CN102979315A - Method of reinforcing concrete component - Google Patents
Method of reinforcing concrete component Download PDFInfo
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- CN102979315A CN102979315A CN2011102641209A CN201110264120A CN102979315A CN 102979315 A CN102979315 A CN 102979315A CN 2011102641209 A CN2011102641209 A CN 2011102641209A CN 201110264120 A CN201110264120 A CN 201110264120A CN 102979315 A CN102979315 A CN 102979315A
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- prepreg tape
- basalt fibre
- fibre prepreg
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Abstract
The invention belongs to the technical field of materials, and relates to a method of reinforcing a concrete component. The method of reinforcing the concrete component includes the following steps: (1) preparing a thermoplasticity resin base basalt fiber prepreg tape, (2) processing for the surface of the concrete component which needs reinforcing, (3) guaranteeing the initial position and the stopping position of installation of a basalt fiber prepreg tape, and pre-installing a fixed device of a prepreg tape on the initial position, and fixing one end of the prepreg tape which is prepared by the step (1) on the initial position, (4) coating adhesion agents on the surface of the concrete component which needs reinforcing, (5) installing a tensioning device of the prepreg tape, and fixing the other end of the prepreg tape, (6) dismantling the tensioning positioning device of the prepreg tape, and clipping redundant basalt fiber prepreg tape, (7) compaction processing, and (8) solidifying, and dismantling pressed panels. The method of reinforcing the concrete component is good in sticking effect, avoids shearing peeling damage of the end portion of the basalt fiber prepreg tape, can obviously improve the stress performance of reinforced concrete structure, and has obviously economic advantages.
Description
Technical field
The invention belongs to the material technology field, relate to a kind of method of reinforced concrete member.
Background technology
The method of traditional carbon fiber reinforced concrete adopts carbon cloth more, carbon cloth all adopts through, latitude textile technology, carry out again gluing, technique is numerous and diverse, cost is high, more significant is that carbon fiber wire is extremely short owing to wire diameter, and warp, latitude carbon fiber move towards crooked, folding volume in fabrication processes, has had a strong impact on the tensile strength of carbon fiber wire.
Carbon fiber is used for the conventional art that concrete structure reinforcement is repaired, be utilize impregnating resin with carbon cloth along being subjected to force direction or perpendicular to sticked on the impaired concrete component by force direction, make it and the original reinforcing bar co-operation of member, thereby reach reinforcement and strengthening to concrete component.Can increase structure tension and shear resistance after the reinforcing, effectively improve its intensity, rigidity, crack resistance and ductility, the continuation development of control crack and amount of deflection.But the price of carbon fiber is subjected to the interference of international market very big, and at present, the price of carbon fibre precursor was doubled before 2 years, so that its application in China's civil engineering is subject to great restriction.
Basalt fibre is a kind of inorganic fibers, is described as " new material of 21 century ", adopts natural basalt ore fusion draw to form.It has high strength, low-density, low heat conductivity, good dielectricity and to the chemical stability of corrosive medium.The basalt fibre reinforcing composite material of domestic-developed still belongs to a kind of new reinforcing material at present, although its ultimate strength is not as good as carbon fibre reinforced composite, but it will be higher than carbon fibre reinforced composite at aspects such as anticorrosive, heat resistanceheat resistants, and the ductility of basalt fibre reinforcing composite material is well more a lot of than carbon fibre reinforced composite.Basalt fibre also is in the starting stage in the application study of field of civil engineering both at home and abroad, its cost performance is high, and development prospect is optimistic, is expected to obtain good economic and social benefit in civil engineering reinforcing industry.
Summary of the invention
The purpose of invention is to provide for the problem of prior art existence a kind of method of reinforced concrete member, this kind reinforcement means technique is simple, successful is compared with the carbon fiber reinforced concrete component technology of having promoted the use of at present, has significant economic advantages.
