CN114395267A - Epoxy asphalt and preparation method and application thereof - Google Patents
Epoxy asphalt and preparation method and application thereof Download PDFInfo
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- CN114395267A CN114395267A CN202210308823.5A CN202210308823A CN114395267A CN 114395267 A CN114395267 A CN 114395267A CN 202210308823 A CN202210308823 A CN 202210308823A CN 114395267 A CN114395267 A CN 114395267A
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- asphalt
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention belongs to the technical field of asphalt materials, and particularly relates to epoxy asphalt and a preparation method and application thereof. The epoxy asphalt is prepared from the following raw materials in parts by weight: 20-30 parts of epoxy resin, 10-20 parts of curing agent, 5-10 parts of toughening agent, 3-8 parts of diluent, 30-60 parts of matrix asphalt, 10-20 parts of rubber powder and 0.1-1 part of activating agent. The epoxy asphalt material has high strength and good toughness, ensures that the novel large-gap drainage asphalt mixture (the void ratio is more than 25%) using the epoxy asphalt obviously improves the performances of high-temperature stability, anti-flying and the like, and reduces the occurrence of diseases such as rutting, particle dropping and the like.
Description
Technical Field
The invention belongs to the technical field of asphalt materials, and particularly relates to epoxy asphalt and a preparation method and application thereof.
Background
The existing drainage asphalt pavement complete technical research system in China is mostly applied to provinces and regions with annual average rainfall less than 1500mm and low rainfall intensity, and the using effect is proved to be excellent through years.
In southern areas, most of the provinces are in subtropical monsoon climate, high temperature and rainy all the year round, the average rainfall is more than 1500mm in the year, the internal water storage space of the common drainage asphalt pavement (with the porosity of about 22%) commonly used in China is insufficient, and the accumulated water on the road surface cannot be drained in time, so that two important problems are caused, namely that rainwater runoff is formed on the road surface, the vehicles are easy to float when running, and spray and splash are generated, so that the view of the vehicles behind is shielded, and the driving safety of the roads is seriously influenced. Secondly, rainwater cannot be discharged in time to squeeze accumulated water of vehicle tires passing by the road surface, dynamic water pressure can be generated, and the service life of the road surface can be reduced under the environment of the dynamic water pressure and high temperature for a long time. A novel large-gap drainage asphalt pavement (the void ratio is more than 25%) technology is provided aiming at the high-temperature and rainy characteristics.
Compared with the traditional drainage bituminous pavement, the novel large-porosity bituminous pavement has larger porosity and weaker embedding and extruding action among aggregates. Loosening and peeling are more likely to occur, and the durability is insufficient. In the process of forming the strength of the asphalt mixture, the performance of the asphalt mixture is important to the performance of the asphalt mixture. Therefore, it is necessary to improve the performance of asphalt materials so as to ensure the long-term durability of the pavement while effectively improving the porosity of the pavement to enhance the drainage function.
Disclosure of Invention
The epoxy asphalt has the characteristics of high strength and strong bonding capability, and is suitable for novel large-gap drainage asphalt mixtures. Meanwhile, researches show that the rubber powder can absorb light components in the asphalt to swell, the rubber molecules can be desulfurized and degraded in the swelling process, the properties of the crude rubber can be recovered after swelling, a large-flow net structure and a small amount of chain-shaped objects are formed, and a continuous phase is formed in the asphalt, so that the flexibility of the asphalt is improved, and therefore, the flexibility of the epoxy asphalt can be further improved by adding the rubber powder in the process of preparing the epoxy asphalt.
On the basis, the invention provides epoxy asphalt and a preparation method and application thereof. The epoxy asphalt material has high strength and good toughness, ensures that the novel large-gap drainage asphalt mixture (the void ratio is more than 25%) using the epoxy asphalt obviously improves the performances of high-temperature stability, anti-flying and the like, and reduces the occurrence of diseases such as rutting, particle dropping and the like; according to the invention, the rubber powder is added into the epoxy asphalt, so that the flexibility of the epoxy asphalt is further improved under the condition of ensuring the strength, and the activating agent is added to reduce the interaction force among rubber powder molecular chains, so that the rubber powder is fully dissolved.
