CN105255159B - A kind of height for being used to solidify Roadbed subsidence reparation bonds damping type polyurethane repair material - Google Patents
A kind of height for being used to solidify Roadbed subsidence reparation bonds damping type polyurethane repair material Download PDFInfo
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- CN105255159B CN105255159B CN201510804409.3A CN201510804409A CN105255159B CN 105255159 B CN105255159 B CN 105255159B CN 201510804409 A CN201510804409 A CN 201510804409A CN 105255159 B CN105255159 B CN 105255159B
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Abstract
The present invention relates to a kind of damping type polyurethane repair material is bonded for high-speed railway or the height of heavy haul railway urethane cures Roadbed subsidence reparation.The material is formed by component A with B component material through mechanical mixture stirring, and the mass ratio of component A and B component is 1:0.9~1:1.5；Component A is the mixture that HDI trimer and polymethylene multi-phenenyl isocyanate form, and the mass ratio of the two is 3:7~6:4 ,-NCO content is 27% ~ 29%；B component is polyalcohol, catalyst, deaeration agent, deicer, age resistor, fire retardant and rubber grain composition, it is characterised in that polyalcohol is the high molecular weight polyether mixture that 6 degree of functionality mannitol polyoxypropylene polyols and 3 degrees of functionality, molecular weight are 12000.The polyurethane repair material prepared according to the present invention, cubical expansivity are 1% ~ 3%, 1h compression strength >=12MPa, and adhesion strength >=6MPa, damping factor is 0.25 ~ 0.40；Through 5,000,000 fatigue loads, accumulating residual deformation≤0.5%, this material can be used for urethane cures Roadbed subsidence reparation, it can also be used to railway ballast adhesive curing Roadbed subsidence reparation.
Description
Technical field
Subtract the present invention relates to a kind of for high-speed railway or the high bonding of heavy haul railway urethane cures Roadbed subsidence reparation
Vibration shape polyurethane repair material, available for solidification ballast bed structure aging hurt reparation, being also applied for high-speed railway has the tiny fragments of stone, coal, etc. --- nothing
The hurt of Zha Guidaoguoduqu railway ballast adhesive curing railway roadbed and sedimentation are repaired, and belong to microporous foam elastic polyurethane body technique neck
Domain.
Background technology
Ballast track has the advantages that low cost, construction is simple, elasticity are good and can repair, still, with China's economy
Fast development, high-speed railway and heavy haul railway are the Main ways of China railways development, with freight volume, rate of traffic flow and axle weight
Increase, the maintenance workload increase of Ballast track, the lance being further exacerbated by between railway transportation and track maintenance and repair
Shield；Non-fragment orbit has the advantages that globality is strong, stability is high, maintenance load is few, but the line that non-fragment orbit requirement is firm
Lower basis, and the maintenanceability of non-fragment orbit is poor, and construction costs is of a relatively high.Exist to solve Ballast track and non-fragment orbit
Deficiency, from 2010, China carried out in succession polyurethane foam solidification railway roadbed complete set technology research, the railway roadbed is with the tiny fragments of stone, coal, etc.
The favorable elasticity of railway roadbed and the stability of ballastless track bed, there is good damping property, and there is certain maintenanceability, be
A kind of novel track structure with applications well prospect.
