CN116790127A - Environment-friendly noise-reducing ultrathin complex rock asphalt cement for cover surface and preparation method thereof - Google Patents
Environment-friendly noise-reducing ultrathin complex rock asphalt cement for cover surface and preparation method thereof Download PDFInfo
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- CN116790127A CN116790127A CN202310718057.4A CN202310718057A CN116790127A CN 116790127 A CN116790127 A CN 116790127A CN 202310718057 A CN202310718057 A CN 202310718057A CN 116790127 A CN116790127 A CN 116790127A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 113
- 239000011435 rock Substances 0.000 title claims abstract description 78
- 239000004568 cement Substances 0.000 title claims description 30
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 229920001971 elastomer Polymers 0.000 claims abstract description 31
- 239000005060 rubber Substances 0.000 claims abstract description 31
- 150000001875 compounds Chemical class 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000004523 catalytic cracking Methods 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 9
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- 239000000084 colloidal system Substances 0.000 claims description 7
- 238000010008 shearing Methods 0.000 claims description 7
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229920002223 polystyrene Polymers 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- QUCDWLYKDRVKMI-UHFFFAOYSA-M sodium;3,4-dimethylbenzenesulfonate Chemical group [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1C QUCDWLYKDRVKMI-UHFFFAOYSA-M 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 229940048842 sodium xylenesulfonate Drugs 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 238000011161 development Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 125000003118 aryl group Chemical group 0.000 abstract description 4
- 229920006395 saturated elastomer Polymers 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 abstract description 2
- 239000004035 construction material Substances 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 230000032683 aging Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- JPLDTMNKTSTSBS-UHFFFAOYSA-N cyano formate Chemical group O=COC#N JPLDTMNKTSTSBS-UHFFFAOYSA-N 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 239000010920 waste tyre Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses an environment-friendly noise-reducing ultrathin overlay compound rock asphalt cementing material and a preparation method thereof, and relates to the technical field of road construction materials; the mixed catalytic cracking slurry oil is a byproduct of a catalytic cracking device of a refinery, is rich in aromatic components and saturated components, has good compatibility with rock asphalt and rubber powder, and can effectively activate resin components in the rock asphalt, soften the rubber powder and swell sulfur bridge structures.
Description
Technical field:
the invention relates to the technical field of road construction materials, in particular to an environment-friendly noise-reducing ultrathin complex rock asphalt cement for a cover surface and a preparation method thereof.
The background technology is as follows:
under the dual actions of traffic load and climate factors, the performances of flatness, skid resistance, travelling comfort and the like of the pavement layer are gradually reduced along with the time, and the travelling safety and the service life of the pavement layer are seriously influenced. The ultrathin overlay technology is a novel thin overlay technology, can be applied to preventive maintenance or corrective maintenance of slight diseases of a road surface with high traffic volume and high road surface performance requirements, is a more durable pavement layer, and has the characteristics of skid resistance, abrasion resistance, noise reduction and the like.
The rock asphalt is a famous natural asphalt, has particularly stable properties, and can greatly improve the high-temperature rutting, aging resistance, durability and water stability of the asphalt mixture. The Xinjiang, qinghai and Sichuan of China have natural rock asphalt with rich reserves, the natural rock asphalt mineral reserves of more than 140 ten thousand tons in Qinghuan county of Sichuan province are currently ascertained, and are known as 'natural mineral bodies rare in China or even the world' by experts, and the reserve bureau is the first nationwide. However, the simple use of the rock asphalt modified asphalt generally has the problems of poor low-temperature performance, unstable storage and the like, which greatly limits the application of the rock asphalt.
The invention comprises the following steps:
the technical problem to be solved by the invention is to provide a compound rock asphalt modification technology, wherein the rock asphalt and rubber powder are pretreated by FCC catalytic cracking slurry oil rich in aromatic compounds and rubber, so that the low-temperature performance of the rock asphalt modified asphalt is improved, and the storage stability is improved; and the composite rock asphalt cement for the environment-friendly noise-reducing ultrathin cover surface is prepared by combining the composite rock asphalt modification technology and the ultrathin cover surface technology, and can be applied to pavement thin layers of preventive maintenance or corrective maintenance of slight diseases.
The technical problems to be solved by the invention are realized by adopting the following technical scheme:
the invention aims at providing an environment-friendly noise-reducing ultrathin complex rock asphalt cement for a cover surface, which comprises the following components in percentage by mass:
in the invention, the SBS modified asphalt belongs to the field of SBS I-D in technical Specification for construction of Highway asphalt pavement (JTG F40-2004), but is higher than the Specification.
