CN102199951A - Construction method for reinforcing concrete structure by using carbon fibers - Google Patents
Construction method for reinforcing concrete structure by using carbon fibers Download PDFInfo
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- CN102199951A CN102199951A CN2011100333523A CN201110033352A CN102199951A CN 102199951 A CN102199951 A CN 102199951A CN 2011100333523 A CN2011100333523 A CN 2011100333523A CN 201110033352 A CN201110033352 A CN 201110033352A CN 102199951 A CN102199951 A CN 102199951A
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Abstract
The invention relates to a construction method for reinforcing a concrete structure by using carbon fibers, belonging to the technical field of building constructions. The construction method comprises the following construction steps of: (1) carrying out a concrete foundation treatment; (2) coating priming paint; (3) carrying out incomplete part repair by utilizing epoxy putties; (4) sticking carbon fiber sheets; and (5) curing. The construction method disclosed by the invention has the advantages of simple and rapid construction, no need of any clamp, mould plate and support and low construction cost, and is suitable for each type of reinforced concrete structure or reinforcement and enhancement of the member, reinforced concrete structures, such as bridges, industrial and civil buildings and special structures, high-rise structures, impounding reservoirs, jars, culverts, tunnels, wharfs and harbors and the like, and is also suitable for the repair and enhancement of the structures.
Description
Technical field
The invention belongs to technical field of building construction, particularly a kind of job practices of reinforced concrete structure.
Background technology
The job practices of existing reinforced concrete structure comprises conventional methods such as steel plate reinforcement, concrete reinforcement, in construction, need to carry out numerous and diverse operation and supporting facility such as bar planting anchoring, mounting or dismounting anchor clamps, formwork erection, support, concrete perfusion, maintenance, form removal, and it is big to take up room.
Summary of the invention
For solving numerous and diverse, the big problem that takes up room of job practices construction of existing reinforced concrete structure, the invention provides a kind of job practices of using the carbon fiber reinforced concrete structure, comprise following sequential steps:
(1) cast concrete base is handled
To the crack of width less than 0.2mm, carry out the surface with epoxy resin and smear sealing, the crack of width between the 0.2-1mm epoxy resin cementation of fissures, width carry out the pressure encapsulating greater than the crack of 1mm to be handled;
Incompleteness, the damaged portion of surface of concrete structure are removed totally, made its surfacing;
The surface of concrete structure projection is polished flat; Property at parts of edges and corners is worn into fillet with sanding machine, and radius of corner is more than 30mm;
(2) priming operation coating
Get following proportion raw material: host 100g, solidify and urge into agent 1g to 6g;
Earlier urge into agent by the container of packing into above-mentioned host and curing, evenly stirred 8-10 minute with agitator, stop to stir 1-3 minute after, in container, add 1 to 3ml curing compound, evenly stirred 8-10 minute with agitator, a subharmonic amount used in 1 hour;
The above-mentioned subbing for preparing is painted on surface of concrete structure equably with rotary broom, carries out the construction of next process behind the dry to touch;
Behind the subbing dry to touch, lip-deep bossing will polish with emery cloth or angle grinding machine, carries out the construction of next process behind the dry to touch;
(3) carrying out incompleteness with epoxy putty repairs
More than temperature-5 ℃, relative humidity RH less than 85% condition under, with epoxy putty the surface of concrete structure position of caving in is filled and led up, with epoxy putty fill up surface of concrete structure the section poor, arch camber position, make it smooth-going, the concavo-convex rough line after will filling and leading up with sand paper then polishes flat;
(4) paste carbon fiber sheet
(4.1) intercepting carbon fiber sheet: with straight steel ruler and wallpaper cutter intercepting carbon fiber sheet, every segment length is below 6m;
(4.2) preparation binding resin:
Get following materials of weight proportions: host 100 g, curing compound 0.8 to 5 g;
With above-mentioned host and the curing compound container of packing into, evenly stirred 8-10 minute with agitator, a subharmonic amount used in 1 hour;
(4.3) at temperature be more than-10 ℃, relative humidity less than 85% condition under, on subbing, paste one deck carbon fiber sheet, be coated with under comprising, paster, on be coated with three steps;
Being coated with step under described is meant with rotary broom smears binding resin equably on subbing;
Described paster step is meant pastes carbon fiber sheet on binding resin, during stickup, the air extrusion between carbon fiber sheet and the binding resin is discharged, after stickup is finished, more than twice, the binding resin maceration is advanced in the carbon fiber sheet in roll extrusion on the carbon fiber sheet along machine direction with roller;
Be coated with step on described and be meant in the paster step and finish, and maintenance evenly smears binding resin with rotary broom after 30 minutes on carbon fiber sheet, carry out the construction of next process behind the dry to touch;
(5) maintenance
Be under 60% to 85% the condition natural curing 1-2 hour for-10 ℃ to 30 ℃, relative humidity with above-mentioned carbon fiber sheet, reach initial cure, do not collided during the initial cure, continue 1 ~ 2 week of maintenance after the initial cure, reach fully and solidify at temperature.