Urethane cures railway roadbed is to be consolidated using dual-component polyurethane foamed material by stable bulk solid railway ballast has been reached
A kind of solid concrete roabed formed.It follows that solidification railway roadbed mainly by ing the bulk solid railway ballast of skeleton function and rise connect, stably
The polyurethane foamed material composition of effect, in commission solidification railway roadbed directly bear the work of the dynamic load and climatic environment of train
With, and polyurethane foam curing materials belong to high polymer material, with the extension of active time, material occurs a certain degree of
Natural aging, the mechanical property and deformation performance for showing as material reduce, and influence the use function of urethane cures railway roadbed；This
Outside, influenceed by infrastructure differential settlement, cause in commission track structure to produce certain differential settlement, influence line
The ride comfort on road, there is above two disease, be required to repair urethane cures railway roadbed, during maintenance first by sleeper with it is poly-
Urethane solidification railway roadbed separation, then the urethane cures railway roadbed of top layer aging is removed, in space of the sleeper with solidifying railway roadbed
A certain amount of railway ballast is backfilled, is then filled into railway ballast with the polyurethane repair material with high bond strength and high damping properties
In, sleeper and urethane cures railway roadbed are coupled for an entirety again, recover the favorable elasticity of urethane cures railway roadbed and steady
Qualitative, patching material mainly plays support, height adjustment, load, power transmission and buffer shock-absorbing in the structure, it is possible to increase
The vertically and horizontally resistance of railway roadbed, this requires that polyurethane repair material has good service behaviour, higher adhesive property and compression
Performance, the needs of cast-in-site maintenance construction in skylight point are disclosure satisfy that, because urethane cures railway roadbed has excellent vibration damping
Noise reduction, this requires that patching material has higher damping vibration attenuation function, meets the needs of vibration and noise reducing, but current polyurethane
Materials most is to be prepared in factory, and its performance is also difficult to meet the needs for repairing urethane cures railway roadbed, therefore, of the invention
Propose a kind of high bond strength damping type polyurethane repair material for being used to repair urethane cures railway roadbed.
The content of the invention
Goal of the invention：Develop fast, microdilatancy it is an object of the invention to provide a kind of good fluidity, mechanical strength, height glues
Tie performance, high damping properties and can be used for reparation polyurethane to consolidate with the polyurethane repair material of excellent durability energy, the material
Change the Aging Damage and Settlement diseases of railway roadbed, can be used for the Settlement diseases of railway ballast adhesive curing railway roadbed.
Technical scheme：To achieve these goals, the invention provides a kind of polyurethane repair material, the material is by A, B
Bi-component forms, and component A is isocyanates, is made up of the raw material of following masses fraction：By HDI trimer and the more benzene of polymethylene
Based isocyanate mixes, and the mass ratio of the two is 3:7~6:4 ,-NCO content is 27%~29%；B component is by following
The raw material composition of mass fraction：Polyalcohol accounts for 85%~88%, and catalyst accounts for the 0.03%~0.12% of polyalcohol, deaeration agent
The 0.6%~1.5% of polyalcohol is accounted for, deicer accounts for the 1%~5% of polyalcohol, and age resistor accounts for the 1%~2% of polyalcohol, fire-retardant
Agent accounts for the 8%~12% of polyalcohol, and rubber grain accounts for the 3%~8% of B component.The mass ratio of component A and B component is 1:0.9~
1:1.5。
Above-mentioned isocyanates is the mixture of HDI trimer and polymethylene multi-phenenyl isocyanate, 25 after mixing
Viscosity at DEG C is 200mPa.s~500mPa.s.
Polyalcohol in above-mentioned B component is 6 degree of functionality mannitol polyoxypropylene polyols and 3 degrees of functionality, molecular weight are
12000 glycerine polyoxypropylene polyol composition, the ratio of the two are 2:8~4:6, after mixing mean molecule quantity be 400~
8000。
Catalyst in above-mentioned B component is isooctyl acid bismuth and the mixture of zinc Isoocatanoate, and the ratio of the two is 3:7.
Deaeration agent in above-mentioned B component is hydrophobicity polysiloxane defoaming agent.
Deicer in above-mentioned B component is molecular sieve desiccant, oxazolidines deicer, one kind in calcium oxide.
Age resistor in above-mentioned B component is hindered amine light stabilizer and the mixture of antioxidant, and the ratio of the two is 3:
1。
Fire retardant in above-mentioned B component is triphosphite ester.
Rubber grain in above-mentioned B component is natural rubber particle, and grain diameter is 1mm~3mm.
A kind of above-mentioned polyurethane repair material has excellent adhesive property and damping capacity, disclosure satisfy that high-speed railway
Or the needs of heavy haul railway urethane cures railway roadbed Window time maintenance activity, its cubical expansivity are 1%~3%；1h resistance to compressions
Intensity >=12MPa, 1d compression strength >=30MPa, 1d tensile strength >=15MPa, elongation at break >=30%, adhesion strength >=
6MPa, damping factor are 0.25~0.40；When maximum crushing stress is 0.3MPa, through 5,000,000 fatigue loads, polyurethane repair
Buildup of material residual deformation≤0.5%.