Specifically, the invention provides the following technical scheme:
the epoxy asphalt is prepared from the following raw materials: 20-30 parts of epoxy resin, 10-20 parts of curing agent, 5-10 parts of toughening agent, 3-8 parts of diluent, 30-60 parts of matrix asphalt, 10-20 parts of rubber powder and 0.1-1 part of activating agent.
Preferably, the epoxy asphalt is prepared from the following raw materials: 22-24 parts of epoxy resin, 13-15 parts of curing agent, 7-9 parts of toughening agent, 4-6 parts of diluent, 30-35 parts of matrix asphalt, 17-20 parts of rubber powder and 0.3-0.7 part of activating agent. The invention discovers that the epoxy asphalt adopts the raw materials with the components and the dosage, and each component in the raw materials has synergistic action with other components, thereby obviously improving the stability, the anti-dispersion performance, the dynamic stability and the bending strain of the epoxy asphalt.
Preferably, in the above epoxy asphalt, the epoxy resin is a bisphenol a type epoxy resin.
Preferably, in the epoxy asphalt, the curing agent is a polyamide curing agent.
Preferably, in the epoxy asphalt, the toughening agent is one or more selected from a group consisting of an epoxy-terminated toughening agent, a hydroxyl-terminated toughening agent, an amino-terminated toughening agent and a carboxyl-terminated toughening agent;
more preferably a diglycidyl ether-based toughener having a terminal bis-epoxy group.
Preferably, in the above epoxy asphalt, the diluent is a reactive diluent or a non-reactive diluent;
more preferably, the reactive diluent is selected from one or more of phenyl glycidyl ether, tolyl glycidyl ether, n-butyl glycidyl ether, styrene oxide, glycerol triglycidyl ether and glycidyl methacrylate; the non-reactive diluent is selected from one or more of dimethylbenzene, dibutyl benzoate, dioctyl phthalate, styrene, diallyl phthalate and dibutyl phthalate;
further preferably, the diluent is cresyl glycidyl ether.
Preferably, in the epoxy asphalt, the rubber powder is waste tire rubber powder, and the particle size is more preferably 30-50 meshes.
Preferably, in the epoxy asphalt, the activating agent is one or more selected from rubber activating agent 450, rubber activating agent 480, n-dodecyl mercaptan, phenol disulfide, alkylphenol disulfide and 4-methyl phenol disulfide;
more preferably n-dodecyl mercaptan.
The invention also provides a preparation method of the epoxy asphalt, which comprises the following steps:
(1) heating the matrix asphalt to 140-160 ℃, adding the rubber powder into the matrix asphalt, stirring for 20-40 min at a stirring speed of 250-350 r/min, and then shearing for 20-40 min at a shearing speed of 2500-3500 r/min by using a shearing machine;
(2) heating epoxy resin and a curing agent to 55-65 ℃;
(3) and (2) adding epoxy resin, a curing agent, a toughening agent, a diluent and an activating agent into the mixture obtained in the step (1), and then stirring for 3-7 min at the temperature of 140-160 ℃, wherein the stirring speed is 1500-2500 r/min.
The invention also provides application of the epoxy asphalt or the epoxy asphalt prepared by the preparation method in preparing a drainage asphalt mixture, and preferably, the void ratio of the drainage asphalt mixture is more than 25%.
The invention also provides a drainage asphalt mixture, which comprises the following raw materials: the epoxy asphalt or the epoxy asphalt, the aggregate and the fiber prepared by the preparation method; the aggregate is preferably of one of the grades PAC-20, PAC-16, PAC-13 and PAC-10.
The invention has the following beneficial effects:
the epoxy asphalt provided by the invention has the characteristics of high strength and good toughness, can obviously improve the high-temperature performance and the mechanical property of the large-gap drainage asphalt mixture, and solves the problems of insufficient bonding strength among aggregates caused by large gaps of the large-gap drainage asphalt and the like.
