CN113603398B - Anti-icing and noise-reducing asphalt mixture and preparation method thereof - Google Patents
Anti-icing and noise-reducing asphalt mixture and preparation method thereof Download PDFInfo
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- 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
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- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0071—Phase-change materials, e.g. latent heat storage materials used in concrete compositions
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
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- 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
- C04B2111/52—Sound-insulating materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention discloses an anti-icing and noise-reducing asphalt mixture and a preparation method thereof, wherein the anti-icing and noise-reducing asphalt mixture comprises asphalt, aggregates, a filler, rubber powder and water, and the rubber powder is prepared from the following components: the modified polyethylene comprises waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene, wherein the modified polyethylene is prepared from the following components: ethylene, vinylbutanol, paraffin, vinylsiloxane, siloxane diol, isophorone diisocyanate. According to the invention, through the arrangement of the cement-based phase change material, the modified polyethylene component and the preparation process thereof, after the cement-based phase change material and the modified polyethylene component are compounded with asphalt, the asphalt mixture has better rebound resilience and compression resistance, the sensitivity and the water resistance of the asphalt mixture to temperature can be improved, the prepared pavement has lower cohesiveness with ice, and the asphalt mixture is beneficial to driving and pedestrians to apply pressure to break the ice on the pavement so as to realize the ice resistance of the asphalt mixture; due to the structure of the cement-based phase change material and the resilience of the modified asphalt, the generation of noise can be reduced, the adsorption of the asphalt mixture to sound is improved, and the noise pollution is reduced.
Description
Technical Field
The invention relates to the technical field of asphalt mixtures, in particular to an anti-icing and noise-reducing asphalt mixture and a preparation method thereof.
Background
The asphalt mixture is a composite material composed of asphalt, coarse aggregate, fine aggregate, mineral powder and the like, and when the asphalt mixture is applied to various highway environments, polymers, fibers and the like are also added; materials with different properties and suitable for different environments are formed by mixing materials with different specifications and quantities. In the existing highway system, the phenomenon of road surface icing often occurs in winter, which brings hidden danger to the safety of driving and pedestrians, and the ice melting operation of the iced road surface by using industrial salt and the like brings huge burden to the environment. Therefore, the ice-resistant noise-reducing asphalt mixture and the preparation method thereof are provided.
Disclosure of Invention
The invention aims to provide an anti-icing and noise-reducing asphalt mixture and a preparation method thereof, and aims to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: the ice-resistant noise-reducing asphalt mixture comprises asphalt, aggregates, a filler, rubber powder and water, wherein the rubber powder is prepared from the following components: the modified polyethylene comprises waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene, wherein the modified polyethylene is prepared from the following components: ethylene, vinylbutanol, paraffin, vinylsiloxane, siloxane diol, isophorone diisocyanate.
Further, the asphalt mixture comprises the following components in parts by weight: 29.2-33.6 parts of asphalt, 46.5-48.0 parts of aggregate, 0.70-1.5 parts of filler, 17-19 parts of rubber powder and 2.20-2.30 parts of water.
Further, the cement-based phase change material comprises an aerogel/cement composite porous carrier, resin and paraffin.
Further, the aerogel/cement composite porous carrier is prepared from the following components: the resin comprises the following components of fly ash, water glass, silicon dioxide aerogel, polyester fiber and cement, wherein the resin is prepared from the following components: ethylene propylene diene monomer, styrene and butadiene.
Further, the asphalt comprises 50-70 parts by weight of matrix asphalt and 20-50 parts by weight of lake asphalt.
