CN115162061A - Shock-absorbing ballastless track plate and preparation method thereof - Google Patents
Shock-absorbing ballastless track plate and preparation method thereof Download PDFInfo
- Publication number
- CN115162061A CN115162061A CN202210939824.XA CN202210939824A CN115162061A CN 115162061 A CN115162061 A CN 115162061A CN 202210939824 A CN202210939824 A CN 202210939824A CN 115162061 A CN115162061 A CN 115162061A
- Authority
- CN
- China
- Prior art keywords
- parts
- pouring
- track plate
- shock
- absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
A shock-absorbing ballastless track plate and a preparation method thereof are characterized by comprising a track plate, an adhesive layer, an elastomer, an adhesive layer and a base which are sequentially distributed from top to bottom; the preparation method comprises the following steps: s1, cleaning the bottom surface of the track slab and the surface of a base to dry and clean the track slab without dust, sundries or residual chemical materials; s2, adhering the elastic bodies on the surfaces of the bases, wherein each base needs to be provided with two elastic bodies for supporting the base; s3, wrapping the elastic body by utilizing a prefabricated foam fence; s4, placing the track plate on the prefabricated foam fence, and forming a bonding glue layer filling cavity among the prefabricated foam fence, the track plate and the elastic body; the invention has the advantages that: the elastomer is filled under the track slab and is used as a vibration damping material, so that the method is suitable for designing low-rigidity vibration damping fasteners and portable prefabricated limiting structures of urban rails and is suitable for full-automatic rapid on-site pouring equipment technology of multi-component adhesive on-site construction.
Description
Technical Field
The invention relates to the field of track construction, in particular to a shock-absorbing and no-scale track plate and a preparation method thereof.
Background
At present, urban rail transit is a hot spot for development and construction of various major cities in the world due to the advantages of convenience, rapidness, punctuality, energy conservation and effective relief of ground traffic congestion. According to statistics, in urban rail transit operation and construction lines in Beijing, ballastless rails are generally adopted as rail structures, vibration reduction type ballastless rails such as elastic long sleeper type, trapezoidal sleeper type and floating plate type are adopted as vibration reduction type ballastless rails in vibration reduction sections according to different requirements, and the types of the rail structures in other urban rail transit are similar to that of the vibration reduction type ballastless rails, so that the ballastless rail construction scale in the urban rail transit industry of China is large in a period of time in the future. The existing damping technical scheme is that Ethylene Propylene Diene Monomer (EPDM) foam material, ethylene Vinyl Acetate (EVA) foam material and Ethylene Propylene Diene Monomer (EPDM) foam material are used as semi-general synthetic rubber, and the use temperature range is-55-150 ℃. Because the main chain is composed of chemically stable saturated hydrocarbon and only contains unsaturated double bonds in the side chain, the modified epoxy resin has outstanding performances of ozone resistance, weather resistance, water resistance, steam resistance and chemical resistance (such as ammonia water, alcohol, hydrogen peroxide, salt, sulfuric acid, caustic soda, lime and the like), and can be widely used for automobile parts,
The waterproof material for building, the sheath of wire and cable, the heat-resistant rubber tube, the adhesive tape, the sealing element of automobile and so on, but the aging resistance, the high temperature resistance and the dynamic and static rigidity are poor, so the waterproof material is not suitable to be selected as the damping material.
The Ethylene Vinyl Acetate (EVA) foam material is prepared by copolymerizing ethylene (E) and Vinyl Acetate (VA), has good flexibility and rubber-like elasticity, and can still have good flexibility, transparency and surface gloss at 0 ℃, good chemical stability, and good aging resistance and ozone resistance. It can be widely used in foam plastic slippers, sandals, building materials, etc. The injection-molded foam has various industrial parts, female soles and the like, and is not suitable for special environments because the foam material has strong water absorption performance and poor high-temperature resistance due to good plasticity, is very expensive after special treatment and has poor composite performance with other materials.
From the earlier-stage construction and operation experience, the following problems exist in the urban rail transit rail construction of China: 1. the cast-in-place concrete construction is mainly adopted, and the construction efficiency is low; 2. the quality of cast-in-place concrete is difficult to control, and the durability problem is more prominent; 3. and the lower part foundation is directly connected, so that the maintainability is poor.
Description of the drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a schematic side view structure of the invention.
Disclosure of Invention
The invention aims to provide a shock-absorbing and ballastless track plate and a preparation method thereof, aiming at the defects.
