CN112812577A - Anti-aging environment-friendly modified asphalt material and preparation method thereof - Google Patents
Anti-aging environment-friendly modified asphalt material and preparation method thereof Download PDFInfo
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Abstract
The modified asphalt material is mainly composed of the following components in parts by mass: 60-70 parts of matrix asphalt, 15-20 parts of colloidal particles, 5-10 parts of coarse aggregate, 5-10 parts of fine aggregate, 3-6 parts of mineral powder, 3-5 parts of polymer fiber, 1-3 parts of antioxidant, 1-3 parts of anti-ultraviolet light agent, 0.3-0.5 part of cross-linking agent and 0.1-0.3 part of deodorant. The anti-aging environment-friendly modified asphalt material and the preparation method thereof have the advantages that the formula is reasonable, the preparation process is simple, the prepared modified asphalt material has excellent anti-aging performance and mechanical performance, the large-scale production is easy, the compatibility of all components in the formula is good, the good synergistic effect is achieved, the problem of solid waste pollution caused by waste tires is solved by the rubber powder particles prepared by treating the waste tires, the waste recycling is facilitated, the environment-friendly effect is better, the economy is higher, and the application prospect is wide.
Description
Technical Field
The invention belongs to the technical field of asphalt materials, and particularly relates to an anti-aging environment-friendly modified asphalt material and a preparation method thereof.
Background
With the continuous development of road construction in the world, asphalt becomes one of the most widely used road pavement materials in the world, and the advantages thereof are as follows: the asphalt pavement has better flatness, and the automobile runs stably and comfortably on the pavement; the asphalt pavement has certain plasticity and viscoelasticity, can bear enough vehicle load and also has good relaxation performance; the asphalt pavement and the automobile tire have better adhesive force; the asphalt pavement has higher damping and noise reduction effects; the asphalt pavement can be recycled.
In recent years, the road construction of China is rapidly developed and is already a world highway kingdom, and the highway of China is famous in the world and is in continuous improvement on the road construction requirement and higher on the asphalt performance along with the rapid development of the country. Due to the composition and structure of asphalt, the asphalt has poor temperature sensitivity, so that the asphalt pavement is easy to soften at high temperature and harden and crack at low temperature. Asphalt is a high polymer material, the anti-aging effect is not ideal, when the asphalt is stored and constructed, the asphalt is subjected to thermal oxidation aging under the combined action of high temperature and oxygen, and after the road surface is communicated with a vehicle, the asphalt is also subjected to ultraviolet light aging of different degrees and simultaneously is accompanied with slow oxidation reaction.
In addition, in recent years, due to the increasing automobile holding capacity, the problem of solid waste pollution caused by waste tires is becoming more severe, and the effective treatment of waste tires has become an urgent and important environmental protection task. Therefore, it is needed to develop an anti-aging and environment-friendly modified asphalt material and a preparation method thereof, which not only improve the anti-aging performance of the asphalt material, but also can recycle the waste tires, solve the problem of solid waste pollution caused by the waste tires, and are green and environment-friendly.
Chinese patent application No. CN201310367629.5 discloses a rubber powder epoxy resin asphalt material and a preparation method and a use method thereof, wherein the rubber powder material is adopted, so that the unit price of the epoxy resin asphalt material can be reduced, the low-temperature flexibility of the epoxy resin asphalt material can be improved, the ageing resistance of the asphalt material is not improved, and the problem of solid waste pollution caused by waste tires is solved.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide the anti-aging environment-friendly modified asphalt material and the preparation method thereof, the formula is reasonable in arrangement, the preparation process is simple, the prepared modified asphalt material has excellent anti-aging performance and mechanical performance, the large-scale production is easy, the compatibility of all components in the formula is good, the good synergistic effect is achieved, the problem of solid waste pollution caused by waste tires is solved by processing the waste tires to prepare the rubber powder particles, the waste recycling is facilitated, the environment is protected, the economy is realized, and the application prospect is wide.
