction defect part of removing reinforced concrete post surface, until revealed solid concrete structure surface; Then dabbing process is carried out to concrete surface;
B, smear cement-base infiltration crystallization material at concrete surface after treatment, thickness, at 1 ~ 10mm, after smearing, carries out spray water maintenance; Every day, wet curing three times, made the infiltration of cement-base infiltration crystallization material and crystallization function be not fully exerted; Curing time is 1 ~ 2 week;
C, at the good cement-base infiltration crystallization outer surface hoop covered fiber reinforced composite of maintenance, the coated fibre reinforced composites number of plies is 1 ~ 4.
3. the reinforcement means according to right 1, is characterized in that: described cement-base infiltration crystallization material be with cement, quartz powder for base material, mix the pulverulent material of various active chemical substance, have infiltration with crystallization double effects.
4. the reinforcement means according to right 1, is characterized in that: described fibre reinforced composites are carbon fiber, glass fiber, aramid fiber or basalt fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410786289.4A CN104389439A (en) | 2014-12-18 | 2014-12-18 | Strengthening method for reinforced concrete column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410786289.4A CN104389439A (en) | 2014-12-18 | 2014-12-18 | Strengthening method for reinforced concrete column |
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| CN104389439A true CN104389439A (en) | 2015-03-04 |
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| CN201410786289.4A Pending CN104389439A (en) | 2014-12-18 | 2014-12-18 | Strengthening method for reinforced concrete column |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013838A (en) * | 2016-07-22 | 2016-10-12 | 广东电网有限责任公司电力科学研究院 | Method and device for reinforcing concrete power transformation structure frame |
| CN106401204A (en) * | 2016-09-05 | 2017-02-15 | 南京工业大学 | Composite strengthening method through fiber-reinforced high-damping polymer concrete coated with carbon fiber cloth |
| CN106907018A (en) * | 2017-04-25 | 2017-06-30 | 中国二十冶集团有限公司 | A kind of house stub method for repairing and mending |
| CN108612185A (en) * | 2018-05-18 | 2018-10-02 | 西南交通大学 | The means of defence of concrete structure |
| CN111827704A (en) * | 2019-04-17 | 2020-10-27 | 深圳市中固建筑加固技术有限公司 | Reinforced concrete structure and reinforcing method |
| CN113898373A (en) * | 2021-10-19 | 2022-01-07 | 辽宁工业大学 | FRP-PVC membrane shell filled with self-compacting coal gangue concrete fireproof combined coal pillar and reinforcing method |
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| JPH09158493A (en) * | 1995-12-11 | 1997-06-17 | Nippon Riwaaku:Kk | Earthquake resistance reinforcing method for existing reinforced concrete column |
| JPH11324343A (en) * | 1998-05-14 | 1999-11-26 | Toray Ind Inc | Method for reinforcing reinforced concrete column by fiber sheet |
| CN1851202A (en) * | 2006-05-26 | 2006-10-25 | 上海大学 | Steel reinforced concrete rectangular column reinforcing method |
| CN102561412A (en) * | 2012-02-07 | 2012-07-11 | 山东大学 | Reinforcement method for fiber reinforced composite plastic and concrete |
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- 2014-12-18 CN CN201410786289.4A patent/CN104389439A/en active Pending
Patent Citations (4)
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| JPH09158493A (en) * | 1995-12-11 | 1997-06-17 | Nippon Riwaaku:Kk | Earthquake resistance reinforcing method for existing reinforced concrete column |
| JPH11324343A (en) * | 1998-05-14 | 1999-11-26 | Toray Ind Inc | Method for reinforcing reinforced concrete column by fiber sheet |
| CN1851202A (en) * | 2006-05-26 | 2006-10-25 | 上海大学 | Steel reinforced concrete rectangular column reinforcing method |
| CN102561412A (en) * | 2012-02-07 | 2012-07-11 | 山东大学 | Reinforcement method for fiber reinforced composite plastic and concrete |
Non-Patent Citations (2)
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| 淳庆等: "民国时期钢筋混凝土结构常见缺陷及适宜性加固方法研究", 《文物保护与考古科学》, vol. 25, no. 1, 28 February 2013 (2013-02-28) * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013838A (en) * | 2016-07-22 | 2016-10-12 | 广东电网有限责任公司电力科学研究院 | Method and device for reinforcing concrete power transformation structure frame |
| CN106401204A (en) * | 2016-09-05 | 2017-02-15 | 南京工业大学 | Composite strengthening method through fiber-reinforced high-damping polymer concrete coated with carbon fiber cloth |
| CN106907018A (en) * | 2017-04-25 | 2017-06-30 | 中国二十冶集团有限公司 | A kind of house stub method for repairing and mending |
| CN108612185A (en) * | 2018-05-18 | 2018-10-02 | 西南交通大学 | The means of defence of concrete structure |
| CN111827704A (en) * | 2019-04-17 | 2020-10-27 | 深圳市中固建筑加固技术有限公司 | Reinforced concrete structure and reinforcing method |
| CN113898373A (en) * | 2021-10-19 | 2022-01-07 | 辽宁工业大学 | FRP-PVC membrane shell filled with self-compacting coal gangue concrete fireproof combined coal pillar and reinforcing method |
| CN113898373B (en) * | 2021-10-19 | 2023-10-13 | 辽宁工业大学 | FRP-PVC film shell internally filled with self-compaction gangue concrete fireproof combined coal column and reinforcing method |
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Application publication date: 20150304 |