CN115785685A - Natural rock asphalt composite modified asphalt mixture and preparation method thereof - Google Patents
Natural rock asphalt composite modified asphalt mixture and preparation method thereof Download PDFInfo
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- CN115785685A CN115785685A CN202211645993.9A CN202211645993A CN115785685A CN 115785685 A CN115785685 A CN 115785685A CN 202211645993 A CN202211645993 A CN 202211645993A CN 115785685 A CN115785685 A CN 115785685A
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- Prior art keywords
- asphalt
- modified asphalt
- natural rock
- powder
- rubber powder
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- 239000010426 asphalt Substances 0.000 title claims abstract description 153
- 239000011435 rock Substances 0.000 title claims abstract description 43
- 239000000203 mixture Substances 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 62
- 238000010008 shearing Methods 0.000 claims abstract description 22
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 13
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 239000010920 waste tyre Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of asphalt materials, in particular to a natural rock asphalt composite modified asphalt mixture and a preparation method thereof. The mixture comprises the following components in parts by weight: 15-20 parts of natural rock asphalt powder, 16-18 parts of active rubber powder and 62-69 parts of modified asphalt. The method comprises the following steps: s1, mixing waste tire rubber powder and matrix asphalt at a first temperature, and shearing at a high speed to obtain tire rubber powder modified asphalt; s2, mixing the waste plastic powder and the tire rubber powder modified asphalt at a second temperature, and shearing at a high speed to obtain modified asphalt; and S3, at a third temperature, preheating the modified asphalt, mixing the preheated modified asphalt with the active rubber powder to a molten flowing state, adding the natural rock asphalt powder, mixing and stirring uniformly to obtain a finished product. The finished product of the asphalt mixture prepared by the invention has stronger weather resistance, excellent elastic recovery performance, high modulus and better deformation resistance.
Description
Technical Field
The invention relates to the technical field of asphalt materials, in particular to a natural rock asphalt composite modified asphalt mixture and a preparation method thereof.
Background
Natural asphalt is petroleum asphalt formed by extruding petroleum in the earth's crust in the nature for a long time and gradually changing in contact with air and water, and exists in a natural form, wherein minerals are often mixed in a certain proportion. The natural asphalt has the characteristics of high softening point, high asphaltene content, low temperature sensitivity, excellent high-temperature performance, excellent ageing resistance and the like, and also has the advantages of good ash content and asphalt adsorbability and strong water damage resistance. It can be classified into natural rock asphalt, natural lake asphalt, natural seabed asphalt, etc. according to the formed environment.
Natural asphalt, which is often produced in cracks in rocks or mixed in soil, belongs to a relatively special asphalt material, and is of an asphalt-based genus in view of the formation process of the material, and includes various organic chains such as carboxyl, carbonyl, aldehyde, naphthalene, and the like in view of its composition. The organic chains can effectively enable active groups in the petroleum asphalt to be crosslinked and polymerized, when a certain amount of natural asphalt is mixed into a conventional asphalt material, the arrangement mode and the network structure of original asphalt molecules are changed, so that the cohesion and the tensile breaking force of the asphalt are greatly improved, wherein the most prominent expression is that the component proportion of the modified asphalt is obviously different from that of the original asphalt, and in this case, the asphalt property is changed.
In the prior art, natural rock asphalt is often used as a natural reinforcing agent, and the natural rock asphalt can greatly enhance the performance of asphalt products and can be widely used in engineering materials. The natural rock asphalt is not directly used as asphalt, and the common utilization mode is that the natural rock asphalt is mixed with matrix asphalt, natural asphalt additive and the like to enhance the final performance of the asphalt, however, the composite asphalt product has the defects of poor weather resistance and deformation resistance due to poor composite performance.
Disclosure of Invention
Aiming at the problem of poor weather resistance and deformation resistance in the prior art, the invention provides the natural rock asphalt composite modified asphalt mixture and the preparation method thereof, and the weather resistance and deformation resistance of the existing asphalt material are improved.