The invention comprises a track plate, an adhesive layer, an elastomer, an adhesive layer and a base which are sequentially distributed from top to bottom;
the preparation method comprises the following steps:
s1, cleaning the bottom surface of the track slab and the surface of a base to dry and clean the track slab without dust, sundries or residual chemical materials;
s2, adhering the elastic bodies on the surfaces of the bases, wherein each base needs to be provided with two elastic bodies for supporting the base;
s3, wrapping the elastic body by using a prefabricated foam fence;
s4, placing the track plate on the prefabricated foam fence, and forming a bonding glue layer filling cavity among the prefabricated foam fence, the track plate and the elastic body;
s5, pouring the three-component adhesive into a stirring barrel according to the proportion requirement of the mixing proportion, fully stirring to uniformly mix the three-component adhesive for 3-5min, mechanically stirring, fully stirring the three components up, down, left and right by an electric stirrer at the rotating speed of 300-2000 rpm, standing for 1min after the mixed solution is stirred, and subpackaging the stirred mixed solution into a perfusion container;
s6, under the condition of 5-35 ℃, pouring adhesive into the adhesive layer pouring cavity through the pouring hole in the track slab by the pouring container until the whole adhesive layer pouring cavity is filled, sealing the pouring hole after pouring, and waiting for curing for 12-48 hours;
and S7, removing the prefabricated foam fence, and finishing the manufacturing of the shock-absorbing and shock-free track plate.
Further, the preparation method is as follows:
prefabrication:
s1, cleaning the bottom surface of the track slab and the surface of a base to dry and clean the track slab without dust, sundries or residual chemical materials;
s2, adhering the elastic bodies on the surfaces of the bases, wherein each base needs to be provided with two elastic bodies for supporting the base, and the base with the elastic bodies is obtained;
molding:
s3, placing the base with the elastic body on a construction site where the elastic body is needed, and wrapping the elastic body by utilizing a prefabricated foam fence;
s4, placing the track plate on the prefabricated foam fence, wherein a bonding glue layer filling cavity is formed among the prefabricated foam fence, the track plate and the elastic body;
s5, pouring the three-component adhesive into a stirring barrel according to the proportion requirement of the mixing proportion, fully stirring to uniformly mix the three-component adhesive for 3-5min, mechanically stirring, fully stirring the three components up, down, left and right by an electric stirrer at the rotating speed of 300-2000 rpm, standing for 1min after the mixed solution is stirred, and subpackaging the stirred mixed solution into a perfusion container;
s6, under the condition of 5-35 ℃, pouring adhesive into the adhesive layer pouring cavity through the pouring hole in the track slab by the pouring container until the whole adhesive layer pouring cavity is filled, sealing the pouring hole after pouring, and waiting for curing for 12-48 hours;
s7, removing the prefabricated foam fence, and finishing the manufacturing of the shock-absorbing ballastless track plate on a construction site.
Further, the elastomer height is 30MM, and the adhesive layer height is 10MM.
Further, the adhesive layer is a three-component adhesive.
Further, the elastomer comprises the following components in parts by weight:
200 parts of polyamide thermoplastic elastomer
100 portions of nitrile rubber
5 portions of paraffin
Semi-reinforcing carbon black 35 parts
Dicumyl peroxide 4 parts
4 portions of anti-aging agent
Isonicotinamide 1.5 parts
2,6-difluoro-4-bromoiodobenzene 4 parts.
The method comprises the following specific steps:
s1, heating the polyamide thermoplastic elastomer and the nitrile rubber in parts by weight to 130-135 ℃, dehydrating in vacuum, adding the isonicotinamide and the 2,6-difluoro-4-bromoiodobenzene in parts by weight, continuously stirring, and heating to 140-145 ℃;
and S2, adding the paraffin, the semi-reinforcing carbon black, the dicumyl peroxide and the anti-aging agent in parts by weight into the mixture of the S1, pouring into a mold, heating to 160-165 ℃, and continuously mixing and stirring for 2-4 hours to obtain the elastomer material.
Further, the adhesive comprises the following components in parts by weight:
component A
Isocyanate 22 parts
32 portions of polyether polyol
Component B
7 parts of polyol
Chain extender 6 parts
Anti-aging agent 1.2 parts
1.1 parts of anti-ultraviolet agent
0.6 portion of color paste
1.3 portions of boron carbide powder
Component C
Magnesium hydroxide whisker 1.8 parts
Al 2 O 3 -Y 2 O 3 2.2 parts of whisker.
Further, al 2 O 3 -Y 2 O 3 The preparation method of the whisker comprises the following steps:
dissolving aluminum nitrate in distilled water to prepare a solution with the concentration of 0.5-2.0 mol/L; adding urea with the molar weight 2-10 times that of aluminum nitrate into an aluminum nitrate solution, and uniformly stirring at normal temperature to obtain transparent and clear sol; then placing the prepared sol in a reaction kettle, and keeping the temperature at 90-120 ℃ for 6-12h to obtain a white precipitate of an alumina whisker precursor; washing the white precipitate with distilled water, and roasting at 1100-1300 deg.C for 2-12h to obtain aluminum oxide whisker;
adding the alumina whisker into aqueous solution of polyvinyl alcohol to prepare suspension with 20wt% of solid content, adding aqueous solution of yttrium nitrate hexahydrate into the suspension to obtain mixed solution, adjusting the pH of the mixed solution to 8, depositing yttrium hydroxide on the surface of the alumina whisker to form precipitate, filtering, cleaning and calcining the precipitate to obtain Al 2 O 3 -Y 2 O 3 A whisker.