The epoxy asphalt provided by the invention has the advantages of simple preparation method, excellent economic benefit, convenience in implementation and no interference from the field environment.
According to the epoxy asphalt provided by the invention, the rubber powder is increased to have higher flexibility under the condition of ensuring the strength, the flexibility of the epoxy asphalt is further improved, the activating agent enables rubber powder particles to be activated and partially degraded, the interaction force between molecular chains is reduced, the rubber powder particles are further swelled in the epoxy asphalt, a certain active group is formed to participate in the curing reaction of the epoxy asphalt, and the ageing resistance of the epoxy asphalt is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to examples, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the 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 experimental procedures used in the following examples are conventional unless otherwise specified. The experimental raw materials and the related equipments used in the following examples are commercially available unless otherwise specified.
Example 1
Embodiment 1 provides an epoxy asphalt, which comprises the following raw materials in parts by weight: 20 parts of bisphenol A type epoxy resin E-44; 12 parts of polyamide epoxy hardener 5125; 5 parts of diglycidyl ether flexibilizer PG-207; 3 parts of tolylglycidyl ether diluent 691; 50 parts of Kunlun 90# base asphalt; 10 parts of 40-mesh waste tire rubber powder; 0.1 part of n-dodecyl mercaptan.
The preparation method of the epoxy asphalt comprises the following steps:
the method comprises the following steps: heating matrix asphalt to 150 ℃, adding 40-mesh waste tire rubber powder in proportion, starting a stirring button, stirring at a speed of 300r/min for 30min, and then using a shearing machine to obtain a mixture, wherein the shearing speed is 3000r/min, and the shearing time is 30 min;
step two: heating epoxy resin and a curing agent to 60 ℃;
step three: and adding epoxy resin, a curing agent, a diluent and other additives into the mixture according to a certain proportion, starting a stirring button, adjusting the stirring speed to 2000r/min, stirring for 5min, and controlling the stirring temperature to 150 ℃ to obtain the epoxy resin/curing agent/diluent.
Example 2
Embodiment 2 provides an epoxy asphalt, which comprises the following raw materials in parts by weight: 22 parts of bisphenol A type epoxy resin E-44; 13 parts of a primary amine curing agent 5125; 6 parts of diglycidyl ether flexibilizer PG-207; 4 parts of tolylglycidyl ether diluent 691; 40 parts of Kunlun 90# base asphalt; 15 parts of 40-mesh waste tire rubber powder; 0.3 part of n-dodecyl mercaptan.
The preparation method of the epoxy asphalt is the same as that of example 1.
Example 3
Embodiment 3 provides an epoxy asphalt, comprising the following raw materials in parts by weight: 23 parts of bisphenol A epoxy resin E-44; 14 parts of a primary amine curing agent 5125; 8 parts of diglycidyl ether flexibilizer PG-207; 5 parts of tolylglycidyl ether diluent 691; 30 parts of Kunlun 90# base asphalt; 20 parts of 40-mesh waste tire rubber powder; 0.5 part of n-dodecyl mercaptan.
The preparation method of the epoxy asphalt is the same as that of example 1.
Comparative example 1
Comparative example 1 provides an epoxy asphalt comprising the following raw materials in parts by weight: 23 parts of bisphenol A epoxy resin E-44; 15 parts of a primary amine curing agent 5125; 7 parts of a diglycidyl ether toughening agent 207; 5 parts of tolylglycidyl ether diluent 691; 50 parts of No. 90 matrix asphalt; 0 part of 40-mesh waste tire rubber powder; 0 part of n-dodecyl mercaptan.
The preparation method of the epoxy asphalt is the same as that of example 1.
Comparative example 2
Comparative example 2 provides a high viscosity modified asphalt, the high viscosity modifier is HVA high viscosity modifier of Zhonglu building (Beijing) engineering materials technology Co., Ltd, the mixing amount is 8% of the asphalt, and the asphalt is SBS modified asphalt produced by Zhengtian Nuo asphalt technology Co., Ltd.
