CN104594652B - A kind of xoncrete structure basic unit recovery technique improves elastic modulus of concrete intensity method - Google Patents
A kind of xoncrete structure basic unit recovery technique improves elastic modulus of concrete intensity method Download PDFInfo
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- CN104594652B CN104594652B CN201410743320.6A CN201410743320A CN104594652B CN 104594652 B CN104594652 B CN 104594652B CN 201410743320 A CN201410743320 A CN 201410743320A CN 104594652 B CN104594652 B CN 104594652B
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Abstract
A kind of xoncrete structure basic unit recovery technique improves elastic modulus of concrete intensity method and belongs to Reinforcement Technology of Concrete Structure field.The present invention utilizes Orlon and nanometer calcium silicate powder modified epoxide resin adhesive, by the method for concrete fluting perfusion modified adhesive is repaired concrete structural surface, to reach the effect of Concrete Structure structure impact strength.This technique process is easy, easily operates, and the shock resistance of xoncrete structure significantly improves, and consolidation effect is excellent, good stability, has preferable application prospect.
Description
Technical field
The invention belongs to Reinforcement Technology of Concrete Structure field.It is specifically related to a kind of high intensity, high stability, operation simplicity soon
Speed, can the Reinforcement Technology of Concrete Structure method of mechanized operation.Compared to conventional Reinforcement Technology of Concrete Structure method,
The method is efficient, high-strength, the advantage of high stability meets the requirement that concrete structure reinforcement is market-oriented, has wide application
Prospect.
Background technology
Technology and related specifications about concrete structure reinforcement are a lot of at present, and reinforcing engineering also ratio is wide.Wherein reinforce
Method generally comprises: 1) increasing section method for strengthening；2) displacement coagulation local method；3) additional prestressing；4) paste
Fiber composite material method for strengthening；5) affixing steel plate reinforcement method；6) setting support method for strengthening.
Although above-mentioned reinforcement means disclosure satisfy that the index of xoncrete structure structural behaviour and shock resistance, but from technique and
From the standpoint of durability, there is problems, specific as follows:
1) it is easily peeled off destruction: the end of paste is easily stuck up out or adhesive glue unstable properties, globality under harsh and unforgiving environments
Can be deteriorated, easily cause the stripping damage of paste；
2) reinforcement material cost is high: the cost of fiber cloth, fibre board and steel plate is the highest；
3) complicated construction technique: paste in fiber composite material method for strengthening and affixing steel plate reinforcement method, fiber composite material and steel plate
Cutting out making the most more complicated, structure dead angle is difficult；Increasing section method for strengthening, additional prestressing and setting support
The construction procedure of method for strengthening is loaded down with trivial details, and constructing operation level requirement is higher, and strengthening quality is all more difficult to get guarantee；
4) the xoncrete structure suitability reduces: due to surface mount fiber cloth or steel plate, and increasing section and setting support,
The appearance changing works the most in various degree, it is poor to reinforce apparent effect, makes structure use the suitability to reduce.
Summary of the invention
Present invention aim to address above-mentioned existing technical problem, the simple and practical xoncrete structure reparation of applying of creation adds
Solid method, its feature is as follows:
The index of quality of each component requires as follows:
Fiber: Orlon, fibre length at 12 ± 1mm, a diameter of 0.012 ± 0.005mm.Volume is adhesive
The 20% of volume；
Adhesive: utilize the adhesive that pnenolic aldehyde amine hardener and nanometer calcium silicate powder modified epoxy are prepared；
Epoxy resin: model E-51；
Diluent: acetone.Addition content is the 15% of E51 mass；
Pnenolic aldehyde amine hardener: density is 0.9～1.1g/mL, viscosity is 5000mPa.S, total amine number is 450+20KOH mg/g.
Addition content is the 30% of E51 mass；
Nanometer calcium silicate powder: fineness 3000 mesh, addition content is the 40% of E51 mass.
Reinforcing construction process is as follows:
Concrete structural surface processes: polished by concrete structural surface, is vertically pierced by concrete structural surface deep with electric drill
10mm～20mm, diameter 5mm～10mm, adjacent holes away from for 50～100mm multiple holes, and remove loosening granule and
Floating dust；
Adhesive: first acetone is put into agitation and dilution in E51, then nano-calcium carbonate is put into, be finally putting into phenolic aldehyde
Amine hardener, and agitated liquid is uniform no less than 2min to liquid, Adhesive completes；
Ground floor adhesive: first fill adhesive, and vibration compacting at concrete surface hole, more uniformly brush with hairbrush mixed
Solidifying soil surface, ground floor brushing adhesive stick 1 ± 0.3mm is thick；
Fibrous layer is laid: be uniformly paved with chopped fiber on the surface of ground floor glue, and it is whole to level surface with a roller flattening-out；
Second layer adhesive: at fiber layer surface spray paste stick, making double-layer glue stick and fibrolaminar total thickness is 3 ± 0.5mm,
Rear roller grinds flat surface, makes adhesive be uniformly distributed.