Working mechanism：Current dual-component polyurethane material is difficult to meet in Window time that the aging of urethane cures railway roadbed is damaged
The needs that wound or sedimentation are repaired.Reaction speed is fast, adhesion strength is high, damping is good, anti-aging effect is good in order to realize and
The high effect of dimensional stability, part HDI trimer polyisocyanates is employed in component A of the present invention, and HDI trimer is fat
Race's isocyanates, it is possible to increase adhesion strength, anti ageing property and the endurance quality of patching material, while it is more to also use part
Polymethylene polyphenyl isocyanates, the isocyanate functionality are high, it is possible to increase the mechanical strength and dimensionally stable of patching material
Property；6 degree of functionality low molecule amount mannitol polyoxypropylene polyols are employed in B component and 3 degree of functionality high molecular weight polyethers are more
First alcohol compounded technology, wherein 6 degree of functionality low molecular weight polyols can improve the mechanical strength and dimensional stability of patching material,
3 degree of functionality polyphosphazene polymer ethoxylated polyhydric alcohols can improve the deformation performance and adhesion strength of patching material, rise in the molecular structure good
Good damping vibration attenuation function；Deaeration agent is used to eliminate the air pocket in mixed serum, improves the density and intensity of patching material；Remove
Aqua is used for moisture unnecessary in removing system, to control the cubical expansivity of patching material, and then improves the close of patching material
Degree and intensity；Catalyst is mainly catalytic polyol and the gel catalyst of isocyanates reaction, for controlling the expansion of volume
Rate, and the catalytic of two kinds of catalyst is different, and slurry reaction speed can be adjusted by compounding；Age resistor is used to carry
The UV resistance ageing properties and heat aging performance of high patching material, improve the durability of material；Rubber grain mainly plays damping and made
With for improving the vibration and noise reducing performance of patching material.
Beneficial effect：The high-adhesion energy and excellent damping performance and rubber grain of the invention for fully combining polyurethane material
High damping properties, there is provided one kind be used for high-speed railway or the railway roadbed Aging Damage reparation of heavy haul railway urethane cures and sedimentation
The height of damage repair bonds high-damping polyurethane patching material, is studied by lot of experiments, each group distribution ratio science of the material
Rationally, patching material has following excellent performance：
(1) chemical reaction is rapid, disclosure satisfy that the needs of operation in skylight point.
(2) adhesion strength is high, can form good bonding with urethane cures railway roadbed and sleeper.
(3) mechanical strength is high, deformability is strong, disclosure satisfy that bullet train or the needs of heavy haul train operation.
(4) damping is good, and good buffer shock-absorbing effect can be played under bullet train effect.
(5) dimensional stability is high, ageing-resistant performance is good, can ensure the long durability of polyurethane repair material.
Embodiment
Embodiment of the present invention is further illustrated with reference to embodiment.These embodiments are only limitted to illustrate this hair
It is bright, without limiting the scope of the present invention.
Embodiment 1
Specific embodiment 1 is as shown in table 1.
By concrete sample drill core and the sample that size is φ 50mm × 25mm is cut into, two sample centerings are placed, examination
Sample spacing is 20mm, with brown paper and wide adhesive tape that sample is sealed around, and injected hole is left on top, with electric mixer by A
Component is mixed through high-speed stirred with B component and is poured into cavity, is stripped after 1d, metal side is pasted on the outside of concrete sample
Head, the adhesive property of polyurethane repair material and concrete material, rate of extension 10mm/ are tested with electronic universal tester
min.Anti-fatigue performance experiment peak load is 0.3MPa, and minimum load is 0.03MPa, loading frequency 5HZ, uses slide measure
Measure the front and rear thickness of sample loading, accumulating residual deformation after calculating 5,000,000 times.Test result is shown in Table 2.
The specific embodiment 1 of table 1
Note：Mw represents the mean molecule quantity of compound in table.
The performance for the polyurethane repair material that table 2 produces according to specific embodiment 1
| Sequence number | Pilot project | Implementation result |
| 1 | Expansion rate (%) | 2.3 |
| 2 | 1h compression strength (MPa) | 15.0 |
| 3 | 1d compression strength (MPa) | 42.0 |
| 4 | 1d tensile strengths (MPa) | 22.0 |
| 5 | Elongation at break (%) | 46.0 |
| 6 | Adhesion strength (MPa) | 7.8 |
| 7 | Damping factor | 0.32 |
| 8 | Accumulating residual deformation (%) | 0.02 |
Embodiment 2
Specific embodiment 2 is as shown in table 3.