For achieving the above object, the following technical scheme of employing of the present invention:
A kind of method of reinforced concrete member comprises step:
1) with thermoplastic resin continuous basalt fiber Shu Jinhang is applied, make thermoplastic resin-based basalt fibre prepreg tape;
2) determine the surf zone of the concrete component that needs reinforcement, the surface of this concrete component is processed, make concrete surface smooth;
3) determine original position and the final position that the basalt fibre prepreg tape is installed, and in the default prepreg tape fastening devices of original position, one end of the thermoplastic resin-based basalt fibre prepreg tape that then step (1) is prepared heats by fastening devices, is fixed on original position;
4) smear bonding adhesive on the surface of the concrete component that needs reinforcement;
5) other end with the basalt fibre prepreg tape is connected with the prepreg tape tensioning equipment, clamps the basalt fibre prepreg tape by the prepreg tape tensioning equipment and carries out stretch-draw, applies prestressing force.After prestressing force is moved controlling value to, the other end of basalt fibre prepreg tape is fixed on final position;
6) remove the prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;
7) be subjected to the force direction roll extrusion to extrude bubble with cylinder along the basalt fibre prepreg tape, so that basalt fibre prepreg tape and concrete surface are closely pasted; External surface at the basalt fibre prepreg tape is laid the compression plate material, by the mode that overstock on lower top the basalt fibre prepreg tape after pasting is implemented compacting operation;
8) after basalt fibre prepreg tape, bonding adhesive solidify fully, remove the pressurized sheet material in the step (7).
Thermoplastic resin is selected from the described step (1): one or more in vistanex, polyamide, Corvic, polystyrene resin, polycarbonate resin, polyphenylene oxide resin or the polysulfone resin;
The mass fraction that makes basalt fibre in the thermoplastic resin-based basalt fibre prepreg tape in the described step (1) is 50～60%, and the mass fraction of thermoplastic resin is 40～50%.
Be applied to dual coating in the described step (1).
Prepreg tape thickness is 0.22～0.28mm in the described step (1).
The surface-treated step is in the described step (2): concrete surface is polished with emery wheel or angle grinding machine to being stuck, to remove the impurity such as surface porosity layer and grease, until expose new concrete interface fully, and remove the floating ash in surface clean with compressed air.When basalt fibre prepreg tape corner was pasted, the corner will be carried out chamfered and is polished into circular-arc (R 〉=20mm).When there is the crack in concrete surface, should at first be in the milk by the designing requirement fracture or seals processing.After reaching some strength, grouting material carries out again aforesaid operations.
In the described step (3) fixedly the heating-up temperature of prepreg tape be 160～240 ℃.
Fastening devices in the described step (3) comprises base plate and cover plate, and described base plate is fixed on the surface of concrete component by crab-bolt, and described base plate and cover plate are by the fixing clamping that realizes prepreg tape of the bolt after fastening.
Bonding adhesive in the described step (4) is two component modified epoxyns, and amount ranges is at 200～400g/m
2
The prestressed controlling value of described step (5) is 20～40KN.
The enforcement pressure of compacting operation is 10～20KN/m in the described step (7)
2
Pressurized sheet material in the described step (8) is selected from laminate stacked together or cystosepiment, and wherein the external surface of cystosepiment is laid with the plastics mould release membrance, directly contacts prepreg tape.
The invention has the beneficial effects as follows:
1. the thermoplastic resin-based basalt fibre prepreg tape that adopts of the present invention; the basalt fibre tow is unidirectional arranges; greatly strengthened the tensile strength of basalt fiber composite material; thermoplastic resin is to the thorough impregnation of basalt fibre; effectively improved in the work progress owing to the reasons such as bending to the performance damage that basalt fibre causes, played obvious protection effect.
2. the thermoplastic resin-based basalt fibre prepreg tape that adopts of the present invention has outstanding anti-fatigue ability and from heavy and light, anti-corruption, the characteristics such as intensity is high, pliability is good, be applicable to various component surface (beam, post, ventilator, pipeline, body of wall), the present invention is by the method reinforced concrete member, because the prepreg tape wide cut is large, designability is good, compare with the traditional carbon fibres reinforcement means, technique is simple, saving of work and time simultaneously, has been saved cost greatly, and, this prepreg tape can reuse, and the melting recycling is a kind of environmental protection new material.
Description of drawings
Fig. 1 is technological process of production schematic diagram of the present invention.
The specific embodiment
Preparation of construction: surface of concrete structure and processing method, the coating of bonding adhesive, the preparation of thermoplastic resin-based basalt fibre prepreg tape and the situation of stickup, compacting and maintenance of intending reinforcing are carried out abundant design and researchp, and to using material, the ready work of instrument.
The surfacing of concrete firmware: with the polishing of emery wheel or angle grinding machine, removing the impurity such as surface porosity layer and grease, until expose new concrete interface fully, and remove the floating ash in surface clean with compressed air to the concrete surface that is stuck.When basalt fibre prepreg tape corner was pasted, the corner will be carried out chamfered and is polished into circular-arc (R 〉=20mm).When there is the crack in concrete surface, should at first be in the milk by the designing requirement fracture or seals processing.After reaching some strength, grouting material carries out again aforesaid operations.
