CN105255159A - Cured track bed sinking repairing high-viscosity vibration attenuation polyurethane repairing material - Google Patents
Cured track bed sinking repairing high-viscosity vibration attenuation polyurethane repairing material Download PDFInfo
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- CN105255159A CN105255159A CN201510804409.3A CN201510804409A CN105255159A CN 105255159 A CN105255159 A CN 105255159A CN 201510804409 A CN201510804409 A CN 201510804409A CN 105255159 A CN105255159 A CN 105255159A
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Abstract
The invention relates to a high-viscosity vibration attenuation polyurethane repairing material for sinking repairing of a polyurethane cured track bed of a high speed railway or a heavy haul railway. The high-viscosity vibration attenuation polyurethane repairing material consists of a component A and a component B which are mixed and stirred together mechanically, wherein the mass ratio of the component A to the component B is (1:0.9)-(1:1.5); the component A is a mixture of an HDI tripolymer and polymethylene polyphenyl isocyanate ester; the mass ratio of the HDI tripolymer to polymethylene polyphenyl isocyanate ester is (3:7)-(6:4); the content of -NCO is 27-29%; and the component B consists of polyhydric alcohol, a catalyst, a defoaming agent, a moisture scavenger, an anti-aging agent, a flame retardant and rubber granules. The high-viscosity vibration attenuation polyurethane repairing material is characterized in that the polyhydric alcohol is a mixture which consists of 6-functionality-degree mannitol poly(propylene oxide polyol) and 3-functionality-degree high molecular weight polyether polyol with the molecular weight of 12000. According to the polyurethane repairing material provided by the invention, the volume expansion ratio is 1-3%, the compressive strength of 1 hour is greater than or equal to 12MPa, the adhesion strength is greater than or equal to 6MPa, the damping factor is 0.25-0.40, the accumulated residual deformation is less than or equal to 0.5% after 5 million times of fatigue loading, and the polyurethane repairing material can be applied to polyurethane cured track bed sinking repairing and railway ballast cured track bed sinking repairing as well.
Description
Technical field
The present invention relates to a kind of high bonding damping type polyurethane repair material repaired for high-speed railway or heavy haul railway urethane cures Roadbed subsidence, can be used for the aging hurt reparation of solidification ballast bed structure, also being applicable to high-speed railway and having the tiny fragments of stone, coal, etc.---the hurt of the ballast glue solidification railway roadbed of non-fragment orbit zone of transition and sedimentation reparation, belong to microporous foam technical field of polyurethane elastomer.
Background technology
Ballast track has that cost is low, construction is simple, good springiness and the advantage such as can to keep in repair, but, along with the fast development of China's economy, high-speed railway and heavy haul railway are the Main way of China railways development, along with the increase that freight volume, rate of traffic flow and axle are heavy, the maintenance workload of Ballast track increases, and exacerbates the contradiction between transportation by railroad and track maintenance and repair further; Non-fragment orbit has the advantages such as globality is strong, stability is high, maintenance load is few, but non-fragment orbit is basic under requiring firm line, and the serviceability of non-fragment orbit is poor, and construction costs is relatively high.For solving the deficiency of Ballast track and non-fragment orbit existence, from 2010, China has carried out the research of polyurethane foam solidification railway roadbed complete set technology in succession, the favorable elasticity of this railway roadbed with tiny fragments of stone, coal, etc. railway roadbed and the stability of ballastless track bed, there is good damping property, and having certain serviceability, is a kind of novel track structure with applications well prospect.
