CN104479099B - Low-viscosity high-early-strength polyurethane repair material for high speed railway slab ballastless track filling layer open joint repair - Google Patents
Low-viscosity high-early-strength polyurethane repair material for high speed railway slab ballastless track filling layer open joint repair Download PDFInfo
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Abstract
The invention discloses a low-viscosity high-early-strength polyurethane repair material for high speed railway slab ballastless track filling layer open joint repair. The repair material consists of two parts, namely a part A and a part B, wherein the part A consists of the following raw materials in parts by mass: 100 parts of isocyanate and prepolymers thereof; the part B consists of the following raw materials in parts by mass: 60-80 parts of reactive hydrogen oligomer, 40-70 parts of a plasticizer, 0.5-2 parts of a defoaming agent and 0.1-1 part of an anti-aging agent; and the volume ratio of the part A to the part B is 1:1. The polyurethane open joint repair material has the advantages of low viscosity, high curing speed, high mechanical strength, high adhesive strength, high toughness and excellent durability, can meet the requirements on rapid construction in skylight time and instant traffic service after repair and can be used for rapid maintenance of the operating high speed railway slab ballastless track structure.
Description
Technical field
The invention belongs to high-speed railway work business maintenance field, and in particular to a kind of high-speed railway plate type ballastless track fills
Packing course gap is repaired with the high early strong polyurethane repair material of low viscosity.
Background technology
Plate-type ballastless track has the features such as orbital forcing is high, rigidity uniformity is good, stability is strong because of it, becomes China
The primary trace structural shape that 300 kilometers of high-speed railways of speed per hour are adopted.China is Beijing-Shanghai, Beijing-to-Shijiazhuang is military, Beijing-Tianjin, Tianjin Qin, Harbin-to-Dalian, Shanghai
Rather, the high-speed railway such as Shanghai-Hangzhou, Ningbo-Hangzhou, Hangzhou-Zhejiang, conjunction freshwater mussel adopts platy ballastless track structure.Platy ballastless track structure mainly by
Precast track plate, filling bed, concrete bed or hydraulicity supporting course etc. are constituted, rail in CRTS I-type plate-type ballastless track structures
Guidance tape adopts cellular construction, and CRTS II plate-type non-fragment orbit middle orbits plate is coupled structure using vertical.Positioned at track plates and base
Between the major function of filling bed be filling, support, load, power transmission and the appropriate malleable of offer.CRTS I-type plate-types are without the tiny fragments of stone, coal, etc.
The cement emulsified asphalt mortar that the filling bed of track and CRTS II plate-type non-fragment orbits is adopted, CRTS type III plate-type ballastless
Track structure and roadbed section track switch platy ballastless track structure filling bed use self-compacting concrete.
Filling bed gap is one of main trauma form of platy ballastless track structure, and gap refers to the filling for irrigating hardening
There is crack between layer and track plates or bedplate.Jing to opening the Field Research of plate-type ballastless track line filling bed gap situation
It was found that, the mortar of track plates vertex angle part point is easiest to gap occur, and gap width is not waited and with environment temperature from 0.5mm to 5mm
The change of degree and change therewith.On the one hand it is that the rainwater on track plates can be along track plates periphery stream after filling bed produces gap
Enter gap gap, so as to form hydrops layer between filling bed and track plates or bedplate；On the other hand it is gap state lower railway
The vertical acceleration of plate and displacement increase, so as to increase impact load of the track plates to slurry placement layer when bullet train runs
Effect.Under the alternate cycles effect of repeated stock load, flowing pressure and temperature change when bullet train runs, filling bed
Interior gap constantly produces, extends and extends, and finally connects into fracture network, causes filling bed fragmentation occur.Accordingly, it would be desirable to make
High, the low easy filling of viscosity with bonding adhesion strength, the high-performance patching material that mechanical strength is taken into account with toughness is to filling bed gap
Repaired.Meanwhile, in order to realize that the quick reparation of ballastless track structure is completed in Window time, material should also possess quickly
The characteristics of solidification, early strong height.
