CN106317914A - Warm mix asphalt additive, and preparation method and application method thereof - Google Patents
Warm mix asphalt additive, and preparation method and application method thereof Download PDFInfo
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- CN106317914A CN106317914A CN201510338108.6A CN201510338108A CN106317914A CN 106317914 A CN106317914 A CN 106317914A CN 201510338108 A CN201510338108 A CN 201510338108A CN 106317914 A CN106317914 A CN 106317914A
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- asphalt
- warm
- mix asphalt
- additive
- asphalt additive
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- 239000010426 asphalt Substances 0.000 title claims abstract description 125
- 239000000654 additive Substances 0.000 title claims abstract description 58
- 230000000996 additive effect Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 59
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 40
- 239000002994 raw material Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 239000012188 paraffin wax Substances 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 abstract description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 abstract 2
- 229940075507 glyceryl monostearate Drugs 0.000 abstract 1
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 abstract 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 29
- 239000003795 chemical substances by application Substances 0.000 description 11
- 230000003712 anti-aging effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000003878 thermal aging Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920000428 triblock copolymer Polymers 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a warm mix asphalt additive, and a preparation method and an application method thereof, and belongs to the technical field of asphalt modification. The warm mix asphalt additive is prepared from, by weight, 35-55 parts of paraffin, 28-36 parts of ethylene bisstearamide or glyceryl monostearate, 10-25 parts of butadiene-styrene rubber powder and 8-10 parts of SEBS. The warm mix asphalt additive has the advantages of substantial viscosity reduction effect, excellent ageing resistance and excellent high and low temperature performances; and the preparation method and the application method of the warm mix asphalt additive have the advantages of simple process and convenience in operation.
Description
Technical Field
The invention relates to a warm mix asphalt additive, a preparation method and an application method thereof, belonging to the technical field of asphalt modification.
Background
The asphalt concrete surface layer is used as a seamless continuous pavement, gradually replaces a cement concrete pavement by the advantages of smooth surface, comfortable driving, good wear resistance, lower noise, short construction period, simple maintenance, quick open traffic and the like, and becomes one of the main forms of highway pavements in China and developed countries.
However, asphalt mixtures undergo short-term thermo-oxidative aging during blending, spreading and compaction, which causes rapid deterioration of the asphalt properties in a short period of time. In the use process of the asphalt pavement, the asphalt is radiated by infrared rays and ultraviolet rays in sunlight, and long-term thermal aging and ultraviolet aging occur to the asphalt, so that the asphalt is subjected to a series of complex physicochemical changes, the asphalt pavement is hardened and becomes brittle, diseases are easy to occur, the use performance of the asphalt pavement is greatly influenced, and the service life of the asphalt pavement is shortened. How to improve the anti-aging performance of asphalt and prolong the service life of roads becomes a key problem in the face of domestic road construction.
Since the application of asphalt to roads, developed and mature asphalt mixtures are mainly hot-mix asphalt mixtures, but the hot-mix asphalt mixtures have the defects of high mixing temperature and paving temperature, high harmful gas emission, easy aging of the asphalt mixtures and the like, and cause a plurality of ecological and environmental problems.
In order to protect living environment and reduce environmental pollution and energy exhaustion, all countries in the world strictly limit the emission of greenhouse gases, harmful gases, solid dust and the like. In view of this, Warm Mix Asphalt mixture (WMA) technology should be developed. As a new technology, the asphalt mixture has the same or better road performance with the corresponding hot-mixed asphalt mixture, the paving and mixing temperatures are reduced, the energy consumption and the smoke emission in the production process are greatly reduced, and the ecological value is improved.