Urethane cures railway roadbed is a kind of solid concrete roabed adopting dual-component polyurethane foam materials to reach stable bulk solid railway ballast consolidation and formed.It can thus be appreciated that, solidification railway roadbed is connected primarily of the bulk solid railway ballast and rising playing skeleton function, the polyurethane foamed material of stabilization forms, in commission solidification railway roadbed directly bears the travelling load of train and the effect of climatope, and polyurethane foam solidify material belongs to macromolecular material, along with the prolongation of active time, material there will be weather aging to a certain degree, and the mechanical property and the deformation performance that show as material reduce, and affect the using function of urethane cures railway roadbed, in addition, by the impact of infrastructure non-uniform settling, in commission track structure is caused to produce certain non-uniform settling, affect the ride comfort of circuit, there are above-mentioned two kinds of diseases, all need to keep in repair urethane cures railway roadbed, first sleeper is separated with urethane cures railway roadbed during maintenance, again urethane cures railway roadbed aging for top layer is removed, a certain amount of railway ballast is backfilled in sleeper with the space of solidification railway roadbed, then be filled in railway ballast with the polyurethane repair material with high bond strength and high damping properties, sleeper is connected as a whole with urethane cures railway roadbed again, recover favorable elasticity and the stability of urethane cures railway roadbed, patching material mainly plays support in the structure, height control, load, the effect of power transmission and buffer shock-absorbing, the vertical lateral resistance of railway roadbed can be improved, this requires that polyurethane repair material has good serviceability, higher adhesive property and compression performance, the needs of cast-in-site maintenance construction in the point of skylight can be met, because urethane cures railway roadbed has excellent effect of vibration and noise reduction, this requires that patching material has higher damping vibration attenuation function, meet the needs of vibration and noise reducing, but polyurethane material majority is prepare in factory at present, and its performance is also difficult to meet the needs repairing urethane cures railway roadbed, for this reason, the present invention proposes a kind of high bond strength damping type polyurethane repair material for repairing urethane cures railway roadbed.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of good fluidity, mechanical strength develop fast, microdilatancy, high-adhesion energy, high damping properties and have excellent durability can polyurethane repair material, this material can be used for Aging Damage and the Settlement diseases of repairing urethane cures railway roadbed, also may be used for the Settlement diseases of ballast glue solidification railway roadbed.
Technical scheme: to achieve these goals, the invention provides a kind of polyurethane repair material, this material is made up of A, B two-pack, component A is isocyanic ester, be made up of the raw material of following masses mark: by mixing of HDI tripolymer and polymethylene multi-phenenyl isocyanate, the mass ratio of the two is 3:7 ~ 6:4 ,-NCO content is 27% ~ 29%; B component is made up of the starting material of following masses mark: polyvalent alcohol accounts for 85% ~ 88%, catalyzer accounts for 0.03% ~ 0.12% of polyvalent alcohol, deaerating agent accounts for 0.6% ~ 1.5% of polyvalent alcohol, water-removal agent accounts for 1% ~ 5% of polyvalent alcohol, anti-aging agent accounts for 1% ~ 2% of polyvalent alcohol, fire retardant accounts for 8% ~ 12% of polyvalent alcohol, and rubber grain accounts for 3% ~ 8% of B component.The mass ratio of component A and B component is 1:0.9 ~ 1:1.5.
Above-mentioned isocyanic ester is the mixture of HDI tripolymer and polymethylene multi-phenenyl isocyanate, and the viscosity after mixing at 25 DEG C is 200mPa.s ~ 500mPa.s.
Polyvalent alcohol in above-mentioned B component to be 6 functionality N.F,USP MANNITOL polyoxypropylene polyols and 3 functionality, molecular weight be 12000 glycerine polyoxypropylene polyol composition, the ratio of the two is 2:8 ~ 4:6, and after mixing, molecular-weight average is 400 ~ 8000.
Catalyzer in above-mentioned B component is the mixture of isocaprylic acid bismuth and isocaprylic acid zinc, and the ratio of the two is 3:7.
Deaerating agent in above-mentioned B component is hydrophobic nature polysiloxane defoamers.
Water-removal agent in above-mentioned B component is the one in molecular sieve desiccant, oxazolidine water-removal agent, calcium oxide.
Anti-aging agent in above-mentioned B component is the mixture of hindered amine light stabilizer and oxidation inhibitor, and the ratio of the two is 3:1.
Fire retardant in above-mentioned B component is the one in GW-540, N, N-bis aminomethyl dimethyl phosphate, N, N-diamino methylene diethyl phosphoric acid.
Rubber grain in above-mentioned B component is natural rubber particle, and grain diameter is 1mm ~ 3mm.
Above-mentioned a kind of polyurethane repair material has excellent adhesive property and damping capacity, and can meet the needs of high-speed railway or heavy haul railway urethane cures railway roadbed Window time remedial operation, its cubical expansivity is 1% ~ 3%; 1h ultimate compression strength >=12MPa, 1d ultimate compression strength >=30MPa, 1d tensile strength >=15MPa, elongation at break >=30%, cohesive strength >=6MPa, damping factor is 0.25 ~ 0.40; When maximum crushing stress is 0.3MPa, through 5,000,000 fatigue loads, polyurethane repair buildup of material residual set≤0.5%.