The purpose of the invention is realized by the following technical scheme:
the anti-aging environment-friendly modified asphalt material mainly comprises the following components in parts by weight: 60-70 parts of matrix asphalt, 15-20 parts of colloidal particles, 5-10 parts of coarse aggregate, 5-10 parts of fine aggregate, 3-6 parts of mineral powder, 3-5 parts of polymer fiber, 1-3 parts of antioxidant, 1-3 parts of anti-ultraviolet light agent, 0.3-0.5 part of cross-linking agent and 0.1-0.3 part of deodorant.
Further, in the anti-aging environment-friendly modified asphalt material, the coarse aggregate is basalt; the fine aggregate is stone chips; the polymer fiber is one or a mixture of polypropylene fiber, polyvinyl alcohol fiber and polyacrylonitrile fiber; the antioxidant is one or a mixture of Irganox 1010, Irgafos 168 and HP-136.
Further, the anti-aging environment-friendly modified asphalt material is prepared by mixing one or more of UV531, UV326, UV-770 and UV-9 as an anti-ultraviolet agent; the cross-linking agent is one or a mixture of methyl orthosilicate, aluminum isopropoxide and titanium acetylacetonate; the smell removing agent is a powder smell removing agent.
Further, the average particle size of the rubber powder particles is 0.4-1.0 mm; the average grain diameter of the basalt is 3-5 mm; the average particle size of the stone chips is 1-3 mm; the average grain diameter of the mineral powder is 0.15-0.30 mm.
The anti-aging environment-friendly modified asphalt material has the advantages of reasonable formula design, good compatibility of components, good synergistic effect, excellent anti-aging performance and mechanical performance, solves the problem of solid waste pollution caused by waste tires by using rubber powder particles prepared by processing the waste tires, is beneficial to recycling of waste, and has the advantages of environmental protection, economy and wide application prospect.
After the rubber powder particles are added into the matrix asphalt, the high molecular polymer contained in the rubber powder particles can generate oxidation-reduction reaction with saturated components and aromatic components in the asphalt, so that the size of the rubber powder particles is increased, a granular and filamentous mixture is finally formed, the asphalt material has better viscoelasticity, is more viscous under a high-temperature condition, has better high-temperature stability and strong elastic recovery capability, the high-temperature anti-rutting capability in practical engineering application is obviously improved, the low-temperature performance is obviously improved compared with the matrix asphalt, and the porous structure of the rubber powder particles can also enable the pavement to achieve the noise reduction effect; the coarse aggregate and the fine aggregate are compounded as the filler, which is beneficial to enhancing the mechanical strength of the asphalt material; the addition of the mineral powder can obviously improve the adhesiveness and the water resistance of the matrix asphalt, the colloidal particles, the coarse aggregates and the fine aggregates.
Through the compound modification of the anti-ultraviolet agent and the antioxidant, the synergistic effect is good, the photo-oxidative aging and the thermo-oxidative aging of the asphalt material can be improved simultaneously, and the asphalt material has more excellent anti-aging performance; the polymer fiber is soft in texture and good in compatibility with each component in the modified asphalt material, so that the insufficient compatibility caused by inconsistent density of the rubber powder particles and the matrix asphalt is relieved, the complete swelling and development of the rubber powder particles in the matrix asphalt is facilitated, the crack resistance and the shear resistance of the modified asphalt material can be effectively improved, and the mechanical property of the asphalt material is further improved; the cross-linking agent can convert linear or slightly branched macromolecules in the asphalt material into a three-dimensional network structure, so that the bonding strength, heat resistance, wear resistance, solvent resistance and other properties of the components of the asphalt material are improved; due to the addition of the rubber powder particles, the rubber powder particles can be degraded and desulfurized under the high-temperature condition, a large amount of harmful gas is released, the environmental pollution is caused, the modification effect is reduced, the deodorant can obviously reduce the concentration of H2S gas generated by the degradation and desulfurization of the rubber powder particles, and the inhibiting effect is achieved.