The preparation method of the ice-resistant noise-reducing asphalt mixture comprises the following steps:
(1) preparing rubber powder:
A. preparing a cement-based phase change material:
preparing aerogel slurry by taking fly ash, water glass, silicon dioxide aerogel and polyester fiber as raw materials;
mixing water, a water reducing agent and cement, and adding aerogel slurry to prepare an aerogel/cement composite porous carrier;
performing reaction on ethylene propylene diene monomer, styrene, butadiene and benzoyl peroxide, and adding an aerogel/cement composite porous carrier into a system to prepare resin to obtain a carrier;
soaking the carrier in paraffin to obtain a cement-based phase change material;
B. preparing modified polyethylene:
reacting ethylene and alkene butanol under the action of a catalyst to obtain hydroxyl-containing polyethylene;
reacting paraffin with vinyl siloxane, and reacting the product with siloxane dihydric alcohol to obtain modified paraffin;
and reacting the hydroxyl-containing polyethylene, the modified paraffin and isophorone diisocyanate to obtain the modified polyethylene.
C. Preparing rubber powder:
co-extruding and crushing waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene to obtain rubber powder;
(2) preparing a mixture:
mixing asphalt, aggregate, filler, rubber powder and water to obtain an asphalt mixture.
Further, the step A comprises the following processes:
a1. preparing an aerogel/cement composite porous carrier:
adding the fly ash into a mixed solution of water glass and sodium hydroxide, mixing and stirring for 5-7 min, adding the silicon dioxide aerogel and the polyester fiber, stirring and mixing for 3-5 min to obtain aerogel slurry;
mixing water and a water reducing agent, adding cement, stirring for 2-5 min, adding aerogel slurry, and stirring for 60-90 s; standing for 28-33 d under the environment conditions that the relative humidity is 88-92% and the temperature is 18-22 ℃ to obtain the aerogel/cement composite porous carrier;
in the technical scheme, the mass ratio of the aerogel to the cement is (25-66) to (34-75), the water reducing agent accounts for 3% of the total weight of the system, and the water accounts for 29%; by utilizing the preparation process, the aerogel slurry is introduced into the cement matrix, the pore structure of the prepared porous carrier can be refined, the pore volume is increased, and the high compressive strength is also realized.
a2. Preparation of resin:
mixing deionized water, gelatin and tricalcium phosphate under the protection of nitrogen, heating to 40-45 ℃, and stirring for 5-7 min; adding ethylene propylene diene monomer, styrene and butadiene, mixing, adding benzoyl peroxide, heating to 75-85 ℃, reacting for 8-9 hours, cooling after the reaction is finished, filtering, washing with dilute hydrochloric acid, drying for 24 hours at 60-70 ℃, preparing resin, and preparing powder to obtain a carrier;
a3. preparing a cement-based phase change material:
and immersing the carrier in paraffin at the temperature of 50-55 ℃, taking out and naturally dripping for 5-10 min to obtain the cement-based phase change material.
In the technical scheme, under the action of benzoyl peroxide, ethylene propylene diene monomer, styrene and butadiene react and polymerize in a porous carrier coexistence system, so that the prepared resin is filled in the porous carrier; the absorption capacity of the carrier to paraffin is improved while the compressive resistance is kept, the sensitivity of the prepared modified asphalt to temperature is improved, the adsorption of the prepared asphalt mixture to sound is improved, and the noise pollution is reduced;
the paraffin is adsorbed in a composite system of the porous carrier and the resin, and can improve the compatibility of various materials and prevent phase separation after being mixed with materials such as waste tire powder, modified polyethylene, asphalt and the like; the influence of paraffin on the mechanical property and the durability of the carrier is prevented; the prepared cement-based phase-change material can promote the improvement of the rebound resilience and high-temperature stability of the prepared modified asphalt, and the rebound resilience of the modified asphalt after multiple times of rolling has no obvious change; and the mechanical property of the asphalt mixture can be optimized, the water resistance of the roadbed is improved, and the possibility of instability of the roadbed is reduced.
