CN107386675A - Non-load-bearing concrete strengthening member restorative procedure - Google Patents

Non-load-bearing concrete strengthening member restorative procedure Download PDF

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Publication number
CN107386675A
CN107386675A CN201710443112.8A CN201710443112A CN107386675A CN 107386675 A CN107386675 A CN 107386675A CN 201710443112 A CN201710443112 A CN 201710443112A CN 107386675 A CN107386675 A CN 107386675A
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CN
China
Prior art keywords
solidification
concrete
carbon cloth
load
fracture
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Pending
Application number
CN201710443112.8A
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Chinese (zh)
Inventor
陈亦文
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陈亦文
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Priority to CN201710443112.8A priority Critical patent/CN107386675A/en
Publication of CN107386675A publication Critical patent/CN107386675A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

The invention discloses a kind of non-load-bearing concrete strengthening member restorative procedure, comprise the following steps that successively:Unwrapping wire positions, and fracture shows to handle, and drills, cleaning drilling, reinforcing bar derusting, prepares anchoring adhesive, chemically-planted steel bar, one-step solidification, is surface-treated smooth, the stirring of binding agent, brushing primer, carbon cloth reinforcement, secondary solidification, appearance surfaces moditied processing, detection.With chemically-planted steel bar and CFRP strengthening techniques, the fracture disease of non-load-bearing concrete component is reinforced, can solve the problem that a big technical barrier of Architectural Heritage protection long felt.With this advanced technology, disease component can either be avoided to be removed, abandoned so as to lose the wrong-doing of historical information so that away structure is recycled again, remains historical information well, and can solves destruction of traditional reinforcement means to architectural style, achieves many things at one stroke.