The invention also relates to a preparation method of the anti-aging environment-friendly modified asphalt material, which comprises the following steps:
(1) preparing matrix asphalt, colloidal particles, coarse aggregates, fine aggregates, mineral powder, polymer fibers, an antioxidant, an anti-ultraviolet agent, a cross-linking agent and a deodorant according to the formula;
(2) drying the rubber powder particles, simultaneously heating the matrix asphalt, adding polymer fibers into the matrix asphalt in the heating process, and shearing for 20-30min at the rotating speed of 500-800r/min by using a high-speed shearing machine to obtain an asphalt fiber base material;
(3) stirring the rubber powder particles and the asphalt fiber base material at the stirring temperature of 190-210 ℃, the stirring frequency of 700r/min, the stirring time of 0.8-1.0 h, and performing desulfurization reaction on the rubber powder particles and the asphalt fiber base material to obtain a rubber modified asphalt base material;
(4) uniformly mixing the coarse aggregate, the fine aggregate and the mineral powder to obtain mixed powder;
(5) keeping the temperature of the rubber modified asphalt base material at 170-180 ℃, adding the mixed powder, shearing and stirring for 3-5min by a high-speed shearing machine, then adding the antioxidant, the anti-ultraviolet agent, the cross-linking agent and the deodorant, and shearing and stirring for 30-50min by the high-speed shearing machine to obtain the modified asphalt material.
Further, in the preparation method of the anti-aging environment-friendly modified asphalt material, the drying temperature of the rubber powder particles in the step (2) is 110-120 ℃; the heating temperature of the matrix asphalt is 170-180 ℃.
Further, in the preparation method of the anti-aging environment-friendly modified asphalt material, the rotating speed of the high-speed shearing machine after the mixed powder is added in the step (5) is 300-500 r/min; after the antioxidant, the anti-ultraviolet light agent, the cross-linking agent and the deodorant are added, the rotating speed of the high-speed shearing machine is 5000-.
Compared with the prior art, the invention has the following beneficial effects:
(1) the anti-aging environment-friendly modified asphalt material disclosed by the invention is reasonable in formula design, good in compatibility of each component, good in synergistic effect, excellent in anti-aging performance and mechanical performance, and capable of solving the problem of solid waste pollution caused by waste tires by processing the waste tires to prepare rubber powder particles, thereby being beneficial to recycling of wastes and being more environment-friendly and economical;
(2) according to the anti-aging environment-friendly modified asphalt material disclosed by the invention, the rubber powder particles are added into the matrix asphalt, so that the asphalt material has better viscoelasticity, is more viscous under a high-temperature condition, has better high-temperature stability and strong elastic recovery capability, the high-temperature anti-rutting capability of the asphalt material in practical engineering application is obviously improved, the low-temperature performance is also obviously improved compared with that of the matrix asphalt, and the porous structure of the rubber powder particles can also enable a road surface to achieve the noise reduction effect; the polymer fiber is soft in texture and good in compatibility with each component in the modified asphalt material, so that the insufficient compatibility caused by inconsistent density of the rubber powder particles and the matrix asphalt is relieved, the complete swelling and development of the rubber powder particles in the matrix asphalt is facilitated, the crack resistance and the shear resistance of the modified asphalt material can be effectively improved, and the mechanical property of the asphalt material is further improved; the deodorant can obviously reduce the concentration of H2S gas generated by degrading and desulfurizing rubber powder particles, and has an inhibiting effect;
(3) according to the anti-aging environment-friendly modified asphalt material disclosed by the invention, the coarse aggregate and the fine aggregate are compounded as the filler, so that the mechanical strength of the asphalt material is favorably enhanced; the addition of the mineral powder can obviously improve the adhesiveness and the water resistance of matrix asphalt, colloidal particles, coarse aggregates and fine aggregates;
(4) the anti-aging environment-friendly modified asphalt material disclosed by the invention is subjected to composite modification by the anti-ultraviolet agent and the antioxidant, has a good synergistic effect, can be used for simultaneously improving the photo-oxidative aging and the thermo-oxidative aging of the asphalt material, and has more excellent anti-aging performance;
(5) the preparation method of the anti-aging environment-friendly modified asphalt material disclosed by the invention has the advantages of reasonable arrangement of preparation steps, simplicity, controllability, high flexibility, suitability for large-scale production, good economy and wide application prospect.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention are clearly and completely described in the embodiments with reference to specific experimental data, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all 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.