When concrete surface is uneven, uses levelling glue rejected region is filled up smooth.After the alignment material dry tack free, carry out again further work.
Brushing adhesive stick: after bonding adhesive configures, evenly be applied in concrete surface with rotary broom.The effect of bonding adhesive is the bonding force of strengthening thermoplastic resin-based basalt fibre prepreg tape and concrete surface.This is very important for giving full play to of consolidation effect.
Prepreg tape is pasted: an end of basalt fibre prepreg tape is heated by fastening devices, be fixed on original position; The other end of basalt fibre prepreg tape is connected with the prepreg tape tensioning equipment, clamps the basalt fibre prepreg tape by the prepreg tape tensioning equipment and carry out stretch-draw, apply prestressing force.After prestressing force is moved controlling value to, the other end of basalt fibre prepreg tape is fixed on final position; When pasting the basalt fibre prepreg tape, with cylinder along the basalt fibre prepreg tape be subjected to force direction repeatedly roll extrusion to extrude bubble, so that basalt fibre prepreg tape and concrete surface are closely pasted.
Compacting and maintenance: the external surface at the basalt fibre prepreg tape is laid the compression plate material, by the mode that overstock on lower top the basalt fibre prepreg tape after pasting is implemented compacting operation; After basalt fibre prepreg tape, bonding adhesive solidify fully, remove pressurized sheet material.
Embodiment 1
1) with modified polypropene continuous basalt fiber Shu Jinhang is applied, make polypropylene-base basalt fibre prepreg tape, thickness is 0.28 ± 0.02mm, and the mass fraction of fiber is 50%, and the mass fraction of thermoplastic resin is 50%;
2) determine the surf zone of the concrete component that needs reinforcement, surface of concrete structure is processed, make concrete surface smooth;
3) determine original position and the final position that the basalt fibre prepreg tape is installed, and in the default prepreg tape fastening devices of original position, then the end with the basalt fibre prepreg tape heats by fastening devices, heating-up temperature is at 170～180 ℃, be fixed on original position, fastening devices in the present embodiment comprises base plate and cover plate, and described base plate is fixed on the surface of concrete component by crab-bolt, and described base plate and cover plate are by the fixing clamping that realizes prepreg tape of the bolt after fastening;
4) smear two component modified epoxyns on the surface of the concrete component that needs reinforcement, consumption is 300g/m
2
5) other end with the basalt fibre prepreg tape is connected with the prepreg tape tensioning equipment, clamps the basalt fibre prepreg tape by the prepreg tape tensioning equipment and carries out stretch-draw, applies prestressing force.Prestressing force move to controlling value (〉=20KN ,≤40KN) after, the other end of basalt fibre prepreg tape is fixed on final position;
6) remove the prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;
7) be subjected to the force direction roll extrusion to extrude bubble with cylinder along the basalt fibre prepreg tape, so that basalt fibre prepreg tape and concrete surface are closely pasted;
8) lay the compression plate material at the external surface of basalt fibre prepreg tape, by the mode that overstock on lower top the basalt fibre prepreg tape after pasting is implemented compacting operation;
9) after basalt fibre prepreg tape, bonding adhesive solidify fully, remove pressurized sheet material.
Embodiment 2
1) with modified polypropene continuous basalt fiber Shu Jinhang is applied, make polypropylene-base basalt fibre prepreg tape, thickness is 0.25 ± 0.02mm, and the mass fraction of fiber is 55%, and the mass fraction of thermoplastic resin is 45%;
2) determine the surf zone of the concrete component that needs reinforcement, surface of concrete structure is processed, make concrete surface smooth;
3) determine original position and the final position that the basalt fibre prepreg tape is installed, and in the default prepreg tape fastening devices of original position, then the end with the basalt fibre prepreg tape heats by fastening devices, heating-up temperature is at 170～180 ℃, be fixed on original position, fastening devices in the present embodiment comprises base plate and cover plate, and described base plate is fixed on the surface of concrete component by crab-bolt, and described base plate and cover plate are by the fixing clamping that realizes prepreg tape of the bolt after fastening;
4) smear two component modified epoxyns on the surface of the concrete component that needs reinforcement, consumption is 300g/m
2
5) other end with the basalt fibre prepreg tape is connected with the prepreg tape tensioning equipment, clamps the basalt fibre prepreg tape by the prepreg tape tensioning equipment and carries out stretch-draw, applies prestressing force.Prestressing force move to controlling value (〉=20KN ,≤40KN) after, the other end of basalt fibre prepreg tape is fixed on final position;
6) remove the prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;
7) be subjected to the force direction roll extrusion to extrude bubble with cylinder along the basalt fibre prepreg tape, so that basalt fibre prepreg tape and concrete surface are closely pasted;
8) lay the compression plate material at the external surface of basalt fibre prepreg tape, by the mode that overstock on lower top the basalt fibre prepreg tape after pasting is implemented compacting operation;
9) after basalt fibre prepreg tape, bonding adhesive solidify fully, remove pressurized sheet material.
