CN108046662B - Elastic concrete for embedded track and preparation method thereof - Google Patents
Elastic concrete for embedded track and preparation method thereof Download PDFInfo
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- CN108046662B CN108046662B CN201711345174.1A CN201711345174A CN108046662B CN 108046662 B CN108046662 B CN 108046662B CN 201711345174 A CN201711345174 A CN 201711345174A CN 108046662 B CN108046662 B CN 108046662B
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- 239000004567 concrete Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title description 6
- 239000010426 asphalt Substances 0.000 claims abstract description 18
- 239000003208 petroleum Substances 0.000 claims abstract description 18
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 13
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 12
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 239000007822 coupling agent Substances 0.000 claims abstract description 12
- 239000012948 isocyanate Substances 0.000 claims abstract description 12
- 239000004014 plasticizer Substances 0.000 claims abstract description 12
- 229920000570 polyether Polymers 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 11
- 229920005862 polyol Polymers 0.000 claims abstract description 11
- 150000003077 polyols Chemical class 0.000 claims abstract description 11
- 230000003449 preventive effect Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000004575 stone Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 7
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229940124543 ultraviolet light absorber Drugs 0.000 claims abstract description 5
- 235000019738 Limestone Nutrition 0.000 claims abstract description 4
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims abstract description 4
- 239000006028 limestone Substances 0.000 claims abstract description 4
- 239000003607 modifier Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 47
- 238000001816 cooling Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 8
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- IZUPBVBPLAPZRR-UHFFFAOYSA-N pentachlorophenol Chemical compound OC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl IZUPBVBPLAPZRR-UHFFFAOYSA-N 0.000 claims description 6
- 239000005725 8-Hydroxyquinoline Substances 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 5
- 229960003540 oxyquinoline Drugs 0.000 claims description 5
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- MURWRBWZIMXKGC-UHFFFAOYSA-N Phthalsaeure-butylester-octylester Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC MURWRBWZIMXKGC-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 229960000892 attapulgite Drugs 0.000 claims description 3
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- NMCCNOZOBBWFMN-UHFFFAOYSA-N davicil Chemical compound CS(=O)(=O)C1=C(Cl)C(Cl)=NC(Cl)=C1Cl NMCCNOZOBBWFMN-UHFFFAOYSA-N 0.000 claims description 3
- 229960002380 dibutyl phthalate Drugs 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical group [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052625 palygorskite Inorganic materials 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920001451 polypropylene glycol Polymers 0.000 claims description 3
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 3
- ZXZKYYHTWHJHFT-UHFFFAOYSA-N quinoline-2,8-diol Chemical compound C1=CC(=O)NC2=C1C=CC=C2O ZXZKYYHTWHJHFT-UHFFFAOYSA-N 0.000 claims description 3
- WKEDVNSFRWHDNR-UHFFFAOYSA-N salicylanilide Chemical compound OC1=CC=CC=C1C(=O)NC1=CC=CC=C1 WKEDVNSFRWHDNR-UHFFFAOYSA-N 0.000 claims description 3
- 229950000975 salicylanilide Drugs 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 229920002635 polyurethane Polymers 0.000 abstract description 7
- 239000004814 polyurethane Substances 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- IBOFVQJTBBUKMU-UHFFFAOYSA-N 4,4'-methylene-bis-(2-chloroaniline) Chemical compound C1=C(Cl)C(N)=CC=C1CC1=CC=C(N)C(Cl)=C1 IBOFVQJTBBUKMU-UHFFFAOYSA-N 0.000 description 2
- 241001112258 Moca Species 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- AGWVZWIARZZIIK-UHFFFAOYSA-N 6,6-dichloro-4-methylcyclohexa-2,4-diene-1,1-diamine Chemical compound CC1=CC(Cl)(Cl)C(N)(N)C=C1 AGWVZWIARZZIIK-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- -1 mildew preventive Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00008—Obtaining or using nanotechnology related materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses elastic concrete for an embedded track, which comprises A, B, C components, wherein the component A is polyurethane prepolymer, the component B is a curing agent added with a modifier, the component C is 4-20 meshes of basalt or limestone stone, and the weight ratio of the component A to the component B to the component C is 100: 20-60: 450 to 600. The component A consists of polyether polyol, isocyanate and a filler; the component B consists of petroleum asphalt, 4-diamino-3, 3-dichlorophenyl methane, a coupling agent, a defoaming agent, a mildew preventive, an antioxidant 1010, an ultraviolet light absorber UV-327, a catalyst and a plasticizer. According to the invention, the polyurethane is modified by using the reaction of active hydrogen in the petroleum asphalt and isocyanate groups, so that the polyurethane has the toughness of long carbon chains and keeps stronger bonding performance, and the hardness of the obtained concrete is improved by compounding stone.