Inorganic patching material viscosity is big, it is impossible to fill tiny gap, and the adhesion strength of inorganic material is relatively low, it is impossible to full
The technical requirements that sufficient filling bed gap is repaired.At present high-performance patching material is based on macromolecular material, mainly including asphalt mixtures modified by epoxy resin
Lipid, crylic acid resin and polyurethaness.Epoxy resin viscosity is high, rigidity is big, although solvent can be added to reduce viscosity, but meeting
Have a strong impact on the gelation rate of material, it is impossible to meet fast setting, high early strong requirement；Acrylic resin poor toughness, long-term
The lower easily cracking of DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES lotus effect is even broken, and it has penetrating odor and corrosivity, and the feature of environmental protection is poor；Poly- ammonia
Ester material has special micro phase separation structure, and with good pliability while can keeping certain mechanical strength, having can
The repairing of ballastless track of high-speed railway filling bed gap can be used for.But at present conventional polyurethane repair materials application is in high-speed railway
Non-fragment orbit filling bed gap repairing aspect, still suffers from following problem：
1. early strength is low：Although existing polyurethane repair material can accelerate response speed by adjusting catalyst, early
The lifting of phase state of cure is limited, and early stage mechanical strength is low, it is impossible to meet the needs being open to traffic immediately after repairing.
2. viscosity is high：The viscosity of existing polyurethane repair material is higher, typically in more than 500mPas, at short notice
Gap cannot be filled full by (≤20min), meanwhile, the viscosity of material increases with the time and increases, and mobility is greatly reduced, from
Seam is internal to occur more hole region, has a strong impact on repairing quality.
3. pliability is poor：Existing polyurethane repair material is to embody based on mechanical strength, and pliability is relatively low, when long-time is received
During to DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES lotus and Lateral Force, brittle fracture is susceptible to.
4. environmental suitability is poor：In lower temperature (5～15 DEG C), the response speed of polyurethane repair material declines, nothing
Method meets Rapid-Repair needs；When air humidity is big or gap inside is moist, polyurethane repair material easily foams, and wet bonding
Low intensity, repair efficiency declines obvious.
The content of the invention
Goal of the invention：The invention aims to solve the deficiencies in the prior art, there is provided a kind of high-speed railway is board-like
Non-fragment orbit filling bed gap is repaired with the high early strong polyurethane repair material of low viscosity.
Technical scheme：In order to realize object above, the invention provides a kind of high-speed railway plate type ballastless track filling bed
Gap is repaired and uses the high early strong polyurethane repair material of low viscosity, the material to be made up of A, B two parts, and part A is by following masses part
Several raw material compositions：100 parts of isocyanates and its prepolymer, the isocyanates are in PAPI, Carbodiimide-Modified MDI
One or two, prepolymer of the isocyanate prepolymer for isocyanates and the NCO content of dihydroxylic alcohols preparation 22%～28%,
Wherein isocyanates are one or two in IPDI, XDI, and dihydroxylic alcohols are end hydroxy butadiene of the molecular weight 400～800
Resin, EO contents are less than one or two in 8% polyethylene glycol oxide-propylene oxide polyol, plasticizer 20～50
Part；Part B is made up of the raw material of following masses number：60～80 parts of active hydrogen oligomer, the active hydrogen oligomer is low viscous
One or more in degree epoxy resin, alkyd resin, oil chemistry polyhydric alcohol, 40～70 parts of plasticizer, defoamer 0.5～2
Part, 0.1～1 part of age resistor；The two-part volume ratio of A, B is 1: 1.
Above-mentioned plasticizer is one or more in di-n-octyl sebacate, tributyl phosphate, phosphoric acid Diisooctyl；Froth breaking
Agent is silicone defoamer；Age resistor is one or more in light stabilizer, antioxidant and hydrolysis stabilizer.
Above-mentioned low viscosity early-strength mortar gap patching material performance meets viscosity≤50mPas, and gel time≤
30min, 2h tensile strength >=10MPa, 24h tensile strength >=15MPa, 7d tensile strengths >=20MPa, 2h compressive strengths >=
10MPa, 24h compressive strength >=20MPa, 7d compressive strength >=30MPa, 7d elongation at break >=20%, 7d shrinkage factor≤2%,
7d adhesion strengths >=5MPa, 7d green bonds >=3MPa, heat ageing process, alkali process and ultraviolet ageing process after-drawing intensity
With the requirement of rate of change≤10% of compressive strength, while the material does not foam when using in humid conditions.