In a first aspect, the invention provides a natural rock asphalt composite modified asphalt mixture, which comprises the following components in parts by weight: 15-20 parts of natural rock asphalt powder, 16-18 parts of active rubber powder and 62-69 parts of modified asphalt.
Further, the modified asphalt comprises the following components in percentage by weight: 5-15% of waste tire rubber powder, 5-15% of waste plastic powder and 80-90% of matrix asphalt.
Furthermore, the particle size of the natural rock asphalt powder is 40-80 meshes.
In a second aspect, the invention provides a preparation method of a natural rock asphalt composite modified asphalt mixture, which comprises the following steps:
s1, mixing waste tire rubber powder and matrix asphalt at a first temperature, and shearing at a high speed to obtain tire rubber powder modified asphalt;
s2, mixing the waste plastic powder and the tire rubber powder modified asphalt at a second temperature, and shearing at a high speed to obtain modified asphalt;
and S3, at a third temperature, preheating the modified asphalt, mixing the preheated modified asphalt with the active rubber powder to a molten flowing state, adding the natural rock asphalt powder, mixing and stirring uniformly to obtain a finished product.
Further, in the step S1, the first temperature is 170-210 ℃, the high-speed shearing rotating speed is 2500-3500 r/min, and the time is 30-60 min.
Further, in the step S2, the second temperature is 150-170 ℃, the high-speed shearing rotating speed is 2000-2500 r/min, and the time is 20-40 min.
Further, in the step S3, the preheating temperature of the modified asphalt is 170-180 ℃.
Further, in step S3, the third temperature is 180-200 ℃, and the stirring time is 5-10 min.
The invention has the beneficial effects that:
(1) The matrix asphalt is modified by adopting the waste tire rubber powder and the waste plastic powder, so that on one hand, the meltability of the matrix asphalt is improved, the matrix asphalt is more easily dispersed in a composite system to improve the product performance, on the other hand, the waste utilization is realized, and the environmental protection pressure is reduced;
(2) The natural rock asphalt organic chain in the components can enable active groups in the modified asphalt to be crosslinked and polymerized, so that the arrangement mode and the network structure of original asphalt molecules are changed, the cohesion and the tensile breaking strength of an asphalt finished product are greatly improved, and the deformation resistance of the finished product is improved;
(3) The natural rock asphalt coexists with the natural environment, has the function of resisting biological erosion, has better viscosity and oxidation resistance due to high nitrogen content of finished asphalt products, and can improve the weather resistance of engineering materials and slow down the aging speed of the asphalt.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
Example 1
The invention provides a natural rock asphalt composite modified asphalt mixture which comprises the following components in parts by weight: 18 parts of natural rock asphalt powder (with the particle size of 60 meshes), 17 parts of active rubber powder and 64 parts of modified asphalt. Wherein the modified asphalt comprises the following components in percentage by weight: 5% of waste tire rubber powder, 10% of waste plastic powder and 85% of matrix asphalt.
The preparation method of the natural rock asphalt composite modified asphalt mixture comprises the following steps:
s1, mixing waste tire rubber powder and matrix asphalt at 190 ℃, and shearing at a high speed to obtain tire rubber powder modified asphalt, wherein the high-speed shearing rotating speed is 3000r/min, and the time is 50min;
s2, mixing the waste plastic powder and the tire rubber powder modified asphalt at 180 ℃, and shearing at a high speed to obtain the modified asphalt, wherein the high-speed shearing rotating speed is 2200r/min, and the time is 30min;
s3, preheating the modified asphalt to 175 ℃, mixing the preheated modified asphalt with the active rubber powder to a molten flowing state, adding the natural rock asphalt powder, mixing and stirring uniformly for 8min, and obtaining a finished product.