Description
Technical Field
The invention relates to elastic concrete for an embedded track and a preparation method thereof, belonging to the technical field of tracks.
Background
The embedded track system is used as a novel ballastless track system, and the mode that the traditional ballastless track adopts fasteners to discretely support and fix steel rails is changed. The rail system is characterized in that a high polymer composite material is poured into a rail bearing groove, and a steel rail is coated after the high polymer composite material is solidified, so that the rail system can replace a traditional fastener to play a role in continuously supporting and fixing the steel rail. However, the pure polyurethane polymer material is used as the casting material, and the interface agent is also needed for bonding the polymer material with the steel rail and the rail bearing groove, so that the defects of high cost and low construction efficiency exist.
Disclosure of Invention
The invention aims to: in order to solve the problems, the elastic concrete for the embedded track and the preparation method thereof are provided, petroleum asphalt is added to modify polyurethane, then stone is compounded, and the elastic concrete is formed after solidification, so that the construction procedures are reduced and the material cost is greatly reduced on the premise of ensuring the material performance index.
The technical scheme adopted by the invention is as follows:
the elastic concrete for the embedded track comprises A, B, C components, wherein the component A is a polyurethane prepolymer, the component B is a curing agent added with a modifier, the component C is 4-20-mesh basalt or limestone stone, and the weight ratio of the component A to the component B to the component C is 100: 20-60: 450 to 600. In the component A, the weight ratio of polyether polyol, isocyanate and filler is 100: 20-50: 10 to 50. In the component B, the weight ratio of petroleum asphalt, 4-diamino-3, 3-dichlorophenyl methane, a coupling agent, a defoaming agent, a mildew preventive, an antioxidant 1010, an ultraviolet light absorber UV-327, a catalyst and a plasticizer is 20-60: 50-110: 5-15: 2-6: 4-8: 1-4: 1-3: 0.2-1.1: 2 to 10.
Preferably, in the component A, the polyether polyol is one or more of polyethylene glycol, polypropylene glycol and polytetrahydrofuran ether glycol, the relative molecular mass is 1000-3000, the isocyanate is at least one of toluene diisocyanate and diphenylmethane diisocyanate, the filler is one or more of white carbon black, silica micropowder, calcium carbonate and attapulgite, and the particle size range is 50-100 nm.
Preferably, in the component B, the petroleum asphalt is one or more of 60#, 100#, 140#, 180#, and 200# petroleum asphalt, the coupling agent is siloxane, the defoaming agent is at least one of BYK-060 and BYK-070 produced by BYK chemical company of Germany, the mildew inhibitor is at least one of 8-hydroxyquinoline, 8-hydroxyquinolinone, pentachlorophenol, tetrachloro 4- (methylsulfonyl) pyridine, and salicylanilide, the catalyst is organotin, and the plasticizer is at least one of butyl phthalate and octyl phthalate.
The invention also provides a preparation method of the elastic concrete for the embedded track, which comprises the following steps:
(1) adding polyether polyol into a reaction kettle, stirring, heating to 105-110 ℃, carrying out vacuum dehydration for 1.5-3 h, cooling to 70-80 ℃, adding isocyanate and a filling agent, slowly heating to 80-90 ℃, carrying out constant-temperature reaction for 3-4 h, carrying out vacuum defoaming for 20-30min, preparing an isocyanate-terminated prepolymer, cooling, and preparing a material A for later use;
(2) mixing petroleum asphalt, a curing agent, a coupling agent, a defoaming agent, a mildew preventive, an antioxidant, an ultraviolet absorber and a plasticizer in proportion, heating to 100 ℃ and 125 ℃, stirring, dehydrating in vacuum for 1-3h, cooling to 80-90 ℃, adding a catalyst, stirring for 30-60min, and cooling to prepare a material B for later use;
(3) when the material A, the material B and the material C are used on site, the material A, the material B and the material C are accurately weighed according to the proportion, the material B is firstly added into the material A, the mixture is stirred for 2-3 min by adopting a stirrer, the material C is then added, stirred and mixed uniformly, and the mixture is injected into a region to be cast.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the modification of polyurethane is realized by utilizing the reaction of active hydrogen in petroleum asphalt and isocyanate groups, so that the polyurethane has the toughness of long carbon chains and keeps stronger bonding performance, and the hardness is improved by compounding stone materials, so that the elastic concrete for the embedded track is obtained, and the performance equivalent to that of the prior polyurethane material is realized at lower material cost;
2. the nano filler is introduced, so that the physical and mechanical properties and the heat resistance of the material can be effectively improved;
3. and a proper amount of antioxidant and ultraviolet absorbent are introduced, so that the aging resistance of the material is improved, and the service life of the material is ensured.