The technical indexes of the SBS modified asphalt comprise softening point, ductility at 5 ℃ and Brookfield viscosity at 135 ℃. Preferably, the softening point of the SBS modified asphalt is more than or equal to 70 ℃, the ductility at 5 ℃ is more than or equal to 20cm, and the viscosity at 135 ℃ is less than 2.5Pa.S.
Preferably, the rock asphalt is one of Buton rock asphalt (BMA), north American rock asphalt (Gilsonite), xinjiang Clama Ubbelo rock asphalt, sichuan green rock asphalt or a combination thereof.
The technical indexes of the rock asphalt comprise water content, ash content and chloroform solubility. Preferably, the fineness of the rock asphalt is 600-800 meshes, the water content is less than or equal to 2%, the ash content is less than or equal to 15%, and the chloroform solubility is more than or equal to 35%.
In the invention, after the rock asphalt is treated by catalytic cracking (FCC) slurry oil, the gum component in the rock asphalt can be activated, and the use effect of the rock asphalt is effectively improved.
Preferably, the fineness of the rubber powder is 40-60 meshes, the carbon black content is more than or equal to 28%, and the rubber hydrocarbon content is 42-65%. The rubber powder can absorb hydrocarbon components in the catalytic cracking slurry oil to swell and disperse in asphalt in particle form.
In the invention, the compact structure of the rubber powder pretreated by the catalytic cracking slurry oil is swelled and destroyed under the action of aromatic component and saturated component, and the rubber powder is strongly sheared during blending, so that the rubber powder particles are separated into smaller particles and release more soluble components, thereby being more beneficial to the stable compatibility of the rubber powder and asphalt.
In the invention, the catalytic cracking slurry oil is closer to asphalt in composition, contains more aromatic components and saturated components, can soften the rubber powder and swell a sulfur bridge structure by soaking the rubber powder, can activate gum components in the rock asphalt, and can dissociate the rubber powder and the rock asphalt into smaller particles and more soluble components by strong shearing and stirring in the blending process, thereby ensuring the modification effect of macromolecular substances and small particles of the rubber powder and the rock asphalt on the asphalt and ensuring stable storage at high temperature without phase separation.
The catalytic cracking slurry oil is used as a pretreatment agent for rock asphalt and rubber powder, and can improve the thermal storage stability, low-temperature flexibility and elastic recovery performance of the modified asphalt, so that the asphalt viscoelastic interval is obviously widened.
Preferably, the high molecular polymer consists of polystyrene-polyethylene-polybutene-polystyrene (SEBS) and TPU polyurethane, and the mass ratio of the two is 2:3.
The SEBS is formed by the polybutadiene of SBS with hydrogenation degree of more than 90% and the Polystyrene (PS) segment without hydrogenation (hydrogenation degree of less than 10%), and the polyethylene/butylene soft segment and the polystyrene hard segment respectively play roles of high elasticity and crosslinking point. The cyano formate group in the TPU polyurethane molecule can improve the rheological and thermodynamic properties of asphalt, and the mechanical properties of asphalt are improved through the space crosslinking structure formed in the asphalt.
Preferably, the compatibilizing agent is N-tallow-1, 3-propylene diamine.
Preferably, the stabilizer is sodium xylene sulfonate.
The compatilizer can swell the modifier, increase the distance between the chain segments and change the flexibility of the polymer. The stabilizer can improve the thermal stability of the compound rock asphalt cement, reduce the surface tension of polymer particle interfaces and increase the affinity between polymer phases and asphalt phases.
The invention also aims to provide a preparation method of the environment-friendly noise-reducing ultrathin overlay compound rock asphalt cement, which comprises the following steps:
s1, pretreatment: mixing rock asphalt, rubber powder and catalytic cracking slurry oil, and then placing the mixture in a vacuum drying oven for swelling pretreatment to obtain a mixed solution;
s2, preparing a compound rock asphalt cement:
(1) Heating SBS modified asphalt to 170-180 ℃;
(2) Heating to 185-190 ℃, adding the mixed solution obtained in the step S1, and shearing at a high speed;
(3) Reducing the temperature to 180-185 ℃, adding a high molecular polymer, and shearing at medium speed;
(4) Adjusting the temperature to 175-185 ℃, adding a compatilizer, and mechanically stirring;
(5) Adjusting the temperature to 165-175 ℃, adding a stabilizer, and mechanically stirring;
(6) Performing colloid milling to obtain a compound rock asphalt cement;
s3, development and storage: placing the compound rock asphalt cement into a storage tank at 160-170 ℃ for 6-7 h, and storing for later use.
