CN107473635B - Asphalt concrete and preparation process thereof - Google Patents
Asphalt concrete and preparation process thereof Download PDFInfo
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- CN107473635B CN107473635B CN201710785476.4A CN201710785476A CN107473635B CN 107473635 B CN107473635 B CN 107473635B CN 201710785476 A CN201710785476 A CN 201710785476A CN 107473635 B CN107473635 B CN 107473635B
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- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000010426 asphalt Substances 0.000 claims abstract description 108
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 239000007822 coupling agent Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 18
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 17
- 239000011707 mineral Substances 0.000 claims abstract description 17
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 16
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 16
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000012948 isocyanate Substances 0.000 claims description 31
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims description 31
- 238000010008 shearing Methods 0.000 claims description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 10
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 9
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 9
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 9
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 9
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- FMGBDYLOANULLW-UHFFFAOYSA-N 3-isocyanatopropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCN=C=O FMGBDYLOANULLW-UHFFFAOYSA-N 0.000 claims description 7
- 150000003385 sodium Chemical class 0.000 claims description 7
- RUQIYMSRQQCKIK-UHFFFAOYSA-M sodium;2,3-di(propan-2-yl)naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S([O-])(=O)=O)=C(C(C)C)C(C(C)C)=CC2=C1 RUQIYMSRQQCKIK-UHFFFAOYSA-M 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003712 anti-aging effect Effects 0.000 abstract description 3
- 230000002929 anti-fatigue Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000010215 titanium dioxide Nutrition 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses asphalt concrete and a preparation process thereof, wherein the asphalt concrete has good high-temperature and low-temperature performances, has excellent anti-fatigue, anti-aging and waterproof effects, and can obviously improve the anti-crack and anti-rutting capabilities, thereby improving the comprehensive performance of a pavement and the durability; the viscosity under high-temperature mixing can be reduced, and the pollution of asphalt smoke can be greatly reduced; the performance index of the asphalt mixture is not weakened; saving mixing energy consumption, simple and convenient construction, environmental protection and energy saving. The preparation process comprises the following steps: (1) heating 3-7 parts by weight of asphalt at the temperature of 160-180 ℃ until the asphalt is completely melted to obtain molten asphalt; (2) 95 to 105 weight portions of basalt aggregate, 1 to 3 weight portions of mineral powder, 0.5 to 1.5 weight portions of kaolin and 0.4 to 0.9 weight portion of coupling agent are stirred for 5 to 15 minutes at the temperature of 160-180 ℃ and the rotating speed of 200-500 rpm, and then molten asphalt is added to continue to stir for 5 to 15 minutes at the rotating speed of 200-500 rpm.
Description
Technical Field
The invention relates to the technical field of asphalt concrete, in particular to asphalt concrete and a preparation process thereof.
Background
The asphalt concrete is obtained by mixing, compacting and molding a mineral mixture and an asphalt binder, is one of main materials of a modern road pavement structure, is widely applied to various road pavements, and is particularly suitable for high-speed driving road pavements. The asphalt concrete pavement has the advantages of good mechanical property and pavement performance, smooth and seamless pavement, vibration reduction, fine sound, comfortable driving, high traffic safety and the like, and the asphalt pavement can realize the regeneration of pavement materials, so the asphalt concrete pavement is favored by broad designers and builders in the road construction.
However, with the rapid increase of traffic volume, the increase of vehicle axle load and wheel pressure, and more overload phenomena, the diseases of rutting, cracking, peeling and the like of the asphalt pavement are increasingly serious, so that the asphalt pavement faces a severe test on how to improve the service performance of the asphalt pavement to meet the requirement of traffic development, which is an important subject faced by road workers in China. The service performance of asphalt pavement depends greatly on the service quality of the adopted asphalt mixture, the quality of the asphalt mixture is not ideal firstly because of the non-ideal material quality, and thus the asphalt which has a binding effect in the asphalt mixture is the focus of attention of road researchers. Because the asphalt has insurmountable characteristics such as high-temperature softening, low-temperature embrittlement, easy aging under heating and the like, most of the road performances of the asphalt with large yield and wide coverage in the existing asphalt in China cannot meet the use requirements of high-grade highways, the defects of the asphalt are required to be made up by additional means, the asphalt is modified to achieve the purposes, meanwhile, the modified asphalt technology is adopted to help solve the problem of early damage caused by the improvement of service performance, in addition, the modified asphalt is adopted to certain specific occasions such as bridge deck pavement, road surface, composite road surface, special performance road surface drainage road surface, open-graded anti-sliding and abrasion layer and the like, even if high-quality heavy traffic asphalt is adopted, the use requirements cannot be met necessarily, and the modified asphalt with special performance is adopted. In conclusion, it is imperative to modify asphalt and systematically study modified asphalt and related technologies.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides asphalt concrete and a preparation process thereof.