A kind of above-mentioned polyurethane caulking material, its using method is：A, B component described in claim 1 are loaded into volume
In than the double-component slip casting machine for 1: 1, direct slip casting.
Working mechanism：In order to reduce component A viscosity, polyurethane repair material monomeric aromatic isocyanate being selected more, but
It is so to drop the compliance and resistance to ag(e)ing that largely reduce material.Therefore, the excellent low viscosity of ageing-resistant performance is selected
The prepolymer that aliphatic isocyanates are prepared with the dihydroxylic alcohols of linear low molecular weight is used in mixed way with monomeric aromatic isocyanate,
Both ensure that material had low viscosity, its compliance and ageing-resistant performance had been increased again.End hydroxy butadiene resin can be obvious
Mechanical property, adhesive property and the ageing-resistant performance of material are improved, polyethylene glycol oxide-oxygen of the EO contents less than 8% is suitably added
Change propylene polyol, material cost can be reduced in the case where material combination property base keeps this constant.B component is selected
Low viscosity epoxy resin, alkyd resin, oil chemistry polyhydric alcohol substitute conventional polyether polyhydric alcohol as reactive component, it is possible to decrease material
Expect viscosity, improve mechanical strength and compliance, hence it is evident that improve the adhesive property and resistance to ag(e)ing of material, realize high early strong wanting
Ask.Chain extension-crosslinking agent is not used, it is to avoid easily water suction causes foaming materials and amine small molecule response speed to alcohol micromolecular
The excessive problem of too fast, material stiffness.Meanwhile, above-mentioned active hydrogen oligomer reactivity is high, without the need for catalyst, you can realize fast
Speed solidification, and the reaction of isocyanates and water is significantly inhibited, can use in the larger environment of humidity or damping interface.Zero catalysis
Agent consumption, the environmental-protecting performance of polyurethane gap patching material is greatly improved.
Beneficial effect：A kind of ballastless track of high-speed railway mortar gap that the present invention is provided is repaired high early strong poly- with low viscosity
Urethane patching material, through lot of experiments research, each component proportioning of the component is scientific and reasonable, and said composition has following excellent
Performance：
(1) it is convenient to construct：The patching material uses the double-component slip casting machine slip casting that volume ratio is 1: 1.
(2) concrete castability is excellent：Area can be filled in 20min and be about 16m2, a width of 0.5mm～5mm gap.
(3) early stage mechanical strength is high：Gel time≤30min, 2h tensile strengths and compressive strength are in more than 10MPa a.
(4) pliability is good：Under long-term train fatigue load and Lateral Force, there is no brittle break.
(5) ageing-resistant performance is good：Heat-proof aging, alkaline-resisting and anti-ultraviolet ageing performance are excellent, thermally treated, alkali process and purple
It is outer it is aging after, rate of change≤10% of tensile strength and elongation at break.
(6) environmental suitability is strong：Can use when air humidity is big or gap inside is moist, material does not foam, wet bonding
Intensity is high.
Specific embodiment
Below specific embodiment is illustrated with embodiment, these embodiments are only limitted to illustrate the present invention, and do not limit
The scope of the present invention.
Polyurethane repair material preparation process is as follows：
Component A preparation technology：
(1) dihydroxylic alcohols are added into reactor, vacuum (vacuum≤- 0.9MPa) dehydration under the conditions of (120 ± 5) DEG C
2h, tests its moisture content, such as moisture content≤0.05%, then mixeding liquid temperature is near less than 70 DEG C, as being unsatisfactory for, continues to take off
Water, till requirement is met.When mixeding liquid temperature is near less than 70 DEG C, aliphatic isocyanates are added, and by its temperature
It is adjusted to (90 ± 5) DEG C, after reaction 90min prepolymer isocyanate content is tested, such as meet design load ± 0.2%, then will
Prepolymer is cooled to less than 50 DEG C, as being unsatisfactory for, continues reaction, till requirement is met.
(2) when prepolymer temperature is near less than 50 DEG C, plasticizer vacuum (vacuum≤- 0.9MPa) stirring deaeration is added
After 90min, discharge sealing preserve.