The following embodiment provides an anti-aging environment-friendly modified asphalt material and a preparation method thereof, wherein the modified asphalt material mainly comprises the following components in parts by mass: 60-70 parts of matrix asphalt, 15-20 parts of colloidal particles, 5-10 parts of coarse aggregate, 5-10 parts of fine aggregate, 3-6 parts of mineral powder, 3-5 parts of polymer fiber, 1-3 parts of antioxidant, 1-3 parts of anti-ultraviolet light agent, 0.3-0.5 part of cross-linking agent and 0.1-0.3 part of deodorant.
Further, the coarse aggregate is basalt; the fine aggregate is stone chips; the polymer fiber is one or a mixture of polypropylene fiber, polyvinyl alcohol fiber and polyacrylonitrile fiber; the antioxidant is one or a mixture of Irganox 1010, Irgafos 168 and HP-136.
Further, the anti-ultraviolet agent is one or a mixture of UV531, UV326, UV-770 and UV-9; the cross-linking agent is one or a mixture of methyl orthosilicate, aluminum isopropoxide and titanium acetylacetonate; the smell removing agent is a powder smell removing agent.
Further, the average grain diameter of the colloidal powder particles is 0.4-1.0 mm; the average grain diameter of the basalt is 3-5 mm; the average particle size of the stone chips is 1-3 mm; the average grain diameter of the mineral powder is 0.15-0.30 mm.
Wherein, the matrix asphalt adopts 70# asphalt.
Example 1
The preparation method of the anti-aging environment-friendly modified asphalt material comprises the following steps:
(1) the modified asphalt material mainly comprises the following components in parts by weight: 65 parts of matrix asphalt, 16 parts of colloidal particles, 8 parts of basalt, 10 parts of stone chips, 4 parts of mineral powder, 3 parts of a mixture of polypropylene fibers and polyvinyl alcohol fibers, Irganox 10103 parts, UV 5312 parts, 0.5 part of a mixture of methyl orthosilicate and aluminum isopropoxide and 0.1 part of powder deodorant; preparing materials according to the formula;
(2) drying the rubber powder particles at the drying temperature of 110 ℃; simultaneously heating the matrix asphalt, adding mixture fiber of polypropylene fiber and polyvinyl alcohol fiber into the matrix asphalt during heating, and shearing for 30min at a rotating speed of 600r/min by using a high-speed shearing machine to obtain an asphalt fiber base material, wherein the heating temperature is 180 ℃;
(3) stirring the rubber powder particles and the asphalt fiber base material at the stirring temperature of 200 ℃, the stirring frequency of 700r/min, and the stirring time of 1.0 hour, so that the rubber powder and the asphalt fiber base material complete desulfurization reaction to obtain a rubber modified asphalt base material;
(4) uniformly mixing basalt, stone chips and mineral powder to obtain mixed powder;
(5) keeping the temperature of the rubber modified asphalt base material at 180 ℃, adding the mixed powder, and shearing and stirring for 5min by using a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 500 r/min; and adding Irganox 1010, UV531, a mixture of methyl orthosilicate and aluminum isopropoxide and a powder deodorant, and shearing and stirring for 30min by a high-speed shearing machine at the rotating speed of 6000r/min to obtain the modified asphalt material.