Most of warm mixing agents in the market can only improve short-term thermal aging of asphalt mixtures in the processes of mixing, paving and compacting, and the high-temperature performance of the warm mixing agents is poor. Patent CN101831187A discloses a warm mixing agent for rubber modified asphalt, which can reduce the production temperature by 30 ℃, but the additive of the patent reduces the softening point of the rubber modified asphalt and influences the high-temperature performance of the asphalt. The technology of warm mixing can not be adopted for improving the thermal aging and ultraviolet light aging of the asphalt in the using process. The patent CN 101307156A discloses a road asphalt anti-aging composite modifier, and the road asphalt anti-aging composite additive can slow down the aging speed of asphalt, improve the durability of asphalt pavement and prolong the service life of the asphalt pavement. The light shielding agent is prepared by fully mixing the anti-aging agent, the antioxidant and the light shielding agent at normal temperature and pressure for 5-10 minutes by high-speed shearing stirring. However, the light shielding agent, namely carbon black, used in the composite modifier has poor compatibility with asphalt, is not easy to be uniformly mixed, can generate segregation phenomenon, and seriously influences the use effect.
At present, warm-mixing agents adopted by warm-mixing asphalt mixtures generally belong to patent products of foreign professional companies, and the warm-mixing agents have good viscosity reduction effect but have higher cost. The research and development of domestic warm-mix agents are also many, but the performance is not ideal, and the popularization and the application of domestic warm-mix asphalt are greatly restricted, so that the development of the asphalt warm-mix agent with high cost performance is a necessary choice for the road construction development in China.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a warm mix asphalt additive which has obvious viscosity reduction effect, excellent ageing resistance and high and low temperature performance; the invention also provides a preparation method and an application method thereof.
The warm mix asphalt additive is prepared from the following raw materials in parts by weight:
wherein, the paraffin is preferably synthetic paraffin, and the synthetic paraffin preferably comprises the following components: synthetic aliphatic hydrocarbons or esters having a melting point of 95 to 125 ℃.
The particle size of the butadiene styrene rubber powder is 20-80 meshes, and preferably 20-50 meshes.
SEBS is a linear triblock copolymer of polystyrene non-terminated, hydrogenated polybutadiene to obtain an ethylene-butene copolymer as a middle elastomeric block.
The preparation method of the warm mix asphalt additive comprises the step of uniformly mixing the raw materials according to the formula amount at normal temperature to obtain the warm mix asphalt additive.
The application method of the warm mix asphalt additive comprises the steps of heating the matrix asphalt, adding the warm mix asphalt additive, and stirring to obtain the warm mix asphalt.
The application method of the warm-mixed asphalt additive is preferably as follows: firstly, heating the matrix asphalt until the asphalt completely flows, adding the warm-mixed asphalt additive, starting a stirring device to stir until the additive is melted uniformly, and obtaining the warm-mixed asphalt.
Wherein,
the matrix asphalt is road asphalt, and the road asphalt is preferably No. 70 road asphalt.
In the process of preparing the warm mix asphalt, the amount of the warm mix asphalt additive accounts for 2-6 wt% of the amount of the matrix asphalt.
The heating of the base asphalt is to heat the base asphalt to 130-170 ℃, preferably to 140-160 ℃.
The stirring speed is 450-600 r/min, and the stirring time is 40-60 min.
In conclusion, the beneficial effects of the invention are as follows:
(1) the warm mix asphalt additive disclosed by the invention has a remarkable viscosity reduction effect and excellent ageing resistance and high and low temperature performance, and can reduce the mixing and compacting temperature of an asphalt mixture by 20-40 ℃ when being added into matrix asphalt, so that the asphalt can be mixed at a lower temperature without influencing the high and low temperature performance.
(2) The invention also provides a preparation method of the additive, which has simple process and is easy to realize.
(3) When the additive is applied, the mixing reaction process can be completed only by adopting common stirring equipment, high-shear grinding equipment is not needed, and the additive is simple in process, convenient to operate, low in investment, low in energy consumption and convenient to apply.
Detailed Description
The present invention will be further described with reference to the following examples.
All the starting materials used in the examples are commercially available, except where otherwise indicated.
Example 1
The warm mix asphalt additive is prepared by mixing the following raw materials in parts by weight:
the preparation method comprises the following steps: mixing the raw materials according to the formula ratio at normal temperature, and stirring for 15 minutes to obtain the additive.