Furthermore, the calcining temperature is 1350-1400 ℃, and the calcining time is 2-4h.
Further, adjusting pH of the mixed solution with alkalescent substance such as ammonia water, sodium carbonate or sodium bicarbonate.
Further, the polyether polyol is polytetrahydrofuran or polyethylene oxide or polypropylene oxide polyol.
The invention has the advantages that: the novel plate-type ballastless track system based on polyurethane on-site pouring is developed by adopting the elastomer to fill under the track plate and serving as a vibration damping material, is suitable for the design of low-rigidity vibration damping fasteners and portable prefabricated limiting structures of urban rails and the full-automatic rapid on-site pouring equipment technology suitable for multi-component glue on-site construction, effectively solves or relieves the problems of high cost of vibration and noise control measures, long construction period of cast-in-place ballastless tracks and the like in the construction link of the ballastless tracks of urban track traffic, and promotes the development of urban track traffic in China.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the present invention is used to usually place, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Comprises a track plate, an adhesive layer, an elastomer, an adhesive layer and a base which are sequentially distributed from top to bottom;
the preparation method comprises the following steps:
s1, cleaning the bottom surface of the track slab and the surface of a base to dry and clean the track slab without dust, sundries or residual chemical materials;
s2, adhering the elastic bodies on the surfaces of the bases, wherein each base needs to be provided with two elastic bodies for supporting the base;
s3, wrapping the elastic body by utilizing a prefabricated foam fence;
s4, placing the track plate on the prefabricated foam fence, and forming a bonding glue layer filling cavity among the prefabricated foam fence, the track plate and the elastic body;
s5, pouring the three-component adhesive into a stirring barrel according to the proportion requirement of the mixing proportion, fully stirring to uniformly mix the three-component adhesive for 3-5min, mechanically stirring, fully stirring the three components up, down, left and right by an electric stirrer at the rotating speed of 300-2000 rpm, standing for 1min after the mixed solution is stirred, and subpackaging the stirred mixed solution into a perfusion container;
s6, under the condition of 5-35 ℃, pouring adhesive into the adhesive layer pouring cavity through the pouring hole in the track slab by the pouring container until the whole adhesive layer pouring cavity is filled, sealing the pouring hole after pouring, and waiting for curing for 12-48 hours;
s7, removing the prefabricated foam fence, and finishing the manufacturing of the shock-absorbing ballastless track plate.
Further, the preparation method is as follows:
prefabrication:
s1, cleaning the bottom surface of the track slab and the surface of a base to dry and clean the track slab without dust, sundries or residual chemical materials;
s2, adhering the elastic bodies to the surfaces of the bases, wherein each base needs to be provided with two elastic bodies to support the base, and thus the base with the elastic bodies is obtained;
molding:
s3, placing the base with the elastic body on a construction site where the elastic body is needed, and wrapping the elastic body by utilizing a prefabricated foam fence;
s4, placing the track plate on the prefabricated foam fence, and forming a bonding glue layer filling cavity among the prefabricated foam fence, the track plate and the elastic body;
s5, pouring the three-component adhesive into a stirring barrel according to the proportion requirement of the mixing proportion, fully stirring to uniformly mix the three-component adhesive for 3-5min, mechanically stirring, fully stirring the three components up, down, left and right by an electric stirrer at the rotating speed of 300-2000 rpm, standing for 1min after the mixed solution is stirred, and subpackaging the stirred mixed solution into a perfusion container;
s6, under the condition of 5-35 ℃, pouring adhesive into the adhesive layer pouring cavity through the pouring hole in the track slab by the pouring container until the whole adhesive layer pouring cavity is filled, sealing the pouring hole after pouring, and waiting for curing for 12-48 hours;
s7, removing the prefabricated foam fence, and finishing the manufacturing of the shock-absorbing and shock-free track plate on a construction site.
Further, the elastomer height is 30MM, and the adhesive layer height is 10MM.
Further, the adhesive layer is a three-component adhesive.
Further, the elastomer comprises the following components in parts by weight:
200 parts of polyamide thermoplastic elastomer
100 portions of nitrile rubber
5 portions of paraffin
Semi-reinforcing carbon black 35 parts
Dicumyl peroxide 4 parts
4 portions of anti-aging agent
Isonicotinamide 1.5 parts
2,6-difluoro-4-bromoiodobenzene 4 parts.