The technical scheme is as follows:
a preparation process of asphalt concrete comprises the following steps:
(1) heating 3-7 parts by weight of asphalt at the temperature of 160-180 ℃ until the asphalt is completely melted to obtain molten asphalt;
(2) 95 to 105 weight portions of basalt aggregate, 1 to 3 weight portions of mineral powder, 0.5 to 1.5 weight portions of kaolin and 0.4 to 0.9 weight portion of coupling agent are stirred for 5 to 15 minutes at the temperature of 160-180 ℃ and the rotating speed of 200-500 rpm, and then molten asphalt is added to continue to stir for 5 to 15 minutes at the rotating speed of 200-500 rpm.
A preparation process of asphalt concrete comprises the following steps:
(1) heating 3-7 parts by weight of asphalt at the temperature of 160-180 ℃ until the asphalt is completely melted, adding SBS accounting for 2-7% of the weight of the asphalt, sulfur accounting for 0.1-0.5% of the weight of the asphalt and surfactant accounting for 0.1-0.5% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 160-;
(2) 95 to 105 weight portions of basalt aggregate, 1 to 3 weight portions of mineral powder, 0.5 to 1.5 weight portions of kaolin and 0.4 to 0.9 weight portion of coupling agent are stirred for 5 to 15 minutes at the temperature of 160-180 ℃ at the rotating speed of 200-500 rpm, and then SBS modified asphalt is added to be continuously stirred for 5 to 15 minutes at the rotating speed of 200-500 rpm.
As an improved technical scheme, the preparation process of the asphalt concrete comprises the following steps:
(1) heating 3-7 parts by weight of asphalt at the temperature of 160-180 ℃ until the asphalt is completely melted, adding SBS accounting for 2-7% of the weight of the asphalt, sulfur accounting for 0.1-0.5% of the weight of the asphalt and surfactant accounting for 0.1-0.5% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 160-;
(2) 95 to 105 weight portions of basalt aggregate, 1 to 3 weight portions of mineral powder, 0.5 to 1.5 weight portions of kaolin and 0.4 to 0.9 weight portion of modified coupling agent are stirred for 5 to 15 minutes at the temperature of 160-180 ℃ at the rotating speed of 200-500 rpm, and then SBS modified asphalt is added to be continuously stirred for 5 to 15 minutes at the rotating speed of 200-500 rpm.
The coupling agent is 3-isocyanate propyl trimethoxy silane.
The modified coupling agent is modified 3-isocyanate propyl trimethoxy silane, and the preparation method of the modified 3-isocyanate propyl trimethoxy silane comprises the following steps: 3-isocyanate propyl trimethoxy silane, p-hydroxyanisole and dibutyltin dilaurate in a mass ratio of (98-102): (0.03-0.17): (0.003-0.004) mixing, stirring for 20-40 minutes at the rotation speed of 200-500 rpm at the temperature of 50-60 ℃; then adding 3-hydroxypropyl acrylate accounting for 35-45 percent of the weight of the 3-isocyanate propyl trimethoxy silane, and stirring for 1-3 hours at the temperature of 70-80 ℃ at the rotating speed of 200-500 rpm.
The particle size of the basalt aggregate is 2-8 mm.
The mineral powder is limestone powder with the particle size of 0.02-0.07 mm.
The particle size of the kaolin is 1500-.
The surfactant is alkylated sodium lignosulfonate and/or sodium diisopropyl naphthalene sulfonate. In a preferred embodiment of the invention, the surfactant consists of 60-70wt% of sodium alkylated lignosulfonate and 30-40wt% of sodium diisopropylnaphthalenesulfonate.