B component preparation technology：
(1) active hydrogen oligomer is added into reactor, under the conditions of (120 ± 5) DEG C vacuum (vacuum≤-
0.9MPa) be dehydrated 2h, test its moisture content, such as moisture content≤0.05%, then it is mixed liquor material temperature degree is near less than 50 DEG C, if not
To meet then continue and be dehydrated, till requirement is met.
(2) when temperature is near less than 50 DEG C, after adding the mixing such as plasticizer, defoamer, age resistor, vacuum (vacuum
≤ -0.9MPa) stirring deaeration 90min after, discharge sealing preserve.
Embodiment 1
The composition of polyurethane gap patching material：
Component A is made up of the raw material of following parts by weight：The isocyanides of 10 parts of IPDI and the 20 parts of preparations of polyurethane repair material
Acid esters group content is 22% prepolymer, 70 parts of PAPI, 20 parts of di-n-octyl sebacate；
Part B is made up of the raw material of following parts by weight：10 parts of low viscosity epoxy resin, 40 parts of alkyd resin, oils and fatss
Learn 10 parts of polyhydric alcohol, 20 parts of tributyl phosphate, 20 parts of phosphoric acid Diisooctyl, 0.5 part of defoamer BYK-066, light stabilizer 0.02
Part, 0.03 part of antioxidant, 0.05 part of hydrolysis stabilizer；
The two-part volume ratio of A, B is 1: 1.
Embodiment 2
The composition of polyurethane gap patching material：
Component A is made up of the raw material of following parts by weight：15 parts of XDI and 10 parts of end hydroxy butadiene resin and polyoxy
Change the prepolymer that 20 parts of isocyanate contents for preparing of ethylene oxide-propylene oxide polyol are 28%, carbodiimides
Modified MDI55 parts, 25 parts of tributyl phosphate, 25 parts of di-n-octyl sebacate；
Part B is made up of the raw material of following parts by weight：15 parts of low viscosity epoxy resin, 45 parts of alkyd resin, oils and fatss
20 parts of polyhydric alcohol, 30 parts of tributyl phosphate, 40 parts of phosphoric acid Diisooctyl, 2 parts of defoamer BYK-070,0.3 part of light stabilizer,
0.5 part of antioxidant, 0.2 part of hydrolysis stabilizer.
The two-part volume ratio of A, B is 1: 1.
Embodiment 3
The composition of polyurethane gap patching material：
Component A is made up of the raw material of following parts by weight：5 parts of XDI and polyethylene glycol oxide-propylene oxide polyol
10 parts preparation isocyanate content be 25% prepolymer, 30 parts of Carbodiimide-Modified MDI, 55 parts of PAPI, the last of the ten Heavenly stems
70 parts of adipate；
Part B is made up of the raw material of following parts by weight：5 parts of low viscosity epoxy resin, 35 parts of alkyd resin, oil chemistry
30 parts of polyhydric alcohol, 20 parts of tributyl phosphate, 35 parts of phosphoric acid Diisooctyl, 1.25 parts of defoamer BYK-088, light stabilizer 0.3
Part, 0.15 part of antioxidant, 0.1 part of hydrolysis stabilizer.
The two-part volume ratio of A, B is 1: 1.
Embodiment 4
The composition of polyurethane gap patching material：
Component A is made up of the raw material of following parts by weight：10 parts of IPDI and 15 parts of end hydroxy butadiene resin and polyoxy
Change the prepolymer that 25 parts of isocyanate contents for preparing of ethylene oxide-propylene oxide polyol are 23%, carbodiimides
Modified MDI50 parts, 35 parts of di-n-octyl sebacate, 30 parts of phosphoric acid Diisooctyl；
Part B is made up of the raw material of following parts by weight：5 parts of low viscosity epoxy resin, 30 parts of alkyd resin, oil chemistry
30 parts of polyhydric alcohol, 10 parts of tributyl phosphate, 35 parts of phosphoric acid Diisooctyl, 1.6 parts of defoamer BYK-066, light stabilizer 0.15
Part, 0.1 part of antioxidant, 0.05 part of hydrolysis stabilizer.
The two-part volume ratio of A, B is 1: 1.