The present invention is that a kind of high strength of carbon fiber sheet of utilizing is as the construction technology of reinforcing various load-carrying members, employed carbon fiber sheet is with the high carbon fiber wire drawing moulding of tensile strength, unidirectional array, and by giving a preparation method moulding, forming unidirectional array is the composite material of matrix with the resin, it has extremely superior quality, tensile strength is big, the modulus of elasticity height, proportion is little, the fatigue resistance height, excellent in durability, wear-resistant, anticorrosive, creep and coefficient of thermal expansion is little and it is simple and direct to construct, the work efficiency height, require low to construction space, be convenient to can adapt to the renovation reinforced of various labyrinth profiles in series of advantages such as narrow space operations, very little to the influence of construction weight;
The renovation reinforced technology easy construction of carbon fiber of the present invention is rapid, need not any anchor clamps, template and support, though the price of carbon fiber itself is higher than other materials, but operating expenses reduces greatly, job practices of the present invention has been exempted steel plate reinforcement, the bar planting anchoring that conventional methods such as concrete reinforcement are required, the mounting or dismounting anchor clamps, formwork erection, support, concrete perfusion, maintenance, operation that form removal etc. are numerous and diverse and supporting facility, and it is little to take up room, even in work high above the ground, also only simple and easy working platform need be set gets final product, be applicable to the reinforcement and strengthening of various forms of reinforced concrete structures or member, bridge, industry and civilian construction and unique construction, tall and slender structure, reservoir, jar, culvert, the tunnel, the harbour harbour, Deng reinforced concrete structures, the reparation of structure, reinforcement.
As preferred version of the present invention, in the described step (4.3), on described carbon fiber sheet, also paste one deck carbon fiber sheet at least above the coating, the preparation binding resin process that needs repeating said steps (4.2) before every stickup one deck carbon fiber sheet, be coated with under every stickup one deck carbon fiber sheet comprises, paster, on be coated with three steps;
The described step that is coated with down is meant with rotary broom smears binding resin above the coating equably on preceding one deck carbon fiber sheet;
Described paster step is meant pastes carbon fiber sheet on binding resin, during stickup, the air extrusion between carbon fiber sheet and the resin is discharged, after stickup is finished, more than twice, the binding resin maceration is advanced in the carbon fiber sheet in roll extrusion on the carbon fiber sheet along machine direction with roller;
Be coated with step on described and be meant in the paster step and finish, and after waiting for 30 minutes, on carbon fiber sheet, evenly smear binding resin, carry out the construction of next process behind the dry to touch with rotary broom.
In the such scheme, in the paster step in the described step (4.3), carbon fiber sheet also needs to overlap along length direction at fiber, more than the long 10cm of the joint of its lap-joint, and the thick 0.6 ~ 1.0mm of last coating binding resin of joint.
As a further improvement on the present invention, in the such scheme, after the needed time of dry to touch in described step (2), the step (4.3) is meant that the construction of subbing or binding resin is finished, maintenance 3 ~ 24 hours;
In the described step (2), the host that the preparation subbing is used is epoxy resin;
In the described step (4), the host that the preparation binding resin is used is epoxy resin;
After dry to touch in described step (2), the step (4.3) is meant that subbing or binding resin construction are finished, maintenance 3 ~ 24 hours.