The method comprises the following specific steps:
s1, heating the polyamide thermoplastic elastomer and the nitrile rubber in parts by weight to 130-135 ℃, dehydrating in vacuum, adding the isonicotinamide and the 2,6-difluoro-4-bromoiodobenzene in parts by weight, continuously stirring, and heating to 140-145 ℃;
and S2, adding the paraffin, the semi-reinforcing carbon black, the dicumyl peroxide and the anti-aging agent in parts by weight into the mixture of the S1, pouring into a mold, heating to 160-165 ℃, and continuously mixing and stirring for 2-4 hours to obtain the elastomer material.
Further, the adhesive comprises the following components in parts by weight:
component A
Isocyanate 22 parts
32 portions of polyether polyol
Component B
7 parts of polyol
Anti-aging agent 1.2 parts
1.1 parts of anti-ultraviolet agent
0.6 portion of color paste
1.3 portions of boron carbide powder
Component C
Magnesium hydroxide whisker 1.8 parts
Al 2 O 3 -Y 2 O 3 2.2 parts of whisker.
Further, al 2 O 3 -Y 2 O 3 The preparation method of the whisker comprises the following steps:
dissolving aluminum nitrate in distilled water to prepare a solution with the concentration of 0.5-2.0 mol/L; adding urea with the molar weight 2-10 times that of the aluminum nitrate into the aluminum nitrate solution, and uniformly stirring at normal temperature to obtain transparent and clear sol; then placing the prepared sol in a reaction kettle, and keeping the temperature of the reaction kettle at 90-120 ℃ for 6-12h to obtain a white precipitate of an alumina whisker precursor; washing the white precipitate with distilled water, and roasting at 1100-1300 deg.C for 2-12h to obtain alumina whisker;
adding the alumina whisker into aqueous solution of polyvinyl alcohol to prepare suspension with 20wt% of solid content, adding aqueous solution of yttrium nitrate hexahydrate into the suspension to obtain mixed solution, adjusting the pH of the mixed solution to 8, depositing yttrium hydroxide on the surface of the alumina whisker to form precipitate, filtering, cleaning and calcining the precipitateTo obtain Al 2 O 3 -Y 2 O 3 A whisker.
Furthermore, the calcining temperature is 1350-1400 ℃, and the calcining time is 2-4h.
Further, adjusting pH of the mixed solution with alkalescent substance such as ammonia water, sodium carbonate or sodium bicarbonate.
Further, the polyether polyol is polytetrahydrofuran or polyethylene oxide or polypropylene oxide polyol.
The operation conditions are as follows:
1. the base layer treatment construction is strictly forbidden on a base surface with open water or damp, and the moisture content of the concrete surface is less than 30 percent.
2. After the buffer elastomer and the fence are installed, the interior of the filling system should be kept dry, and water cannot enter.
3. The construction can be carried out when the daily average temperature ranges from 5 ℃ to 35 ℃.
5. The technical quality requirement is as follows:
1. the surface of the base plate is ensured to be flat, completely dry, clean, frost-free and dirt-free.
2. When the buffering elastic body is installed, the bottom surface of the elastic body and the base of the track slab are completely bonded and dense, and no hollowing or tilting exists.
3. And during pouring, pouring the three-component adhesive into a stirring barrel according to the proportion requirement of the mixing proportion, fully stirring to uniformly mix the three-component adhesive, wherein the stirring time is 3-5min, water is not required during stirring, the three-component adhesive must be stirred by a mechanical method, an electric stirrer is fully stirred up, down, left and right at a rotating speed of 300-2000 r/min, in order to prevent excessive bubbles from being brought, standing the mixed liquid for 1min after stirring, subpackaging the stirred mixed liquid into a pouring container for pouring, and avoiding spilling during subpackaging and pouring.
4. After the pouring is finished, the construction tool is cleaned by adopting special cleaning liquid.
Note that:
1. construction on a wet, water-laden surface can result in foaming or bulging.
2. If the three components are not operated in proportion, there may occur a phenomenon of non-curing, a cold flow phenomenon (the state of which is curing first and then dissolving), or a phenomenon of hardening of the gel.
3. If the three components are not uniformly stirred, the phenomenon of non-solidification or the cold flow phenomenon also occurs.
4. It is not necessary to use a fan or the like to shorten the drying time.
6. The quality requirement is as follows:
1. the flatness of the base surface was checked and the level was allowed to vary only gently with a deviation of + -20.5 mm.
2. Before the plate falls, the bonding state of the buffer elastic body and the base of the track plate is checked, and the conditions of hollowing, tilting and the like are not allowed to be not compact.
3. Before pouring, the pouring can be carried out without moisture in the cavity.
4. And (3) field inspection of a construction unit:
4.1 Visual field observation: after the pouring is finished and the solidification is finished, the materials which are respectively partially overflowed are cut, the formed bonding layer is tightly bonded with the concrete and the cushion layer, the surface is smooth, and the phenomena of bulging, missing coating, bubble free, cracking free, hollowing free, foreign matter mixing or crack free are avoided.