Embodiment 5
The composition of polyurethane gap patching material：
Component A is made up of the raw material of following parts by weight：5 parts of XDI and 5 parts of end hydroxy butadiene resin and polyoxygenated
The isocyanate contents of 10 parts of ethylene oxide-propylene oxide polyol preparation are 27% prepolymer, 80 parts of PAPI, the last of the ten Heavenly stems
30 parts of adipate, 32 parts of phosphoric acid Diisooctyl；
Part B is made up of the raw material of following parts by weight：10 parts of low viscosity epoxy resin, 40 parts of alkyd resin, oils and fatss
25 parts of polyhydric alcohol, 65 parts of phosphoric acid Diisooctyl, 0.2 part of defoamer BYK-066,0.6 part of defoamer BYK-088, light is stable
0.4 part of agent, 0.2 part of antioxidant, 0.2 part of hydrolysis stabilizer.
The two-part volume ratio of A, B is 1: 1.
Embodiment 6
The composition of polyurethane gap patching material：
Component A is made up of the raw material of following parts by weight：5 parts of IPDI and 10 parts of end hydroxy butadiene resin and polyoxy
The isocyanate content for changing the 10 parts of preparations of ethylene oxide-propylene oxide polyol is 24% prepolymer, 5 parts of XDI and end
Isocyanate content prepared by 5 parts of hydroxyl polybutadiene and polyethylene glycol oxide -10 parts of propylene oxide polyol
For 26% prepolymer, 20 parts of PAPI, 15 parts of Carbodiimide-Modified MDI, 77 parts of di-n-octyl sebacate；
Part B is made up of the raw material of following parts by weight：13 parts of low viscosity epoxy resin, 47 parts of alkyd resin, oils and fatss
17 parts of polyhydric alcohol, 50 parts of phosphoric acid Diisooctyl, 1.5 parts of defoamer BYK-066,0.15 part of light stabilizers, 0.25 part of antioxidant,
0.2 part of hydrolysis stabilizer.
The two-part volume ratio of A, B is 1: 1.
Dual-component polyurethane gap patching material result of the test is as shown in table 1 below in example 1～6, and wherein viscosity is according to GB/
T 2794 is tested；Gel time is tested according to GB/T 7193；Tensile strength, elongation at break are tested according to GB/T 2567；It is anti-
Compressive Strength, adhesion strength are tested according to JC/T 1041；Shrinkage factor is by measurement liquidus density (GB/T 13354) and molding hardening
The density (GB/T 1033.1) of thing, calculates；Heat ageing process, alkali process and ultraviolet ageing processing method are according to GB/T
16777 perform：
The embodiment material property of table 1
Claims (5)
1. a kind of high-speed railway plate type ballastless track filling bed gap is repaired and uses the high early strong polyurethane repair material of low viscosity, and it is special
Levy and be：The material is made up of A, B two parts, and part A is made up of the raw material of following masses number：Isocyanates and its prepolymer
100 parts, the isocyanates are one or two in PAPI, Carbodiimide-Modified MDI, and isocyanate prepolymer is isocyanide
Prepolymer of the NCO content that acid esters is prepared with dihydroxylic alcohols 22%～28%, wherein isocyanates are the one kind in IPDI, XDI
Or two kinds, dihydroxylic alcohols be molecular weight 400～800 end hydroxy butadiene resin, EO contents less than 8% polyoxyethylene
One or two in alkene-propylene oxide polyol, 20～50 parts of plasticizer；Part B by following masses number raw material
Composition：60～80 parts of active hydrogen oligomer, the active hydrogen oligomer is low viscosity epoxy resin, alkyd resin, oil chemistry
One or more in polyhydric alcohol, 40～70 parts of plasticizer, 0.5～2 part of defoamer, 0.1～1 part of age resistor；A, B are two-part
Volume ratio is 1: 1.
2. the high early strong polyurethane repair material of a kind of low viscosity according to claim 1, it is characterised in that：The plasticizer
For one or more in di-n-octyl sebacate, tributyl phosphate, phosphoric acid Diisooctyl.
3. a kind of high early strong polyurethane repair material of low viscosity according to claim 1, it is characterised in that the defoamer
For silicone defoamer.
4. the high early strong polyurethane repair material of a kind of low viscosity according to claim 1, it is characterised in that：The age resistor
For one or more in light stabilizer, antioxidant and hydrolysis stabilizer.