The alkylated sodium lignosulfonates can be referred to patents: prepared by the method shown in example 3 of application No. 201510488396.3.
An asphalt concrete is prepared by the preparation process.
The technical effects are as follows:
the asphalt concrete has good high-temperature and low-temperature performances, has excellent anti-fatigue, anti-aging and waterproof effects, and can obviously improve the anti-crack and anti-rutting capabilities, thereby improving the comprehensive performance of the pavement and the durability; the viscosity under high-temperature mixing can be reduced, and the pollution of asphalt smoke can be greatly reduced; the performance index of the asphalt mixture is not weakened; saving mixing energy consumption, simple and convenient construction, environmental protection and energy saving.
Detailed Description
Sodium diisopropyl naphthalene sulfonate in the examples, CAS No.: 1322-93-6.
Sulfur in examples, CAS No.: 7704-34-9.
In the embodiment, the basalt aggregate is basalt crushed stone with the particle size of 6mm, and is provided by a Sendi mineral product processing factory in Lingshu county.
In the examples, the mineral powder is limestone powder with a particle size of 0.05mm, and is provided by Waoyang mineral product processing factory in Lingshou county.
Examples p-hydroxyanisole, CAS No.: 150-76-5.
Example 3-isocyanatopropyltrimethoxysilane, CAS No.: 15396-00-6.
Examples dibutyltin dilaurate, CAS No.: 77-58-7.
Example 3-hydroxypropyl acrylate, CAS No.: 2761-08-2.
In the embodiment, the asphalt is special road asphalt with the model number of 10 provided by Qufu Fumao chemical Co.
In the embodiment, the SBS is SBS 1301-1 which is produced by the Bailingpetrochemical division of China petrochemical group asset management Limited and has the trade mark YH-791H.
In the examples, the kaolin is 2000 mesh calcined kaolin provided by Shanghai Liangjiang titanium white chemical products Co.
Examples alkylated sodium lignosulfonates are described in patents: prepared by the method shown in example 3 of application No. 201510488396.3.
Example 1
The preparation process of the asphalt concrete comprises the following steps:
(1) heating 5 parts by weight of asphalt at 165 ℃ to be completely melted to obtain molten asphalt;
(2) 100 parts by weight of basalt aggregate, 1.5 parts by weight of mineral powder, 1 part by weight of kaolin and 0.75 part by weight of coupling agent are stirred for 10 minutes at the temperature of 165 ℃ at the rotating speed of 300 revolutions per minute, and then molten asphalt is added and continuously stirred for 10 minutes at the rotating speed of 300 revolutions per minute, so that the asphalt concrete is obtained.
The coupling agent is 3-isocyanate propyl trimethoxy silane.
Example 2
The preparation process of the asphalt concrete comprises the following steps:
(1) heating 5 parts by weight of asphalt at 165 ℃ until the asphalt is completely melted, adding SBS accounting for 4% of the weight of the asphalt, sulfur accounting for 0.2% of the weight of the asphalt and alkylated sodium lignosulfonate accounting for 0.3% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 165 ℃, shearing for 30 minutes at the shearing revolution of 4000 rpm to obtain SBS modified asphalt;
(2) 100 parts by weight of basalt aggregate, 1.5 parts by weight of mineral powder, 1 part by weight of kaolin and 0.75 part by weight of coupling agent are stirred for 10 minutes at the temperature of 165 ℃ at the rotating speed of 300 revolutions per minute, and then SBS modified asphalt is added and continuously stirred for 10 minutes at the rotating speed of 300 revolutions per minute, so that the asphalt concrete is obtained.
The coupling agent is 3-isocyanate propyl trimethoxy silane.
Example 3
The preparation process of the asphalt concrete comprises the following steps:
(1) heating 5 parts by weight of asphalt at 165 ℃ until the asphalt is completely melted, adding SBS accounting for 4% of the weight of the asphalt, sulfur accounting for 0.2% of the weight of the asphalt and alkylated sodium lignosulfonate accounting for 0.3% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 165 ℃, shearing for 30 minutes at the shearing revolution of 4000 rpm to obtain SBS modified asphalt;
(2) 100 parts by weight of basalt aggregate, 1.5 parts by weight of mineral powder, 1 part by weight of kaolin and 0.75 part by weight of modified coupling agent are stirred for 10 minutes at the temperature of 165 ℃ at the rotating speed of 300 revolutions per minute, and then SBS modified asphalt is added and continuously stirred for 10 minutes at the rotating speed of 300 revolutions per minute, so that the asphalt concrete is obtained.
