CN106317518A - Warm mix agent used for warm mix asphalt, and application method of warm mix agent - Google Patents
Warm mix agent used for warm mix asphalt, and application method of warm mix agent Download PDFInfo
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- CN106317518A CN106317518A CN201510338107.1A CN201510338107A CN106317518A CN 106317518 A CN106317518 A CN 106317518A CN 201510338107 A CN201510338107 A CN 201510338107A CN 106317518 A CN106317518 A CN 106317518A
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- warm
- asphalt
- mix
- warm mix
- agent
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- 239000010426 asphalt Substances 0.000 title claims abstract description 102
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 18
- 229920001971 elastomer Polymers 0.000 claims abstract description 9
- 239000005060 rubber Substances 0.000 claims abstract description 9
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 8
- 229930195729 fatty acid Natural products 0.000 claims abstract description 8
- 239000000194 fatty acid Substances 0.000 claims abstract description 8
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 8
- 150000001408 amides Chemical class 0.000 claims abstract description 5
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 9
- 235000021355 Stearic acid Nutrition 0.000 claims description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000008117 stearic acid Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 235000021314 Palmitic acid Nutrition 0.000 claims description 3
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 3
- SWSBIGKFUOXRNJ-CVBJKYQLSA-N ethene;(z)-octadec-9-enamide Chemical compound C=C.CCCCCCCC\C=C/CCCCCCCC(N)=O.CCCCCCCC\C=C/CCCCCCCC(N)=O SWSBIGKFUOXRNJ-CVBJKYQLSA-N 0.000 claims description 2
- ZJOLCKGSXLIVAA-UHFFFAOYSA-N ethene;octadecanamide Chemical compound C=C.CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(N)=O ZJOLCKGSXLIVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 6
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- OXDXXMDEEFOVHR-CLFAGFIQSA-N (z)-n-[2-[[(z)-octadec-9-enoyl]amino]ethyl]octadec-9-enamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCNC(=O)CCCCCCC\C=C/CCCCCCCC OXDXXMDEEFOVHR-CLFAGFIQSA-N 0.000 description 2
- 229920002209 Crumb rubber Polymers 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007613 environmental effect Effects 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
- 238000013329 compounding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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 agent used for warm mix asphalt, and an application method of the warm mix agent, and belongs to the technical field of asphalt modification. The warm mix agent used for warm mix asphalt comprises, by mass, 1-5 parts of fatty acids, 0.5-2.5 parts of amide and 1-5 parts of rubber powder; and above three components have synergistic effects. The warm mix agent used for warm mix asphalt can effectively reduce the mixing, lying and rolling temperatures of asphalt, solves the problems of environment pollution, large energy consumption and asphalt ageing decline, has a substantial viscosity reduction effect, also solves the problem of poor low-temperature ductility of warm mix asphalt in the prior art, and also improves the low temperature performances of the asphalt while reducing the viscosity; and the application method is simple, is easy to implement, and is convenient to enforce.
Description
Technical Field
The invention relates to a warm-mixing agent for warm-mixed asphalt and an application method thereof, belonging to the technical field of asphalt modification.
Background
The traditional asphalt pavement construction method is a hot mix asphalt Mixture method HAM (Hot mix asphalt), visible or invisible pollutants can be discharged in the mixing, transporting and constructing processes, so that the environmental problems of greenhouse effect and the like are caused, and the harm is caused to the human health. In order to reduce energy consumption and exhaust emission, people begin to develop energy-saving and environment-friendly warm mix asphalt Mixture WMA (wave mix asphalt). At present, warm mixing technologies adopted for preparing warm-mixed asphalt mixtures are mainly divided into the following three types:
(1) the organic viscosity reduction type warm mixing technology uses an organic viscosity reducer to reduce the viscosity of hot asphalt during mixing, and the organic viscosity reducer mainly comprises wax or esters. The warm mixing technology does not need to modify the original mixing system, and the equipment cost is lower.