Further improve as of the present invention, in the described step (1) of such scheme, the crack is sealed or the cementation of fissures or pressure encapsulating when handling, in advance the protection mortar around the crack is rejected, and with sander concrete structural surface be polished in the position that will paste carbon fiber sheet;
In the described step (1), when the processing of pressure encapsulating is carried out in the crack, dig out the V-type groove of wide 20mm, dark 10mm, then glue be poured in the V-type groove naturally osmotic 24 hours at the place, crack;
In the described step (4.1), the wide 100mm of carbon fiber sheet;
In the described step (4.3), in the paster step, the carbon fiber sheet of being pasted is perpendicular to crackle, and the spacing between adjacent two carbon fiber sheets is 200mm, and carbon fiber sheet stretches out more than the 600mm in the crackle both sides.
When described crack during at the foundation place, in the described step (4.3), under be coated with step before, dig out hole at the foundation place in advance, the degree of depth in institute borehole hole is greater than 400mm, the spacing between adjacent two carbon fiber sheets is 100mm.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is in the step of the present invention (1), with the schematic diagram after 3 rejectings of the protection mortar around the crack 1;
Fig. 2 is in the step of the present invention (1), and when encapsulating was handled, 1 place dug out the schematic diagram of V-type groove in the crack;
Fig. 3 pastes the schematic diagram of carbon fiber sheet 5 in the step of the present invention (4.3) at crackle 1 place;
Fig. 4 is in the step of the present invention (4.3), and the schematic diagram of carbon fiber sheet 5 is pasted in crack 1 when foundation.
The specific embodiment
Embodiment one:
Use the job practices of carbon fiber reinforced concrete structure, comprise following sequential steps:
(1) cast concrete base is handled
Before the carbon fiber reinforcement construction, should shed fractional load as much as possible, the load action that structure or member bear when making the carbon fiber sticking construction is reduced to minimum degree, then as shown in Figure 1, protection mortar around the crack 13 is rejected, and in the position that will paste carbon fiber sheet 5 with sander with concrete component 2 surface rubbings, to the crack 1 of width less than 0.2mm, carry out the surface with epoxy resin and smear sealing, the crack 1 epoxy resin cementation of fissures of width between 0.2-1mm, width carries out the pressure encapsulating greater than the crack 1 of 1mm to be handled, when encapsulating is handled, as shown in Figure 2, dig out wide 20mm in 1 place in the crack, the V-type groove 4 of dark 10mm, then glue is poured in the V-type groove 4 naturally osmotic 24 hours;
Incompleteness, the damaged portion on concrete component 2 surfaces are removed totally, reached the closely knit position of structure, make its surfacing;
With concrete component 2 surperficial projections, comprise that the position, segment difference section of concrete component 2 handing-over positions, template polishes flat, the section difference after the reparation is smooth-going as far as possible; Property at parts of edges and corners is worn into fillet with sanding machine, and radius of corner is more than 30mm;
(2) priming operation coating
Get following proportion raw material: host 100g, solidify and urge into agent 1g to 6g, described host is epoxy resin;
Earlier urge into agent by the container of packing into above-mentioned host and curing, evenly stirred 8-10 minute with agitator, stop to stir 1-3 minute after, in container, add 1 to 3ml curing compound, evenly stirred 8-10 minute with agitator, a subharmonic amount used in 1 hour;
The above-mentioned subbing for preparing is painted on concrete component 2 surfaces equably with rotary broom, carries out the construction of next process behind the dry to touch;