The modified coupling agent is modified 3-isocyanate propyl trimethoxy silane, and the preparation method of the modified 3-isocyanate propyl trimethoxy silane comprises the following steps: 3-isocyanatopropyl trimethoxy silane, p-hydroxyanisole and dibutyltin dilaurate in a mass ratio of 100: 0.1: 0.0035 and stirred at the rotating speed of 300 revolutions per minute for 30 minutes at the temperature of 55 ℃; then adding 3-hydroxypropyl acrylate accounting for 40 percent of the weight of the 3-isocyanate propyl trimethoxy silane, and stirring for 2 hours at the temperature of 75 ℃ at the rotating speed of 300 r/min to obtain the modified 3-isocyanate propyl trimethoxy silane.
Comparative example 1
The preparation process of the asphalt concrete comprises the following steps:
(1) heating 5 parts by weight of asphalt at 165 ℃ until the asphalt is completely melted, adding SBS accounting for 4% of the weight of the asphalt, sulfur accounting for 0.2% of the weight of the asphalt and sodium lignosulfonate accounting for 0.3% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 165 ℃, shearing for 30 minutes at the shearing revolution of 4000 rpm to obtain SBS modified asphalt;
(2) 100 parts by weight of basalt aggregate, 1.5 parts by weight of mineral powder, 1 part by weight of kaolin and 0.75 part by weight of modified coupling agent are stirred for 10 minutes at the temperature of 165 ℃ at the rotating speed of 300 revolutions per minute, and then SBS modified asphalt is added and continuously stirred for 10 minutes at the rotating speed of 300 revolutions per minute, so that the asphalt concrete is obtained.
The modified coupling agent is modified 3-isocyanate propyl trimethoxy silane, and the preparation method of the modified 3-isocyanate propyl trimethoxy silane comprises the following steps: 3-isocyanatopropyl trimethoxy silane, p-hydroxyanisole and dibutyltin dilaurate in a mass ratio of 100: 0.1: 0.0035 and stirred at the rotating speed of 300 revolutions per minute for 30 minutes at the temperature of 55 ℃; then adding 3-hydroxypropyl acrylate accounting for 40 percent of the weight of the 3-isocyanate propyl trimethoxy silane, and stirring for 2 hours at the temperature of 75 ℃ at the rotating speed of 300 r/min to obtain the modified 3-isocyanate propyl trimethoxy silane.
Example 4
The preparation process of the asphalt concrete comprises the following steps:
(1) heating 5 parts by weight of asphalt at 165 ℃ to be completely molten, adding SBS accounting for 4% of the weight of the asphalt, sulfur accounting for 0.2% of the weight of the asphalt and sodium diisopropyl naphthalene sulfonate accounting for 0.3% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 165 ℃, shearing for 30 minutes at the shearing revolution of 4000 rpm to obtain SBS modified asphalt;
(2) 100 parts by weight of basalt aggregate, 1.5 parts by weight of mineral powder, 1 part by weight of kaolin and 0.75 part by weight of modified coupling agent are stirred for 10 minutes at the temperature of 165 ℃ at the rotating speed of 300 revolutions per minute, and then SBS modified asphalt is added and continuously stirred for 10 minutes at the rotating speed of 300 revolutions per minute, so that the asphalt concrete is obtained.
The modified coupling agent is modified 3-isocyanate propyl trimethoxy silane, and the preparation method of the modified 3-isocyanate propyl trimethoxy silane comprises the following steps: 3-isocyanatopropyl trimethoxy silane, p-hydroxyanisole and dibutyltin dilaurate in a mass ratio of 100: 0.1: 0.0035 and stirred at the rotating speed of 300 revolutions per minute for 30 minutes at the temperature of 55 ℃; then adding 3-hydroxypropyl acrylate accounting for 40 percent of the weight of the 3-isocyanate propyl trimethoxy silane, and stirring for 2 hours at the temperature of 75 ℃ at the rotating speed of 300 r/min to obtain the modified 3-isocyanate propyl trimethoxy silane.