Further, the step B comprises the following processes:
b1. preparation of hydroxyl-containing polyethylene:
mixing N-hexane, a catalyst N, N' -bis (2,4, 6-triisopropylphenyl) ethylidene acenaphthylene diimine and a cocatalyst of ethyl aluminum dichloride, introducing ethylene, and reacting for 10-30 min at the temperature of 60-70 ℃ and under the pressure of 1.50-2.00 MPa;
adding a catalyst vanadium compound, diethyl aluminum oxide, ethyl trichloroacetate and a toluene solution of alkene butanol, mixing, and reacting at 45-55 ℃ for 18-25 min; after the reaction is finished, pouring the mixture into 5% hydrochloric acid ethanol for quenching reaction, adding the mixture into ice methanol to separate out a product, filtering, washing, and drying at 60-80 ℃ to obtain hydroxyl-containing polyethylene;
b2. preparing modified paraffin:
mixing paraffin and tetramethyl divinyl disiloxane, adding benzoyl peroxide, and reacting at 70-80 ℃ for 12-15 hours; taking the product and polysiloxane dihydric alcohol, and reacting at 300 ℃ under 100-500 atmospheric pressure to obtain modified paraffin;
b3. preparation of modified polyethylene:
taking hydroxyl-containing polyethylene, introducing nitrogen, slowly dropwise adding isophorone diisocyanate, and reacting for 2-3 h at 75-85 ℃; adding modified paraffin and a catalyst dibutyltin dilaurate, heating to 83-88 ℃, and reacting for 2-3 h; and cooling to room temperature, adding triethylamine, and stirring for 15-20 min to obtain the modified polyethylene.
In the technical scheme, the hyperbranched polyethylene with the branched chain containing hydroxyl is prepared by controlling and compounding the catalysts and taking ethylene and alkene butanol as raw materials; reacting double bonds in paraffin and tetramethyl divinyl disiloxane, and carrying out hydrosilylation reaction on the prepared reaction product and polysiloxane dihydric alcohol to synthesize silane modified paraffin with hydroxyl and smaller molecular weight; crosslinking the two compounds by using isophorone diisocyanate to obtain branched modified polyethylene;
after being compounded with materials such as waste tire powder, asphalt and the like, the composite material can improve the water resistance and temperature sensitivity, improve the low-temperature crack resistance and high-temperature rutting resistance, has better elasticity and is beneficial to reducing noise pollution; and the molecules are mutually combined to form a three-dimensional network structure, so that the bonding with the aggregate can be enhanced, and the high-temperature performance and the adhesion of the asphalt are improved.
C. Preparing rubber powder:
co-extruding and crushing waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene to obtain rubber powder; the mass ratio of the waste tire powder to the cement-based phase change material to the modified polyethylene is 8:5: 1; the aggregate contains 3.6 mass percent of mineral powder, the total mass of calcium chloride and sodium chloride is the same as that of the mineral powder, and the mass ratio of the calcium chloride to the sodium chloride is 1: 2.
Further, the step (2) comprises the following processes: heating the matrix asphalt to 160-170 ℃, carrying out high-speed shearing emulsification and shearing at 15000-20000 rpm for 60-80 min, adding rubber powder and lake asphalt in the process, and carrying out static development at the temperature of 100-120 ℃ for 30-40 min to obtain modified asphalt; mixing with aggregate, filler and water to obtain the asphalt mixture.