After subbing dry to touch or the curing, lip-deep bossing, the dewdrop part of similar dewfall will polish with emery cloth or angle grinding machine, and behind the dry to touch, i.e. maintenance was carried out the construction of next process after 3 ~ 24 hours;
(3) carrying out incompleteness with epoxy putty repairs
More than temperature-5 ℃, relative humidity less than 85% condition under, with epoxy putty concrete component 2 surface depressions positions are filled and led up, fill up poor, the arch camber position of concrete component 2 surface section with epoxy putty, make it smooth-going, the concavo-convex rough line after will filling and leading up with sand paper then polishes flat;
(4) paste carbon fiber sheet
(4.1) intercepting carbon fiber sheet 5: with straight steel ruler and wallpaper cutter intercepting carbon fiber sheet 5, every section carbon fiber sheet 5 wide 100mm, length is below 6m;
(4.2) preparation binding resin:
Get following materials of weight proportions: host 100 g, curing compound 0.8 to 5 g, described host is epoxy resin;
With above-mentioned host and the curing compound container of packing into, evenly stirred 8-10 minute with agitator, a subharmonic amount used in 1 hour;
(4.3) at temperature be more than-10 ℃, relative humidity less than 85% condition under, on subbing, paste two-layer above carbon fiber sheet 5, be coated with under every stickup one deck carbon fiber sheet 5 comprises, paster, on be coated with three steps;
Being coated with step first down is meant with rotary broom smears binding resin equably on subbing, the preparation binding resin process that before each time following is coated with step, needs later on repetition above-mentioned steps (4.2), then with rotary broom last once on smear binding resin above the coating equably;
Described paster step is meant pastes carbon fiber sheet 5 on binding resin, as shown in Figure 3, the carbon fiber sheet of being pasted 5 is perpendicular to crackle, and the spacing between adjacent two carbon fiber sheets 5 is 200mm, and carbon fiber sheet 5 stretches out more than the 600mm in the crackle both sides; During stickup, air extrusion between carbon fiber sheet 5 and the binding resin is discharged, after stickup is finished, with roller along machine direction roll extrusion more than twice on carbon fiber sheet 5, the binding resin maceration is advanced in the carbon fiber sheet 5, described roller is to rise in the textile machine to feed to give, drawing-off, output waits the cylindrical rotary part of effect, it is the transliteration of English word " roller ", the implication that roller and axle are arranged, be used for drawing-off, combing, mechanisms such as conveying, be divided into drawing rollers by role, feed roller, press roller, worker rollers etc., here the roller of Shi Yonging is a handheld tool, being exactly has a rotary roller bearing on the handle; Carbon fiber sheet 5 also needs to overlap along length direction at fiber, more than the long 10cm of the joint of its lap-joint, and thick 0.6 ~ 1.0 mm of last coating binding resin of joint;
Be coated with step on described and be meant in the paster step and finish, and maintenance evenly smears binding resin with rotary broom after 30 minutes on carbon fiber sheet 5, behind the dry to touch, i.e. maintenance was carried out the construction of next process after 3 ~ 24 hours; Be coated with on last one deck carbon fiber should brush evenly, periphery is neat;
(5) maintenance
Be under 60% to 85% the condition natural curing 1-2 hour for-10 ℃ to 30 ℃, relative humidity with above-mentioned carbon fiber sheet 5, reach initial cure, do not collided during the initial cure, continue 1 ~ 2 week of maintenance after the initial cure, reach fully and solidify at temperature.
Embodiment two:
Compare with the foregoing description one, its difference only is that described crack 1 is at the foundation place, in described step (4.3), under be coated with step before, as shown in Figure 4, dig out hole 6 at the foundation place in advance, the degree of depth in institute borehole hole 6 will make the carbon cloth symmetry about crackle reach 400mm, and the spacing along crack orientation between adjacent two carbon fiber sheets is 100mm.
