CN102979315B - A kind of method of reinforced concrete member - Google Patents

A kind of method of reinforced concrete member Download PDF

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Publication number
CN102979315B
CN102979315B CN201110264120.9A CN201110264120A CN102979315B CN 102979315 B CN102979315 B CN 102979315B CN 201110264120 A CN201110264120 A CN 201110264120A CN 102979315 B CN102979315 B CN 102979315B
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China
Prior art keywords
prepreg tape
basalt fibre
concrete
fibre prepreg
thermoplastic resin
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CN201110264120.9A
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Chinese (zh)
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CN102979315A (en
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冉廷宝
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辽宁辽杰科技有限公司
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Publication of CN102979315A publication Critical patent/CN102979315A/en
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Abstract

The invention belongs to field of material technology, relate to a kind of method of reinforced concrete member, the method includes the steps of: 1) prepare thermoplastic resin-based basalt fibre prepreg tape; 2) surface of concrete structure needed reinforcement is processed; 3) determine the original position that basalt fibre prepreg tape is installed and final position, and preset prepreg tape fastening devices in original position, the one end of the prepreg tape then step (1) prepared is fixed on original position; 4) at the surface smear bonding adhesive of the concrete component needed reinforcement; 5) prepreg tape tensioning equipment is installed, the other end of fixing prepreg tape; 6) remove prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape; 7) compaction treatment; 8) solidify, remove pressurized sheet material.Sticking effect of the present invention is good, avoids the shearing stripping damage of basalt fibre prepreg tape end, obviously can improve the stress performance of concrete structure after reinforcing, have significant economic advantages.

Description

A kind of method of reinforced concrete member

Technical field

The invention belongs to field of material technology, relate to a kind of method of reinforced concrete member.

Background technology

Method many employings carbon cloth of traditional carbon fiber reinforced concrete, carbon cloth all adopts through, latitude textile technology, carry out gluing again, cumbersome, cost is high, more significant is carbon fiber wire because wire diameter is extremely short, and bending through, latitude carbon fiber trend in fabrication processes, folding is compiled, and 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, utilize impregnating resin by carbon cloth along Impact direction or be pasted onto on impaired concrete component perpendicular to Impact direction, make it original reinforcing bar co-operation with component, thus reach the reinforcement and strengthening to concrete component.Structure tension and shear resistance can be increased after reinforcing, effectively improve its intensity, rigidity, crack resistance and ductility, the continuation development of control critical eigenvalue and amount of deflection.But the price of carbon fiber is very big by the interference of international market, at present, the price of carbon fibre precursor was comparatively doubled before 2 years, made its application in China's civil engineering be 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 the chemical stability to corrosive medium.The basalt fibre reinforcing composite material of current domestic-developed still belongs to a kind of new reinforcing material, although its ultimate strength is not as good as carbon fibre reinforced composite, but it is higher than carbon fibre reinforced composite in anticorrosive, heat resistanceheat resistant etc., and the ductility of basalt fibre reinforcing composite material is well more a lot of than carbon fibre reinforced composite.Also be in the starting stage to basalt fibre 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 reinforce in industry in civil engineering obtain good economic and social benefit.

Summary of the invention

The object of invention is a kind of method providing reinforced concrete member for prior art Problems existing, this kind of reinforcement means technique is simple, successful, compared with the carbon fiber reinforced concrete component technology 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 method for reinforced concrete member, comprises step:

1) with thermoplastic resin, continuous basalt fiber Shu Jinhang is applied, obtained thermoplastic resin-based basalt fibre prepreg tape;

2) determine the surf zone of the concrete component needed reinforcement, the surface of this concrete component is processed, make concrete surface smooth;

3) original position that basalt fibre prepreg tape is installed and final position is determined, and preset prepreg tape fastening devices in original position, then the one end of thermoplastic resin-based basalt fibre prepreg tape step (1) prepared is heated by fastening devices, is fixed on original position;

4) at the surface smear bonding adhesive of the concrete component needed reinforcement;

5) other end of basalt fibre prepreg tape is connected with prepreg tape tensioning equipment, carries out stretch-draw, Shi Hanzhang by prepreg tape tensioning equipment clamping basalt fibre prepreg tape.After prestressing force moves controlling value to, the other end of basalt fibre prepreg tape is fixed on final position;

6) remove prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;

7) extrude bubble with cylinder along the roll extrusion of basalt fibre prepreg tape Impact direction, closely paste to make basalt fibre prepreg tape and concrete surface; The external surface of basalt fibre prepreg tape is laid compression plate material, and the mode overstock by lower top implements compacting operation to the basalt fibre prepreg tape after stickup;

8) after basalt fibre prepreg tape, bonding adhesive solidify completely, the pressurized sheet material in step (7) is removed.