4.2 And (3) thickness detection: the thickness was checked with a probe and 5 spots were measured every 50 slits.
2. The material requirements are as follows:
1. in order to prevent the product quality from being influenced by the environmental climate, the product must be stored on a wooden frame and in a proper place; the ideal storage place of the product is a ventilated and dry room, which can not be piled in the open air, and the storage temperature is high
Should not exceed 50 deg.C, and is not affected by climate and operation.
2. The product should be protected from direct sunshine, rain and snow, sealed and intact, and should not contact with materials affecting product quality such as acid, alkali, oil, organic solvent, etc., and be more than 1m away from heat source.
3. When the liquid material is used, if the whole barrel of material cannot be used up at one time, the barrel cover must be covered tightly after each use, so that water vapor and impurities are prevented from entering the barrel to influence the quality.
4. If more than two materials of the brand A (B) are used, the materials are piled according to the brand and have obvious marks.
Actually measuring the vibration reduction effect, compared with non-vibration reduction, the vibration reduction structure has the vibration level of the acceleration of the basic vibration reduction effect larger than 20dB and the root mean square difference value of the vibration acceleration of 1-200Hz larger than 17 dB, and completely meets the design requirement.
Selecting polyurethane material as the preformed elastic layer of the track slab. The track plate and the offline foundation realize flexible contact. And the performance indexes of the supporting layer are adjusted, so that the vibration reduction requirements of different sections are met. By adopting a special process, the prefabricated layer is compounded at the bottom of the track slab, and the prefabricated layer is provided with a field pouring fence or a pouring bag and leaves the factory together with the track slab. The cast-in-place layer mainly has a filling and adjusting function, and different vibration reduction sections all adopt uniform materials. In the non-vibration-damping section, the rigidity of the supporting layer is 1MPa/mm, and when the vibration damping effect is more than 10dB, the rigidity of the supporting layer is 05MPa/mm, and 0.3MPa/mm and 0.1MPa/mm are taken as intermediate transition sections.
As shown in the chart, the damping road section and the transition section are planned to be paved by adopting a method of prefabricating a TGTD + cast-in-place filling layer for the first time, so that the quality stability of the product is effectively controlled, and the construction difficulty on site is reduced. Experiments show that a load displacement hysteresis curve shows that the supporting layer has good elastic recovery capacity and good following performance under the action of dynamic cyclic loading.
As shown in the chart, the filling layer is filled on the non-damping road section by using special equipment, the rapid and accurate positioning of the track slab can be realized, and the construction speed test of reaching 200-250 m/day of a single working surface shows that under the action of 1.5 times of dead axle weight, the vertical displacement of the non-damping plate is 0.36mm, and the vertical and transverse fatigue tests of the track structure for 300 ten thousand times show that the mechanical properties and the deformation of the track structure before and after fatigue have no obvious difference.
The elastomer comprises the following components in parts by weight:
200 parts of polyamide thermoplastic elastomer
100 portions of nitrile rubber
5 portions of paraffin
Semi-reinforcing carbon black 35 parts
Dicumyl peroxide 4 parts
4 portions of anti-aging agent
Isonicotinamide 1.5 parts
2,6-difluoro-4-bromoiodobenzene 4 parts.
The preparation method of the polyamide thermoplastic elastomer comprises the following steps: firstly, carrying out acylation reaction on succinic acid and polyether amine D400 to obtain a succinic acid chain extension polyether amine soft segment; and then carrying out ring-opening polymerization reaction on the succinic acid chain-extended polyether amine soft segment, lactam and a ring-opening agent to obtain a polyamide 6 prepolymer and a thermoplastic elastomer prepolymer, carrying out amide exchange reaction on the polyamide 6 prepolymer and the thermoplastic elastomer prepolymer, and finally casting a belt, pulling a strip, pelletizing and drying to obtain the polyamide thermoplastic elastomer. Wherein the number average molecular weight of the soft segment of the chain extension polyether amine is 3000-4000. The temperature of the ring-opening polymerization reaction is 250 ℃, the pressure of the ring-opening polymerization reaction is 0.25MPa, and the time of the ring-opening polymerization reaction is 4h.
The anti-aging agent is a mixture of styrenated phenol and dioctyl phthalate with the mass ratio of 50.
The semi-reinforcing carbon black has a particle size of 80 nm.
A method of preparing an elastomeric material comprising the steps of:
s1, heating the polyamide thermoplastic elastomer and the nitrile rubber in parts by weight to 130 ℃, dehydrating in vacuum, adding the isonicotinamide and the 2,6-difluoro-4-bromoiodobenzene in parts by weight, continuously stirring and heating to 140 ℃;
and S2, adding the paraffin, the semi-reinforcing carbon black, the dicumyl peroxide and the anti-aging agent in parts by weight into the mixture of the S1, pouring into a mold, heating to 160 ℃, and continuously mixing and stirring for 2 hours to obtain the elastomer material.