(2) The viscosity reduction warm mixing technology of the foamed asphalt reduces the viscosity of the asphalt by foaming the asphalt with water or an organic foaming agent. The warm mixing technology needs to add an asphalt foam generating system, and the investment is large.
(3) The viscosity reducing technology for emulsified and dispersed asphalt is different from the former two technologies in that the viscosity of asphalt is reduced by an emulsifying technology. The warm mixing technology needs to modify equipment and arrange a special warm mixing additive using pipeline.
In the prior art, most of organic warm-mixing agents have great influence on the low-temperature performance of asphalt, warm-mixing modified asphalt with good low-temperature performance has larger viscosity, and warm-mixing ordinary asphalt with small viscosity has poorer low-temperature performance. Chinese patent CN 102976649B discloses a warm mixing agent for crumb rubber modified asphalt and a preparation method thereof, and the warm mixing agent reduces the viscosity of the modified asphalt by reasonably compounding various components, so that the crumb rubber modified asphalt has good construction performance. Even so, the viscosity of the warm-mix modified asphalt is far greater than that of warm-mix ordinary asphalt.
At present, warm-mixing agents adopted by warm-mixed asphalt mixtures generally belong to patent products of foreign professional companies, and the warm-mixing agents have good viscosity reduction effect but 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 warm-mix asphalt 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 the warm-mixing agent for warm-mixed asphalt, which reduces the viscosity of the warm-mixed asphalt and solves the problem of poor low-temperature ductility of the warm-mixed asphalt; the invention also provides an application method of the composition.
The warm-mixing agent for the warm-mixed asphalt comprises the following raw materials in parts by weight:
1-5 parts of fatty acid;
0.5-2.5 parts of amide;
1-5 parts of rubber powder.
Wherein,
the fatty acid is one of stearic acid or palmitic acid.
The amide is one of ethylene bis-oleic acid amide or ethylene bis-stearic acid amide.
The rubber powder is preferably styrene butadiene rubber powder. The fineness of the styrene-butadiene rubber powder is 10-40 meshes.
The application method of the warm-mix agent for the warm-mix asphalt comprises the steps of heating the matrix asphalt to 130-140 ℃, adding the warm-mix agent, and uniformly mixing to obtain the warm-mix asphalt. The uniform mixing is carried out by stirring for 15-25 minutes at a constant temperature of 140-160 ℃.
The matrix asphalt is road petroleum asphalt, and 70# heavy traffic asphalt is preferred.
When the warm-mix asphalt is prepared, the amount of the warm-mix agent accounts for 1-3 wt% of the amount of the matrix asphalt.
In conclusion, the beneficial effects of the invention are as follows:
(1) the components of the warm mixing agent have synergistic effect: the addition of the rubber powder is used for improving the influence of fatty acid on the low-temperature performance of the asphalt, and the addition of the fatty acid can help to solve the problem of high viscosity of the asphalt after the addition of the rubber powder. The ethylene bis-stearamide/ethylene bis-oleamide can improve the influence of fatty acid on the softening point of the asphalt, promote the uniform swelling of rubber powder in the asphalt, improve the heat aging phenomenon of the asphalt in the rubber powder modification process, and simultaneously increase the dispersibility of each component and reduce the viscosity of the asphalt at 135 ℃.
(2) The warm-mixing agent can effectively reduce the mixing, paving and rolling temperatures of asphalt, overcomes the problems of environmental pollution, high energy consumption, asphalt aging recession and the like, has a remarkable viscosity reduction effect, overcomes the problem of poor low-temperature ductility of warm-mixing asphalt in the prior art, and improves the low-temperature performance of the asphalt while reducing the viscosity.
(3) The invention realizes the organic combination of warm mixing and excellent low-temperature performance. With the development of science and technology, environmental benefits and economic benefits generated by the warm-mixed asphalt technology are more prominent, and the warm-mixed asphalt has wider development and application prospects.
(4) The invention also provides an application method of the composition, which is simple and easy to implement and convenient to implement.
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-mixing agent for the warm-mixed asphalt comprises the following raw materials in parts by weight:
1 part of stearic acid, 1 part of ethylene bis stearamide and 1.5 parts of styrene butadiene rubber powder.
