CN112142369A - Production process of recycled asphalt mixture - Google Patents
Production process of recycled asphalt mixture Download PDFInfo
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- CN112142369A CN112142369A CN202010878763.1A CN202010878763A CN112142369A CN 112142369 A CN112142369 A CN 112142369A CN 202010878763 A CN202010878763 A CN 202010878763A CN 112142369 A CN112142369 A CN 112142369A
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- asphalt mixture
- mixture
- old asphalt
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
Abstract
The invention provides a production process of a recycled asphalt mixture, which comprises the following steps: s1, soaking and cleaning the old asphalt mixture, drying, crushing, screening, and obtaining two grades of materials after screening; s2, adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into an old asphalt mixture with a small particle size, heating and stirring; s3, preheating the old asphalt mixture with larger particle size, adding the modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the preheated old asphalt mixture, heating and stirring; and S4, mixing the mixture finally obtained in the S2 step and the S3 step according to the proportion, uniformly stirring at the temperature of 150-. The invention can effectively recycle the old asphalt mixture and avoid the waste of resources and the pollution to the environment.
Description
Technical Field
The invention belongs to the technical field of asphalt, and particularly relates to a production process of a regenerated asphalt mixture.
Background
In more than ten years, the highway construction in China has been rapidly developed, wherein the asphalt pavement is a main pavement form, the asphalt pavement is asphalt concrete obtained by heating and mixing crushed stone aggregate, mineral powder and asphalt material in a certain proportion, and the asphalt concrete is paved and rolled, and the asphalt pavement has good driving comfort and excellent service performance. However, in the long-term use of the asphalt pavement, the asphalt pavement enters the maintenance and reconstruction stages one after another and lasts for a long time, a large amount of waste asphalt mixture is generated in the period, if the waste asphalt mixture is discarded, not only is the resource waste caused, but also the environment pollution is caused, and the recycling of the waste asphalt mixture is paid more and more attention based on the two aspects of environmental protection and effective utilization of the resource. Therefore, a production process of a recycled asphalt mixture is urgently needed.
Disclosure of Invention
The invention aims to provide a production process of a recycled asphalt mixture aiming at the defects of the prior art.
The invention provides the following technical scheme:
a production process of a recycled asphalt mixture comprises the following steps:
s1, collecting an old asphalt mixture, soaking and cleaning the old asphalt mixture to remove dust on the surface of the old asphalt mixture, drying, crushing and screening the old asphalt mixture, and screening the old asphalt mixture to obtain two grades of materials, wherein the grain diameter of one grade of material is 0-5mm, and the grain diameter of the other grade of material is 5-20 mm;
s2, adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the old asphalt mixture with the particle size of 0-5mm obtained in the step S1, heating to 150-;
s3, simultaneously with the step S2, preheating the old asphalt mixture with the particle size of 5-20mm in the step S1 to 95-120 ℃, preheating for 30min, then adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the preheated old asphalt mixture with the particle size of 5-20mm, heating to 150-;
and S4, mixing the mixture finally obtained in the S2 step with the mixture finally obtained in the S3 step according to the proportion, uniformly stirring at the temperature of 150-.
Preferably, the modified regenerant is obtained by doping a regenerant with an SBS modifier.
Preferably, the new aggregate comprises the following components: the gravel, sand, stone chips and mineral powder comprise the following components in percentage by mass: 60-80% of broken stone, 15-20% of sand, 10-20% of stone chips and 5-10% of mineral powder.
Preferably, the mass ratio of the raw materials adopted in the step S2 is as follows: 35-50% of old asphalt mixture with the particle size of 0-5mm, 50-80% of new asphalt and 0.5-8% of modified regenerant.
Preferably, the mass ratio of the raw materials adopted in the step S2 is as follows: 20-40% of old asphalt mixture with the particle size of 5-20mm, 60-85% of new asphalt and 0.5-8% of modified regenerant.
Preferably, the mass parts of the mixture finally obtained in the S2 step adopted in the S5 step are 20-45 parts, the mass parts of the mixture finally obtained in the S3 step are 20-45 parts, the mass parts of water are 60-150 parts, and the mass parts of the new aggregate are 85-120 parts.