The total time of the S1 and S2 operation steps was 4h.
< comparative example 1>
Commercially available elastomeric materials.
< comparative example 2>
The other ingredients and preparation were the same as in example 3, except that isonicotinamide and 2,6-difluoro-4-bromoiodobenzene were not added.
< detection experiment >
The physical testing data of the elastomer material prepared by the method, corresponding to each example and comparative example are compared, and are shown in the following table 1:
TABLE 1
The elastomer materials prepared by the method are compared with the detection data of the corresponding substance content, the water impermeability and the color appearance of each example and comparative example, and the following table 2 shows that:
TABLE 2
The tensile elastic modulus, tensile strength and retention rate test data of the elastomer materials prepared by the method are compared with those of the comparative examples, and are shown in the following table 3:
TABLE 3
As can be seen from Table 3, the tensile modulus of elasticity of the elastomeric materials of examples 1-3 is significantly better than that of comparative examples 1 and 2, indicating that they have good elastic recovery, significantly better than the industry standard tensile modulus of elasticity of 0.3MPa (23. + -. 2 ℃ C.) and 0.6MP (-30. + -. 2 ℃ C.). The tensile strength of examples 1-3 is also significantly better than comparative examples 1 and 2, and the tensile strength is high, both significantly better than the 3MPa tensile strength industry standard.
The preparation method of the adhesive comprises the following steps:
the paint comprises the following components in parts by weight:
component A
Isocyanate 22 parts
32 portions of polyether polyol
Component B
7 parts of polyol
Anti-aging agent 1.2 parts
1.1 parts of anti-ultraviolet agent
0.6 portion of color paste
Boron carbide powder 1.3 parts
Component C
Magnesium hydroxide whisker 1.8 parts
Al 2 O 3 -Y 2 O 3 2.2 parts of whisker.
Wherein, al 2 O 3 -Y 2 O 3 The preparation method of the whisker comprises the following steps:
dissolving aluminum nitrate in distilled water to prepare a solution with the concentration of 1.2 mol/L; adding urea with the molar weight 5 times that of the aluminum nitrate into the aluminum nitrate solution, and uniformly stirring at normal temperature to obtain transparent and clear sol; then placing the prepared sol in a reaction kettle, and keeping the sol at the temperature of 100 ℃ for 8 hours to obtain a white precipitate of an alumina whisker precursor; washing the white precipitate with distilled water, and roasting at 1200 deg.C for 6 hr to obtain alumina crystal whisker;
adding the alumina whisker into aqueous solution of polyvinyl alcohol to prepare suspension with solid content of 20wt%, and adding aqueous solution of yttrium nitrate hexahydrate into the suspension to obtain the productAdjusting the pH of the mixed solution to 8, depositing yttrium hydroxide on the surface of the alumina whisker to form a precipitate, filtering and cleaning the precipitate, and calcining to obtain Al 2 O 3 -Y 2 O 3 A whisker.
The calcining temperature is 1350 ℃ and the calcining time is 3h.
And ammonia water is selected for adjusting the pH of the mixed solution.
The polyether polyol is polyoxypropylene polyol.
The isocyanate is m-toluene diisocyanate.
The polyol is 1,2-propanediol.
< detection experiment >
The comprehensive performance of the sealing material prepared by the method is tested. The corresponding test data for each example and comparative example are compared as shown in the following table:
the sealing material disclosed by the invention is small in density, high in bonding strength, good in durability, wide in applicable base material, environment-friendly and pollution-free, and has excellent wear resistance and excellent resilience. Magnesium hydroxide whisker and Al 2 O 3 -Y 2 O 3 The crystal whisker is added into the components as a special thixotropic agent, and plays a good role in synergy. The magnesium hydroxide whisker is particularly suitable for a humid environment, can form a strong hydrogen bond in the process of contacting with water, and effectively enhances the adhesion and the recoverability. Al (Al) 2 O 3 -Y 2 O 3 The addition of whiskers also effectively enhances the durability of the sealing material.