Detailed Description
The present invention will be described in detail below.
Example 1:
the elastic concrete for the embedded track comprises A, B, C components, wherein the component A is a polyurethane prepolymer, the component B is a curing agent added with a modifier, the component C is 4-20-mesh basalt or limestone stone, and the weight ratio of the component A to the component B to the component C is 100: 20-60: 450 to 600.
In the component A, the weight ratio of polyether polyol, isocyanate and filler is 100: 20-50: 10 to 50. In the component A, polyether polyol is one or more of polyethylene glycol, polypropylene glycol and polytetrahydrofuran ether glycol, the relative molecular mass is 1000-3000, isocyanate is at least one of toluene diisocyanate and diphenylmethane diisocyanate, and a filler is one or more of white carbon black, silica micropowder, calcium carbonate and attapulgite, and the particle size range is 50-100 nm.
In the component B, the weight ratio of petroleum asphalt, 4-diamino-3, 3-dichlorophenyl methane, a coupling agent, a defoaming agent, a mildew preventive, an antioxidant 1010, an ultraviolet light absorber UV-327, a catalyst and a plasticizer is 20-60: 50-110: 5-15: 2-6: 4-8: 1-4: 1-3: 0.2-1.1: 2 to 10. In the component B, the petroleum asphalt is one or more of No. 60, No. 100, No. 140, No. 180 and No. 200 petroleum asphalt, the coupling agent is siloxane, the defoaming agent is at least one of BYK-060 and BYK-070 produced by Germany BYK chemical company, the mildew preventive is at least one of 8-hydroxyquinoline, 8-hydroxyquinolinone, pentachlorophenol, tetrachloro 4- (methylsulfonyl) pyridine and salicylanilide, the catalyst is organic tin, and the plasticizer is at least one of butyl phthalate and octyl phthalate.
Example 2:
a preparation method of elastic concrete for an embedded track comprises the following steps:
(1) adding polyether polyol into a reaction kettle, stirring, heating to 105-110 ℃, carrying out vacuum dehydration for 1.5-3 h, cooling to 70-80 ℃, adding isocyanate and a filling agent, slowly heating to 80-90 ℃, carrying out constant-temperature reaction for 3-4 h, carrying out vacuum defoaming for 30min, preparing an isocyanate-terminated prepolymer, cooling, and preparing a material A for later use;
(2) mixing petroleum asphalt, curing agent, coupling agent, defoaming agent, mildew preventive, antioxidant, ultraviolet absorber and plasticizer in proportion, heating to 125 ℃, stirring, vacuum dehydrating for 2h, cooling to 80 ℃, adding catalyst, stirring for 30-60min, and cooling to obtain material B for later use;
(3) when the material A, the material B and the material C are used on site, the material A, the material B and the material C are accurately weighed according to the proportion, the material B is firstly added into the material A, the mixture is stirred for 2-3 min by adopting a stirrer, the material C is then added, stirred and mixed uniformly, and the mixture is injected into a region to be cast.
The contents of the above two examples are combined with experimental data to illustrate:
and (2) component A: 100g of polyether Polyol (PEG), 35g of isocyanate (TDI) and 25g of white carbon black (the particle size is 50 nm);
and (B) component: 30g of No. 100 petroleum asphalt, 36g of 4, 4-diamino-3, 3-dichlorophenyl Methane (MOCA), KH-5505 g of coupling agent, BYK-0602.5 g of defoaming agent, 5g of mildew preventive 8-hydroxyquinoline, 10102.5 g of antioxidant, UV-3275 g of ultraviolet light absorbent, 0.3g of catalyst organotin and 5g of plasticizer DBP;
and (3) component C: 100g of 10-20 meshes of stone material;
the mixing ratio is component A: and (B) component: component C = 100: 54: 450 (weight ratio).
The specific production steps are as follows:
(1) adding polyether glycol (PEG) into a reaction kettle, dehydrating for 1-3 hours in vacuum at 105-110 ℃, cooling to 60-70 ℃, sequentially adding white carbon black and isocyanate (TDI), gradually heating to 80-90 ℃, reacting for 3-4 hours in a heat preservation manner, defoaming for 20-30 minutes in vacuum, and cooling to obtain a component A;
(2) mixing 100# petroleum asphalt, 4-diamino-3, 3-dichlorophenyl Methane (MOCA), a coupling agent KH-550, a defoaming agent BYK-060, a mildew preventive 8-hydroxyquinoline, an antioxidant 1010, an ultraviolet light absorber UV-327 and a plasticizer DBP in proportion, heating to 125 ℃, stirring, carrying out vacuum dehydration for 2h, cooling to 80 ℃, adding a catalyst organotin, stirring for 30-60min, and cooling to obtain a component B;
(3) weighing the material A and the material B in proportion, adding the materials into a pouring device, stirring for 3-5 minutes, adding the material C after uniformly mixing, continuing stirring for 2 minutes, and injecting into a prepared container to be poured to obtain the elastic concrete.