The invention has the beneficial effects that:
the invention provides a production process of a recycled asphalt mixture, which can effectively recycle an old asphalt mixture and avoid the waste of resources and the pollution of the old asphalt mixture to the environment, the old asphalt mixture is soaked and cleaned to remove dust on the surface of the old asphalt mixture, and the crushed and sieved old asphalt mixture is sieved to obtain two grades of materials, the invention adopts different processes for treatment, the invention needs to carry out preheating treatment on the old asphalt mixture with larger grain diameter in the treatment process, which is beneficial to increasing the addition of the old asphalt mixture in the subsequent process, the modified regenerant of the invention utilizes SBS modifier for modification, and after the modified regenerant is evenly mixed with new asphalt, and the regenerated asphalt mixture is added into the corresponding old asphalt mixture, the process is simple, and the performance of the prepared regenerated asphalt mixture is better.
Detailed Description
Example 1
A production process of a recycled asphalt mixture comprises the following steps:
s1, collecting an old asphalt mixture, soaking and cleaning the old asphalt mixture to remove dust on the surface of the old asphalt mixture, drying, crushing and screening the old asphalt mixture, and screening the old asphalt mixture to obtain two grades of materials, wherein the grain diameter of one grade of material is 0-5mm, and the grain diameter of the other grade of material is 5-20 mm;
s2, adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the old asphalt mixture with the particle size of 0-5mm obtained in the step S1, heating to 150 ℃ and 170 ℃, and stirring for 8-10min, wherein the modified regenerant is obtained by doping SBS modifier into the regenerant, and the mass ratio of the adopted raw materials in the step is as follows: 45% of old asphalt mixture with the particle size of 0-5mm, 52% of new asphalt and 3% of modified regenerant;
s3, simultaneously with the step S2, preheating the old asphalt mixture with the particle size of 5-20mm in the step S1 to 95-120 ℃, preheating for 30min, then adding a modified regenerant into the new asphalt, uniformly mixing, then adding the mixture into the preheated old asphalt mixture with the particle size of 5-20mm, heating to 150-: 30% of old asphalt mixture with the particle size of 5-20mm, 68% of new asphalt and 2% of modified regenerant;
s4, mixing the mixture finally obtained in the S2 step with the mixture finally obtained in the S3 step according to a ratio, uniformly stirring at the temperature of 150 ℃ plus 170 ℃, then sequentially adding water and new aggregates into the mixture, and stirring for 30-60min to obtain a regenerated asphalt mixture, wherein the mixture finally obtained in the S2 step is 22 parts by mass, the mixture finally obtained in the S3 step is 22 parts by mass, the water is 75 parts by mass, the new aggregates are 105 parts by mass, and the new aggregates comprise the following components in parts by mass: 63% of broken stone, 17% of sand, 12% of stone chips and 8% of mineral powder.
Example 2
A production process of a recycled asphalt mixture comprises the following steps:
s1, collecting an old asphalt mixture, soaking and cleaning the old asphalt mixture to remove dust on the surface of the old asphalt mixture, drying, crushing and screening the old asphalt mixture, and screening the old asphalt mixture to obtain two grades of materials, wherein the grain diameter of one grade of material is 0-5mm, and the grain diameter of the other grade of material is 5-20 mm;
s2, adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the old asphalt mixture with the particle size of 0-5mm obtained in the step S1, heating to 150 ℃ and 170 ℃, and stirring for 8-10min, wherein the modified regenerant is obtained by doping SBS modifier into the regenerant, and the mass ratio of the adopted raw materials in the step is as follows: 40% of old asphalt mixture with the particle size of 0-5mm, 57% of new asphalt and 3% of modified regenerant;
s3, simultaneously with the step S2, preheating the old asphalt mixture with the particle size of 5-20mm in the step S1 to 95-120 ℃, preheating for 30min, then adding a modified regenerant into the new asphalt, uniformly mixing, then adding the mixture into the preheated old asphalt mixture with the particle size of 5-20mm, heating to 150-: 30% of old asphalt mixture with the particle size of 5-20mm, 68% of new asphalt and 2% of modified regenerant;
s4, mixing the mixture finally obtained in the S2 step with the mixture finally obtained in the S3 step according to a ratio, uniformly stirring at the temperature of 150 ℃ plus 170 ℃, then sequentially adding water and new aggregates into the mixture, and stirring for 30-60min to obtain a regenerated asphalt mixture, wherein the mixture finally obtained in the S2 step is 21 parts by mass, the mixture finally obtained in the S3 step is 25 parts by mass, the water is 80 parts by mass, and the new aggregates are 110 parts by mass, and the new aggregates comprise the following components in mass ratio: 63% of broken stone, 17% of sand, 12% of stone chips and 8% of mineral powder.