Description

Non-load-bearing concrete strengthening member restorative procedure
【Technical field】
The present invention relates to the reparation of Architectural Heritage and protection, and new material, new technology are especially applied to building text Change the reparation and protection of legacy.
【Background technology】
In Modern Architectural Heritage, the concrete component of a large amount of non-bearings be present, these components belong to decoration mostly Class component, often contain the epoch memory in specific epoch, specific humane history environment, be the important of research cultural heritage " key ".
Influenceed by nature or human factor, concrete component fracture is common building disease.The value of cultural heritage It is to contain specific historical information, its core mission repaired is as much as possible to retain original remnants in kind and appropriate Ground is shown.This requires the reparation to building element, should not take the technique changed or copied, but passes through and repair, and protects Stay its original looks.
Due to lacking corresponding technical specification and standard, when countries in the world today repairs these cultural heritages, to fracture Component often using removing the way that renews.It is to cause lossing for real history information through fruit.Or take mortar reinforcement Or the method that shape is reinforced.Such reparation, or insufficient strength, are broken again after the several years, or intensity is enough, but The outward appearance looks of component are destroyed.
【The content of the invention】
The purpose of the present invention is exactly to solve the problems of the prior art, with chemically-planted steel bar and CFRP strengthening techniques, is added Gu the fracture disease of non-load-bearing concrete component, it can solve the problem that a big technology of Architectural Heritage protection long felt is difficult Topic.With this advanced technology, disease component can either be avoided to be removed, abandoned so as to lose the wrong-doing of historical information, So that away structure is recycled again, historical information is remained well, can solve the problem that traditional reinforcement means to building again The destruction of style, achieves many things at one stroke.
To achieve the above object, the present invention proposes a kind of non-load-bearing concrete strengthening member restorative procedure, includes successively Following processing step:
A) unwrapping wire positions:Concrete fracture part is docked to reset condition, positioning, unwrapping wire, sign bore position, size, The depth;
B) break surface is handled:With electric angle grinder polishing concrete fracture surface, with hair-dryer by concrete fracture table Face floating dust is blown off;
C) drill:Drilled with electric hammer;
D) cleaning drilling:With dust in air compressor machine blowout bar planting hole, dip in acetone with hairbrush or staple and wipe bar planting hole Only, it is stand-by with staple closure bar planting aperture;
E) reinforcing bar derusts:Iron rust, the oil removal of steel anchorage length scope are clean, and reinforcing bar, the cyan oxidation of bolt are outer Skin removes, and polish metallic luster;
F) anchoring adhesive is prepared:The anchoring adhesive uses modified epoxy;
G) chemically-planted steel bar:Anchoring adhesive is directly flowed, smash into hole by upright opening bar planting, lateral aperture bar planting 6 thin steel of Φ Muscle coordinates support offset plate, and toward glue is smash in hole, in anchoring adhesive ostium, reinforcing bar, bolt enter hole using rotation or hand hammer impact method;
H) one-step solidification:Normal temperature stands solidification;
I) it is surface-treated smooth:The concrete fracture surface after one-step solidification is polished flat with electric angle grinder;
J) stirring of binding agent:The binding agent is modified epoxy or reinforcement application glue;
K) brushing primer:Binding agent is uniformly applied to concrete fracture surface with rotary broom or hairbrush;
L) carbon cloth reinforcement:Binding agent is uniformly applied to concrete fracture surface with rotary broom, cuts carbon cloth, Carbon cloth is pasted onto concrete fracture surface, rolled repeatedly in the same direction to viscous on carbon cloth surface with smooth roller Carbon cloth outer surface is oozed out in knot agent, to remove bubble removing, carbon cloth is fully infiltrated binding agent, again in the outer of carbon cloth Uniformly smear a layer binder in surface;
M) secondary solidification:Alite paste solidifies at normal temperatures, a length of 70~74 hours during solidification;
N) appearance surfaces moditied processing:The cement and river sand of selection material similar with former concrete make stem material, penetrate into 25% Phenylpropyl alcohol mixing cement stabilization mortar, the concrete fracture surface after the secondary solidification of application, step is repaired to concrete structure to reduce The organoleptic effects of part primitivism, the mortar color such as mixing is inconsistent still with building primitivism, adds inorganic mineral pigments Mixed colours.
O) detect:It can inspect by random samples at random within 3~4 days after bar planting, the system that examining can use jack, anchorage, reaction frame to form is made Pull-out test.
Preferably, the modified epoxy includes following components and the mass ratio of each component is:Epoxy resin:95 ~105 parts, acetone:60~70 parts, polyamide:10~15 parts, polybutadiene rubber:6~10 parts.
Preferably, described modified epoxy includes following components and the mass ratio of each component is:Epoxy resin: 100 parts, acetone:65 parts, polyamide:12 parts, polybutadiene rubber:8 parts.
Mechanical agitation is used preferably, described modified epoxy, during preparation, agitator is by electric hammer and stirrer gear group Into stirrer gear uses electric hammer drill, the reinforcing bars of electric hammer drill end welding cross Φ 14,10 minutes is stirred to mixing with agitator Stirred in the same direction untill uniformly, during stirring, avoid being mixed into air and form bubble.
Preferably, the one-step solidification, reinforcing bar, day must not be disturbed when daily mean temperature is not less than 25 DEG C in 12 hours Reinforcing bar must not be disturbed in 24 hours when temperature on average is less than 25 DEG C, if solidification temperature is not less than 25 DEG C, a length of 45 when solidifying~ 50 hours, if solidification temperature is less than 25 DEG C and is higher than 5 DEG C, a length of 70~75 hours when solidifying, if solidification temperature is not higher than 5 DEG C, then a length of 95~98 hours when solidifying.