Thermoplastic resin is selected from described step (1): one or more in vistanex, polyamide, Corvic, polystyrene resin, polycarbonate resin, polyphenylene oxide resin or polysulfone resin;

In described step (1), in obtained thermoplastic resin-based basalt fibre prepreg tape, the mass fraction of basalt fibre is 50 ~ 60%, and the mass fraction of thermoplastic resin is 40 ~ 50%.

Dual coating is applied in described step (1).

In described step (1), prepreg tape thickness is 0.22 ~ 0.28mm.

In described step (2), surface-treated step is: to concrete surface emery wheel or the polishing of angle grinding machine of being stuck, to remove the impurity such as surface porosity layer and grease, until expose new concrete interface completely, and with compressed air, floating for surface ash is removed clean.When basalt fibre prepreg tape corner is pasted, corner will be carried out chamfered and is polished into arc-shaped (R >=20mm).When concrete surface exists crack, should first be undertaken being in the milk or Seal treatment by designing requirement fracture.Reach after some strength until grouting material and carry out aforesaid operations again.

The heating-up temperature of fixing prepreg tape in described step (3) is 160 ~ 240 DEG C.

Fastening devices in 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 the clamping realized prepreg tape fixed by described base plate and cover plate by the bolt after fastening.

Bonding adhesive in 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.

In described step (7), the enforcement pressure of compacting operation is 10 ~ 20KN/m 2.

Pressurized sheet material in described step (8) is selected from laminate stacked together or cystosepiment, and wherein the external surface of cystosepiment is laid with 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 of the present invention's employing; the unidirectional arrangement of basalt fibre tow; greatly strengthen the tensile strength of basalt fiber composite material; thermoplastic resin is to the thorough impregnation of basalt fibre; to effectively improve in work progress due to the performance damage that the reasons such as bending cause basalt fibre, serve obvious protected effect.

2. the thermoplastic resin-based basalt fibre prepreg tape that the present invention adopts has outstanding anti-fatigue ability and from heavy and light, anti-corruption, intensity is high, the features such as 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 prepreg tape wide cut is large, designability is good, compared with traditional carbon fibres reinforcement means, technique is simple, saving of work and time, simultaneously, greatly save cost, and, this prepreg tape can reuse, melting recycles, it is a kind of environmental protection new material.

Accompanying drawing explanation

Fig. 1 is technological process of production schematic diagram of the present invention.

Detailed description of the invention

Preparation of construction: to intend the surface of concrete structure of reinforcing and processing method thereof, the coating of bonding adhesive, the preparation of thermoplastic resin-based basalt fibre prepreg tape and stickup, compacting and maintenance situation carry out abundant design and researchp, and to use material, the ready work of instrument.

The surfacing of concrete firmware: to concrete surface emery wheel or the polishing of angle grinding machine of being stuck, to remove the impurity such as surface porosity layer and grease, until expose new concrete interface completely, and with compressed air, floating for surface ash is removed clean.When basalt fibre prepreg tape corner is pasted, corner will be carried out chamfered and is polished into arc-shaped (R >=20mm).When concrete surface exists crack, should first be undertaken being in the milk or Seal treatment by designing requirement fracture.Reach after some strength until grouting material and carry out aforesaid operations again.

When concrete surface is uneven, applies levelling glue and rejected region is filled up smooth.After alignment material dry tack free, then carry out further work.

Brushing adhesive stick: after bonding adhesive configures, with rotary broom uniform application in concrete surface.The effect of bonding adhesive is the bonding force 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: heated by fastening devices one end of basalt fibre prepreg tape, be fixed on original position; The other end of basalt fibre prepreg tape is connected with prepreg tape tensioning equipment, carries out stretch-draw, Shi Hanzhang by prepreg tape tensioning equipment clamping basalt fibre prepreg tape.After prestressing force moves controlling value to, the other end of basalt fibre prepreg tape is fixed on final position; Paste basalt fibre prepreg tape time, with cylinder along basalt fibre prepreg tape Impact direction repeatedly roll extrusion to extrude bubble, closely paste to make basalt fibre prepreg tape and concrete surface.

Compacting and maintenance: on the external surface of basalt fibre prepreg tape, lay compression plate material, the mode overstock by lower top implements compacting operation to the basalt fibre prepreg tape after stickup; After basalt fibre prepreg tape, bonding adhesive solidify completely, remove pressurized sheet material.