Compared with the prior art, the invention has the following beneficial effects:
according to the ice-resistant noise-reducing asphalt mixture and the preparation method thereof, by arranging the cement-based phase change material, the modified polyethylene component and the preparation process thereof, after the asphalt mixture is compounded with asphalt, the asphalt mixture has better rebound resilience and compression resistance, the sensitivity and water resistance of the asphalt mixture to temperature can be improved, the prepared pavement has lower cohesiveness with ice, and the ice-resistant performance of the asphalt mixture is realized by applying pressure to break ice on the pavement by driving and pedestrians; due to the structure of the cement-based phase change material and the resilience of the modified asphalt, the generation of noise can be reduced, the adsorption of the asphalt mixture to sound is improved, and the noise pollution is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1
(1) Preparing rubber powder:
A. preparing a cement-based phase change material:
a1. preparing an aerogel/cement composite porous carrier:
adding the fly ash into a mixed solution of water glass and sodium hydroxide, mixing and stirring for 5min, adding the silicon dioxide aerogel and the polyester fiber, stirring and mixing for 3min to obtain aerogel slurry;
mixing water and a water reducing agent, adding cement, stirring for 2min, adding the aerogel slurry, and stirring for 60 s; standing for 28d under the environment conditions of the relative humidity of 88% and the temperature of 18 ℃ to obtain the aerogel/cement composite porous carrier; the mass ratio of the aerogel to the cement is 25: 75;
a2. preparation of the resin:
mixing deionized water, gelatin and tricalcium phosphate under nitrogen protection, heating to 40 deg.C, and stirring for 5 min; adding ethylene propylene diene monomer, styrene and butadiene, mixing, adding benzoyl peroxide, heating to 75 ℃, reacting for 8 hours, cooling, filtering after the reaction is finished, washing with dilute hydrochloric acid, drying for 24 hours at 60 ℃, preparing resin, and preparing powder to obtain a carrier;
a3. preparing a cement-based phase change material:
immersing the carrier in paraffin at the temperature of 50 ℃, taking out the carrier and naturally dripping for 5min to obtain the cement-based phase change material;
B. preparing modified polyethylene:
b1. preparation of hydroxyl-containing polyethylene:
mixing N-hexane, a catalyst N, N' -bis (2,4, 6-triisopropylphenyl) ethylidene acenaphthylene diimine and a cocatalyst of ethyl aluminum dichloride, introducing ethylene, and reacting for 10min at the temperature of 60 ℃ and under the pressure of 1.50 MPa;
adding catalyst vanadium compound, diethyl aluminum oxide, ethyl trichloroacetate and toluene solution of alkene butanol, mixing, and reacting at 45 deg.C for 18 min; after the reaction is finished, pouring the mixture into 5% hydrochloric acid ethanol for quenching reaction, adding the mixture into ice methanol to separate out a product, filtering, washing and drying at 60 ℃ to obtain hydroxyl-containing polyethylene;
b2. preparing modified paraffin:
mixing paraffin and tetramethyl divinyl disiloxane, adding benzoyl peroxide, and reacting at 70 ℃ for 12 hours; taking the product and polysiloxane dihydric alcohol, and reacting at 300 ℃ and 100 atmospheric pressure to obtain modified paraffin;
b3. preparation of modified polyethylene:
taking hydroxyl-containing polyethylene, introducing nitrogen, slowly dropwise adding isophorone diisocyanate, and reacting for 2h at 75 ℃; adding modified paraffin and a catalyst dibutyltin dilaurate, heating to 83 ℃, and reacting for 2 h; and cooling to room temperature, adding triethylamine, and stirring for 15min to obtain the modified polyethylene.
C. Preparing rubber powder:
co-extruding and crushing waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene to obtain rubber powder;
(2) preparing a mixture:
heating the matrix asphalt to 160 ℃, carrying out high-speed shearing emulsification and shearing at 15000rpm for 60min, adding rubber powder and lake asphalt in the process, and carrying out static development at 100 ℃ for 30min to obtain modified asphalt; mixing the asphalt mixture with aggregate, filler and water to obtain an asphalt mixture, wherein the asphalt mixture comprises the following components in parts by weight: 29.2 parts of asphalt, 46.5 parts of aggregate, 0.70 part of filler, 17 parts of rubber powder and 2.20 parts of water.