Example 2
(1) The modified asphalt material mainly comprises the following components in parts by weight: 62 parts of matrix asphalt, 15 parts of rubber powder particles, 10 parts of basalt, 8 parts of stone chips, 6 parts of mineral powder, 5 parts of a mixture of polypropylene fiber, polyvinyl alcohol fiber and polyacrylonitrile fiber, 1 part of a mixture of Irganox 10102, UV531 and UV326, 0.5 part of methyl orthosilicate and 0.2 part of powder deodorant; preparing materials according to the formula;
(2) drying the rubber powder particles at 115 ℃; simultaneously heating the matrix asphalt, adding a mixture of polypropylene fibers, polyvinyl alcohol fibers and polyacrylonitrile fibers into the matrix asphalt in the heating process, and shearing the mixture for 25min at a rotating speed of 700r/min by using a high-speed shearing machine to obtain an asphalt fiber base material, wherein the heating temperature is 180 ℃;
(3) stirring the rubber powder particles and the asphalt fiber base material at the temperature of 190 ℃, the stirring frequency of 700r/min for 0.8 hour, and completing the desulfurization reaction of the rubber powder and the asphalt fiber base material to obtain a rubber modified asphalt base material;
(4) uniformly mixing basalt, stone chips and mineral powder to obtain mixed powder;
(5) keeping the temperature of the rubber modified asphalt base material at 180 ℃, adding the mixed powder, and shearing and stirring for 3min by using a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 300-; and then adding a mixture of Irganox 1010, UV531 and UV326, methyl orthosilicate and a powder deodorant, and shearing and stirring for 40min in a high-speed shearing machine at the rotating speed of 6000r/min to obtain the modified asphalt material.
Example 3
(1) The modified asphalt material mainly comprises the following components in parts by weight: 66 parts of matrix asphalt, 16 parts of colloidal particles, 5 parts of basalt, 8 parts of stone chips, 5 parts of mineral powder, 4 parts of a mixture of polyvinyl alcohol fibers and polyacrylonitrile fibers, 1683 parts of Irgafos, 2 parts of a mixture of UV-770 and UV-9, 0.5 part of a mixture of cross-linking agent methyl orthosilicate and aluminum isopropoxide and 0.1 part of powder deodorant; preparing materials according to the formula;
(2) drying the rubber powder particles at the drying temperature of 120 ℃; simultaneously heating the matrix asphalt, adding a mixture of polyvinyl alcohol fibers and polyacrylonitrile fibers into the matrix asphalt in the heating process, and shearing for 30min at a rotating speed of 600r/min by using a high-speed shearing machine to obtain an asphalt fiber base material, wherein the heating temperature is 180 ℃;
(3) stirring the rubber powder particles and the asphalt fiber base material at the stirring temperature of 200 ℃, the stirring frequency of 700r/min, and the stirring time of 1.0 hour, so that the rubber powder and the asphalt fiber base material complete desulfurization reaction to obtain a rubber modified asphalt base material;
(4) uniformly mixing the coarse aggregate, the fine aggregate and the mineral powder to obtain mixed powder;
(5) keeping the temperature of the rubber modified asphalt base material at 175 ℃, adding the mixed powder, and shearing and stirring for 4min by using a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 400 r/min; and then adding Irgafos 168, UV-770, a mixture of UV-9, a mixture of methyl orthosilicate and aluminum isopropoxide, and a powder deodorant, shearing and stirring for 35min in a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 5500r/min, and thus obtaining the modified asphalt material.
Example 4
(1) The modified asphalt material mainly comprises the following components in parts by weight: 62 parts of matrix asphalt, 18 parts of rubber powder particles, 8 parts of basalt, 6 parts of stone chips, 4 parts of mineral powder, 5 parts of a mixture of polypropylene fibers, polyvinyl alcohol fibers and polyacrylonitrile fibers, 3 parts of a mixture of Irgafos 168 and HP-136, 2 parts of a mixture of UV531, UV-770 and UV-9, 0.4 part of a mixture of aluminum isopropoxide and titanium acetylacetonate and 0.1 part of a powder deodorant; preparing materials according to the formula;
(2) drying the rubber powder particles at 115 ℃; simultaneously heating the matrix asphalt, adding polymer fibers into the matrix asphalt in the heating process, and shearing for 20min at a rotating speed of 750r/min by using a high-speed shearing machine to obtain an asphalt fiber base material, wherein the heating temperature is 175 ℃;
(3) stirring the rubber powder particles and the asphalt fiber base material at the stirring temperature of 205 ℃, the stirring frequency of 700r/min and the stirring time of 0.9 hour, and completing the desulfurization reaction of the rubber powder and the asphalt fiber base material to obtain a rubber modified asphalt base material;
(4) uniformly mixing basalt, stone chips and mineral powder to obtain mixed powder;
(5) keeping the temperature of the rubber modified asphalt base material at 180 ℃, adding the mixed powder, and shearing and stirring for 3min by using a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 450 r/min; and then adding a mixture of Irgafos 168 and HP-136, a mixture of UV531, UV-770 and UV-9, a mixture of aluminum isopropoxide and titanium acetylacetonate, and a powder deodorant, and shearing and stirring for 35min by a high-speed shearing machine at a rotating speed of 5500r/min to obtain the modified asphalt material.