Embodiment 1

1) apply continuous basalt fiber Shu Jinhang with modified polypropene, obtained 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 needed reinforcement, surface of concrete structure is processed, make concrete surface smooth;

3) original position that basalt fibre prepreg tape is installed and final position is determined, and preset prepreg tape fastening devices in original position, then one end of basalt fibre prepreg tape is heated by fastening devices, heating-up temperature is at 170 ~ 180 DEG C, 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 the clamping realized prepreg tape fixed by described base plate and cover plate by the bolt after fastening;

4) at the two component modified epoxyn of the surface smear of the concrete component needed reinforcement, consumption is 300g/m 2;

5) other end of basalt fibre prepreg tape is connected with prepreg tape tensioning equipment, carries out stretch-draw, Shi Hanzhang by prepreg tape tensioning equipment clamping basalt fibre prepreg tape.The other end of basalt fibre prepreg tape is fixed on final position after moving controlling value (>=20KN ,≤40KN) to by prestressing force;

6) remove prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;

7) extrude bubble with cylinder along the roll extrusion of basalt fibre prepreg tape Impact direction, closely paste to make basalt fibre prepreg tape and concrete surface;

8) on the external surface of basalt fibre prepreg tape, lay compression plate material, the mode overstock by lower top implements compacting operation to the basalt fibre prepreg tape after stickup;

9) after basalt fibre prepreg tape, bonding adhesive solidify completely, pressurized sheet material is removed.

Embodiment 2

1) apply continuous basalt fiber Shu Jinhang with modified polypropene, obtained 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 needed reinforcement, surface of concrete structure is processed, make concrete surface smooth;

3) original position that basalt fibre prepreg tape is installed and final position is determined, and preset prepreg tape fastening devices in original position, then one end of basalt fibre prepreg tape is heated by fastening devices, heating-up temperature is at 170 ~ 180 DEG C, 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 the clamping realized prepreg tape fixed by described base plate and cover plate by the bolt after fastening;

4) at the two component modified epoxyn of the surface smear of the concrete component needed reinforcement, consumption is 300g/m 2;

5) other end of basalt fibre prepreg tape is connected with prepreg tape tensioning equipment, carries out stretch-draw, Shi Hanzhang by prepreg tape tensioning equipment clamping basalt fibre prepreg tape.The other end of basalt fibre prepreg tape is fixed on final position after moving controlling value (>=20KN ,≤40KN) to by prestressing force;

6) remove prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;

7) extrude bubble with cylinder along the roll extrusion of basalt fibre prepreg tape Impact direction, closely paste to make basalt fibre prepreg tape and concrete surface;

8) on the external surface of basalt fibre prepreg tape, lay compression plate material, the mode overstock by lower top implements compacting operation to the basalt fibre prepreg tape after stickup;

9) after basalt fibre prepreg tape, bonding adhesive solidify completely, pressurized sheet material is removed.

Embodiment 3

1) apply continuous basalt fiber Shu Jinhang with modified polypropene, obtained 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 needed reinforcement, surface of concrete structure is processed, make concrete surface smooth;

3) original position that basalt fibre prepreg tape is installed and final position is determined, and preset prepreg tape fastening devices in original position, then one end of basalt fibre prepreg tape is heated by fastening devices, heating-up temperature is at 170 ~ 180 DEG C, 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 the clamping realized prepreg tape fixed by described base plate and cover plate by the bolt after fastening;

4) at the two component modified epoxyn of the surface smear of the concrete component needed reinforcement, consumption is 300g/m 2;

5) other end of basalt fibre prepreg tape is connected with prepreg tape tensioning equipment, carries out stretch-draw, Shi Hanzhang by prepreg tape tensioning equipment clamping basalt fibre prepreg tape.The other end of basalt fibre prepreg tape is fixed on final position after moving controlling value (>=20KN ,≤40KN) to by prestressing force;

6) remove prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;

7) extrude bubble with cylinder along the roll extrusion of basalt fibre prepreg tape Impact direction, closely paste to make basalt fibre prepreg tape and concrete surface;

8) on the external surface of basalt fibre prepreg tape, lay compression plate material, the mode overstock by lower top implements compacting operation to the basalt fibre prepreg tape after stickup;

9) after basalt fibre prepreg tape, bonding adhesive solidify completely, pressurized sheet material is removed.

Embodiment 4

1) apply with modification of nylon 6 couples of continuous basalt fiber Shu Jinhang, obtained 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 needed reinforcement, surface of concrete structure is processed, make concrete surface smooth;

3) original position that basalt fibre prepreg tape is installed and final position is determined, and preset prepreg tape fastening devices in original position, then one end of basalt fibre prepreg tape is heated by fastening devices, heating-up temperature is at 220 ~ 230 DEG C, 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 the clamping realized prepreg tape fixed by described base plate and cover plate by the bolt after fastening;

4) at the two component modified epoxyn of the surface smear of the concrete component needed reinforcement, consumption is 400g/m 2;

5) other end of basalt fibre prepreg tape is connected with prepreg tape tensioning equipment, carries out stretch-draw, Shi Hanzhang by prepreg tape tensioning equipment clamping basalt fibre prepreg tape.The other end of basalt fibre prepreg tape is fixed on final position after moving controlling value (>=20KN ,≤40KN) to by prestressing force;

6) remove prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;

7) extrude bubble with cylinder along the roll extrusion of basalt fibre prepreg tape Impact direction, closely paste to make basalt fibre prepreg tape and concrete surface;

8) on the external surface of basalt fibre prepreg tape, lay compression plate material, the mode overstock by lower top implements compacting operation to the basalt fibre prepreg tape after stickup;

9) after basalt fibre prepreg tape, bonding adhesive solidify completely, pressurized sheet material is removed.