Claims (10)
1. A shock-absorbing ballastless track plate and a preparation method thereof are characterized by comprising a track plate, an adhesive layer, an elastomer, an adhesive layer and a base which are sequentially distributed from top to bottom;
the preparation method comprises the following steps:
s1, cleaning the bottom surface of the track slab and the surface of a base to dry and clean the track slab without dust, sundries or residual chemical materials;
s2, adhering the elastic bodies on the surfaces of the bases, wherein each base needs to be provided with two elastic bodies for supporting the base;
s3, wrapping the elastic body by utilizing a prefabricated foam fence;
s4, placing the track plate on the prefabricated foam fence, and forming a bonding glue layer filling cavity among the prefabricated foam fence, the track plate and the elastic body;
s5, pouring the three-component adhesive into a stirring barrel according to the proportion requirement of the mixing proportion, fully stirring to uniformly mix the three-component adhesive for 3-5min, mechanically stirring, fully stirring the three components up, down, left and right by an electric stirrer at the rotating speed of 300-2000 rpm, standing for 1min after the mixed solution is stirred, and subpackaging the stirred mixed solution into a perfusion container;
s6, under the condition of 5-35 ℃, pouring adhesive into the adhesive layer pouring cavity through the pouring hole in the track slab by the pouring container until the whole adhesive layer pouring cavity is filled, sealing the pouring hole after pouring, and waiting for curing for 12-48 hours;
and S7, removing the prefabricated foam fence, and finishing the manufacturing of the shock-absorbing and shock-free track plate.
2. The shock-absorbing ballastless track plate and the manufacturing method thereof according to claim 1, wherein the manufacturing method comprises the following steps:
prefabrication:
s1, cleaning the bottom surface of the track slab and the surface of a base to dry and clean the track slab without dust, sundries or residual chemical materials;
s2, adhering the elastic bodies on the surfaces of the bases, wherein each base needs to be provided with two elastic bodies for supporting the base, and the base with the elastic bodies is obtained;
molding:
s3, placing the base with the elastic body on a construction site where the elastic body is needed, and wrapping the elastic body by utilizing a prefabricated foam fence;
s4, placing the track plate on the prefabricated foam fence, and forming a bonding glue layer filling cavity among the prefabricated foam fence, the track plate and the elastic body;
s5, pouring the three-component adhesive into a stirring barrel according to the proportion requirement of the mixing proportion, fully stirring to uniformly mix the three-component adhesive for 3-5min, mechanically stirring, fully stirring the three components up, down, left and right by an electric stirrer at the rotating speed of 300-2000 rpm, standing for 1min after the mixed solution is stirred, and subpackaging the stirred mixed solution into a perfusion container;
s6, under the condition of 5-35 ℃, pouring adhesive into the adhesive layer pouring cavity through the pouring hole in the track plate by the pouring container until the whole adhesive layer pouring cavity is filled, sealing the pouring hole after pouring is finished, and waiting for curing for 12-48 hours;
s7, removing the prefabricated foam fence, and finishing the manufacturing of the shock-absorbing and shock-free track plate on a construction site.
3. The shock-absorbing ballastless track plate and the manufacturing method thereof according to claim 1, wherein the elastomer height is 30MM and the adhesive layer height is 10MM.
4. The shock-absorbing ballastless track plate and the preparation method thereof according to claim 1, wherein the adhesive layer is a three-component adhesive.
5. The shock-absorbing ballastless track plate and the manufacturing method thereof according to claim 1, wherein the elastomer comprises the following components in parts by weight:
200 parts of polyamide thermoplastic elastomer
100 portions of nitrile rubber
5 portions of paraffin
Semi-reinforcing carbon black 35 parts
Dicumyl peroxide 4 parts
4 portions of anti-aging agent
Isonicotinamide 1.5 parts
2,6-difluoro-4-bromoiodobenzene 4 parts.
The method comprises the following specific steps:
s1, heating the polyamide thermoplastic elastomer and the nitrile rubber in parts by weight to 130-135 ℃, dehydrating in vacuum, adding the isonicotinamide and the 2,6-difluoro-4-bromoiodobenzene in parts by weight, continuously stirring, and heating to 140-145 ℃;
and S2, adding the paraffin, the semi-reinforcing carbon black, the dicumyl peroxide and the anti-aging agent in parts by weight into the mixture of the S1, pouring into a mold, heating to 160-165 ℃, and continuously mixing and stirring for 2-4 hours to obtain the elastomer material.
6. The shock-absorbing ballastless track plate and the preparation method thereof according to claim 1, wherein the adhesive comprises the following components in parts by weight:
component A
Isocyanate 22 parts
32 parts of polyether polyol
Component B
7 parts of polyol
Chain extender 6 parts
Anti-aging agent 1.2 parts
1.1 parts of anti-ultraviolet agent
0.6 portion of color paste
Boron carbide powder 1.3 parts
Component C
Magnesium hydroxide whisker 1.8 parts of
Al 2 O 3 -Y 2 O 3 2.2 parts of whisker.
