CN104533104B - A kind of surface reconditioning thin layer improves the method for concrete impact-resistant hit intensity - Google Patents
A kind of surface reconditioning thin layer improves the method for concrete impact-resistant hit intensity Download PDFInfo
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- CN104533104B CN104533104B CN201410740980.9A CN201410740980A CN104533104B CN 104533104 B CN104533104 B CN 104533104B CN 201410740980 A CN201410740980 A CN 201410740980A CN 104533104 B CN104533104 B CN 104533104B
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Abstract
A kind of surface reconditioning thin layer improves the method for concrete impact-resistant hit intensity and belongs to Reinforcement Technology of Concrete Structure field.The present invention utilizes Orlon and modified epoxide resin adhesive, smears adhesive by multilamellar and lays the operation reparation concrete structural surfaces such as chopped fiber, to reach the effect of the impact strength of Concrete Structure structure.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 above the price of chopped fiber；
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 the structure suitability 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:
1. the method that application surface reconditioning thin layer improves concrete impact-resistant hit intensity, it is characterised in that:
The index of quality of each component requires as follows:
Fiber: Orlon, fibre length 6～25mm, a diameter of 0.010～0.025mm；Volume is adhesive
The 10%～30% 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 0.9～1.1g/cm3, viscosity 5000mPa.s, total amine number is 450+20 KOH mg/g；Mix
Dosage is the 30% of E51 mass；
Filler: fine sand, 0.16～1.00mm continuous grading, modulus of fineness is 1.6, and volume is the 25% of E51 mass；Nanometer
Calcium silicate powder, fineness 3000 mesh, addition content is the 15% of E51 mass；Rubber powder is the butyl that waste tire of automobile grinds
Rubber grain, fineness 50 mesh, wherein acrylonitrile mass content is 33%, and addition content is the 5% of E51 mass；
Reinforcing construction process is as follows:
Concrete structural surface processes: concrete structural surface polishing is removed loosening granule, and removes floating dust；
Adhesive: first acetone is put into agitation and dilution in E51, then nano-calcium carbonate, fine sand and rubber powder are 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: be that 1 ± 0.3mm is thick with the adhesive on hairbrush uniform painted concrete surface；
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,
Avoid the problems such as dead angle difficult treatment.Smearing through multilamellar, adhesive penetrates into inside concrete, it is possible to and concrete is originally
Body has well bonding, 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, fine sand, rubber powder and
The interpolation of the fillers such as nano-calcium carbonate also reduces the cost of adhesive, and operational approach simplifies, and construction and material cost are significantly
Reduction；
3) simple and concrete the shock resistance of construction technology improves: technique process is easy, easily operates, and is only coated with through multilamellar
Daub and paving fiber, can be with mechanized construction；Fiber can be paved with concrete surface uniformly, and adhesive glue is through too much
Secondary roller grinds, it is possible to penetrate into inside xoncrete structure, and can fully and fiber fusion, overall performance, stability and add stereoplasm
Amount ensure that, 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
Knot together, adhesive select E-51 epoxy resin, pnenolic aldehyde amine hardener, acetone diluent, nanometer calcium silicate powder, rubber powder,
Fine sand and Orlon.Wherein, E-51 epoxy resin, viscosity 2500mPa.s when 23 DEG C；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+20 KOH mg/g；The diameter of Orlon selected 0.010mm, 0.015mm and
0.025mm, fibre length selected 6mm, 15mm and 25mm, fiber volume volume is adhesive volume 10%,
20% and 30%；Fine sand, 0.16～1.00mm continuous grading, modulus of fineness is 1.6；Nanometer calcium silicate powder, fineness 3000
Mesh, calcium carbonate content 99%, density 2.7g/cm3；Rubber powder, the butyl rubber granule that waste tire of automobile grinds, fineness
50 mesh, acrylonitrile content 33%, density 1g/cm3；The proportioning of structure glue is E-51: diluent: firming agent: nanometer silicic acid
Calcium powder: rubber powder: fine sand=1.00:0.15:0.30:0.15:0.05:0.25, the mechanical property of adhesive: tensile strength is 41MPa,
Tension elastic modelling quantity is 2620MPa, and comprcssive strength is 75MPa, is 2.6MPa (concrete with the adhesion strength of just drawing of concrete
Cohesional failure).