The application method comprises the following steps:
heating 400g of 70# road asphalt to 140 ℃, adding an additive accounting for 4 wt.% of the total amount of the asphalt, starting a stirring device to stir, and stirring for 1h at a stirring speed of 550r/min to obtain the warm-mix asphalt.
Example 2
The warm mix asphalt additive is prepared by mixing the following raw materials in parts by weight:
the preparation method comprises the following steps: mixing the raw materials according to the formula ratio at normal temperature, and stirring for 20 minutes to obtain the additive.
The application method comprises the following steps:
heating 400g of 70# road asphalt to 140 ℃, adding an additive accounting for 4 wt.% of the total amount of the asphalt, starting a stirring device to stir, and stirring for 1h at a stirring speed of 450r/min to obtain the warm-mix asphalt.
Example 3
The warm mix asphalt additive is prepared by mixing the following raw materials in parts by weight:
the preparation method comprises the following steps: mixing the raw materials according to the formula ratio at normal temperature, and stirring for 25 minutes to obtain the additive.
The application method comprises the following steps:
heating 400g of 70# road asphalt to 150 ℃, adding an additive accounting for 5 wt.% of the total amount of the asphalt, starting a stirring device to stir, and stirring for 1h at a stirring speed of 550r/min to obtain the warm-mix asphalt.
Example 4
The warm mix asphalt additive is prepared by mixing the following raw materials in parts by weight:
the preparation method comprises the following steps: mixing the raw materials according to the formula ratio at normal temperature, and stirring for 30 minutes to obtain the additive.
The application method comprises the following steps:
heating 400g of 70# road asphalt to 140 ℃, adding an additive accounting for 5 wt.% of the total amount of the asphalt, starting a stirring device to stir, and stirring for 1h at a stirring speed of 550r/min to obtain the warm-mix asphalt.
Example 5
The warm mix asphalt additive is prepared by mixing the following raw materials in parts by weight:
the preparation method comprises the following steps: mixing the raw materials according to the formula ratio at normal temperature, and stirring for 10 minutes to obtain the additive.
The application method comprises the following steps:
heating 400g of 70# road asphalt to 140 ℃, adding an additive accounting for 4 wt.% of the total amount of the asphalt, starting a stirring device to stir, and stirring for 1h at a stirring speed of 550r/min to obtain the warm-mix asphalt.
Example 6
The warm mix asphalt additive is prepared by mixing the following raw materials in parts by weight:
the preparation method comprises the following steps: mixing the raw materials according to the formula ratio at normal temperature, and stirring for 30 minutes to obtain the additive.
The application method comprises the following steps:
heating 400g of 70# road asphalt to 160 ℃, adding an additive accounting for 5 wt.% of the total amount of the asphalt, starting a stirring device to stir, and stirring for 1h at a stirring speed of 600r/min to obtain the warm-mix asphalt.
The 70# road asphalt and the warm mix asphalt prepared in examples 1-6 were respectively subjected to performance tests, and the test results are shown in table 1.
TABLE 1 asphalt Performance test results
As can be seen from the data in table 1: the penetration degree of the warm-mixed asphalt prepared by adding the warm-mixed asphalt additive provided by the invention after aging/before aging is larger than that of matrix asphalt, which shows that the anti-aging capability of the warm-mixed asphalt prepared by adding the additive is enhanced. The warm-mixed asphalt prepared by adding the additive has high softening point and high ductility, which shows that the high-low temperature performance of the warm-mixed asphalt prepared by adding the additive is obviously improved, and the warm-mixed asphalt has stronger high-temperature anti-rutting performance and low-temperature anti-cracking performance. In addition, the prepared warm-mixed asphalt has lower viscosity at 135 ℃, which shows that the warm-mixed asphalt still has good mixing, paving and compacting performances at a reduced construction temperature, can obviously reduce heat energy consumption, reduce the emission of harmful gas and dust, and avoid thermal aging and performance attenuation of the warm-mixed asphalt in the mixing process.