The application method of the warm-mixing agent for the warm-mixed asphalt comprises the following steps:
heating 70# heavy traffic asphalt to 130 ℃, adding 3 wt.% of warm mixing agent of 70# heavy traffic asphalt, and stirring for 20 minutes at constant temperature of 160 ℃.
Example 2
The warm-mixing agent for the warm-mixed asphalt comprises the following raw materials in parts by weight:
1 part of palmitic acid, 2 parts of ethylene bis-oleamide and 1 part of styrene butadiene rubber powder.
The application method of the warm-mixing agent for the warm-mixed asphalt comprises the following steps:
heating 70# heavy traffic asphalt to 135 ℃, adding 1 wt.% of warm mixing agent of 70# heavy traffic asphalt, and stirring for 15 minutes at a constant temperature of 150 ℃.
Example 3
The warm-mixing agent for the warm-mixed asphalt comprises the following raw materials in parts by weight:
3 parts of stearic acid, 0.5 part of ethylene bis stearamide and 2 parts of styrene butadiene rubber powder.
The application method of the warm-mixing agent for the warm-mixed asphalt comprises the following steps:
heating 70# heavy traffic asphalt to 138 ℃, adding 1 wt.% of warm mixing agent of 70# heavy traffic asphalt, and stirring for 20 minutes at the constant temperature of 155 ℃.
Example 4
The warm-mixing agent for the warm-mixed asphalt comprises the following raw materials in parts by weight:
4 parts of stearic acid, 2.5 parts of ethylene bis stearamide and 3 parts of styrene butadiene rubber powder.
The application method of the warm-mixing agent for the warm-mixed asphalt comprises the following steps:
heating 70# heavy traffic asphalt to 140 ℃, adding 2 wt.% of warm mixing agent of 70# heavy traffic asphalt, and stirring at constant temperature of 150 ℃ for 25 minutes.
Example 5
The warm-mixing agent for the warm-mixed asphalt comprises the following raw materials in parts by weight:
5 parts of stearic acid, 1.5 parts of ethylene bis stearamide and 2.5 parts of styrene butadiene rubber powder.
The application method of the warm-mixing agent for the warm-mixed asphalt comprises the following steps:
heating 70# heavy traffic asphalt to 140 ℃, adding 2 wt.% of warm mixing agent of 70# heavy traffic asphalt, and stirring for 20 minutes at the constant temperature of 140 ℃.
Comparative example 1
The 70# heavy traffic asphalt was heated to 135 ℃.
Comparative example 2
The 70# heavy traffic asphalt is heated to 135 ℃ and 3 parts stearic acid are added and stirred for 20 minutes at 145 ℃.
The asphalts obtained in examples 1 to 5 and comparative examples 1 to 2 were subjected to the performance test, respectively, and the test results are shown in the following table:
as can be seen from the data in the table, the warm-mixed asphalt prepared by the warm-mixing agent of the invention in the examples 1-5 has lower viscosity at 135 ℃ and increased viscosity at 80 ℃, which shows that the asphalt still has good mixing, paving and compacting performances under the condition of reducing the construction temperature, can obviously reduce the heat energy consumption, reduce the emission of harmful gas and dust, and avoid the thermal aging and performance attenuation of the warm-mixed asphalt in the mixing process. Meanwhile, the low-temperature ductility of the warm-mixed asphalt prepared by the warm-mixing agent is greatly improved, and the softening point is greatly improved, which shows that the high-temperature stability and the low-temperature frost cracking resistance of the warm-mixed asphalt can be improved by adding the warm-mixing agent.
Claims (9)
1. A warm-mixing agent for warm-mixed asphalt is characterized in that: the composite material consists of the following raw materials in parts by mass:
1-5 parts of fatty acid;
0.5-2.5 parts of amide;
1-5 parts of rubber powder.
2. The warm-mix agent for warm-mix asphalt according to claim 1, characterized in that: the fatty acid is one of stearic acid or palmitic acid.