Claims (6)
1. use the job practices of carbon fiber reinforced concrete structure, comprise following sequential steps:
(1) cast concrete base is handled
To the crack of width less than 0.2mm, carry out the surface with epoxy resin and smear sealing, the crack of width between the 0.2-1mm epoxy resin cementation of fissures, width carry out the pressure encapsulating greater than the crack of 1mm to be handled;
Incompleteness, the damaged portion of surface of concrete structure are removed totally, made its surfacing;
The surface of concrete structure projection is polished flat; Property at parts of edges and corners is worn into fillet with sanding machine, and radius of corner is more than 30mm;
(2) priming operation coating
Get following proportion raw material: host 100g, solidify and urge into agent 1g to 6g;
Earlier urge into agent by the container of packing into above-mentioned host and curing, evenly stirred 8-10 minute with agitator, stop to stir 1-3 minute after, in container, add 1 to 3ml curing compound, evenly stirred 8-10 minute with agitator, a subharmonic amount used in 1 hour;
The above-mentioned subbing for preparing is painted on surface of concrete structure equably with rotary broom, carries out the construction of next process behind the dry to touch;
The subbing dry to touch, lip-deep bossing will polish with emery cloth or angle grinding machine, carries out the construction of next process behind the dry to touch;
(3) carrying out incompleteness with epoxy putty repairs
More than temperature-5 ℃, relative humidity less than 85% condition under, with epoxy putty the surface of concrete structure position of caving in is filled and led up, with epoxy putty fill up surface of concrete structure the section poor, arch camber position, make it smooth-going, the concavo-convex rough line after will filling and leading up with sand paper then polishes flat;
(4) paste carbon fiber sheet
(4.1) intercepting carbon fiber sheet: with straight steel ruler and wallpaper cutter intercepting carbon fiber sheet, every segment length is below 6m;
(4.2) preparation binding resin:
Get following materials of weight proportions: host 100 g, curing compound 0.8 to 5 g;
With above-mentioned host and the curing compound container of packing into, evenly stirred 8-10 minute with agitator, a subharmonic amount used in 1 hour;
(4.3) at temperature be more than-10 ℃, relative humidity less than 85% condition under, on subbing, paste one deck carbon fiber sheet, be coated with under comprising, paster, on be coated with three steps;
Being coated with step under described is meant with rotary broom smears binding resin equably on subbing;
Described paster step is meant pastes carbon fiber sheet on binding resin, during stickup, the air extrusion between carbon fiber sheet and the binding resin is discharged, after stickup is finished, more than twice, the binding resin maceration is advanced in the carbon fiber sheet in roll extrusion on the carbon fiber sheet along machine direction with roller;
Be coated with step on described and be meant in the paster step and finish, and maintenance evenly smears binding resin with rotary broom after 30 minutes on carbon fiber sheet, carry out the construction of next process behind the dry to touch;
(5) maintenance
Be under 60% to 85% the condition natural curing 1-2 hour for-10 ℃ to 30 ℃, relative humidity with above-mentioned carbon fiber sheet 5, reach initial cure, do not collided during the initial cure, continue 1 ~ 2 week of maintenance after the initial cure, reach fully and solidify at temperature.
2. the job practices of use carbon fiber reinforced concrete structure according to claim 1 is characterized in that:
In the described step (4.3), on described carbon fiber sheet, also paste one deck carbon fiber sheet at least above the coating, the preparation binding resin process that needs repeating said steps (4.2) before every stickup one deck carbon fiber sheet, be coated with under every stickup one deck carbon fiber sheet comprises, paster, on be coated with three steps;
The described step that is coated with down is meant with rotary broom smears binding resin above the coating equably on preceding one deck carbon fiber sheet;
Described paster step is meant pastes carbon fiber sheet on binding resin, during stickup, the air extrusion between carbon fiber sheet and the resin is discharged, after stickup is finished, more than twice, the binding resin maceration is advanced in the carbon fiber sheet in roll extrusion on the carbon fiber sheet along machine direction with roller;
Be coated with step on described and be meant in the paster step and finish, and after waiting for 30 minutes, on carbon fiber sheet, evenly smear binding resin, carry out the construction of next process behind the dry to touch with rotary broom.
3. the job practices of use carbon fiber reinforced concrete structure according to claim 2 is characterized in that:
In the paster step in the described step (4.3), carbon fiber sheet also needs to overlap along length direction at fiber, more than the long 10cm of the joint of its lap-joint, and thick 0.6 ~ 1.0 mm of last coating binding resin of joint.