The specific embodiment 2 of table 3
Note：Mw represents the mean molecule quantity of compound in table.
The test method of specific embodiment 2 is identical with the test method of embodiment 1, and implementation result is shown in Table 4.
The performance for the polyurethane repair material that table 4 produces according to specific embodiment 2
| Sequence number | Pilot project | Implementation result |
| 1 | Expansion rate (%) | 2.0 |
| 2 | 1h compression strength (MPa) | 13.0 |
| 3 | 1d compression strength (MPa) | 38.0 |
| 4 | 1d tensile strengths (MPa) | 18.0 |
| 5 | Elongation at break (%) | 62.0 |
| 6 | Adhesion strength (MPa) | 6.9 |
| 7 | Damping factor | 0.29 |
| 8 | Accumulating residual deformation (%) | 0.05 |
Embodiment 3
Specific embodiment 3 is as shown in table 5.
The specific embodiment 3 of table 5
Note：Mw represents the mean molecule quantity of compound in table.
Test method is identical with the test method of embodiment 1, and implementation result is shown in Table 6.
The performance for the polyurethane repair material that table 6 produces according to specific embodiment 3
| Sequence number | Pilot project | Implementation result |
| 1 | Expansion rate (%) | 1.6 |
| 2 | 1h compression strength (MPa) | 14.0 |
| 3 | 1d compression strength (MPa) | 41.0 |
| 4 | 1d tensile strengths (MPa) | 20.0 |
| 5 | Elongation at break (%) | 65.0 |
| 6 | Adhesion strength (MPa) | 6.5 |
| 7 | Damping factor | 0.36 |
| 8 | Accumulating residual deformation (%) | 0.04 |
By above example as can be seen that by the ratio and dosage of preferred polyol, HDI trimer, matching are added
Suitable deaeration agent, age resistor, catalyst, rubber grain, fire retardant and deicer, can be obtained fast, viscous with reaction speed
Knotting strength height, good damping result, the polyurethane repair material that anti-aging effect is good and dimensional stability is high.Therefore, it is of the invention
In obtained by polyurethane repair material can preferably be applied to high-speed railway or heavy haul railway urethane cures railway roadbed aging
Damage and Settlement diseases reparation, can be used for the tiny fragments of stone, coal, etc. --- the railway ballast adhesive curing Roadbed subsidence reparation without tiny fragments of stone, coal, etc. transition region.
Claims (9)
1. a kind of height for high-speed railway or heavy haul railway urethane cures Roadbed subsidence reparation bonds vibration damping type polyurethane and repaiied
Mend material, it is characterised in that：The component A that is made up of isocyanates and by polyalcohol, catalyst, deaeration agent, deicer, anti-old
Agent, fire retardant, the B component of rubber grain composition, the mass ratio of the two are 1:0.9~1:1.5 ratio mixes through mechanical agitation
After be poured into backfill railway ballast, slurries quickly chemically react and produce micro-scale volume expansion, by sleeper, backfill railway ballast and poly-
Urethane solidification railway roadbed is bonded as an entirety.Wherein, the component A is HDI trimer and polymethylene multi-phenenyl isocyanate
Mixture, the viscosity at 25 DEG C of component A is 200mPa.s~500mPa.s；Polyalcohol is 6 degree of functionality sweet dews in the B component
Alcohol polyoxypropylene polyol and 3 degrees of functionality, the polyether polyol mixtures that weight average molecular weight is 12000, the ratio of the two are
2:8~4:6, mean molecule quantity is 400~8000 after mixing, and B component viscosity at 25 DEG C is 600mPa.s~1000mPa.s；
Rubber grain is natural rubber particle in the B component, and grain diameter is 1mm~3mm.
2. polyurethane repair material as claimed in claim 1, it is characterised in that isocyanates is HDI trimer and polymethylene
The mixture of more phenyl isocyanates, the mass ratio of the two are 3:7~6:4 ,-NCO content is 27%~29%.
3. polyurethane repair material as claimed in claim 1, it is characterised in that rubber grain is natural rubber particle, rubber
Grain dosage is the 3%~8% of B component.