Test examples
Preparing a drainage asphalt mixture: according to the general experimental procedure, the aggregate was heated to 185 ℃, then added to the mixing pot, and the prepared epoxy asphalt of examples and comparative examples, whose asphalt proportion was 4.7% of the aggregate, was added and stirred for 90 seconds. Then, polyester fiber (the fiber content is 0.1% of the asphalt mixture) and limestone mineral powder (the mineral powder content is 4% of the aggregate) are added in sequence and stirred for 90 seconds respectively. The stirring temperature was controlled at 175 ℃. The aggregate is classified into PAC-13.
The drainage asphalt mixtures prepared from the epoxy asphalt of the examples and the comparative examples are prepared into Marshall test pieces, the test pieces are placed into a constant temperature oven at 60 ℃ after being molded at 170 ℃ for curing for 4 days, and Marshall stability tests, Kentaburg scattering tests, rutting tests and trabecular bending rheology tests are respectively carried out according to test regulations of road engineering asphalt and asphalt mixtures (JTJ E20-2011) after curing, and test results are shown in the following table.
TABLE 1 road Performance of asphalt mixture for drainage
As can be seen from the data in Table 1, the large-gap drainage asphalt mixture prepared by adopting HVA high-viscosity modified asphalt in the comparative example 2 has insufficient strength, and various indexes such as stability, flying, dynamic stability, maximum bending strain when a test piece is damaged and the like are all unqualified; embodiments 1 to 3 adopt the large-gap drainage asphalt mixture of the epoxy asphalt of the invention, each performance index is greatly improved, and the high-temperature performance, the anti-scattering performance and the like far exceed the standard requirements.
The toughness of the epoxy asphalt mixture, namely the capacity of the epoxy asphalt mixture to absorb energy in the plastic deformation and fracture process, is characterized by a flow value and the bending tensile strength of a trabecular low-temperature bending test, wherein the higher the flow value is, the higher the strength is, and the better the toughness is. The waste tire rubber powder is added in the embodiments 1-3, the waste tire rubber powder of 40 meshes is not added in the comparative example 1, the flow value of the waste tire powder added in 40 meshes and the maximum bending strain of a test piece during damage are obviously improved from the comparison of test data, the toughness of the asphalt mixture can be obviously improved, and the higher the waste tire powder is added in a certain range, the better the toughness is.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The epoxy asphalt is characterized by being prepared from the following raw materials: 20-30 parts of epoxy resin, 10-20 parts of curing agent, 5-10 parts of toughening agent, 3-8 parts of diluent, 30-60 parts of matrix asphalt, 10-20 parts of rubber powder and 0.1-1 part of activating agent.
2. The epoxy asphalt according to claim 1, characterized in that it is made of raw materials comprising: 22-24 parts of epoxy resin, 13-15 parts of curing agent, 7-9 parts of toughening agent, 4-6 parts of diluent, 30-35 parts of matrix asphalt, 17-20 parts of rubber powder and 0.3-0.7 part of activating agent.
3. The epoxy asphalt according to claim 1 or 2, wherein the epoxy resin is a bisphenol a type epoxy resin;
and/or the curing agent is a polyamide curing agent.
4. The epoxy asphalt according to claim 1 or 2, wherein the toughening agent is one or more selected from the group consisting of an epoxy-terminated toughening agent, a hydroxyl-terminated toughening agent, an amino-terminated toughening agent, and a carboxyl-terminated toughening agent.
5. The epoxy asphalt according to claim 1 or 2, wherein the diluent is a reactive diluent or a non-reactive diluent;
the active diluent is selected from one or more of phenyl glycidyl ether, tolyl glycidyl ether, n-butyl glycidyl ether, styrene oxide, glycerol triglycidyl ether and glycidyl methacrylate; the non-reactive diluent is selected from one or more of xylene, dibutyl benzoate, dioctyl phthalate, styrene, diallyl phthalate and dibutyl phthalate.