Preferably, carbon cloth of the carbon cloth for building reinforcing, corresponding per weight per square meter 200g to 300g Thickness 0.111mm~0.167mm.
Beneficial effects of the present invention:The present invention is easy to operate, and process costs are low, are used in combination with chemically-planted steel bar, carbon fiber reinforcement Method, the anti-folding of component after reinforcing, shearing resistance are strong.The unidirectional tensile strength in carbon fiber reinforcement surface is high, is the 7~10 of regular reinforcement Times, and modulus of elasticity is high.The stable performance in moist, erosion environment, the erosion of acid, alkali, salt and water can be resisted.Reinforcement means is hidden Cover, outward appearance change is small, complies fully with the basic norm of historical relic's protection, beneficial to the displaying of historical information.
【Embodiment】
The present invention is non-load-bearing concrete strengthening member restorative procedure, and to achieve the above object, the present invention proposes one kind Non-load-bearing concrete strengthening member restorative procedure, is comprised the following steps that successively:
A) unwrapping wire positions:Concrete fracture part is docked to reset condition, positioning, unwrapping wire, sign bore position, size, The depth;
B) break surface is handled:With electric angle grinder polishing concrete fracture surface, with hair-dryer by concrete fracture table Face floating dust is blown off;
C) drill:Drilled with electric hammer.If strength grade of concrete is not less than C20, II grade of (III grade) level spiral, Q235, Q345 grade bolt and 5.6 grades of screw rods, drill hole depth 15d, and single pull-out test anchor force is more than steel surrender force value.Circle Steel or screw rod, drilling depth are further added by 5d~10d.
If strength grade of concrete is less than C20, or the bar planting on plain concrete or rock, anchorage depth should be increased.
Drilling effective depth is counted from the solid concrete of component surface.
Drilling can not be arranged in the protective layer and decorative layer of component.
D) cleaning drilling:With dust in air compressor machine blowout bar planting hole, dip in acetone with hairbrush or staple and wipe bar planting hole Only, it is stand-by with staple closure bar planting aperture;
E) reinforcing bar derusts:Iron rust, the oil removal of steel anchorage length scope are clean, and reinforcing bar, the cyan oxidation of bolt are outer Skin removes, and polish metallic luster;
F) anchoring adhesive is prepared:The anchoring adhesive uses modified epoxy.Modified epoxy has foot as anchoring adhesive Enough intensity and appropriate mobility, concrete pore, increase bonding density can be goed deep into, and be closely bonded with bar planting.
Preferably, described modified epoxy includes following components and the mass ratio of each component is:Epoxy resin: 100 parts, acetone:65 parts, polyamide:12 parts, polybutadiene rubber:8 parts.Mechanical agitation is used during preparation, agitator is by electric hammer Formed with stirrer gear, stirrer gear uses electric hammer drill, the reinforcing bars of electric hammer drill end welding cross Φ 14,10 is stirred with agitator Stirred in the same direction minute untill well mixed, during stirring, avoid being mixed into air and form bubble.
G) chemically-planted steel bar:Anchoring adhesive is directly flowed, smash into hole by upright opening bar planting, lateral aperture bar planting 6 thin steel of Φ Muscle coordinates support offset plate, and toward glue is smash in hole, in anchoring adhesive ostium, reinforcing bar, bolt enter hole using rotation or hand hammer impact method.Plant Muscle glue loading should ensure that insertion reinforcing bar rear perimeter edge has anchoring adhesive spilling, represent that anchoring adhesive has been filled.
H) one-step solidification:Normal temperature stands solidification.
Preferably, the one-step solidification, reinforcing bar, day must not be disturbed when daily mean temperature is not less than 25 DEG C in 12 hours Reinforcing bar must not be disturbed in 24 hours when temperature on average is less than 25 DEG C, if solidification temperature is not less than 25 DEG C, a length of 45 when solidifying~ 50 hours, if solidification temperature is less than 25 DEG C and is higher than 5 DEG C, a length of 70~75 hours when solidifying, if solidification temperature is not higher than 5 DEG C, then a length of 95~98 hours when solidifying.
I) it is surface-treated smooth:The concrete fracture surface after one-step solidification is polished flat with electric angle grinder;
J) stirring of binding agent:The binding agent is modified epoxy or reinforcement application glue, is matched somebody with somebody temporarily at the scene Put, the configuration amount of each binding agent is limited with being once finished.
K) brushing primer:Binding agent is uniformly applied to concrete fracture surface with rotary broom or hairbrush;
L) carbon cloth reinforcement:Binding agent is uniformly applied to concrete fracture surface with rotary broom, cuts carbon cloth, Carbon cloth is pasted onto concrete fracture surface, rolled repeatedly in the same direction to viscous on carbon cloth surface with smooth roller Carbon cloth outer surface is oozed out in knot agent, to remove bubble removing, carbon cloth is fully infiltrated binding agent, again in the outer of carbon cloth Uniformly smear a layer binder in surface.
Preferably, carbon cloth of the carbon cloth for building reinforcing, corresponding per weight per square meter 200g to 300g Thickness 0.111mm~0.167mm.
M) secondary solidification:Alite paste solidifies at normal temperatures, a length of 70~74 hours during solidification;
N) appearance surfaces moditied processing:The cement and river sand of selection material similar with former concrete make stem material, penetrate into 25% Phenylpropyl alcohol mixing cement stabilization mortar, the concrete fracture surface after the secondary solidification of application, step is repaired to concrete structure to reduce The organoleptic effects of part primitivism, the mortar color such as mixing is inconsistent still with building primitivism, adds inorganic mineral pigments Mixed colours.
O) detect:It can inspect by random samples at random within 3~4 days after bar planting, the system that examining can use jack, anchorage, reaction frame to form is made Pull-out test.
Above-described embodiment is the description of the invention, is not limitation of the invention, it is any to simple transformation of the present invention after Scheme belong to protection scope of the present invention.