Example 5
(1) The modified asphalt material mainly comprises the following components in parts by weight: 67 parts of matrix asphalt, 15 parts of rubber powder particles, 5 parts of basalt, 8 parts of stone chips, 3 parts of mineral powder, 3-5 parts of a mixture of polypropylene fibers and polyvinyl alcohol fibers, 2 parts of a mixture of Irgafos 1683 parts, UV531 and UV326, 0.5 part of methyl orthosilicate and 0.1 part of powder deodorant; preparing materials according to the formula;
(2) drying the rubber powder particles at 115 ℃; simultaneously heating the matrix asphalt, adding polymer fibers into the matrix asphalt in the heating process, and shearing for 30min at a rotating speed of 680r/min by using a high-speed shearing machine to obtain an asphalt fiber base material, wherein the heating temperature is 175 ℃;
(3) stirring the rubber powder particles and the asphalt fiber base material at the stirring temperature of 205 ℃, the stirring frequency of 700r/min, and the stirring time of 1.0 hour, so that the rubber powder and the asphalt fiber base material complete desulfurization reaction to obtain a rubber modified asphalt base material;
(4) uniformly mixing basalt, stone chips and mineral powder to obtain mixed powder;
(5) keeping the temperature of the rubber modified asphalt base material at 180 ℃, adding the mixed powder, and shearing and stirring for 5min by using a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 500 r/min; and then adding a mixture of rgafos 168, UV531 and UV326, methyl orthosilicate and a powder deodorant, and shearing and stirring for 45min by a high-speed shearing machine at the rotating speed of 6000r/min to obtain the modified asphalt material.
Effect verification
The modified bituminous materials obtained in examples 1, 2, 3, 4, 5 above were subjected to comparative tests with a base bitumen (control).
The indexes are as follows, and the test results are shown in table 1.
(1) Penetration degree: according to the asphalt penetration test (T0604-. The thickness and the hardness degree of the asphalt are represented by the depth of the standard needle vertically penetrating into the asphalt within 5s at 25 ℃, and the unit is 0.1 mm;
(2) ductility: according to the asphalt ductility test (T0605-2011) in the Experimental Specification for asphalt and asphalt mixtures for road engineering (JTG E20-2011). The ductility was measured at 10 ℃ and 5 cm/min.
(3) Softening point: according to the asphalt ring-and-ball softening point test (T0606-.
TABLE 1 sample Performance test results
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Control sample | |
| Penetration degree | 75.1 | 75.0 | 74.9 | 74.6 | 74.9 | 75.3 |
| Ductility/cm | 45.8 | 45.9 | 46.1 | 46.2 | 44.8 | 38.8 |
| Softening point/. degree.C | 52.9 | 53.7 | 52.9 | 54.1 | 53.2 | 48.4 |
In addition, other tests were as follows, and the test results are shown in table 2.
(4) Short-term thermo-oxidative aging test: the aging treatment is carried out by adopting a rotating film oven test method (RTFOT) according to an asphalt rotating film heating test (T0610-. The modified asphalt materials obtained in examples 1, 2, 3, 4 and 5 after aging treatment were subjected to index detection again with the base asphalt (comparative sample), and compared with the index before aging to evaluate the aging resistance of asphalt by penetration, ductility and softening point.