Concrete through surface reconditioning is taked waterproof measure, in an outdoor environment after more than maintenance 6h with polisher by surface
Process smooth, thus obtain the xoncrete structure of surface reconditioning.
The present invention well enriches existing reinforcement means, is innovated from the preparation and construction technology of material, the most excellent
Point is as follows:
1) consolidation effect is stable: the compatibility by modified epoxyn and concrete is relatively good, and mobility is strong,
Smearing through multilamellar, adhesive penetrates into inside concrete, and holes at concrete surface, and adhesive deeper enters into mixed
Solidifying soil is internal, further increases adhesive, fiber and the globality of concrete three；The large fluidity of adhesive avoids extremely
The problems such as angle difficult treatment, and chopped fiber is to there is the inside of adhesive, and structural strengthening is closely knit, superior in durability, eliminates
The probability of reinforcement material stripping damage, consolidation effect is stable；
2) material cost reduces: this technology be instead of the reinforcement material such as fiber cloth and steel plate by chopped fiber, and operational approach simplifies,
Construction and material cost greatly reduce；
3) simple and concrete the shock resistance of construction technology improves: technique process is easy, easily operates, only through boring,
Multilamellar is coated with daub and paving fiber, can be with mechanized construction；Fiber can be paved with concrete surface, and adhesive glue uniformly
Through repeatedly leveling stone roller with a roller, it is possible to sufficiently and fiber contacts, and penetrate into inside xoncrete structure, and the adhesive in hole and table
The globality of face adhesive makes the overall performance of adhesive and concrete improve further, and stability and strengthening quality can be protected
Card, shock resistance largely improves；
4) apparent effective: this reinforcement material is transparent material, the destruction of aesthetic effect apparent to original structure is negligible,
The structure suitability is constant；
By above-mentioned material preparation and the innovation of construction technique, novel xoncrete structure repairing and reinforcement work can be invented
Skill.Simple process, easily operates, and the shock resistance improving xoncrete structure is good, efficient, high-strength, high stability excellent
Point meets the requirement of the structural strengthening marketization, has preferable application prospect.
Detailed description of the invention
In examples of implementation, raw material composition is as follows:
C30 commerical ready-mixed concrete selected by concrete；For reaching good consolidation effect, adhesive glue and fiber is enable effectively to glue
Together, adhesive selects E-51 epoxy resin, pnenolic aldehyde amine hardener, acetone diluent, nanometer calcium silicate powder and polypropylene to knot
Nitrile chopped fiber.Wherein, E-51 epoxy resin, viscosity 2500mPa when 23 DEG C.s；Pnenolic aldehyde amine hardener, model T-5, Henan
Natural selection Industrial Co., Ltd., outward appearance brownish red transparency liquid, density 0.9～1.1g/cm3, viscosity 5000mPa.S, total amine number is
450+20KOH mg/g；The diameter of Orlon has selected 0.012mm, fibre length to select 12mm, fine
Volume volume is adhesive volume the 20% of dimension；
Concrete surface hole selects 10mm, 15mm, 20mm deeply, and hole diameter selects 5mm, 8mm, 10mm,
Hole pitch-row selects 50mm, 80mm, 100mm；The proportioning of structure glue is E-51: diluent: firming agent: nano-silicon
Acid calcium powder=1.00:0.15:0.30:0.40, the mechanical property of adhesive: tensile strength is 45MPa, tension elastic modelling quantity is
2555MPa, comprcssive strength is 77MPa, is 2.8MPa (concrete cohesional failure) with the adhesion strength of just drawing of concrete
Test employing drop hammer type shock test:
Test is divided into three groups: group 1 is 10mm deeply for hole；Group 2 is that hole is deeply for 15mm；Group 3 is that hole is deeply for 20mm；
Metal rounding cylinder mould, a size of Φ 150mm ± 1mm, high 35mm ± 0.5mm are selected in die trial；With reference to " common coagulation
Soil mechanics method for testing performance " (GB/T 50081-2002) make C30 concrete test block, concrete test block standard conditions
After lower maintenance 28d, surface polishing is removed and loosens granule and floating dust；By ground floor glue uniform application to the coagulation cleaned out
Soil surface, is uniformly paved with concrete surface simultaneously by fiber, and whole with cylinder roller flattening-out, and checks that fiber is evenly distributed,
Deng ground floor glue completely dry after, then epoxy resin is sprayed onto concrete surface, and makes surface of test piece smooth with cylinder roller stone roller；
Process of the test performs with reference to " epoxy resin mortar technical regulation " (DL/T 5193-2004).
The test result of embodiment is as shown in table 1～3.