The rotating speed of the high-speed shearing is 5000-6000 r/min, and the time is 60-70 min.
The rotation speed of the medium-speed shearing is 3000-4000 r/min, and the time is 30-40 min.
The gap between the colloid mill and the colloid mill is adjusted to 0.25-0.3 unit, and the colloid mill is performed for 2-3 times.
According to the invention, the rock asphalt can improve the high-temperature performance and the ageing resistance of the asphalt, the rubber powder can improve the low-temperature performance of the cementing material, the overall performance of the cementing material is improved by means of the extremely strong cross-linked network structure of the high-molecular polymer, and the environment-friendly noise-reducing ultrathin finishing surface compound rock asphalt cementing material with high-low temperature performance and balanced internal structure is prepared.
The beneficial effects of the invention are as follows:
1. according to the invention, by utilizing the characteristics of large molecular weight, high softening point and strong oxidation resistance of the rock asphalt, the compound rubber powder and the high polymer are utilized to improve the low-temperature performance of the rock asphalt modified asphalt, and the compound rock asphalt cement with balanced high-low-temperature performance is prepared;
2. the blended catalytic cracking slurry oil is a byproduct of a catalytic cracking device of a refinery, is rich in aromatic components and saturated components, has good compatibility with rock asphalt and rubber powder, and can effectively activate resin components in the rock asphalt, soften the rubber powder and swell sulfur bridge structures;
3. the rock asphalt and the rubber powder in the compound rock asphalt cement have excellent ageing resistance, and can greatly delay the ageing of the environment-friendly ultrathin finish-face cement; secondly, the extremely strong adsorption capacity of the rock asphalt can greatly enhance the cohesive force of the asphalt, improve the anti-stripping capacity of the cementing material and improve the durability of the pavement;
4. the preparation method of the environment-friendly noise-reducing ultrathin finishing surface compound rock asphalt cement provided by the invention is simple and convenient to operate, can reduce carbon emission and saves energy consumption.
The specific embodiment is as follows:
the present invention will be further described with reference to the following examples in order to make the technical means, the creation characteristics, the achievement of the objects and the effects of the present invention easy to understand.
The sources and compositions of the raw materials in the following examples and comparative examples are illustrated:
the SBS modified asphalt is PG82-22 grade SBS modified asphalt.
The rock asphalt is Indonesia bunton rock asphalt with an asphalt content of 28.2%, a chloroform solubility of 37.8%, a heating loss of 0.76%, and a colloid 35.51% and an asphaltene 21.77% by four-component chemical component analysis.
The rubber powder is commercial 40-mesh waste tire rubber powder and contains 31.5% of carbon black.
The FCC catalytic cracking slurry oil is filtered and separated to remove solid particles, and the four-component chemical component analysis shows that saturated hydrocarbon is 32.6%, aromatic hydrocarbon is 65.8% and colloid asphaltene is 6.8%.
The high polymer is obtained by smelting SEBS and TPU polyurethane (the mass ratio of the SEBS to the TPU polyurethane is 2:3) at a high temperature of 170 ℃.
The compatilizer is N-tallow-1, 3-propylene diamine with the purity of 90% which is sold in the market, wherein the CAS:61791-55-7.
The stabilizer is commercial sodium xylene sulfonate, CAS:1300-72-7.
Example 1
The composition of the compound rock asphalt cement:
64.1% of SBS modified asphalt, 12% of rock asphalt, 6% of rubber powder, 12% of FCC catalytic cracking slurry oil, 5% of high polymer, 0.5% of compatilizer and 0.4% of stabilizer in percentage by mass.
Example 2
The composition of the compound rock asphalt cement:
76.5% of SBS modified asphalt, 8% of rock asphalt, 4% of rubber powder, 8% of FCC catalytic cracking slurry oil, 3% of high polymer, 0.3% of compatilizer and 0.2% of stabilizer in percentage by mass.
Comparative example 1
SBS modified asphalt.
Comparative example 2
The composition of the compound rock asphalt cement:
84.5% of SBS modified asphalt, 8% of rock asphalt, 4% of rubber powder, 3% of high molecular polymer, 0.3% of compatilizer and 0.2% of stabilizer in percentage by mass.