TABLE 2 sample Performance test results
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Control sample | |
| Penetration degree | 72.3 | 71.8 | 71.2 | 72.4 | 71.9 | 45.9 |
| Ductility/cm | 9.8 | 9.9 | 10.1 | 9.7 | 9.6 | 6.4 |
| Softening point/. degree.C | 55.3 | 56.1 | 54.4 | 55.9 | 55.8 | 54.3 |
In addition, when the modified asphalt materials obtained in the above examples 1, 2, 3, 4 and 5 are constructed, the construction temperature is reduced by more than 25 ℃ and the energy consumption is reduced by more than 20% compared with the base asphalt (comparison sample); the consumption of the petroleum asphalt is reduced by more than 10 percent; the dynamic stability of the material is more than 5000 times; the low-temperature performance of the material is improved by more than 30 percent; the water damage resistance of the material is improved by more than 30 percent; the durability of the material is comprehensively improved by more than 25 percent.
The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.
Claims (7)
1. The anti-aging environment-friendly modified asphalt material is characterized by mainly comprising the following components in parts by mass: 60-70 parts of matrix asphalt, 15-20 parts of colloidal particles, 5-10 parts of coarse aggregate, 5-10 parts of fine aggregate, 3-6 parts of mineral powder, 3-5 parts of polymer fiber, 1-3 parts of antioxidant, 1-3 parts of anti-ultraviolet light agent, 0.3-0.5 part of cross-linking agent and 0.1-0.3 part of deodorant.
2. The anti-aging, environmentally friendly modified asphalt material according to claim 1, wherein the coarse aggregate is basalt; the fine aggregate is stone chips; the polymer fiber is one or a mixture of polypropylene fiber, polyvinyl alcohol fiber and polyacrylonitrile fiber; the antioxidant is one or a mixture of Irganox 1010, Irgafos 168 and HP-136.
3. The anti-aging environment-friendly modified asphalt material as claimed in claim 1, wherein the anti-ultraviolet agent is one or a mixture of UV531, UV326, UV-770 and UV-9; the cross-linking agent is one or a mixture of methyl orthosilicate, aluminum isopropoxide and titanium acetylacetonate; the smell removing agent is a powder smell removing agent.
4. The anti-aging environment-friendly modified asphalt material as claimed in claim 3, wherein the average particle size of the rubber powder particles is 0.4-1.0 mm; the average grain diameter of the basalt is 3-5 mm; the average particle size of the stone chips is 1-3 mm; the average grain diameter of the mineral powder is 0.15-0.30 mm.
5. The preparation method of the anti-aging environment-friendly modified asphalt material as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps:
(1) preparing matrix asphalt, colloidal particles, coarse aggregates, fine aggregates, mineral powder, polymer fibers, an antioxidant, an anti-ultraviolet agent, a cross-linking agent and a deodorant according to the formula;
(2) drying the rubber powder particles, simultaneously heating the matrix asphalt, adding polymer fibers into the matrix asphalt in the heating process, and shearing for 20-30min at the rotating speed of 500-800r/min by using a high-speed shearing machine to obtain an asphalt fiber base material;
(3) stirring the rubber powder particles and the asphalt fiber base material at the stirring temperature of 190-210 ℃, the stirring frequency of 700r/min, the stirring time of 0.8-1.0 h, and performing desulfurization reaction on the rubber powder particles and the asphalt fiber base material to obtain a rubber modified asphalt base material;
(4) uniformly mixing the coarse aggregate, the fine aggregate and the mineral powder to obtain mixed powder;
(5) keeping the temperature of the rubber modified asphalt base material at 170-180 ℃, adding the mixed powder, shearing and stirring for 3-5min by a high-speed shearing machine, then adding the antioxidant, the anti-ultraviolet agent, the cross-linking agent and the deodorant, and shearing and stirring for 30-50min by the high-speed shearing machine to obtain the modified asphalt material.
6. The preparation method of the anti-aging environment-friendly modified asphalt material as claimed in claim 5, wherein the drying temperature of the rubber powder particles in the step (2) is 110-120 ℃; the heating temperature of the matrix asphalt is 170-180 ℃.
7. The preparation method of the anti-aging environment-friendly modified asphalt material as claimed in claim 5, wherein the rotation speed of the high-speed shearing machine after the mixed powder is added in the step (5) is 300-500 r/min; after the antioxidant, the anti-ultraviolet light agent, the cross-linking agent and the deodorant are added, the rotating speed of the high-speed shearing machine is 5000-.
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Application publication date: 20210518 |