Example 2
(1) Preparing rubber powder:
A. preparing a cement-based phase change material:
a1. preparing an aerogel/cement composite porous carrier:
adding the mixed solution of water glass and sodium hydroxide into the fly ash, mixing and stirring for 6min, adding the silicon dioxide aerogel and the polyester fiber, stirring and mixing for 4min, and obtaining aerogel slurry;
mixing water and a water reducing agent, adding cement, stirring for 3min, adding aerogel slurry, and stirring for 75 s; standing for 30d under the environmental conditions of relative humidity of 90% and temperature of 20 ℃ to obtain the aerogel/cement composite porous carrier; the mass ratio of the aerogel to the cement is 50: 50;
a2. preparation of resin:
mixing deionized water, gelatin and tricalcium phosphate under nitrogen protection, heating to 42 deg.C, and stirring for 6 min; adding ethylene propylene diene monomer, styrene and butadiene, mixing, adding benzoyl peroxide, heating to 80 ℃, reacting for 8.5 hours, cooling after the reaction is finished, filtering, washing with dilute hydrochloric acid, drying for 24 hours at 65 ℃, preparing resin, and pulverizing to obtain a carrier;
a3. preparing a cement-based phase change material:
immersing the carrier in paraffin at the temperature of 52 ℃, taking out the carrier and naturally dripping for 7min to obtain the cement-based phase change material;
B. preparing modified polyethylene:
b1. preparation of hydroxyl-containing polyethylene:
mixing N-hexane, a catalyst N, N' -bis (2,4, 6-triisopropylphenyl) ethylidene acenaphthylene diimine and a cocatalyst of ethyl aluminum dichloride, introducing ethylene, and reacting for 20min at the temperature of 65 ℃ and under the pressure of 1.75 MPa;
adding catalyst vanadium compound, diethyl aluminum oxide, ethyl trichloroacetate and toluene solution of alkene butanol, mixing, and reacting at 50 deg.C for 20 min; after the reaction is finished, pouring the mixture into 5% hydrochloric acid ethanol for quenching reaction, adding the mixture into ice methanol to separate out a product, filtering, washing and drying at 70 ℃ to obtain hydroxyl-containing polyethylene;
b2. preparing modified paraffin:
mixing paraffin and tetramethyl divinyl disiloxane, adding benzoyl peroxide, and reacting at 75 ℃ for 13 h; taking the product and polysiloxane dihydric alcohol, and reacting at 300 ℃ and 300 atmospheric pressure to obtain modified paraffin;
b3. preparation of modified polyethylene:
taking hydroxyl-containing polyethylene, introducing nitrogen, slowly dropwise adding isophorone diisocyanate, and reacting for 2.5h at 80 ℃; adding modified paraffin and a catalyst dibutyltin dilaurate, heating to 85 ℃, and reacting for 2.5 h; and cooling to room temperature, adding triethylamine, and stirring for 17min to obtain the modified polyethylene.
C. Preparing rubber powder:
co-extruding and crushing waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene to obtain rubber powder;
(2) preparing a mixture:
heating the matrix asphalt to 165 ℃, performing high-speed shearing emulsification and shearing at 18000rpm for 70min, adding rubber powder and lake asphalt in the process, and performing static development at the temperature of 110 ℃ for 35min to obtain modified asphalt; mixing the asphalt mixture with aggregate, filler and water to obtain an asphalt mixture, wherein the asphalt mixture comprises the following components in parts by weight: 31.4 parts of asphalt, 47.2 parts of aggregate, 1.1 parts of filler, 18 parts of rubber powder and 2.25 parts of water.
Example 3
(1) Preparing rubber powder:
A. preparing a cement-based phase change material:
a1. preparing an aerogel/cement composite porous carrier:
adding the mixed solution of water glass and sodium hydroxide into the fly ash, mixing and stirring for 7min, adding the silicon dioxide aerogel and the polyester fiber, stirring and mixing for 5min, and obtaining aerogel slurry;
mixing water and a water reducing agent, adding cement, stirring for 5min, adding aerogel slurry, and stirring for 90 s; standing for 33d under the environment conditions of the relative humidity of 92% and the temperature of 22 ℃ to obtain the aerogel/cement composite porous carrier; the mass ratio of the aerogel to the cement is 66: 34;
a2. preparation of the resin:
mixing deionized water, gelatin and tricalcium phosphate under nitrogen protection, heating to 45 deg.C, and stirring for 7 min; adding ethylene propylene diene monomer, styrene and butadiene, mixing, adding benzoyl peroxide, heating to 85 ℃, reacting for 9 hours, cooling after the reaction is finished, filtering, washing with dilute hydrochloric acid, drying for 24 hours at 70 ℃, preparing resin, and pulverizing to obtain a carrier;
a3. preparing a cement-based phase change material:
immersing the carrier in paraffin at the temperature of 55 ℃, taking out the carrier and naturally dripping for 10min to obtain the cement-based phase change material;
B. preparing modified polyethylene:
b1. preparation of hydroxyl-containing polyethylene:
mixing N-hexane, a catalyst N, N' -bis (2,4, 6-triisopropylphenyl) ethylidene acenaphthylene diimine and a cocatalyst of ethyl aluminum dichloride, introducing ethylene, and reacting for 30min at the temperature of 70 ℃ and under the pressure of 2.00 MPa;
adding catalyst vanadium compound, diethyl aluminum oxide, ethyl trichloroacetate and toluene solution of alkene butanol, mixing, and reacting at 55 deg.C for 25 min; after the reaction is finished, pouring the mixture into 5% hydrochloric acid ethanol for quenching reaction, adding the mixture into ice methanol to separate out a product, filtering, washing and drying at 80 ℃ to obtain hydroxyl-containing polyethylene;
b2. preparing modified paraffin:
mixing paraffin and tetramethyl divinyl disiloxane, adding benzoyl peroxide, and reacting at 80 ℃ for 15 h; taking the product and polysiloxane dihydric alcohol, and reacting at 300 ℃ and 500 atmospheric pressure to obtain modified paraffin;
b3. preparation of modified polyethylene:
taking hydroxyl-containing polyethylene, introducing nitrogen, slowly dropwise adding isophorone diisocyanate, and reacting for 3h at 85 ℃; adding modified paraffin and a catalyst dibutyltin dilaurate, heating to 88 ℃, and reacting for 3 h; cooling to room temperature, adding triethylamine and stirring for 20min to obtain the modified polyethylene.
C. Preparing rubber powder:
co-extruding and crushing waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene to obtain rubber powder;
(2) preparing a mixture:
heating the matrix asphalt to 170 ℃, performing high-speed shearing emulsification and shearing at 20000rpm for 80min, adding rubber powder and lake asphalt during the process, and performing static development at 120 ℃ for 40min to obtain modified asphalt; mixing the asphalt mixture with aggregate, filler and water to obtain an asphalt mixture, wherein the asphalt mixture comprises the following components in parts by weight: 33.6 parts of asphalt, 48.0 parts of aggregate, 1.5 parts of filler, 19 parts of rubber powder and 2.30 parts of water.
Comparative example 1
(1) Preparing rubber powder:
A. taking paraffin as a phase change material;
B. preparing modified polyethylene:
b1. preparation of hydroxyl-containing polyethylene:
mixing N-hexane, a catalyst N, N' -bis (2,4, 6-triisopropylphenyl) ethylidene acenaphthylene diimine and a cocatalyst of ethyl aluminum dichloride, introducing ethylene, and reacting for 10min at the temperature of 60 ℃ and under the pressure of 1.50 MPa;
adding catalyst vanadium compound, diethyl aluminum oxide, ethyl trichloroacetate and toluene solution of alkene butanol, mixing, and reacting at 45 deg.C for 18 min; after the reaction is finished, pouring the mixture into 5% hydrochloric acid ethanol for quenching reaction, adding the mixture into ice methanol to separate out a product, filtering, washing and drying at 60 ℃ to obtain hydroxyl-containing polyethylene;
b2. preparing modified paraffin:
mixing paraffin and tetramethyl divinyl disiloxane, adding benzoyl peroxide, and reacting at 70 ℃ for 12 hours; taking the product and polysiloxane dihydric alcohol, and reacting at 300 ℃ under 100 atmospheric pressure to obtain modified paraffin;
b3. preparation of modified polyethylene:
taking hydroxyl-containing polyethylene, introducing nitrogen, slowly dropwise adding isophorone diisocyanate, and reacting for 2h at 75 ℃; adding modified paraffin and a catalyst dibutyltin dilaurate, heating to 83 ℃, and reacting for 2 h; and cooling to room temperature, adding triethylamine, and stirring for 15min to obtain the modified polyethylene.