Embodiment 3
1) with modified polypropene continuous basalt fiber Shu Jinhang is applied, make polypropylene-base basalt fibre prepreg tape, thickness is 0.22 ± 0.02mm, and the mass fraction of fiber is 60%, and the mass fraction of thermoplastic resin is 40%;
2) determine the surf zone of the concrete component that needs reinforcement, surface of concrete structure is processed, make concrete surface smooth;
3) determine original position and the final position that the basalt fibre prepreg tape is installed, and in the default prepreg tape fastening devices of original position, then the end with the basalt fibre prepreg tape heats by fastening devices, heating-up temperature is at 170～180 ℃, be fixed on original position, fastening devices in the present embodiment comprises base plate and cover plate, and described base plate is fixed on the surface of concrete component by crab-bolt, and described base plate and cover plate are by the fixing clamping that realizes prepreg tape of the bolt after fastening;
4) smear two component modified epoxyns on the surface of the concrete component that needs reinforcement, consumption is 300g/m
2
5) other end with the basalt fibre prepreg tape is connected with the prepreg tape tensioning equipment, clamps the basalt fibre prepreg tape by the prepreg tape tensioning equipment and carries out stretch-draw, applies prestressing force.Prestressing force move to controlling value (〉=20KN ,≤40KN) after, the other end of basalt fibre prepreg tape is fixed on final position;
6) remove the prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;
7) be subjected to the force direction roll extrusion to extrude bubble with cylinder along the basalt fibre prepreg tape, so that basalt fibre prepreg tape and concrete surface are closely pasted;
8) lay the compression plate material at the external surface of basalt fibre prepreg tape, by the mode that overstock on lower top the basalt fibre prepreg tape after pasting is implemented compacting operation;
9) after basalt fibre prepreg tape, bonding adhesive solidify fully, remove pressurized sheet material.
Embodiment 4
1) apply with 6 couples of continuous basalt fiber Shu Jinhang of modification of nylon, make the basalt fibre prepreg tape, thickness is 0.30 ± 0.02mm, and the mass fraction of fiber is 55%, and the mass fraction of resin is 45%;
2) determine the surf zone of the concrete component that needs reinforcement, surface of concrete structure is processed, make concrete surface smooth;
3) determine original position and the final position that the basalt fibre prepreg tape is installed, and in the default prepreg tape fastening devices of original position, then the end with the basalt fibre prepreg tape heats by fastening devices, heating-up temperature is at 220～230 ℃, be fixed on original position, fastening devices in the present embodiment comprises base plate and cover plate, and described base plate is fixed on the surface of concrete component by crab-bolt, and described base plate and cover plate are by the fixing clamping that realizes prepreg tape of the bolt after fastening;
4) smear two component modified epoxyns on the surface of the concrete component that needs reinforcement, consumption is 400g/m
2
5) other end with the basalt fibre prepreg tape is connected with the prepreg tape tensioning equipment, clamps the basalt fibre prepreg tape by the prepreg tape tensioning equipment and carries out stretch-draw, applies prestressing force.Prestressing force move to controlling value (〉=20KN ,≤40KN) after, the other end of basalt fibre prepreg tape is fixed on final position;
6) remove the prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;
7) be subjected to the force direction roll extrusion to extrude bubble with cylinder along the basalt fibre prepreg tape, so that basalt fibre prepreg tape and concrete surface are closely pasted;
8) lay the compression plate material at the external surface of basalt fibre prepreg tape, by the mode that overstock on lower top the basalt fibre prepreg tape after pasting is implemented compacting operation;
9) after basalt fibre prepreg tape, bonding adhesive solidify fully, remove pressurized sheet material.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. the method for a reinforced concrete member, it is characterized in that: it comprises following steps:
1) with thermoplastic resin continuous basalt fiber Shu Jinhang is applied, make thermoplastic resin-based basalt fibre prepreg tape;
2) determine the surf zone of the concrete component that needs reinforcement, the surface of this concrete component is processed, make concrete surface smooth;