Test employing drop hammer type shock test:
Test is divided into three groups: organizing 1 is 10% for fiber volume volume；Organizing 2 is 20% for fiber volume volume；Group 3 is fine
Dimension volume volume is 30%.
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, after ground floor glue is completely dry,
Epoxy resin is sprayed onto concrete surface again, and makes surface of test piece smooth with cylinder roller stone roller, maintenance under room temperature outdoor environment
After 6h, with polisher, surface of test piece is polished flat；Process of the test is with reference to " epoxy resin mortar technical regulation " (DL/T
5193-2004) perform.
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 the method applying surface reconditioning thin layer to improve concrete impact-resistant hit intensity is a kind of xoncrete structure reparation simple, efficient
Reinforcement means, can promote the use of.
Claims (1)
1. the method that surface reconditioning thin layer improves concrete impact-resistant hit intensity, it is characterised in that:
The index of quality of each component requires as follows:
Fiber: Orlon, fibre length 6～25mm, a diameter of 0.010～0.025mm；Volume
For adhesive volume 10%～30%；
Adhesive: utilize the adhesive that pnenolic aldehyde amine hardener and nanometer calcium silicate powder modified epoxy are prepared；
Epoxy resin: model E51；
Diluent: acetone；Addition content is the 15% of E51 mass；
Pnenolic aldehyde amine hardener: density 0.9～1.1g/cm3, viscosity 5000mPa.s, total amine number is 470mg KOH
/g；Addition content is the 30% of E51 mass；
Filler: fine sand, 0.16～1.00mm continuous grading, modulus of fineness is 1.6, and volume is E51 mass
25%；Nanometer calcium silicate powder, fineness 3000 mesh, addition content is the 15% of E51 mass；Rubber powder is waste and old
The butyl rubber granule that automobile tire grinds, fineness 50 mesh, wherein acrylonitrile mass content is 33%, admixture
Amount is the 5% of E51 mass；
Reinforcing construction process is as follows:
Concrete structural surface processes: concrete structural surface polishing is removed loosening granule, and removes floating dust；
Adhesive: first acetone is put into agitation and dilution in E51, then by nanometer calcium silicate powder, fine sand and
Rubber powder is put into, and is finally putting into pnenolic aldehyde amine hardener, and agitated liquid is uniform no less than 2min to liquid, glue
Stick has been prepared；
Ground floor adhesive: be that 1 ± 0.3mm is thick with the adhesive on hairbrush uniform painted concrete surface；
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, 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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| CN201410740980.9A CN104533104B (en) | 2014-12-07 | 2014-12-07 | A kind of surface reconditioning thin layer improves the method for concrete impact-resistant hit intensity |
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| CN104533104B true CN104533104B (en) | 2016-08-24 |
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| CN113882298A (en) * | 2021-10-20 | 2022-01-04 | 山西省交通科技研发有限公司 | Fiber composite material reinforced anti-corrosion bridge anti-collision wall and preparation method thereof |
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| JP3801726B2 (en) * | 1997-05-06 | 2006-07-26 | 三菱レイヨン株式会社 | Repair and reinforcement method for existing concrete structures |
| CN2436603Y (en) * | 1999-11-08 | 2001-06-27 | 邹友富 | Carbonaceous weftless fabric reinforcing structure |
| CN102409867A (en) * | 2011-09-14 | 2012-04-11 | 博睿思科技(大连)有限公司 | Carbon fiber composite material reinforcing process |
| CN102493673B (en) * | 2011-12-01 | 2014-01-08 | 杭州岩土工程有限公司 | Method for reinforcing epoxy coating used on building surfaces |
| CN102561412A (en) * | 2012-02-07 | 2012-07-11 | 山东大学 | Reinforcement method for fiber reinforced composite plastic and concrete |
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