Above-mentioned is can understand and apply the invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.

Claims (9)

1. a method for reinforced concrete member, is characterized in that: it comprises following steps:
1) with thermoplastic resin, continuous basalt fiber Shu Jinhang is applied, obtained thermoplastic resin-based basalt fibre prepreg tape;
2) determine the surf zone of the concrete component needed reinforcement, the surface of this concrete component is processed, make concrete surface smooth;
3) original position that basalt fibre prepreg tape is installed and final position is determined, and preset prepreg tape fastening devices in original position, then the one end of thermoplastic resin-based basalt fibre prepreg tape step (1) prepared is heated by fastening devices, is fixed on original position;
4) at the surface smear bonding adhesive of the concrete component needed reinforcement;
5) other end of basalt fibre prepreg tape is connected with prepreg tape tensioning equipment, stretch-draw is carried out by prepreg tape tensioning equipment clamping basalt fibre prepreg tape, Shi Hanzhang, after prestressing force moves controlling value to, is fixed on final position by the other end of basalt fibre prepreg tape;
6) remove prepreg tape tensioning equipment, cut off unnecessary basalt fibre prepreg tape;
7) extrude bubble with cylinder along the roll extrusion of basalt fibre prepreg tape Impact direction, closely paste to make basalt fibre prepreg tape and concrete surface; The external surface of basalt fibre prepreg tape is laid compression plate material, and the mode overstock by lower top implements compacting operation to the basalt fibre prepreg tape after stickup;
8) after basalt fibre prepreg tape, bonding adhesive solidify completely, the pressurized sheet material in step (7) is removed;
In thermoplastic resin-based basalt fibre prepreg tape obtained in described step (1), the mass fraction of basalt fibre is 50 ~ 60%, and the mass fraction of thermoplastic resin is 40 ~ 50%;
Bonding adhesive in described step (4) is two component modified epoxyns, and consumption is 200 ~ 400g/m 2;
Fastening devices in 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 the clamping realized prepreg tape fixed by described base plate and cover plate by the bolt after fastening.
2. method according to claim 1, is characterized in that: thermoplastic resin is selected from described step (1): one or more in vistanex, polyamide, Corvic, polystyrene resin, polycarbonate resin, polyphenylene oxide resin or polysulfone resin.
3. method according to claim 1, is characterized in that: be applied to dual coating in described step (1).
4. method according to claim 1, is characterized in that: in described step (1), prepreg tape thickness is 0.22 ~ 0.28mm.
5. method according to claim 1, it is characterized in that: in described step (2), surface-treated step is: to concrete surface emery wheel or the polishing of angle grinding machine of being stuck, until expose new concrete interface completely, and with compressed air, floating for surface ash is removed clean, the corner of basalt fibre prepreg tape is carried out to chamfered and is polished into arc-shaped.
6. method according to claim 1, is characterized in that: the heating-up temperature of fixing prepreg tape in described step (3) is 160 ~ 240 DEG C.
7. method according to claim 1, is characterized in that: the prestressed controlling value of described step (5) is 20 ~ 40KN.
8. method according to claim 1, is characterized in that: in described step (7), the enforcement pressure of compacting operation is 10 ~ 20KN/m 2.
9. method according to claim 1, is characterized in that: the pressurized sheet material in described step (8) is selected from laminate stacked together or cystosepiment, and wherein the external surface of cystosepiment is laid with plastics mould release membrance, directly contacts prepreg tape.
CN201110264120.9A 2011-09-07 2011-09-07 A kind of method of reinforced concrete member CN102979315B (en)

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Publication number Priority date Publication date Assignee Title
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)
WO2019203756A2 (en) * 2018-04-20 2019-10-24 Kordsa Teknik Tekstil A.S. Use of prepregs in structures as a reinforcing material

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JPH0978853A (en) * 1995-09-11 1997-03-25 Arisawa Mfg Co Ltd Method of reinforcing concrete structure
JP3586338B2 (en) * 1996-06-10 2004-11-10 新日本製鐵株式会社 Reinforcement method of asphalt laid concrete structure
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