3) determine original position and the final position that the basalt fibre prepreg tape is installed, and in the default prepreg tape fastening devices of original position, one end of the thermoplastic resin-based basalt fibre prepreg tape that then step (1) is prepared heats by fastening devices, is fixed on original position;
4) smear bonding adhesive on the surface of the concrete component that needs reinforcement;
5) other end with the basalt fibre prepreg tape is connected with the prepreg tape tensioning equipment, clamp the basalt fibre prepreg tape by the prepreg tape tensioning equipment and carry out stretch-draw, apply prestressing force, after prestressing force is moved controlling value to, the other end of basalt fibre prepreg tape is fixed on final position;
6) remove the prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;
7) be subjected to the force direction roll extrusion to extrude bubble with cylinder along the basalt fibre prepreg tape, so that basalt fibre prepreg tape and concrete surface are closely pasted; External surface at the basalt fibre prepreg tape is laid the compression plate material, by the mode that overstock on lower top the basalt fibre prepreg tape after pasting is implemented compacting operation;
8) after basalt fibre prepreg tape, bonding adhesive solidify fully, remove the pressurized sheet material in the step (7).
2. method according to claim 1 is characterized in that: thermoplastic resin is selected from the described step (1): one or more in vistanex, polyamide, Corvic, polystyrene resin, polycarbonate resin, polyphenylene oxide resin or the polysulfone resin.
3. method according to claim 1, it is characterized in that: the mass fraction of basalt fibre is 50～60% in the thermoplastic resin-based basalt fibre prepreg tape that makes in the described step (1), and the mass fraction of thermoplastic resin is 40～50%.
4. method according to claim 1 is characterized in that: be applied to dual coating in the described step (1);
Or prepreg tape thickness is 0.22～0.28mm in the described step (1).
5. method according to claim 1, it is characterized in that: the surface-treated step is in the described step (2): concrete surface is polished with emery wheel or angle grinding machine to being stuck, until expose new concrete interface fully, and with compressed air the floating ash in surface is removed totally, the corner of basalt fibre prepreg tape is carried out chamfered and is polished into circular-arc.
6. method according to claim 1 is characterized in that: in the described step (3) fixedly the heating-up temperature of prepreg tape be 160～240 ℃;
Or the fastening devices in the described step (3) comprises base plate and cover plate, and described base plate is fixed on the surface of concrete component by crab-bolt, and described base plate and cover plate are by the fixing clamping that realizes prepreg tape of the bolt after fastening.
7. method according to claim 1 is characterized in that: the bonding adhesive in the described step (4) is two component modified epoxyns, and consumption is 200～400g/m
2
8. method according to claim 1, it is characterized in that: the prestressed controlling value of described step (5) is 20～40KN.
9. method according to claim 1 is characterized in that: the enforcement pressure of compacting operation is 10～20KN/m in the described step (7)
2
10. method according to claim 1, it is characterized in that: the pressurized sheet material in the described step (8) is selected from laminate stacked together or cystosepiment, and wherein the external surface of cystosepiment is laid with the plastics mould release membrance, directly contacts prepreg tape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110264120.9A CN102979315B (en) | 2011-09-07 | 2011-09-07 | A kind of method of reinforced concrete member |
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| CN201110264120.9A CN102979315B (en) | 2011-09-07 | 2011-09-07 | A kind of method of reinforced concrete member |
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Cited By (3)
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| CN103643701A (en) * | 2013-12-04 | 2014-03-19 | 中国石油化工集团公司 | Precast pile static load test pile head processing method |
| CN105781143A (en) * | 2016-04-29 | 2016-07-20 | 华北水利水电大学 | Device and method for reinforcing concrete shear wall by FRP (fiber reinforced plastics) |
| WO2019203756A3 (en) * | 2018-04-20 | 2019-12-12 | Kordsa Teknik Tekstil A.S. | Use of prepregs in structures as a reinforcing material |
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| WO2019203756A3 (en) * | 2018-04-20 | 2019-12-12 | Kordsa Teknik Tekstil A.S. | Use of prepregs in structures as a reinforcing material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102979315B (en) | 2016-04-06 |
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