4. polyurethane repair material as claimed in claim 1, it is characterised in that catalyst is isooctyl acid bismuth and zinc Isoocatanoate
Mixture, the ratio of the two are 4:6~7:3, catalyst amount is 0.03%~0.12% of polyalcohol in B component.
5. polyurethane repair material as claimed in claim 1, it is characterised in that deaeration agent is hydrophobicity polysiloxane defoaming agent,
Defoamer dosage is 0.6%~1.5% of polyalcohol in B component.
6. polyurethane repair material as claimed in claim 1, it is characterised in that deicer be molecular sieve desiccant, oxazolidines,
One kind in calcium oxide, deicer dosage are 1%~5% of polyalcohol in B component.
7. polyurethane repair material as claimed in claim 1, it is characterised in that age resistor is hindered amine light stabilizer and resisted
The mixture of oxygen agent, the ratio of the two are 3:1, aging inhibitor dosage is 1%~2% of polyalcohol in B component.
8. polyurethane repair material as claimed in claim 1, it is characterised in that fire retardant is triphosphite ester, amount of flame-retardant agent
For 8%~12% of polyalcohol in B component.
9. one kind is by polyurethane repair material according to any one of claims 1 to 8, it is characterised in that cubical expansivity is
1%~3%；1h compression strength >=12MPa, 1d compression strength >=30MPa, 1d tensile strength >=15MPa, elongation at break >=
30%, adhesion strength >=6MPa, damping factor is 0.25~0.40；When maximum crushing stress is 0.3MPa, through 5,000,000 fatigues
Load, polyurethane repair buildup of material residual deformation≤0.5%.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664008A (en) * | 2005-02-06 | 2005-09-07 | 西北工业大学 | Resin filling materials for high speed railway |
| CN103992633A (en) * | 2014-05-08 | 2014-08-20 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane caulking material for expansion joints of ballastless track of high speed railway |
| CN104448207A (en) * | 2014-12-25 | 2015-03-25 | 中国铁道科学研究院 | Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof |
| CN104479099A (en) * | 2014-11-18 | 2015-04-01 | 中国铁道科学研究院铁道建筑研究所 | Low-viscosity high-early-strength polyurethane repair material for high speed railway slab ballastless track filling layer open joint repair |
| CN104693413A (en) * | 2015-03-24 | 2015-06-10 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane patching material used for settlement repairing of ballastless track structure for high-speed railway |
| CN105001397A (en) * | 2015-05-21 | 2015-10-28 | 淄博润义金环保新材料科技有限公司 | Tunnel strengthening polyurethane material and preparation method thereof |
-
2015
- 2015-11-20 CN CN201510804409.3A patent/CN105255159B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664008A (en) * | 2005-02-06 | 2005-09-07 | 西北工业大学 | Resin filling materials for high speed railway |
| CN103992633A (en) * | 2014-05-08 | 2014-08-20 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane caulking material for expansion joints of ballastless track of high speed railway |
| CN104479099A (en) * | 2014-11-18 | 2015-04-01 | 中国铁道科学研究院铁道建筑研究所 | Low-viscosity high-early-strength polyurethane repair material for high speed railway slab ballastless track filling layer open joint repair |
| CN104448207A (en) * | 2014-12-25 | 2015-03-25 | 中国铁道科学研究院 | Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof |
| CN104693413A (en) * | 2015-03-24 | 2015-06-10 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane patching material used for settlement repairing of ballastless track structure for high-speed railway |
| CN105001397A (en) * | 2015-05-21 | 2015-10-28 | 淄博润义金环保新材料科技有限公司 | Tunnel strengthening polyurethane material and preparation method thereof |
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Effective date of registration: 20190417 Address after: No. 2, Da Liu Shu Road, Haidian District, Beijing Co-patentee after: CHINA ACADEMY OF RAILWAY SCIENCES Patentee after: CHINA ACADEMY OF RAILWAY SCIENCES RAILWAY ENGINEERING Research Institute Co-patentee after: CHINA RAILWAY Corp. Address before: No. 2, Da Liu Shu Road, Haidian District, Beijing Co-patentee before: China Academy of Railway Sciences Patentee before: CHINA ACADEMY OF RAILWAY SCIENCES RAILWAY ENGINEERING Research Institute |
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