Example 5
The preparation process of the asphalt concrete comprises the following steps:
(1) heating 5 parts by weight of asphalt at 165 ℃ to be completely molten, adding SBS accounting for 4% of the weight of the asphalt, sulfur accounting for 0.2% of the weight of the asphalt, alkylated sodium lignosulfonate accounting for 0.195% of the weight of the asphalt and sodium diisopropyl naphthalene sulfonate accounting for 0.105% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 165 ℃, shearing for 30 minutes at the shearing revolution of 4000 rpm to obtain SBS modified asphalt;
(2) 100 parts by weight of basalt aggregate, 1.5 parts by weight of mineral powder, 1 part by weight of kaolin and 0.75 part by weight of modified coupling agent are stirred for 10 minutes at the temperature of 165 ℃ at the rotating speed of 300 revolutions per minute, and then SBS modified asphalt is added and continuously stirred for 10 minutes at the rotating speed of 300 revolutions per minute, so that the asphalt concrete is obtained. Testing road performance and conductivity of the asphalt concrete, and performing a basic performance test according to the test specification of road engineering asphalt and asphalt mixture (JTJE 20-2011); a standard rut plate test piece is formed according to technical Specification for construction of asphalt road surfaces of highways (JTGF 40-2004). Spreading the asphalt concrete by using a spreading machine with the dosage of 12kg/m2Compacting the paved asphalt mixture by a road roller, and testing the anti-skid value (BPN) at 20 ℃ by referring to T0964-2008 & lttest method for determining road surface friction coefficient by pendulum instrument20). The test results are: the fatigue life is 12584 times, the freeze-thaw splitting residue mild ratio is 92.7 percent, and the BPN is20Is 42.
The modified coupling agent is modified 3-isocyanate propyl trimethoxy silane, and the preparation method of the modified 3-isocyanate propyl trimethoxy silane comprises the following steps: 3-isocyanatopropyl trimethoxy silane, p-hydroxyanisole and dibutyltin dilaurate in a mass ratio of 100: 0.1: 0.0035 and stirred at the rotating speed of 300 revolutions per minute for 30 minutes at the temperature of 55 ℃; then adding 3-hydroxypropyl acrylate accounting for 40 percent of the weight of the 3-isocyanate propyl trimethoxy silane, and stirring for 2 hours at the temperature of 75 ℃ at the rotating speed of 300 r/min to obtain the modified 3-isocyanate propyl trimethoxy silane.
Test example 1
The asphalt concretes of the examples 1 to 4 and the comparative example 1 are subjected to road performance and conductivity tests, and basic performance tests are carried out according to the test regulations of road engineering asphalt and asphalt mixture (JTJE 20-2011); a standard rut plate test piece is formed according to technical Specification for construction of asphalt road surfaces of highways (JTGF 40-2004). The asphalt concretes of examples 1 to 4 and comparative example 1 were spread with a spreading machine in an amount of 12kg/m2Compacting the paved asphalt mixture by a road roller, and testing the anti-skid value (BPN) at 20 ℃ by referring to T0964-2008 & lttest method for determining road surface friction coefficient by pendulum instrument20). The specific test results are shown in table 1.
Table 1: test result table
Compared with the original asphalt, the asphalt concrete preparation process has the advantages that the high-temperature viscosity is increased and the softening point is increased by modifying the asphalt; the asphalt concrete has good high-temperature and low-temperature performances, has excellent anti-fatigue, anti-aging and waterproof effects, and can obviously improve the anti-crack and anti-rutting capabilities, thereby improving the comprehensive performance of the pavement and improving the durability.