Working mechanism: current dual-component polyurethane material is difficult to meet the needs that in Window time, urethane cures railway roadbed Aging Damage or sedimentation are repaired.In order to the effect that realization response speed is fast, cohesive strength is high, damping is good, anti-aging is effective and dimensional stability is high, part HDI tripolymer polyisocyanates is have employed in component A of the present invention, HDI tripolymer is aliphatic isocyanates, the cohesive strength of patching material, anti ageing property and endurance quality can be improved, also use part polymethylene multi-phenenyl isocyanate simultaneously, this isocyanate functionality is high, can improve mechanical strength and the dimensional stability of patching material; Have employed 6 functionality lower molecular weight N.F,USP MANNITOL polyoxypropylene polyols and 3 functionality high molecular weight polyether compounded technologies in B component, wherein 6 functionality low molecular weight polyols can improve mechanical strength and the dimensional stability of patching material, 3 functionality polyphosphazene polymer ethoxylated polyhydric alcohols can improve deformation performance and the cohesive strength of patching material, play good damping vibration attenuation function in the molecular structure; Deaerating agent, for eliminating the air pocket in mixed serum, improves density and the intensity of patching material; Water-removal agent is used for moisture unnecessary in removing system, to control the cubical expansivity of patching material, and then improves density and the intensity of patching material; Catalyzer is mainly the gel catalyst of catalytic polyol and isocyanate reaction, and for controlling the rate of expansion of volume, and the catalytic of two kinds of catalyzer is different, can regulate slurry reaction speed by composite; Anti-aging agent, for improving UV resistance aging resistance and the heat aging performance of patching material, improves the weather resistance of material; Rubber grain mainly plays damping action, for improving the vibration and noise reducing performance of patching material.
Beneficial effect: the present invention is fully in conjunction with the high-adhesion energy of polyurethane material and the high damping properties of excellent damping performance and rubber grain, provide and a kind ofly to bond high-damping polyurethane patching material for the height that high-speed railway or heavy haul railway urethane cures railway roadbed Aging Damage are repaired and Settlement diseases is repaired, study through lot of experiments, each component proportion of this material is scientific and reasonable, and patching material has the performance of following excellence:
(1) chemical reaction is rapid, can meet the needs of operation in the point of skylight.
(2) cohesive strength is high, can form good bonding with urethane cures railway roadbed and sleeper.
(3) mechanical strength is high, deformability is strong, can meet the needs of bullet train or heavy haul train operation.
(4) damping is good, can play good buffer shock-absorbing effect under bullet train effect.
(5) dimensional stability is high, ageing-resistant performance good, can ensure the long durability of polyurethane repair material.
Embodiment
Embodiment of the present invention are further illustrated below in conjunction with embodiment.These embodiments are only limitted to explain and the present invention are described, and do not limit scope of the present invention.
embodiment 1
Specific embodiment 1 is as shown in table 1.
Concrete sample is bored core and cuts into and is of a size of
φthe sample of 50mm × 25mm, two sample centerings are placed, sample spacing is 20mm, with kraft paper and wide adhesive tape, sample surrounding is sealed, leave grouting hole on top, with electric mixer component A and B component mixed through high-speed stirring and be poured in cavity, the demoulding after 1d, outside concrete sample, paste metal side head, test the adhesive property of polyurethane repair material and concrete material with electronic universal tester, rate of extension is 10mm/min.Anti-fatigue performance test fully-factored load is 0.3MPa, and minimum load is 0.03MPa, and loading frequency is 5HZ, measures the thickness that sample loads front and back, accumulating residual deformation after calculating 5,000,000 times with vernier callipers.Test result is in table 2.
table 1 specific embodiment 1
Note: in table, Mw represents the molecular-weight average of compound.
the performance of the polyurethane repair material that table 2 is produced according to specific embodiment 1
embodiment 2
Specific embodiment 2 is as shown in table 3.
table 3 specific embodiment 2
Note: in table, Mw represents the molecular-weight average of compound.