6. The epoxy asphalt according to claim 1 or 2, wherein the rubber powder is waste tire rubber powder and has a particle size of 30-50 meshes.
7. The epoxy asphalt according to claim 1 or 2, wherein the activator is selected from one or more of rubber activator 450, rubber activator 480, n-dodecyl mercaptan, phenol disulfide, alkylphenol disulfide, and 4-methyl phenol disulfide.
8. A process for preparing an epoxy asphalt according to any one of claims 1 to 7, characterized by comprising the steps of:
(1) heating the matrix asphalt to 140-160 ℃, adding the rubber powder into the matrix asphalt, stirring for 20-40 min at a stirring speed of 250-350 r/min, and then shearing for 20-40 min at a shearing speed of 2500-3500 r/min by using a shearing machine;
(2) heating epoxy resin and a curing agent to 55-65 ℃;
(3) and (2) adding epoxy resin, a curing agent, a toughening agent, a diluent and an activating agent into the mixture obtained in the step (1), and then stirring for 3-7 min at the temperature of 140-160 ℃, wherein the stirring speed is 1500-2500 r/min.
9. Use of the epoxy asphalt according to any one of claims 1 to 7 or the epoxy asphalt prepared by the preparation method according to claim 8 for preparing a drainage asphalt mixture, wherein the porosity of the drainage asphalt mixture is more than 25%.
10. The drainage asphalt mixture is characterized by comprising the following raw materials: epoxy asphalt according to any one of claims 1 to 7 or prepared by the preparation method according to claim 8, aggregate and fiber; the grading of the aggregate is one of PAC-20, PAC-16, PAC-13 and PAC-10 grading.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210308823.5A CN114395267A (en) | 2022-03-28 | 2022-03-28 | Epoxy asphalt and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210308823.5A CN114395267A (en) | 2022-03-28 | 2022-03-28 | Epoxy asphalt and preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115160811A (en) * | 2022-08-13 | 2022-10-11 | 东南大学 | Super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt |
| CN116836563A (en) * | 2023-07-31 | 2023-10-03 | 山东沂蒙交通发展集团有限公司 | High-toughness epoxy asphalt and preparation process thereof |
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|---|---|---|---|---|
| JP2003064156A (en) * | 2001-08-24 | 2003-03-05 | Toto Kasei Co Ltd | Asphalt epoxy resin composition |
| CN107163593A (en) * | 2017-04-25 | 2017-09-15 | 华北水利水电大学 | Epoxy asphalt road surface materials of heat-resisting waterproof and preparation method thereof |
| CN109486226A (en) * | 2018-12-04 | 2019-03-19 | 河南省交通规划设计研究院股份有限公司 | A kind of rubber asphalt and preparation method thereof that storage performance is stable |
| CN113980643A (en) * | 2021-12-17 | 2022-01-28 | 上海浦东路桥(集团)有限公司 | Asphalt waterproof bonding material and preparation method and construction process thereof |
-
2022
- 2022-03-28 CN CN202210308823.5A patent/CN114395267A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003064156A (en) * | 2001-08-24 | 2003-03-05 | Toto Kasei Co Ltd | Asphalt epoxy resin composition |
| CN107163593A (en) * | 2017-04-25 | 2017-09-15 | 华北水利水电大学 | Epoxy asphalt road surface materials of heat-resisting waterproof and preparation method thereof |
| CN109486226A (en) * | 2018-12-04 | 2019-03-19 | 河南省交通规划设计研究院股份有限公司 | A kind of rubber asphalt and preparation method thereof that storage performance is stable |
| CN113980643A (en) * | 2021-12-17 | 2022-01-28 | 上海浦东路桥(集团)有限公司 | Asphalt waterproof bonding material and preparation method and construction process thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115160811A (en) * | 2022-08-13 | 2022-10-11 | 东南大学 | Super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt |
| CN116836563A (en) * | 2023-07-31 | 2023-10-03 | 山东沂蒙交通发展集团有限公司 | High-toughness epoxy asphalt and preparation process thereof |
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