C. Preparing rubber powder:
co-extruding and crushing waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride, modified polyethylene and paraffin to obtain rubber powder;
(2) preparing a mixture:
heating the matrix asphalt to 160 ℃, carrying out high-speed shearing emulsification and shearing at 15000rpm for 60min, adding rubber powder and lake asphalt in the process, and carrying out static development at 100 ℃ for 30min to obtain modified asphalt; mixing with aggregate, filler and water to obtain the asphalt mixture.
Comparative example 2
(1) Preparing rubber powder:
A. preparing a cement-based phase change material:
a1. preparing an aerogel/cement composite porous carrier:
adding the mixed solution of water glass and sodium hydroxide into the fly ash, mixing and stirring for 5min, adding the silicon dioxide aerogel and the polyester fiber, stirring and mixing for 3min, and obtaining aerogel slurry;
mixing water and a water reducing agent, adding cement, stirring for 2min, adding aerogel slurry, and stirring for 60 s; standing for 28d under the environment conditions of the relative humidity of 88% and the temperature of 18 ℃ to obtain the aerogel/cement composite porous carrier; the mass ratio of the aerogel to the cement is 25: 75;
a2. preparation of resin:
mixing deionized water, gelatin and tricalcium phosphate under nitrogen protection, heating to 40 deg.C, and stirring for 5 min; adding ethylene propylene diene monomer, styrene and butadiene, mixing, adding benzoyl peroxide, heating to 75 ℃, reacting for 8 hours, cooling, filtering after the reaction is finished, washing with dilute hydrochloric acid, drying for 24 hours at 60 ℃, preparing resin, and preparing powder to obtain a carrier;
a3. preparing a cement-based phase change material:
immersing the carrier in paraffin at the temperature of 50 ℃, taking out the carrier and naturally dripping for 5min to obtain the cement-based phase change material;
B. preparing modified polyethylene:
mixing polyethylene and tetramethyl divinyl disiloxane, adding benzoyl peroxide, and reacting at 70 ℃ for 12 hours; taking the product and polysiloxane dihydric alcohol, and reacting at 300 ℃ under 100 atmospheric pressure;
introducing nitrogen, slowly dropwise adding isophorone diisocyanate, and reacting for 2 hours at 75 ℃; adding 1, 4-butanediol and a catalyst dibutyltin dilaurate, heating to 83 ℃, and reacting for 2 h; and cooling to room temperature, adding triethylamine, and stirring for 15min to obtain the modified polyethylene.
C. Preparing rubber powder:
co-extruding waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene, and crushing to obtain rubber powder;
(2) preparing a mixture:
heating the matrix asphalt to 160 ℃, carrying out high-speed shearing emulsification and shearing at 15000rpm for 60min, adding rubber powder and lake asphalt in the process, and carrying out static development at 100 ℃ for 30min to obtain modified asphalt; mixing with aggregate, filler and water to obtain the asphalt mixture.
Comparative example 3
Taking waste tire powder as rubber powder; heating the matrix asphalt to 160 ℃, carrying out high-speed shearing emulsification and shearing at 15000rpm for 60min, adding rubber powder and lake asphalt in the process, and carrying out static development at 100 ℃ for 30min to obtain modified asphalt; mixing with aggregate, filler and water to obtain the asphalt mixture.