Claims (6)
1. The preparation process of the asphalt concrete is characterized by comprising the following steps of:
(1) heating 3-7 parts by weight of asphalt at the temperature of 160-180 ℃ until the asphalt is completely melted, adding SBS accounting for 2-7% of the weight of the asphalt, sulfur accounting for 0.1-0.5% of the weight of the asphalt and surfactant accounting for 0.1-0.5% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 160-;
(2) stirring 95-105 parts by weight of basalt aggregate, 1-3 parts by weight of mineral powder, 0.5-1.5 parts by weight of kaolin and 0.4-0.9 part by weight of modified coupling agent at the temperature of 160-180 ℃ at the rotating speed of 200-500 rpm for 5-15 minutes, and then adding SBS modified asphalt and continuing stirring at the rotating speed of 200-500 rpm for 5-15 minutes to obtain the modified asphalt;
the surfactant consists of 60-70wt% of alkylated sodium lignosulfonate and 30-40wt% of sodium diisopropyl naphthalene sulfonate;
the modified coupling agent is modified 3-isocyanate propyl trimethoxy silane, and the preparation method of the modified 3-isocyanate propyl trimethoxy silane comprises the following steps: 3-isocyanate propyl trimethoxy silane, p-hydroxyanisole and dibutyltin dilaurate in a mass ratio of (98-102): (0.03-0.17): (0.003-0.004) mixing, stirring for 20-40 minutes at the rotation speed of 200-500 rpm at the temperature of 50-60 ℃; then adding 3-hydroxypropyl acrylate accounting for 35-45 percent of the weight of the 3-isocyanate propyl trimethoxy silane, and stirring for 1-3 hours at the temperature of 70-80 ℃ at the rotating speed of 200-500 rpm.
2. A process for the preparation of asphalt concrete according to claim 1, wherein the particle size of said basalt aggregate is 2-8 mm.
3. The process for preparing asphalt concrete according to claim 1, wherein the ore powder is limestone powder with a particle size of 0.02-0.07 mm.
4. The process for preparing asphalt concrete according to claim 1, wherein the kaolin has a particle size of 1500-2500 mesh.
5. The preparation process of the asphalt concrete is characterized by comprising the following steps of:
(1) heating 5 parts by weight of asphalt at 165 ℃ to be completely molten, adding SBS accounting for 4% of the weight of the asphalt, sulfur accounting for 0.2% of the weight of the asphalt, alkylated sodium lignosulfonate accounting for 0.195% of the weight of the asphalt and sodium diisopropyl naphthalene sulfonate accounting for 0.105% of the weight of the asphalt, and uniformly mixing to obtain a mixture; keeping the temperature of the mixture in a high-speed shearing machine at 165 ℃, shearing for 30 minutes at the shearing revolution of 4000 rpm to obtain SBS modified asphalt;
(2) stirring 100 parts by weight of basalt aggregate, 1.5 parts by weight of mineral powder, 1 part by weight of kaolin and 0.75 part by weight of modified coupling agent at 165 ℃ for 10 minutes at the rotating speed of 300 revolutions per minute, adding SBS modified asphalt, and continuously stirring for 10 minutes at the rotating speed of 300 revolutions per minute to obtain asphalt concrete;
the modified coupling agent is modified 3-isocyanate propyl trimethoxy silane, and the preparation method of the modified 3-isocyanate propyl trimethoxy silane comprises the following steps: 3-isocyanatopropyl trimethoxy silane, p-hydroxyanisole and dibutyltin dilaurate in a mass ratio of 100: 0.1: 0.0035 and stirred at the rotating speed of 300 revolutions per minute for 30 minutes at the temperature of 55 ℃; then adding 3-hydroxypropyl acrylate accounting for 40 percent of the weight of the 3-isocyanate propyl trimethoxy silane, and stirring for 2 hours at the temperature of 75 ℃ at the rotating speed of 300 r/min to obtain the modified 3-isocyanate propyl trimethoxy silane.
6. An asphalt concrete prepared by the preparation process of any one of claims 1 to 5.
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| CN108191301A (en) * | 2018-03-20 | 2018-06-22 | 和县祥龙沥青混凝土有限公司 | A kind of anti-chap bituminous concrete and its preparation process |
| CN108947332A (en) * | 2018-08-10 | 2018-12-07 | 桂林理工大学 | A kind of preparation method of high-performance kaolin modified asphalt mixture |
| CN109503030A (en) * | 2018-12-24 | 2019-03-22 | 上海浦兴路桥建设工程有限公司 | A kind of asphalt preparation method of achievable warm mix |
| CN110937851B (en) * | 2019-12-18 | 2021-04-02 | 武汉理工大学 | Preparation method of modified asphalt based on surface energy theory |
| CN113773000B (en) * | 2021-09-24 | 2022-04-19 | 浙江弼土新材料有限公司 | Modified recycled asphalt mixture and processing technology thereof |
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