3. The warm-mix agent for warm-mix asphalt according to claim 1, characterized in that: the amide is one of ethylene bis-oleic amide or ethylene bis-stearic amide.
4. The warm-mix agent for warm-mix asphalt according to claim 1, characterized in that: the rubber powder is styrene-butadiene rubber powder.
5. The warm-mix agent for warm-mix asphalt according to claim 4, characterized in that: the fineness of the styrene-butadiene rubber powder is 10-40 meshes.
6. A method of using the warm-mix agent for warm-mix asphalt according to any one of claims 1 to 5, characterized by comprising: when the warm-mix asphalt is prepared, firstly, the matrix asphalt is heated to 130-140 ℃, and the warm-mix agent is added and mixed uniformly to obtain the warm-mix asphalt.
7. The method of using the warm-mix agent for warm-mix asphalt according to claim 6, comprising the steps of: the matrix asphalt is road petroleum asphalt.
8. The method of using the warm-mix agent for warm-mix asphalt according to claim 6, comprising the steps of: the dosage of the warm mixing agent accounts for 1-3 wt% of the dosage of the matrix asphalt.
9. The method of using the warm-mix agent for warm-mix asphalt according to claim 6, comprising the steps of: the uniform mixing is carried out by stirring for 15-25 minutes at a constant temperature of 140-160 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338107.1A CN106317518B (en) | 2015-06-17 | 2015-06-17 | Warm-mixed asphalt warm-mixing agent and its application process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338107.1A CN106317518B (en) | 2015-06-17 | 2015-06-17 | Warm-mixed asphalt warm-mixing agent and its application process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106317518A true CN106317518A (en) | 2017-01-11 |
| CN106317518B CN106317518B (en) | 2018-07-03 |
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| CN201510338107.1A Active CN106317518B (en) | 2015-06-17 | 2015-06-17 | Warm-mixed asphalt warm-mixing agent and its application process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108659553A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | Asphalt flame-retardant thinner and preparation method thereof |
| CN108659552A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | A kind of environmental protection warm-mixed asphalt and preparation method thereof |
| CN108707341A (en) * | 2018-06-11 | 2018-10-26 | 江苏金阳新材料科技有限公司 | A kind of warm-mixed asphalt warm-mixing agent and its application process |
| CN108727844A (en) * | 2018-06-11 | 2018-11-02 | 江苏金阳新材料科技有限公司 | A kind of the warm-mixed asphalt warm-mixing agent and its application process of phosphate ester-containing salt |
| CN113817332A (en) * | 2021-09-24 | 2021-12-21 | 苏州科技大学 | Asphalt warm-mixing agent |
| CN113861703A (en) * | 2020-06-30 | 2021-12-31 | 中国石油化工股份有限公司 | Wheel-sticking-free asphalt material and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108659553A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | Asphalt flame-retardant thinner and preparation method thereof |
| CN108659552A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | A kind of environmental protection warm-mixed asphalt and preparation method thereof |
| CN108659552B (en) * | 2017-03-31 | 2021-10-22 | 中国石油化工股份有限公司 | Environment-friendly heat-insulating mixed asphalt and preparation method thereof |
| CN108707341A (en) * | 2018-06-11 | 2018-10-26 | 江苏金阳新材料科技有限公司 | A kind of warm-mixed asphalt warm-mixing agent and its application process |
| CN108727844A (en) * | 2018-06-11 | 2018-11-02 | 江苏金阳新材料科技有限公司 | A kind of the warm-mixed asphalt warm-mixing agent and its application process of phosphate ester-containing salt |
| CN113861703A (en) * | 2020-06-30 | 2021-12-31 | 中国石油化工股份有限公司 | Wheel-sticking-free asphalt material and preparation method thereof |
| CN113817332A (en) * | 2021-09-24 | 2021-12-21 | 苏州科技大学 | Asphalt warm-mixing agent |
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| Publication number | Publication date |
|---|---|
| CN106317518B (en) | 2018-07-03 |
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