Example 2
The invention provides a natural rock asphalt composite modified asphalt mixture which comprises the following components in parts by weight: 15 parts of natural rock asphalt powder (with the particle size of 40 meshes), 16 parts of active rubber powder and 62 parts of modified asphalt. Wherein the modified asphalt comprises the following components in percentage by weight: 5% of waste tire rubber powder, 5% of waste plastic powder and 90% of matrix asphalt.
The preparation method of the natural rock asphalt composite modified asphalt mixture comprises the following steps:
s1, mixing the waste tire rubber powder and the matrix asphalt at the temperature of 170 ℃, and shearing at a high speed to obtain tire rubber powder modified asphalt, wherein the high-speed shearing rotating speed is 2500r/min and the time is 30min;
s2, mixing the waste plastic powder and the tire rubber powder modified asphalt at the temperature of 150 ℃, and shearing at a high speed to obtain the modified asphalt, wherein the high-speed shearing rotating speed is 2000r/min, and the time is 20min;
and S3, preheating the modified asphalt to 170 ℃ at 180 ℃, mixing the preheated modified asphalt with the active rubber powder to a molten flowing state, adding the natural rock asphalt powder, mixing and stirring uniformly for 5min, and obtaining a finished product.
Example 3
The invention provides a natural rock asphalt composite modified asphalt mixture which comprises the following components in parts by weight: 20 parts of natural rock asphalt powder (with the particle size of 80 meshes), 18 parts of active rubber powder and 69 parts of modified asphalt. Wherein the modified asphalt comprises the following components in percentage by weight: 15% of waste tire rubber powder, 5% of waste plastic powder and 80% of matrix asphalt.
The preparation method of the natural rock asphalt composite modified asphalt mixture comprises the following steps:
s1, mixing the waste tire rubber powder and the matrix asphalt at the temperature of 210 ℃, and shearing at a high speed to obtain tire rubber powder modified asphalt, wherein the high-speed shearing rotating speed is 3500r/min and the time is 60min;
s2, mixing the waste plastic powder and the tire rubber powder modified asphalt at the temperature of 170 ℃, and shearing at a high speed to obtain the modified asphalt, wherein the high-speed shearing rotating speed is 2500r/min, and the time is 40min;
and S3, preheating the modified asphalt to 180 ℃ at 200 ℃, mixing the preheated modified asphalt with the active rubber powder to a molten flowing state, adding the natural rock asphalt powder, mixing and stirring uniformly for 10min, and obtaining a finished product.
The finished products prepared in examples 1-3 were tested for performance index, and the specific results are shown in Table 1.
Table 1 examples 1-3 sample performance index test data
As can be seen from Table 1, the finished asphalt mixture prepared by the invention has the advantages of stronger weather resistance, excellent elastic recovery performance, high modulus and better deformation resistance.
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention.
Claims (8)
1. The natural rock asphalt composite modified asphalt mixture is characterized by comprising the following components in parts by weight: 15-20 parts of natural rock asphalt powder, 16-18 parts of active rubber powder and 62-69 parts of modified asphalt.
2. The natural rock asphalt composite modified asphalt mixture as claimed in claim 1, wherein the modified asphalt comprises the following components by weight percent: 5-15% of waste tire rubber powder, 5-15% of waste plastic powder and 80-90% of matrix asphalt.
3. The natural rock asphalt composite modified asphalt mixture as claimed in claim 1, wherein the particle size of the natural rock asphalt powder is 40-80 mesh.
4. The preparation method of the natural rock asphalt composite modified asphalt mixture as claimed in claim 1, characterized by comprising the following steps:
s1, mixing waste tire rubber powder and matrix asphalt at a first temperature, and shearing at a high speed to obtain tire rubber powder modified asphalt;
s2, mixing the waste plastic powder and the tire rubber powder modified asphalt at a second temperature, and shearing at a high speed to obtain modified asphalt;
and S3, at a third temperature, preheating the modified asphalt, mixing the preheated modified asphalt with the active rubber powder to a molten flowing state, adding the natural rock asphalt powder, mixing and stirring uniformly to obtain a finished product.