4. the job practices of use carbon fiber reinforced concrete structure according to claim 3 is characterized in that:
After the needed time of dry to touch in described step (2), the step (4.3) is meant that the construction of subbing or binding resin is finished, maintenance 3 ~ 24 hours;
In the described step (2), the host that the preparation subbing is used is epoxy resin;
In the described step (4), the host that the preparation binding resin is used is epoxy resin;
After dry to touch in described step (2), the step (4.3) is meant that subbing or binding resin construction are finished, maintenance 3 ~ 24 hours.
5. the job practices of use carbon fiber reinforced concrete structure according to claim 4 is characterized in that:
In the described step (1), the crack is sealed or the cementation of fissures or pressure encapsulating when handling, in advance the protection mortar around the crack is rejected, and with sander concrete structural surface be polished in the position that will paste carbon fiber sheet;
In the described step (1), when the processing of pressure encapsulating is carried out in the crack, dig out the V-type groove of wide 20mm, dark 10mm, then glue be poured in the V-type groove naturally osmotic 24 hours at the place, crack;
In the described step (4.1), the wide 100mm of carbon fiber sheet;
In the described step (4.3), in the paster step, the carbon fiber sheet of being pasted is perpendicular to crackle, and the spacing between adjacent two carbon fiber sheets is 200mm, and carbon fiber sheet stretches out more than the 600mm in the crackle both sides.
6. the job practices of use carbon fiber reinforced concrete structure according to claim 4 is characterized in that:
Described crack is at the foundation place, in the described step (4.3), under be coated with step before, dig out hole at the foundation place in advance, the degree of depth in institute borehole hole is greater than 400mm, the spacing between adjacent two carbon fiber sheets is 100mm.
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| CN102561779A (en) * | 2012-02-17 | 2012-07-11 | 陈生金 | Barrel-shaped integral concrete water storage tower tank and preparation method thereof |
| CN102966246A (en) * | 2012-12-11 | 2013-03-13 | 上海市建筑科学研究院(集团)有限公司 | Method for sticking carbon fiber sheet to reinforce prestressed concrete core slab |
| CN103643804A (en) * | 2013-11-25 | 2014-03-19 | 昆明理工大学 | Corroded reinforced concrete beam repairing and strengthening method based on arch effect |
| CN104153594A (en) * | 2014-08-04 | 2014-11-19 | 同济大学 | Method for improving straight shear bearing force of reinforced concrete member |
| WO2015085806A1 (en) * | 2013-12-13 | 2015-06-18 | 深圳大学 | Method for reinforcing and protecting concrete using inorganic adhesive fiber composite material |
| WO2015085807A1 (en) * | 2013-12-13 | 2015-06-18 | 深圳大学 | Method for reinforcing and protecting concrete using fiber composite material |
| CN105431601A (en) * | 2013-06-06 | 2016-03-23 | Sika技术股份公司 | Arrangement and method for reinforcing supporting structures |
| CN105697037A (en) * | 2016-03-01 | 2016-06-22 | 河海大学 | Construction plant for repairing and strengthening tunnel lining structures |
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| CN102561779B (en) * | 2012-02-17 | 2015-01-07 | 陈生金 | Barrel-shaped integral concrete water storage tower tank and preparation method thereof |
| CN102561779A (en) * | 2012-02-17 | 2012-07-11 | 陈生金 | Barrel-shaped integral concrete water storage tower tank and preparation method thereof |
| CN102966246A (en) * | 2012-12-11 | 2013-03-13 | 上海市建筑科学研究院(集团)有限公司 | Method for sticking carbon fiber sheet to reinforce prestressed concrete core slab |
| CN105431601B (en) * | 2013-06-06 | 2017-09-29 | Sika技术股份公司 | System and method for reinforcing bearing structure |
| CN105431601A (en) * | 2013-06-06 | 2016-03-23 | Sika技术股份公司 | Arrangement and method for reinforcing supporting structures |
| CN103643804A (en) * | 2013-11-25 | 2014-03-19 | 昆明理工大学 | Corroded reinforced concrete beam repairing and strengthening method based on arch effect |
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Application publication date: 20110928 |