Claims (6)

  1. A kind of 1. non-load-bearing concrete strengthening member restorative procedure, it is characterised in that:Comprise the following steps that successively:
    A) unwrapping wire positions:Concrete fracture part is docked to reset condition, positioning, unwrapping wire, sign bore position, size, the depth;
    B) break surface is handled:With electric angle grinder polishing concrete fracture surface, concrete fracture surface is floated with hair-dryer Dirt is blown off;
    C) drill:Drilled with electric hammer;
    D) cleaning drilling:With dust in air compressor machine blowout bar planting hole, acetone is dipped in by bar planting hole wiped clean, use with hairbrush or staple Staple closure bar planting aperture is stand-by;
    E) reinforcing bar derusts:Iron rust, the oil removal of steel anchorage length scope are clean, and reinforcing bar, the cyan oxidation crust of bolt remove Go, and polish metallic luster;
    F) anchoring adhesive is prepared:The anchoring adhesive uses modified epoxy;
    G) chemically-planted steel bar:Anchoring adhesive is directly flowed, smash into hole by upright opening bar planting, and lateral aperture bar planting is matched somebody with somebody with the fine steel ribs of Φ 6 Support offset plate is closed toward glue is smash in hole, in anchoring adhesive ostium, reinforcing bar, bolt enter hole using rotation or hand hammer impact method;
    H) one-step solidification:Normal temperature stands solidification;
    I) it is surface-treated smooth:The concrete fracture surface after one-step solidification is polished flat with electric angle grinder;
    J) stirring of binding agent:The binding agent is modified epoxy or reinforcement application glue;
    K) brushing primer:Binding agent is uniformly applied to concrete fracture surface with rotary broom or hairbrush;
    L) carbon cloth reinforcement:Binding agent is uniformly applied to concrete fracture surface with rotary broom, carbon cloth is cut, by carbon Fiber cloth is pasted onto concrete fracture surface, is rolled repeatedly in the same direction to binding agent on carbon cloth surface with smooth roller Carbon cloth outer surface is oozed out, to remove bubble removing, carbon cloth is fully infiltrated binding agent, again in the outer surface of carbon cloth Uniformly smear a layer binder;
    M) secondary solidification:Alite paste solidifies at normal temperatures, a length of 70~74 hours during solidification;
    N) appearance surfaces moditied processing:The cement and river sand of selection material similar with former concrete make stem material, penetrate into 25% phenylpropyl alcohol Mixing cement stabilization mortar, the concrete fracture surface after the secondary solidification of application, step is repaired to concrete component original to reduce The organoleptic effects of beginning style, the mortar color such as mixing is inconsistent still with building primitivism, adds inorganic mineral pigments and carries out Toning.
    O) detect:It can inspect by random samples at random within 3~4 days after bar planting, drawing can be made with the system that jack, anchorage, reaction frame form by examining Experiment.
  2. A kind of 2. non-load-bearing concrete strengthening member restorative procedure as described in claim 1, it is characterised in that:The step Modified epoxy in f includes following components and the mass ratio of each component is:Epoxy resin:95~105 parts, acetone:60 ~70 parts, polyamide:10~15 parts, polybutadiene rubber:6~10 parts.
  3. A kind of 3. non-load-bearing concrete strengthening member restorative procedure as described in claim 2, it is characterised in that:The modification Epoxy resin includes following components and the mass ratio of each component is:Epoxy resin:100 parts, acetone:65 parts, polyamide:12 Part, polybutadiene rubber:8 parts.
  4. A kind of 4. non-load-bearing concrete strengthening member restorative procedure as described in claim 1, it is characterised in that:The step Modified epoxy in f, mechanical agitation is used during preparation, agitator is made up of electric hammer and stirrer gear, and stirrer gear uses electric hammer Drill bit, the reinforcing bars of electric hammer drill end welding cross Φ 14,10 minutes are stirred untill well mixed with agitator, edge during stirring Same direction stirs, and avoids being mixed into air formation bubble.
  5. A kind of 5. non-load-bearing concrete strengthening member restorative procedure as described in claim 1, it is characterised in that:The step H one-step solidification, reinforcing bar must not be disturbed in 12 hours when daily mean temperature is not less than 25 DEG C, when daily mean temperature is less than 25 DEG C Reinforcing bar must not be disturbed in 24 hours, if solidification temperature is not less than 25 DEG C, a length of 45~50 hours when solidifying, if solidification temperature is low In 25 DEG C and higher than 5 DEG C, then a length of 70~75 hours when solidifying, if solidification temperature is not higher than 5 DEG C, a length of 95~98 when solidifying Hour.
  6. A kind of 6. non-load-bearing concrete strengthening member restorative procedure as described in claim 1, it is characterised in that:The step L carbon cloth is builds the carbon cloth of reinforcing, per weight per square meter 200g to 300g, corresponding thickness 0.111mm~ 0.167mm。
CN201710443112.8A 2017-06-13 2017-06-13 Non-load-bearing concrete strengthening member restorative procedure Pending CN107386675A (en)