Specific embodiment 2 test method is identical with the test method of embodiment 1, and implementation result is in table 4.
the performance of the polyurethane repair material that table 4 is produced according to specific embodiment 2
embodiment 3
Specific embodiment 3 is as shown in table 5.
table 5 specific embodiment 3
Note: in table, Mw represents the molecular-weight average of compound.
Test method is identical with the test method of embodiment 1, and implementation result is in table 6.
the performance of the polyurethane repair material that table 6 is produced according to specific embodiment 3
embodiment 4
Specific embodiment 4 is as shown in table 7.
table 7 specific embodiment 4
The test method of specific embodiment 4 is identical with the test method of embodiment 1, and implementation result is in table 8.
the performance of the polyurethane repair material that table 8 is produced according to specific embodiment 4
Can be found out by above embodiment, by ratio and the consumption of preferred polyol, add HDI tripolymer, mate suitable deaerating agent, anti-aging agent, catalyzer, rubber grain, fire retardant and water-removal agent, can obtain having that speed of response is fast, cohesive strength is high, good damping result, anti-aging is effective and dimensional stability is high polyurethane repair material.Therefore, the polyurethane repair material obtained in the present invention can be applicable to high-speed railway or heavy haul railway urethane cures railway roadbed Aging Damage and Settlement diseases reparation preferably, also may be used for there is the tiny fragments of stone, coal, etc.---without the ballast glue solidification Roadbed subsidence reparation of tiny fragments of stone, coal, etc. zone of transition.
Claims (9)
1. the high bonding damping type polyurethane repair material repaired for high-speed railway or heavy haul railway urethane cures Roadbed subsidence, it is characterized in that: the component A be made up of isocyanic ester and the B component be made up of polyvalent alcohol, catalyzer, deaerating agent, water-removal agent, anti-aging agent, fire retardant, rubber grain, the two mass ratio is that the ratio of 1:0.9 ~ 1:1.5 is poured in backfill railway ballast after mechanical stirring mixing, there is chemical reaction fast and produce micro-scale volume to expand in slurries, by as a whole to sleeper, backfill railway ballast and urethane cures railway roadbed bonding; Wherein, described component A is the mixture of HDI tripolymer and polymethylene multi-phenenyl isocyanate, and the viscosity at component A 25 DEG C is 200mPa.s ~ 500mPa.s; In described B component, polyvalent alcohol is 6 functionality N.F,USP MANNITOL polyoxypropylene polyols and 3 functionality, molecular weight is the polyether polyol mixtures of 12000, the ratio of the two is 2:8 ~ 4:6, after mixing, molecular-weight average is 400 ~ 8000, and B component viscosity at 25 DEG C is 600mPa.s ~ 1000mPa.s; In described B component, rubber grain is natural rubber particle, and grain diameter is 1mm ~ 3mm.
2. polyurethane repair material as claimed in claim 1, it is characterized in that isocyanic ester is the mixture of HDI tripolymer and polymethylene multi-phenenyl isocyanate, the mass ratio of the two is 3:7 ~ 6:4 ,-NCO content is 27% ~ 29%.
3. polyurethane repair material as claimed in claim 1, it is characterized in that rubber grain is natural rubber particle, rubber grain consumption is 3% ~ 8% of B component.
4. polyurethane repair material as claimed in claim 1, it is characterized in that catalyzer is the mixture of isocaprylic acid bismuth and isocaprylic acid zinc, the ratio of the two is 4:6 ~ 7:3, and catalyst levels is 0.03% ~ 0.12% of polyvalent alcohol in B component.
5. polyurethane repair material as claimed in claim 1, it is characterized in that deaerating agent is hydrophobic nature polysiloxane defoamers, defoamer consumption is 0.6% ~ 1.5% of polyvalent alcohol in B component.
6. polyurethane repair material as claimed in claim 1, it is characterized in that water-removal agent is the one in molecular sieve desiccant, oxazolidine, calcium oxide, water-removal agent consumption is 1% ~ 5% of polyvalent alcohol in B component.
7. polyurethane repair material as claimed in claim 1, it is characterized in that anti-aging agent is the mixture of hindered amine light stabilizer and oxidation inhibitor, the ratio of the two is 3:1, and aging inhibitor dosage is 1% ~ 2% of polyvalent alcohol in B component.