5. the high early strong polyurethane repair material of low viscosity according to any one in claim 1-4, it is characterised in that：Institute
State the high early strong polyurethane repair material property of low viscosity and meet viscosity≤50mPas, gel time≤30min, 2h tensile strengths
>=10MPa, 24h tensile strength >=15MPa, 7d tensile strength >=20MPa, 2h compressive strengths >=10MPa, 24h compressive strengths >=
20MPa, 7d compressive strength >=30MPa, 7d elongation at break >=20%, 7d shrinkage factor≤2%, 7d adhesion strengths >=5MPa, 7d
Green bond >=3MPa, heat ageing process, alkali process and ultraviolet ageing process the rate of change of after-drawing intensity and compressive strength
≤ 10% requirement, while the material does not foam when using in humid conditions.
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| CN201410654891.2A CN104479099B (en) | 2014-11-18 | 2014-11-18 | Low-viscosity high-early-strength polyurethane repair material for high speed railway slab ballastless track filling layer open joint repair |
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| CN201410654891.2A CN104479099B (en) | 2014-11-18 | 2014-11-18 | Low-viscosity high-early-strength polyurethane repair material for high speed railway slab ballastless track filling layer open joint repair |
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| CN104479099A CN104479099A (en) | 2015-04-01 |
| CN104479099B true CN104479099B (en) | 2017-05-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105255159B (en) * | 2015-11-20 | 2018-01-12 | 中国铁道科学研究院铁道建筑研究所 | A kind of height for being used to solidify Roadbed subsidence reparation bonds damping type polyurethane repair material |
| CN105484110B (en) * | 2015-11-24 | 2020-06-19 | 北京瑞威铁科高铁工程有限公司 | Method for treating slurry leakage of gap between base plate of CRTSI type plate ballastless track of high-speed railway and surface layer of roadbed |
| CN106632984A (en) * | 2016-12-21 | 2017-05-10 | 中国铁道科学研究院铁道建筑研究所 | High-speed railway ballast track ballast bed surface cementing material |
| CN108863162A (en) * | 2018-06-01 | 2018-11-23 | 苏州睿烁环境科技有限公司 | A kind of preparation method and application of the brickwork joint healant for building ground |
| CN109942779B (en) * | 2019-04-02 | 2021-10-22 | 中建材中岩科技有限公司 | High-speed rail ballastless track open joint repairing slurry and preparation method thereof |
| CN111592293A (en) * | 2019-06-20 | 2020-08-28 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Rapid repair material and process for CRTSI (China railway track System) type slab ballastless track mortar damage |
| JP7420646B2 (en) * | 2020-05-28 | 2024-01-23 | 日本特殊塗料株式会社 | A method of filling gaps, cracks, dents, electrical distribution boxes, and piping joints in structures with polyurethane clear filler. |
| CN111621256B (en) * | 2020-06-12 | 2022-03-22 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Rapid maintenance material and preparation method thereof |
| CN112159511B (en) * | 2020-09-15 | 2022-09-06 | 山东省交通科学研究院 | Polyether polyurethane grouting material and method for treating grout pumping diseases of asphalt pavement |
| CN113480714A (en) * | 2021-07-29 | 2021-10-08 | 山东润义金新材料科技股份有限公司 | Epoxy resin modified polyurethane reinforcing material and preparation method thereof |
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| KR100467765B1 (en) * | 2002-02-04 | 2005-01-24 | 에스케이씨 주식회사 | Composition for Polyurethane Elastomer Having High Hardness and Excellent Abrasion Resistance |
| DE102006030391A1 (en) * | 2006-07-01 | 2008-01-10 | Bayer Materialscience Ag | Foamed and massive polyurethane elastomers based on 1,5-naphthalene diisocyanate, process for their preparation and their use |
| CN101885827B (en) * | 2009-05-11 | 2012-01-04 | 上海合达聚合物科技有限公司 | Double-component polyurethane caulking agent for repairing road cracks |
| CN103992633B (en) * | 2014-05-08 | 2016-07-13 | 中国铁道科学研究院铁道建筑研究所 | A kind of polyurethane caulking material for ballastless track of high-speed railway expansion joint |
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