Example 3
A production process of a recycled asphalt mixture comprises the following steps:
s1, collecting an old asphalt mixture, soaking and cleaning the old asphalt mixture to remove dust on the surface of the old asphalt mixture, drying, crushing and screening the old asphalt mixture, and screening the old asphalt mixture to obtain two grades of materials, wherein the grain diameter of one grade of material is 0-5mm, and the grain diameter of the other grade of material is 5-20 mm;
s2, adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the old asphalt mixture with the particle size of 0-5mm obtained in the step S1, heating to 150 ℃ and 170 ℃, and stirring for 8-10min, wherein the modified regenerant is obtained by doping SBS modifier into the regenerant, and the mass ratio of the adopted raw materials in the step is as follows: 40% of old asphalt mixture with the particle size of 0-5mm, 57% of new asphalt and 3% of modified regenerant;
s3, simultaneously with the step S2, preheating the old asphalt mixture with the particle size of 5-20mm in the step S1 to 95-120 ℃, preheating for 30min, then adding a modified regenerant into the new asphalt, uniformly mixing, then adding the mixture into the preheated old asphalt mixture with the particle size of 5-20mm, heating to 150-: 25% of old asphalt mixture with the particle size of 5-20mm, 73% of new asphalt and 2% of modified regenerant;
s4, mixing the mixture finally obtained in the S2 step with the mixture finally obtained in the S3 step according to a ratio, uniformly stirring at the temperature of 150 ℃ plus 170 ℃, then sequentially adding water and new aggregates into the mixture, and stirring for 30-60min to obtain a regenerated asphalt mixture, wherein the mixture finally obtained in the S2 step is 20 parts by mass, the mixture finally obtained in the S3 step is 27 parts by mass, the water is 80 parts by mass, and the new aggregates are 105 parts by mass, and the new aggregates comprise the following components in parts by mass: 63% of broken stone, 17% of sand, 12% of stone chips and 8% of mineral powder.
The performance tests of the recycled asphalt mixture prepared in the examples 1-3 show that the Marshall stability is more than 9, the freeze-thaw split strength ratio is more than 82%, the rutting dynamic stability is more than 4000 times/mm, and the technical requirements of asphalt pavement recycling are met.
The invention provides a production process of a recycled asphalt mixture, which can effectively recycle an old asphalt mixture and avoid the waste of resources and the pollution of the old asphalt mixture to the environment, the old asphalt mixture is soaked and cleaned to remove dust on the surface of the old asphalt mixture, and the crushed and sieved old asphalt mixture is sieved to obtain two grades of materials, the invention adopts different processes for treatment, the invention needs to carry out preheating treatment on the old asphalt mixture with larger grain diameter in the treatment process, which is beneficial to increasing the addition of the old asphalt mixture in the subsequent process, the modified regenerant of the invention utilizes SBS modifier for modification, and after the modified regenerant is evenly mixed with new asphalt, and the regenerated asphalt mixture is added into the corresponding old asphalt mixture, the process is simple, and the performance of the prepared regenerated asphalt mixture is better.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The production process of the recycled asphalt mixture is characterized by comprising the following steps of:
s1, collecting an old asphalt mixture, soaking and cleaning the old asphalt mixture to remove dust on the surface of the old asphalt mixture, drying, crushing and screening the old asphalt mixture, and screening the old asphalt mixture to obtain two grades of materials, wherein the grain diameter of one grade of material is 0-5mm, and the grain diameter of the other grade of material is 5-20 mm;
s2, adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the old asphalt mixture with the particle size of 0-5mm obtained in the step S1, heating to 150-;
s3, simultaneously with the step S2, preheating the old asphalt mixture with the particle size of 5-20mm in the step S1 to 95-120 ℃, preheating for 30min, then adding a modified regenerant into the new asphalt, uniformly mixing, adding the mixture into the preheated old asphalt mixture with the particle size of 5-20mm, heating to 150-;
and S4, mixing the mixture finally obtained in the S2 step with the mixture finally obtained in the S3 step according to the proportion, uniformly stirring at the temperature of 150-.