In conclusion, the warm mix asphalt prepared by adding the warm mix asphalt additive has good ageing resistance.
Claims (9)
1. The warm mix asphalt additive is characterized in that: the feed is prepared from the following raw materials in parts by mass:
2. the warm-mix asphalt additive according to claim 1, wherein: the particle size of the butadiene styrene rubber powder is 20-80 meshes.
3. The warm-mix asphalt additive according to claim 2, wherein: the particle size of the butadiene styrene rubber powder is 20-50 meshes.
4. A method for preparing the warm mix asphalt additive according to claim 1, which is characterized in that: the raw materials with the formula ratio are uniformly mixed at normal temperature to obtain the warm mix asphalt additive.
5. The application method of the warm mix asphalt additive according to claim 1, characterized in that: firstly, heating the matrix asphalt, and then adding the warm-mix asphalt additive to stir, thereby obtaining the warm-mix asphalt.
6. The application method of the warm mix asphalt additive according to claim 5, characterized in that: the dosage of the warm-mixed asphalt additive accounts for 2-6 wt% of the dosage of the matrix asphalt.
7. The application method of the warm mix asphalt additive according to claim 5, characterized in that: the heating of the base asphalt is to heat the base asphalt to 130-170 ℃.
8. The method for applying the warm-mix asphalt additive according to claim 7, wherein: the heating of the matrix asphalt is to heat the matrix asphalt to 140-160 ℃.
9. The application method of the warm mix asphalt additive according to claim 5, characterized in that: the stirring speed is 450-600 r/min, and the stirring time is 40-60 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338108.6A CN106317914B (en) | 2015-06-17 | 2015-06-17 | Warm-mixed asphalt additive, preparation method and applications method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338108.6A CN106317914B (en) | 2015-06-17 | 2015-06-17 | Warm-mixed asphalt additive, preparation method and applications method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106317914A true CN106317914A (en) | 2017-01-11 |
| CN106317914B CN106317914B (en) | 2019-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510338108.6A Active CN106317914B (en) | 2015-06-17 | 2015-06-17 | Warm-mixed asphalt additive, preparation method and applications method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019362A (en) * | 2019-11-21 | 2020-04-17 | 中国水利水电第七工程局有限公司 | Warm mixing agent for asphalt mixture, preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110130328A (en) * | 2010-05-27 | 2011-12-05 | 주식회사 뉴페이브 | Composition of warm mix asphalt additives containing softening, foaming and lubricating agents |
| CN102585523A (en) * | 2010-12-27 | 2012-07-18 | Sk新技术株式会社 | Composition for warm-mix asphalt pavements |
| CN103319905A (en) * | 2007-11-14 | 2013-09-25 | 阿克佐诺贝尔股份有限公司 | Asphalt modifiers for "warm mix" applications including adhesion promoter |
-
2015
- 2015-06-17 CN CN201510338108.6A patent/CN106317914B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319905A (en) * | 2007-11-14 | 2013-09-25 | 阿克佐诺贝尔股份有限公司 | Asphalt modifiers for "warm mix" applications including adhesion promoter |
| KR20110130328A (en) * | 2010-05-27 | 2011-12-05 | 주식회사 뉴페이브 | Composition of warm mix asphalt additives containing softening, foaming and lubricating agents |
| CN102585523A (en) * | 2010-12-27 | 2012-07-18 | Sk新技术株式会社 | Composition for warm-mix asphalt pavements |
Non-Patent Citations (1)
| Title |
|---|
| 张德义: "《含硫原油加工技术（第1版）》", 31 July 2003, 中国石化出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019362A (en) * | 2019-11-21 | 2020-04-17 | 中国水利水电第七工程局有限公司 | Warm mixing agent for asphalt mixture, preparation method and application |
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| CN106317914B (en) | 2019-05-24 |
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