The performance test was performed on the formulated rock asphalt cements prepared in example 1, example 2 and comparative example 2 and the SBS modified asphalt of comparative example 1, and the results are shown in table 1.
The test items include penetration, softening point, ductility, elastic recovery, toughness, elastic recovery, performance of residue after TFOT, test methods are referred to in Highway engineering asphalt and asphalt mixture test Specification (JTG E20-2011).
TABLE 1
As can be seen from Table 1, the softening point, dynamic viscosity at 60 ℃, viscosity (25 ℃), toughness (25 ℃) and elastic recovery (25 ℃) of the examples are all higher than those of comparative example 1, and the quality change and ductility (5 ℃) of the examples after TFOT are close to those of comparative example 1, thus demonstrating that the cementing material compounded by adding FCC catalytic cracking slurry oil, rock asphalt and rubber powder can be used for replacing PG82-22 grade SBS modified asphalt. And the softening point, the dynamic viscosity at 60 ℃ and the penetration after TFOT aging are higher than those of the comparative example 2, but other technical indexes are lower than those of the examples, so that the FCC catalytic cracking slurry oil is proved to reduce the softening point of the compound rock modified asphalt, but obviously improve the viscosity toughness and the ageing resistance.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The environment-friendly noise-reducing ultra-thin finish-face compound rock asphalt cement is characterized by comprising the following components in percentage by mass:
2. the environment-friendly noise-reducing ultra-thin mat coat-used compound rock asphalt cement according to claim 1, which is characterized in that: the rock asphalt is one or a combination of Buton rock asphalt, north American rock asphalt, xinjiang Clamamma Ubbelopsis rock asphalt and Sichuan Qingchuan rock asphalt.
3. The environment-friendly noise-reducing ultra-thin mat coat-used compound rock asphalt cement according to claim 1, which is characterized in that: the softening point of the SBS modified asphalt is more than or equal to 70 ℃, the ductility at 5 ℃ is more than or equal to 20cm, and the viscosity at 135 ℃ is less than 2.5Pa.S.
4. The environment-friendly noise-reducing ultra-thin mat coat-used compound rock asphalt cement according to claim 1, which is characterized in that: the fineness of the rock asphalt is 600-800 meshes, the water content is less than or equal to 2%, the ash content is less than or equal to 15%, and the chloroform solubility is more than or equal to 35%.
5. The environment-friendly noise-reducing ultra-thin mat coat-used compound rock asphalt cement according to claim 1, which is characterized in that: the fineness of the rubber powder is 40-60 meshes, the carbon black content is more than or equal to 28%, and the rubber hydrocarbon content is 42-65%.
6. The environment-friendly noise-reducing ultra-thin mat coat-used compound rock asphalt cement according to claim 1, which is characterized in that: the high molecular polymer consists of polystyrene-polyethylene-polybutene-polystyrene and TPU polyurethane, and the mass ratio of the polystyrene to the polyethylene to the polybutene-polystyrene to the TPU polyurethane is 2:3.
7. The environment-friendly noise-reducing ultra-thin mat coat-used compound rock asphalt cement according to claim 1, which is characterized in that: the compatilizer is N-tallow-1, 3-propylene diamine.
8. The environment-friendly noise-reducing ultra-thin mat coat-used compound rock asphalt cement according to claim 1, which is characterized in that: the stabilizer is sodium xylene sulfonate.
9. The method for preparing the environment-friendly noise-reducing ultrathin finishing compound rock asphalt cement according to any one of claims 1 to 8, which is characterized by comprising the following steps:
s1, pretreatment: mixing rock asphalt, rubber powder and catalytic cracking slurry oil, and then placing the mixture in a vacuum drying oven for swelling pretreatment to obtain a mixed solution;
s2, preparing a compound rock asphalt cement:
(1) Heating SBS modified asphalt to 170-180 ℃;
(2) Heating to 185-190 ℃, adding the mixed solution obtained in the step S1, and shearing at a high speed;
(3) Reducing the temperature to 180-185 ℃, adding a high molecular polymer, and shearing at medium speed;
(4) Adjusting the temperature to 175-185 ℃, adding a compatilizer, and mechanically stirring;
(5) Adjusting the temperature to 165-175 ℃, adding a stabilizer, and mechanically stirring;
(6) Performing colloid milling to obtain a compound rock asphalt cement;
s3, development and storage: placing the compound rock asphalt cement into a storage tank at 160-170 ℃ for 6-7 h, and storing for later use.
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