The test results of the main performance indexes of the elastic concrete sample piece are as follows:
the compressive strength is 51 MPa; the tensile strength is 6 MPa; bending strength is 18 MPa; low temperature resistance of-70 deg.c, no crack and no damage.
Therefore, the elastic concrete obtained according to the above formulation and manufacturing method is fully capable of meeting the requirements for embedded tracks.
Claims (4)
1. An elastic concrete for embedded rails, characterized in that: the coating comprises A, B, C three components, wherein the component A is a polyurethane prepolymer, the component B is a curing agent added with a modifier, the component C is 4-20 mesh basalt or limestone stone, and the weight ratio of the component A to the component B to the component C is 100: 20-60: 450-600 parts; in the component A, the weight ratio of polyether polyol, isocyanate and filler is 100: 20-50: 10-50, wherein the polyether polyol is one or more of polyethylene glycol, polypropylene glycol and polytetrahydrofuran ether glycol, and the relative molecular mass is 1000-3000; in the component B, the weight ratio of petroleum asphalt, 4-diamino-3, 3-dichlorophenyl methane, a coupling agent, a defoaming agent, a mildew preventive, an antioxidant 1010, an ultraviolet light absorber UV-327, a catalyst and a plasticizer is 20-60: 50-110: 5-15: 2-6: 4-8: 1-4: 1-3: 0.2-1.1: 2 to 10.
2. An elastic concrete for an embedded track according to claim 1, characterized in that: in the component A, the isocyanate is at least one of toluene diisocyanate and diphenylmethane diisocyanate, the filler is one or more of white carbon black, silica micropowder, calcium carbonate and attapulgite, and the particle size range is 50-100 nm.
3. An elastic concrete for an embedded track according to claim 2, characterized in that: in the component B, the petroleum asphalt is one or more of No. 60, No. 100, No. 140, No. 180 and No. 200 petroleum asphalt, the coupling agent is siloxane, the defoaming agent is at least one of BYK-060 and BYK-070 produced by Germany BYK chemical company, the mildew preventive is at least one of 8-hydroxyquinoline, 8-hydroxyquinolinone, pentachlorophenol, tetrachloro 4- (methylsulfonyl) pyridine and salicylanilide, the catalyst is organic tin, and the plasticizer is at least one of butyl phthalate and octyl phthalate.
4. A method of preparing an elastic concrete for an embedded track according to any one of claims 1 to 3, characterized by comprising the steps of:
(1) adding polyether polyol into a reaction kettle, stirring, heating to 105-110 ℃, carrying out vacuum dehydration for 1.5-3 h, cooling to 70-80 ℃, adding isocyanate and a filling agent, slowly heating to 80-90 ℃, carrying out constant-temperature reaction for 3-4 h, carrying out vacuum defoaming for 20-30min, preparing an isocyanate-terminated prepolymer, cooling, and preparing a material A for later use;
(2) mixing petroleum asphalt, 4-diamino-3, 3-dichlorophenyl methane, a coupling agent, a defoaming agent, a mildew preventive, an antioxidant 1010, an ultraviolet light absorbent UV-327 and a plasticizer in proportion, heating to 100 ℃ and 125 ℃, stirring, dehydrating in vacuum for 1-3h, cooling to 80-90 ℃, adding a catalyst, stirring for 30-60min, and cooling to prepare a material B for later use;
(3) when the material A, the material B and the material C are used on site, the material A, the material B and the material C are accurately weighed according to the proportion, the material B is firstly added into the material A, the mixture is stirred for 2-3 min by adopting a stirrer, the material C is then added, stirred and mixed uniformly, and the mixture is injected into a region to be cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711345174.1A CN108046662B (en) | 2017-12-15 | 2017-12-15 | Elastic concrete for embedded track and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711345174.1A CN108046662B (en) | 2017-12-15 | 2017-12-15 | Elastic concrete for embedded track and preparation method thereof |
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| Publication Number | Publication Date |
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| CN108046662A CN108046662A (en) | 2018-05-18 |
| CN108046662B true CN108046662B (en) | 2020-10-09 |
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