8. polyurethane repair material as claimed in claim 1, it is characterized in that fire retardant is GW-540, N, one in N-bis aminomethyl dimethyl phosphate, N, N-diamino methylene diethyl phosphoric acid, amount of flame-retardant agent is 8% ~ 12% of polyvalent alcohol in B component.
9. the polyurethane repair material according to any one of claim 1 ~ 8, is characterized in that, cubical expansivity is 1% ~ 3%; 1h ultimate compression strength >=12MPa, 1d ultimate compression strength >=30MPa, 1d tensile strength >=15MPa, elongation at break >=30%, cohesive strength >=6MPa, damping factor is 0.25 ~ 0.40; When maximum crushing stress is 0.3MPa, through 5,000,000 fatigue loads, polyurethane repair buildup of material residual set≤0.5%.
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| CN106758552A (en) * | 2016-12-21 | 2017-05-31 | 中国铁道科学研究院铁道建筑研究所 | It is a kind of to have ballast bed structure with surface glued layer |
| CN109627420A (en) * | 2018-12-28 | 2019-04-16 | 江苏中路工程技术研究院有限公司 | Organic injecting paste material of a kind of water-resistant type for repairing cracks in semi-rigid base course and preparation method thereof |
| CN111217978A (en) * | 2020-03-26 | 2020-06-02 | 中煤科工集团重庆研究院有限公司 | Method for reducing dosage of organic grouting reinforcement material polymeric MDI and product thereof |
| CN111675801A (en) * | 2019-11-14 | 2020-09-18 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Polyurethane cement composite repairing material |
| CN112980177A (en) * | 2021-03-01 | 2021-06-18 | 同济大学 | Waterproof vibration isolation microporous elastomer material for high-speed rail roadbed and structure thereof |
| CN113754345A (en) * | 2021-09-22 | 2021-12-07 | 山东硕果新材料科技有限公司 | High-damping resin-based mineral composite material and preparation method and application thereof |
| CN116285651A (en) * | 2023-03-27 | 2023-06-23 | 山东三新新材料科技有限公司 | Wear-resistant rubber repairing agent and preparation method and application thereof |
| CN117708470A (en) * | 2024-02-06 | 2024-03-15 | 西南交通大学 | Method for converting damping vibration function of vibration load of railway vehicle |
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| CN105926381A (en) * | 2016-04-22 | 2016-09-07 | 北京瑞威世纪岩土工程有限公司 | Method for changing ballast track bed of tunnel to ballastless track under condition of uninterrupted train working |
| CN106758552A (en) * | 2016-12-21 | 2017-05-31 | 中国铁道科学研究院铁道建筑研究所 | It is a kind of to have ballast bed structure with surface glued layer |
| CN109627420A (en) * | 2018-12-28 | 2019-04-16 | 江苏中路工程技术研究院有限公司 | Organic injecting paste material of a kind of water-resistant type for repairing cracks in semi-rigid base course and preparation method thereof |
| CN111675801A (en) * | 2019-11-14 | 2020-09-18 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Polyurethane cement composite repairing material |
| CN111217978A (en) * | 2020-03-26 | 2020-06-02 | 中煤科工集团重庆研究院有限公司 | Method for reducing dosage of organic grouting reinforcement material polymeric MDI and product thereof |
| CN112980177A (en) * | 2021-03-01 | 2021-06-18 | 同济大学 | Waterproof vibration isolation microporous elastomer material for high-speed rail roadbed and structure thereof |
| CN113754345A (en) * | 2021-09-22 | 2021-12-07 | 山东硕果新材料科技有限公司 | High-damping resin-based mineral composite material and preparation method and application thereof |
| CN116285651A (en) * | 2023-03-27 | 2023-06-23 | 山东三新新材料科技有限公司 | Wear-resistant rubber repairing agent and preparation method and application thereof |
| CN117708470A (en) * | 2024-02-06 | 2024-03-15 | 西南交通大学 | Method for converting damping vibration function of vibration load of railway vehicle |
| CN117708470B (en) * | 2024-02-06 | 2024-04-30 | 西南交通大学 | Method for converting damping vibration function of vibration load of railway vehicle |
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