Experiment of
Taking the modified asphalt and the asphalt mixture obtained in the examples 1-3 and the comparative examples 1-3 to prepare samples, respectively detecting the performances of the samples and recording the detection results:
from the data in the table above, it is clear that the following conclusions can be drawn:
the modified asphalt and the asphalt mixture obtained in the examples 1 to 3 are compared with the modified asphalt and the asphalt mixture obtained in the comparative examples 1 to 3, and the detection results show that:
1. compared with the comparative example 3, the experimental data of the modified asphalt and the asphalt mixture obtained in the examples 1 to 3 are superior to that of the comparative example 3, which fully shows that the invention realizes the improvement of the ice resistance and the noise reduction performance of the prepared asphalt mixture;
2. compared with the example 1, the cement-based phase change material in the comparative example 1 is different, the modified polyethylene prepared in the comparative example 2 is different, and the experimental data is deteriorated compared with the example 1, so that the arrangement of the cement-based phase change material, the modified polyethylene component and the preparation process thereof in the application is beneficial to improving the ice resistance and the noise reduction performance of the prepared asphalt mixture.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process method article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process method article or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The preparation method of the ice-resistant noise-reducing asphalt mixture is characterized by comprising the following steps of: the method comprises the following steps:
(1) preparing rubber powder:
A. preparing a cement-based phase change material:
preparing aerogel slurry by taking fly ash, water glass, silicon dioxide aerogel and polyester fiber as raw materials;
mixing water, a water reducing agent and cement, and adding aerogel slurry to prepare an aerogel/cement composite porous carrier;
performing reaction on ethylene propylene diene monomer, styrene, butadiene and benzoyl peroxide, and adding an aerogel/cement composite porous carrier into a system to prepare resin to obtain a carrier;
soaking the carrier in paraffin to obtain a cement-based phase change material;
B. preparing modified polyethylene:
reacting ethylene and alkene butanol under the action of a catalyst to obtain hydroxyl-containing polyethylene;
reacting paraffin with vinyl siloxane, and reacting the product with siloxane dihydric alcohol to obtain modified paraffin;
reacting hydroxyl-containing polyethylene, modified paraffin and isophorone diisocyanate to obtain modified polyethylene;
C. preparing rubber powder:
co-extruding and crushing waste tire powder, a cement-based phase change material, calcium chloride, sodium chloride and modified polyethylene to obtain rubber powder;
(2) preparing a mixture:
mixing asphalt, aggregate, filler, rubber powder and water to obtain an asphalt mixture;
the step A comprises the following processes:
a1. preparing an aerogel/cement composite porous carrier:
adding the fly ash into a mixed solution of water glass and sodium hydroxide, mixing and stirring for 5-7 min, adding the silicon dioxide aerogel and the polyester fiber, stirring and mixing for 3-5 min to obtain aerogel slurry;
mixing water and a water reducing agent, adding cement, stirring for 2-5 min, adding aerogel slurry, and stirring for 60-90 s; standing for 28-33 d under the environment conditions that the relative humidity is 88-92% and the temperature is 18-22 ℃ to obtain the aerogel/cement composite porous carrier;
a2. preparation of the resin:
mixing deionized water, gelatin and tricalcium phosphate under the protection of nitrogen, heating to 40-45 ℃, and stirring for 5-7 min; adding ethylene propylene diene monomer, styrene and butadiene, mixing, adding benzoyl peroxide, heating to 75-85 ℃, reacting for 8-9 hours, cooling after the reaction is finished, filtering, washing with dilute hydrochloric acid, drying for 24 hours at 60-70 ℃, preparing resin, and preparing powder to obtain a carrier;
a3. preparing a cement-based phase change material:
immersing the carrier in paraffin at the temperature of 50-55 ℃, taking out and naturally dripping for 5-10 min to obtain the cement-based phase change material;
the asphalt mixture comprises the following components in parts by weight: 29.2-33.6 parts of asphalt, 46.5-48.0 parts of aggregate, 0.70-1.5 parts of filler, 17-19 parts of rubber powder and 2.20-2.30 parts of water;
the asphalt comprises base asphalt and lake asphalt, wherein the weight ratio of the base asphalt to the lake asphalt is (50-70) to (20-50);
the step (2) comprises the following processes: heating the matrix asphalt to 160-170 ℃, performing high-speed shearing emulsification at 15000-20000 rpm for 60-80 min, adding rubber powder and lake asphalt in the process, and performing static development at 100-120 ℃ for 30-40 min to obtain modified asphalt; mixing with aggregate, filler and water to obtain the asphalt mixture.
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| EP2985309A2 (en) * | 2014-08-11 | 2016-02-17 | Research Institute of Highway Ministry of Transport | Waterborn polymer-modified emulsified asphalt mixture and process for producing the same |
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