2. The process for producing a recycled asphalt mixture according to claim 1, wherein the modified recycling agent is obtained by doping an SBS modifier into a recycling agent.
3. The process for producing a reclaimed asphalt mixture according to claim 2, wherein the new aggregate comprises the following components: the gravel, sand, stone chips and mineral powder comprise the following components in percentage by mass: 60-80% of broken stone, 15-20% of sand, 10-20% of stone chips and 5-10% of mineral powder.
4. The recycled asphalt mixture production process according to claim 3, wherein the raw materials adopted in the step S2 comprise the following raw materials in percentage by mass: 35-50% of old asphalt mixture with the particle size of 0-5mm, 50-80% of new asphalt and 0.5-8% of modified regenerant.
5. The recycled asphalt mixture production process according to claim 4, wherein the raw materials adopted in the step S2 comprise the following raw materials in percentage by mass: 20-40% of old asphalt mixture with the particle size of 5-20mm, 60-85% of new asphalt and 0.5-8% of modified regenerant.
6. The process for producing a reclaimed asphalt mixture according to claim 5, wherein the mass part of the mixture finally obtained in the step S2 adopted in the step S5 is 20 to 45 parts, the mass part of the mixture finally obtained in the step S3 is 20 to 45 parts, the mass part of water is 60 to 150 parts, and the mass part of the new aggregate is 85 to 120 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010878763.1A CN112142369A (en) | 2020-08-27 | 2020-08-27 | Production process of recycled asphalt mixture |
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| CN202010878763.1A CN112142369A (en) | 2020-08-27 | 2020-08-27 | Production process of recycled asphalt mixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573272A (en) * | 2022-01-26 | 2022-06-03 | 山东省路桥集团有限公司 | Regeneration method for microwave heating activation of old asphalt mixture |
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| CN104861676A (en) * | 2015-06-11 | 2015-08-26 | 山东大学 | Waste superpolymer based comprehensive asphaltic-mixture modifier and preparation method and application thereof |
| CN105255205A (en) * | 2015-10-21 | 2016-01-20 | 王立志 | Low temperature recycled asphalt mixture and preparation method thereof |
| CN108623201A (en) * | 2018-08-16 | 2018-10-09 | 桂勘 | A kind of preparation method of large scale regenerating waste asphalt mixture |
| KR101954232B1 (en) * | 2018-09-03 | 2019-03-06 | 주식회사 지케이기술연구소 | Hardening Waterproof Guss Asphalt Concrete Composition for Paving Which Comprising Rycycling Asphalt, SIS, SBS, and Aggregate-powder of Improved Grain Size for Improving Waterproof and Constructing Methods Using Thereof |
| CN109678397A (en) * | 2019-01-19 | 2019-04-26 | 江苏盛达飞建筑材料有限公司 | Reclaimed asphalt mixture and preparation method thereof |
-
2020
- 2020-08-27 CN CN202010878763.1A patent/CN112142369A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104861676A (en) * | 2015-06-11 | 2015-08-26 | 山东大学 | Waste superpolymer based comprehensive asphaltic-mixture modifier and preparation method and application thereof |
| CN105255205A (en) * | 2015-10-21 | 2016-01-20 | 王立志 | Low temperature recycled asphalt mixture and preparation method thereof |
| CN108623201A (en) * | 2018-08-16 | 2018-10-09 | 桂勘 | A kind of preparation method of large scale regenerating waste asphalt mixture |
| KR101954232B1 (en) * | 2018-09-03 | 2019-03-06 | 주식회사 지케이기술연구소 | Hardening Waterproof Guss Asphalt Concrete Composition for Paving Which Comprising Rycycling Asphalt, SIS, SBS, and Aggregate-powder of Improved Grain Size for Improving Waterproof and Constructing Methods Using Thereof |
| CN109678397A (en) * | 2019-01-19 | 2019-04-26 | 江苏盛达飞建筑材料有限公司 | Reclaimed asphalt mixture and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573272A (en) * | 2022-01-26 | 2022-06-03 | 山东省路桥集团有限公司 | Regeneration method for microwave heating activation of old asphalt mixture |
| CN114573272B (en) * | 2022-01-26 | 2023-03-14 | 山东省路桥集团有限公司 | Regeneration method for microwave heating activation of old asphalt mixture |
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Application publication date: 20201229 |