1 group of 1 elastic modulus of concrete experimental test result of table
2 group of 2 elastic modulus of concrete experimental test result of table
3 group of 3 elastic modulus of concrete experimental test result of table
Experimental result can significantly be found out: after the reinforcing of the method, and the shock resistance of concrete significantly improves.
Illustrate that applying xoncrete structure basic unit recovery technique to improve elastic modulus of concrete intensity method is a kind of concrete simple, efficient
Structure repair reinforcement means, can promote the use of.
Claims (1)
1. an xoncrete structure basic unit recovery technique improves elastic modulus of concrete intensity method, it is characterised in that:
The index of quality of each component requires as follows:
Fiber: Orlon, fibre length at 12 ± 1mm, a diameter of 0.012 ± 0.005mm；Volume
For adhesive volume 20%；
Adhesive: utilizing pnenolic aldehyde amine hardener and nanometer calcium silicate powder, that modified epoxy prepares is gluing
Agent；
Epoxy resin: model E51；
Diluent: acetone；Addition content is the 15% of E51 mass；
Pnenolic aldehyde amine hardener: density is 0.9～1.1g/mL, viscosity is 5000mPa s, and total amine number is 470KOH
mg/g；Addition content is the 30% of E51 mass；
Nanometer calcium silicate powder: fineness 3000 mesh, addition content is the 40% of E51 mass；
Reinforcing construction process is as follows:
Concrete structural surface processes: is polished by concrete structural surface, is hung down by concrete structural surface with electric drill
Directly pierce deep 10mm～20mm, diameter 5mm～10mm, adjacent holes away from for 50～100mm multiple holes,
And remove loosening granule and floating dust；
Adhesive: first acetone is put into agitation and dilution in E51, then nanometer calcium silicate powder is put into,
Being finally putting into pnenolic aldehyde amine hardener, and agitated liquid is uniform no less than 2min to liquid, Adhesive completes；
Ground floor adhesive: first fill adhesive, and vibration compacting at concrete surface hole, then use hairbrush
Uniformly painted concrete surface, ground floor brushing adhesive stick 1 ± 0.3mm is thick；
Fibrous layer is laid: is uniformly paved with Orlon on the surface of ground floor adhesive, and is leveled with a roller on surface
Flattening-out is whole；
Second layer adhesive: at fiber layer surface spray paste stick, makes double-layer glue stick and the fibrolaminar total thickness be
3 ± 0.5mm, rear roller grinds flat surface, makes adhesive be uniformly distributed；
Concrete through surface reconditioning is taked waterproof measure, in an outdoor environment with beating after more than maintenance 6h
Surface is patted whole by grinding machine, thus obtains the xoncrete structure of surface reconditioning.
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| CN201410743320.6A CN104594652B (en) | 2014-12-07 | 2014-12-07 | A kind of xoncrete structure basic unit recovery technique improves elastic modulus of concrete intensity method |
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| CN201410743320.6A CN104594652B (en) | 2014-12-07 | 2014-12-07 | A kind of xoncrete structure basic unit recovery technique improves elastic modulus of concrete intensity method |
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| CN104594652A CN104594652A (en) | 2015-05-06 |
| CN104594652B true CN104594652B (en) | 2016-08-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154346A (en) * | 1996-12-29 | 1997-07-16 | 李文忠 | Cement for quick reparing concrete |
| CN101235673A (en) * | 2008-01-18 | 2008-08-06 | 河海大学 | Method for rehabilitating concrete surface injury using high-strength abrasion-proof basalt fibre mortar |
| CN101736911A (en) * | 2009-12-31 | 2010-06-16 | 王丹 | External protection or repair method for concrete |
| CN103570286A (en) * | 2013-08-14 | 2014-02-12 | 朱文云 | Concrete for rehabilitating historic building |
| JP2014136751A (en) * | 2013-01-17 | 2014-07-28 | Asahi Kasei Chemicals Corp | Composition and polymer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130156501A1 (en) * | 2011-12-16 | 2013-06-20 | William Scott HEMPHILL | Reinforced fiber mats for use in paved surfaces |
-
2014
- 2014-12-07 CN CN201410743320.6A patent/CN104594652B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154346A (en) * | 1996-12-29 | 1997-07-16 | 李文忠 | Cement for quick reparing concrete |
| CN101235673A (en) * | 2008-01-18 | 2008-08-06 | 河海大学 | Method for rehabilitating concrete surface injury using high-strength abrasion-proof basalt fibre mortar |
| CN101736911A (en) * | 2009-12-31 | 2010-06-16 | 王丹 | External protection or repair method for concrete |
| JP2014136751A (en) * | 2013-01-17 | 2014-07-28 | Asahi Kasei Chemicals Corp | Composition and polymer |
| CN103570286A (en) * | 2013-08-14 | 2014-02-12 | 朱文云 | Concrete for rehabilitating historic building |
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