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Application Number Priority Date Filing Date Title
CN201710443112.8A CN107386675A (en) 2017-06-13 2017-06-13 Non-load-bearing concrete strengthening member restorative procedure

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CN107386675A true CN107386675A (en) 2017-11-24

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1851202A (en) * 2006-05-26 2006-10-25 上海大学 Steel reinforced concrete rectangular column reinforcing method
CN104675135A (en) * 2013-11-29 2015-06-03 卜海军 Repairing method of carved stone cave eaves of stone cave temple
CN105386610A (en) * 2015-12-09 2016-03-09 广州市恒盛建设工程有限公司 Protective construction method for natural-foundation ancient architectures at top of asymmetric deep foundation pit
CN106121264A (en) * 2016-06-23 2016-11-16 青岛海川建设集团有限公司 Postinstalled chemically rebar construction technology

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1851202A (en) * 2006-05-26 2006-10-25 上海大学 Steel reinforced concrete rectangular column reinforcing method
CN104675135A (en) * 2013-11-29 2015-06-03 卜海军 Repairing method of carved stone cave eaves of stone cave temple
CN105386610A (en) * 2015-12-09 2016-03-09 广州市恒盛建设工程有限公司 Protective construction method for natural-foundation ancient architectures at top of asymmetric deep foundation pit
CN106121264A (en) * 2016-06-23 2016-11-16 青岛海川建设集团有限公司 Postinstalled chemically rebar construction technology

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
兰州铁路局职教处,兰州铁路局人事处,兰州铁路局工务处: "《桥隧维修单项作业标准》", 31 December 2014 *
马东卫: "《胶粘剂制备及应用》", 30 September 1998 *

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Application publication date: 20171124