5. The preparation method of the natural rock asphalt composite modified asphalt mixture as claimed in claim 4, wherein in the step S1, the first temperature is 170-210 ℃, the high-speed shearing rotation speed is 2500-3500 r/min, and the time is 30-60 min.
6. The preparation method of the natural rock asphalt composite modified asphalt mixture as claimed in claim 4, wherein in the step S2, the second temperature is 150-170 ℃, the high-speed shearing rotation speed is 2000-2500 r/min, and the time is 20-40 min.
7. The preparation method of the natural rock asphalt composite modified asphalt mixture as claimed in claim 4, wherein in the step S3, the preheating temperature of the modified asphalt is 170-180 ℃.
8. The preparation method of the natural rock asphalt composite modified asphalt mixture as claimed in claim 4, wherein in the step S3, the third temperature is 180-200 ℃, and the stirring time is 5-10 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211645993.9A CN115785685A (en) | 2022-12-20 | 2022-12-20 | Natural rock asphalt composite modified asphalt mixture and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211645993.9A CN115785685A (en) | 2022-12-20 | 2022-12-20 | Natural rock asphalt composite modified asphalt mixture and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115785685A true CN115785685A (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211645993.9A Pending CN115785685A (en) | 2022-12-20 | 2022-12-20 | Natural rock asphalt composite modified asphalt mixture and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN115785685A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080048232A (en) * | 2006-11-28 | 2008-06-02 | 한국건설기술연구원 | Modified asphalt binder and manufacturing process thereof |
| CN103360774A (en) * | 2013-08-08 | 2013-10-23 | 山东建筑大学 | Asphaltized rubber modified asphalt and preparation method thereof |
| CN105400220A (en) * | 2015-11-11 | 2016-03-16 | 西南科技大学 | High-modulus rubber asphalt and preparation method thereof |
| CN105924039A (en) * | 2016-05-10 | 2016-09-07 | 黑龙江省中信路桥材料有限公司 | High-modulus rubber asphalt concrete |
| CN113372633A (en) * | 2021-05-20 | 2021-09-10 | 山东大学 | High-dispersion active rubber powder, preparation method thereof and direct-throwing rubber powder modified asphalt |
| CN115490917A (en) * | 2022-09-13 | 2022-12-20 | 山东大学 | Waste rubber powder dissociation reconstruction-gradient activation method and rubber powder-resin rubber-plastic asphalt composite modifier |
-
2022
- 2022-12-20 CN CN202211645993.9A patent/CN115785685A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080048232A (en) * | 2006-11-28 | 2008-06-02 | 한국건설기술연구원 | Modified asphalt binder and manufacturing process thereof |
| CN103360774A (en) * | 2013-08-08 | 2013-10-23 | 山东建筑大学 | Asphaltized rubber modified asphalt and preparation method thereof |
| CN105400220A (en) * | 2015-11-11 | 2016-03-16 | 西南科技大学 | High-modulus rubber asphalt and preparation method thereof |
| CN105924039A (en) * | 2016-05-10 | 2016-09-07 | 黑龙江省中信路桥材料有限公司 | High-modulus rubber asphalt concrete |
| CN113372633A (en) * | 2021-05-20 | 2021-09-10 | 山东大学 | High-dispersion active rubber powder, preparation method thereof and direct-throwing rubber powder modified asphalt |
| CN115490917A (en) * | 2022-09-13 | 2022-12-20 | 山东大学 | Waste rubber powder dissociation reconstruction-gradient activation method and rubber powder-resin rubber-plastic asphalt composite modifier |
Non-Patent Citations (1)
| Title |
|---|
| 陈先华编著: "《土木工程材料学》", vol. 1, 东南大学出版社, pages: 397 - 398 * |
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