7. The shock-absorbing ballastless track plate and the manufacturing method thereof according to claim 6, wherein Al is added 2 O 3 -Y 2 O 3 The preparation method of the whisker comprises the following steps:
dissolving aluminum nitrate in distilled water to prepare a solution with the concentration of 0.5-2.0 mol/L; adding urea with the molar weight 2-10 times that of the aluminum nitrate into the aluminum nitrate solution, and uniformly stirring at normal temperature to obtain transparent and clear sol; then placing the prepared sol in a reaction kettle, and keeping the temperature of the reaction kettle at 90-120 ℃ for 6-12h to obtain a white precipitate of an alumina whisker precursor; washing the white precipitate with distilled water, and roasting at 1100-1300 deg.C for 2-12h to obtain aluminum oxide whisker;
adding the alumina whisker into aqueous solution of polyvinyl alcohol to prepare suspension with 20wt% of solid content, adding aqueous solution of yttrium nitrate hexahydrate into the suspension to obtain mixed solution, adjusting the pH of the mixed solution to 8, depositing yttrium hydroxide on the surface of the alumina whisker to form precipitate, filtering, cleaning and calcining the precipitate to obtain Al 2 O 3 -Y 2 O 3 And (3) whiskers.
8. The shock-absorbing ballastless track plate and the manufacturing method thereof according to claim 6, wherein the calcination temperature is 1350 to 1400 ℃ and the calcination time is 2 to 4 hours.
9. The shock-absorbing ballastless track plate and the preparation method thereof according to claim 6, wherein the weakly alkaline substance is selected for adjusting the pH of the mixed solution, and the weakly alkaline substance can be ammonia water, sodium carbonate or sodium bicarbonate.
10. The shock-absorbing ballastless plate and the preparation method thereof according to claim 6, wherein the polyether polyol is polytetrahydrofuran or polyethylene oxide or polypropylene oxide polyol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210939824.XA CN115162061A (en) | 2022-08-05 | 2022-08-05 | Shock-absorbing ballastless track plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210939824.XA CN115162061A (en) | 2022-08-05 | 2022-08-05 | Shock-absorbing ballastless track plate and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115162061A true CN115162061A (en) | 2022-10-11 |
Family
ID=83480303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210939824.XA Pending CN115162061A (en) | 2022-08-05 | 2022-08-05 | Shock-absorbing ballastless track plate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115162061A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073916A (en) * | 2022-08-05 | 2022-09-20 | 河北秦启新材料技术有限公司 | Elastomer material for expansion joint and preparation method thereof |
-
2022
- 2022-08-05 CN CN202210939824.XA patent/CN115162061A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073916A (en) * | 2022-08-05 | 2022-09-20 | 河北秦启新材料技术有限公司 | Elastomer material for expansion joint and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101805588B (en) | Polyurethane road caulking sealant with good durability and production process | |
| CN102822419B (en) | Composite road surface structure | |
| CN104558489B (en) | Railway ballast flexible polyurethane foam material and preparation method thereof | |
| CN115162061A (en) | Shock-absorbing ballastless track plate and preparation method thereof | |
| CN101220203A (en) | Polyurethane chemical grouting material and production method | |
| CN109251292B (en) | Polyurethane latent curing agent, single-component polyurethane waterproof coating and preparation method | |
| CN111748310A (en) | Double-component polyurethane adhesive and preparation method thereof | |
| US8029854B2 (en) | Concrete repair process | |
| CN102604368B (en) | NCO replaced crosslinking cured joint filling material for concrete pavement | |
| CN108587545B (en) | Single-component silane modified polyether sealant for ALC (alcohol-vinyl alcohol) board and preparation method thereof | |
| CN104449534A (en) | Primer-free polyurethane glass cement and preparation method thereof | |
| CN110527066B (en) | Environment-friendly high-urea-bond fast-curing single-component polyurea material and preparation method thereof | |
| CN111978912A (en) | Organic silicon modified polyurethane sealing material and preparation method thereof | |
| CN109423253A (en) | A kind of one-component high elongation at tear de-oxime type silicone filleting glue and preparation method thereof | |
| CN113684003B (en) | Two-component room temperature vulcanized silicone rubber composition | |
| CN106047264B (en) | A kind of viscoelastic polyurethane gum deposit and its application and construction method in bonding external-wall heat-insulation material | |
| CN1326966C (en) | Organic silicon modified polyurethane gap-filling rubber for cement road | |
| BG100224A (en) | Isocyanate/polyolreactive resin | |
| CN110527482B (en) | Special two-component caulking waterproof sealant for railway ballastless track and preparation method thereof | |
| CN101580672A (en) | Special high-performance spray polyurethane elastic waterproof anti-corrosive paint and preparation method thereof | |
| CN103003336A (en) | Polymer composition, method for applying such composition and use of such composition in railway track structures | |
| CN215164318U (en) | Silicon PU energy court | |
| CN105237699A (en) | Polyurethane soft foam material for curing ballast bed and preparation method thereof | |
| KR20030064660A (en) | polyurethane adhesive for flooring and process | |
| CN103374111A (en) | Preparation method of slow-resilience polyurethane flexible foam stock solution for automotive steering wheel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |