CN116836563A - High-toughness epoxy asphalt and preparation process thereof - Google Patents
High-toughness epoxy asphalt and preparation process thereof Download PDFInfo
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- CN116836563A CN116836563A CN202310950036.5A CN202310950036A CN116836563A CN 116836563 A CN116836563 A CN 116836563A CN 202310950036 A CN202310950036 A CN 202310950036A CN 116836563 A CN116836563 A CN 116836563A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 143
- 239000004593 Epoxy Substances 0.000 title claims abstract description 106
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 64
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 64
- 239000011159 matrix material Substances 0.000 claims abstract description 38
- 239000012745 toughening agent Substances 0.000 claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- 239000003085 diluting agent Substances 0.000 claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- STMDPCBYJCIZOD-UHFFFAOYSA-N 2-(2,4-dinitroanilino)-4-methylpentanoic acid Chemical group CC(C)CC(C(O)=O)NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O STMDPCBYJCIZOD-UHFFFAOYSA-N 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000003208 petroleum Substances 0.000 claims description 5
- -1 polysiloxane Polymers 0.000 claims description 5
- 229920001296 polysiloxane Polymers 0.000 claims description 5
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- 230000018109 developmental process Effects 0.000 description 7
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- 239000000126 substance Substances 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002086 nanomaterial Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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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
Abstract
The high-toughness epoxy asphalt of the invention comprises the following components in proportion: 1.0 part of matrix asphalt; 0.9-1.0 parts of epoxy resin, which is marked as X parts; curing agent (0.24-0.26) X parts; solubilizer (0.14-0.16) X parts; 0.10-0.15 parts of toughening agent; diluent (0.15-0.16) X parts. The preparation process of the high-toughness epoxy asphalt comprises the following steps: a) Weighing the components; b) Preheating the components; c) Mixing and dispersing part of the components; d) Preparing the high-toughness epoxy asphalt. According to the high-toughness epoxy asphalt and the preparation process thereof, the tensile strength of the prepared high-toughness epoxy asphalt is more than 3.5MPa, the elongation at break is more than 250%, the holding time is more than 50min, and the technical requirements of the tensile strength of more than 1.0MPa, the elongation at break of more than 100% and the holding time of more than 30min are all well met.
Description
Technical Field
The invention relates to asphalt and a preparation process thereof, in particular to high-toughness epoxy asphalt and a preparation process thereof.
Background
Epoxy asphalt is an important high-performance building material, and the development history of the epoxy asphalt can be traced to the beginning of the 50 th century of the 20 th century, so far, the development history of seventies years exists. With the continuous progress and innovation of technology, epoxy asphalt has been widely applied in the construction and transportation industries.
At the beginning of the 50 s of the 20 th century, J.Paul Hogan invented an epoxy material. This is an important prerequisite for the advent of epoxy asphalt. The epoxy resin has the advantages of high strength, high adhesion, excellent chemical resistance, excellent electrical insulation, high-temperature stability and the like, and provides a foundation and conditions for the research and development of the epoxy asphalt material in the future. In the 60 s of the 20 th century, john Baldrey doctor invented epoxy asphalt and began to apply it to bridge waterproof engineering. The epoxy asphalt marks the appearance of the epoxy asphalt, and solves the problem of water damage of buildings such as bridges and the like caused by rainwater and the like. The epoxy asphalt has the characteristics of good water resistance, strong weather resistance, good adhesive force and the like, and is widely applied to building waterproof engineering of bridges, tunnels and the like. In the 70 s of the 20 th century, along with the continuous popularization of the application of the epoxy asphalt, the epoxy asphalt is widely applied to the fields of construction, aviation, underground engineering, hydraulic engineering and the like. In the 80 s and 90 s of the 20 th century, europe and japan began to use epoxy asphalt in large quantities to repair bridges and tunnels. Meanwhile, the production process and production equipment of the epoxy asphalt are continuously improved and promoted, and better guarantee is provided for the application of the epoxy asphalt.
In the 21 st century, along with continuous progress of science and technology and continuous improvement of requirements of people on performances of building materials, performances and application range of epoxy asphalt are also continuously expanded and improved. For example, the modification of epoxy asphalt by nano materials, polymer materials and the like can improve the performances of the epoxy asphalt in terms of mechanical properties, ageing resistance, chemical resistance and the like. Meanwhile, aiming at application requirements of different fields, such as ocean engineering, cement concrete structures, highway pavement, aviation and the like, deep exploration and research are also carried out in the aspect of research of epoxy asphalt materials, and more possibilities are provided for application of the epoxy asphalt materials.
Compared with common asphalt, epoxy asphalt has various advantages such as durability, corrosion resistance, crack resistance, water resistance and the like, and therefore has wide application in construction engineering. Epoxy asphalt has high durability, can maintain physical and chemical properties for a long time, is not easy to age, crack, deform and the like, and is therefore commonly used on building structures requiring long-term protection. The epoxy asphalt can effectively prevent the corrosion of chemical substances and corrosive substances, can protect building structures from corrosion and damage for a long time, and reduces the maintenance and replacement cost. The epoxy asphalt has higher strength and toughness, and can effectively resist deformation and cracks under the action of external force, thereby ensuring the stability and safety of the building structure. The epoxy asphalt has excellent waterproof performance, can effectively prevent water penetration and water leakage, and ensures the dryness and stability of building structures. The construction process of the epoxy asphalt is simple, the construction speed is high, and the construction efficiency and quality can be improved by adopting mechanized operation. The epoxy asphalt is an environment-friendly energy-saving building material, harmful gas and pollutants are not discharged in the manufacturing process, and energy sources can be saved and energy consumption can be reduced in the using process.
Based on the advantages, the epoxy asphalt can meet multiple requirements on materials in constructional engineering, the application range of the epoxy asphalt is gradually expanded, and technical innovation and improvement are continuously carried out to adapt to different building requirements.
The epoxy asphalt can be used in the projects of road and bridge pavement coating, pavement repair, crack closure and the like, can provide durable waterproof protection and crack resistance, and effectively prolongs the service lives of the road and the bridge. In tunnel engineering, the epoxy asphalt can be used for waterproof coatings, crack resistance treatment, fireproof coatings and the like of floors and walls, and the excellent performance of the epoxy asphalt can effectively protect tunnel structures and enhance the safety and durability of tunnels. The epoxy asphalt can be used for lining and coating of underground pipelines to improve corrosion resistance and durability of the pipelines, and can effectively prevent corrosion and abrasion of the inner walls of the pipelines and prolong the service life of the pipelines. The epoxy asphalt can be used for waterproof coatings of hydraulic engineering, dams, sluice, coatings of reservoirs and the like, can provide reliable waterproof performance, prevents hydraulic structures from being corroded and leaked by water, and ensures the safety and stability of the hydraulic structures. The epoxy asphalt can be used for surface anti-corrosion coatings, wear-resistant coatings and the like of industrial equipment, the anti-corrosion performance of the epoxy asphalt can effectively prolong the service life of the equipment, and the maintenance and replacement cost of the equipment is reduced.
Research and application of epoxy asphalt are also gaining extensive attention and development in China. One aspect is the material modification of epoxy asphalt. Aiming at the characteristics and application requirements of the epoxy asphalt, domestic researchers are continuously explored and improved, and mainly comprise the following aspects:
(1) The performance of the epoxy resin material is improved, for example, the epoxy resin is synthesized by using the epoxy resin monomer with a special structure, and the heat resistance, the chemical corrosion resistance, the fatigue resistance and the like of the epoxy asphalt are improved.
(2) The nano material, the polymer material and the like are utilized to modify the epoxy asphalt, so that the performances of the epoxy asphalt in the aspects of mechanical property, ageing resistance, chemical resistance and the like can be improved, for example, the nano material such as carbon nano tubes, nano ferric oxide and the like is used for preparing the nano composite epoxy asphalt.
(3) The novel epoxy resin monomer and epoxy asphalt material are developed, for example, materials such as polyvinyl alcohol, vinyl acetate and the like are added into the epoxy asphalt, so that the performances such as adhesiveness and water resistance of the epoxy asphalt can be improved.
Another aspect is the field of application of epoxy asphalt. At present, the main application fields of the domestic epoxy asphalt comprise:
(1) Road traffic field: such as expressways, urban roads, airport runways and the like, and is used for engineering in the aspects of water resistance, corrosion resistance, wear resistance and the like of pavements.
(2) Ocean engineering field: such as ocean platforms, wharfs, breakwaters and the like, are used for engineering in the aspects of corrosion resistance, water resistance and the like in ocean environments.
(3) Building field: such as large buildings, tunnels, etc., are used for waterproof, soundproof, anticorrosion engineering, etc.
Finally, the production process of the epoxy asphalt. Along with the continuous expansion of the application of the epoxy asphalt in China, the production process is also continuously improved and optimized, for example, the production efficiency and the product quality are improved by adopting novel materials, novel processes, novel equipment and other means.
In conclusion, the research and application of the domestic epoxy asphalt are in the stage of rapid development, and the epoxy asphalt has wide market application prospect and development space. The application field of the epoxy asphalt in China has a large development space at present, and particularly has huge demands and markets in the aspects of building field, ocean engineering field, industrial field and the like. In addition, the increasing environmental awareness and the pushing of policies also provide good environments for the application of the epoxy asphalt, such as the export of the policies of the national water pollution control action plan and the like, and also provide more opportunities for the application of the epoxy asphalt.
In addition, along with the continuous progress of technology, the aspects of material modification, production process and the like of the epoxy asphalt are further researched and developed, and the epoxy asphalt is hopeful to develop better products to meet the demands of different fields. In general, research and application of the domestic epoxy asphalt are developing towards more efficient, environment-friendly and sustainable directions, and have wide application prospects and development spaces.
Disclosure of Invention
The invention provides high-toughness epoxy asphalt and a preparation process thereof in order to overcome the defects of the technical problems.
The high-toughness epoxy asphalt is characterized in that: comprises matrix asphalt, epoxy resin, a curing agent, a solubilizer, a toughening agent and a diluent, wherein the mass portion ratio of the matrix asphalt to the epoxy resin is as follows:
the high-toughness epoxy asphalt disclosed by the invention is characterized in that the matrix asphalt is 70# petroleum asphalt, the epoxy resin is bisphenol A type epoxy resin, the curing agent is triethanolamine, the solubilizer is polysiloxane, the toughening agent is BE type epoxy toughening agent, and the diluent is allyl glycidyl ether.
The high-toughness epoxy asphalt comprises the following components in parts by weight:
the preparation process of the high-toughness epoxy asphalt is characterized by comprising the following steps of:
a) Weighing the components; weighing required matrix asphalt, epoxy resin, curing agent, solubilizer, toughening agent and diluent according to the mass portion ratio of each component;
b) Preheating the components; placing the weighed matrix asphalt into an oven with the set temperature of 120 ℃ to be preheated for 1h, and placing the weighed epoxy resin, the curing agent, the solubilizer, the toughening agent and the diluent into the oven with the set temperature of 70-80 ℃ to be preheated for 5min;
c) Mixing and dispersing part of the components; pouring matrix asphalt, a curing agent, a solubilizer, a toughening agent and a diluent into the same container, and carrying out oil bath heating at 140 ℃, wherein a variable frequency high-speed dispersing machine is utilized to disperse the components in the process of the oil bath heating;
d) Preparing high-toughness epoxy asphalt; pouring the weighed epoxy resin into a container with dispersed components in the step c), and then continuously dispersing by using a variable-frequency high-speed dispersing machine, so as to obtain the high-toughness epoxy asphalt after the dispersing is finished.
According to the preparation process of the high-toughness epoxy asphalt, in the step c), the dispersion rotating speed of the variable-frequency high-speed dispersing machine is 1500r/min, and the dispersion duration is 20min; the dispersion rotating speed of the variable frequency high-speed dispersing machine in the step d) is 2500r/min, and the dispersion duration is 200s.
The beneficial effects of the invention are as follows: the high-toughness epoxy asphalt disclosed by the invention comprises the following components in parts by weight: 0.9 to 1.0 part (marked as X parts): (0.24-0.26) X parts: (0.14-0.16) X parts: (0.10-0.15) X parts: and (0.15-0.16) X parts, wherein in the preparation process, firstly, the weighed components are preheated, then, matrix asphalt, a curing agent, a solubilizer, a toughening agent and a diluent are mixed and dispersed by using a variable frequency high-speed dispersing machine, finally, epoxy resin is added and dispersed by using the high-speed dispersing machine to prepare high-toughness epoxy asphalt, the tensile strength of the prepared high-toughness epoxy asphalt is more than 3.5MPa, the elongation at break is more than 250%, the holding time is more than 50min, and the technical requirements of the tensile strength of the prepared high-toughness epoxy asphalt is more than 1.0MPa, the elongation at break is more than 100% and the holding time is more than 30min are all well met.
Detailed Description
The invention is further illustrated below with reference to examples.
The components of the high-toughness epoxy asphalt comprise matrix asphalt, epoxy resin, a curing agent, a solubilizer, a toughening agent and a diluent, wherein the matrix asphalt adopts 70# petroleum asphalt, the epoxy resin adopts bisphenol A type epoxy resin, the curing agent adopts triethanolamine, the solubilizer adopts polysiloxane, the toughening agent adopts BE type epoxy toughening agent, and the diluent adopts allyl glycidyl ether.
Specific requirements are made on various indexes of the matrix asphalt in the specification, and basic parameters of the 70# petroleum asphalt adopted in the invention are shown in table 1:
TABLE 1
The index of the bisphenol A type epoxy resin adopted by the epoxy resin is shown in the table 2:
TABLE 2
| Appearance of | Colorless transparent viscous liquid |
| Density (g/cm) 3 ) | 1.16 |
| Epoxy value (mol/100 g) | 0.42 |
| Viscosity at 25℃ (mPa. S) | 11000 |
| Organic chlorine content (mol/100 g) | <0.02 |
| Inorganic chlorine content (mol/100 g) | <0.001 |
| Volatile matter (%) | <1 |
The curing agent in the invention adopts triethanolamine, which is abbreviated as TEOA. The physical indexes are as follows: colorless transparent viscous liquid with slight ammonia smell, solidifying point of 20-21 deg.C, boiling point of 360 deg.C, flash point of 190.6 deg.C and viscosity (35 deg.C) of 613 mPa.s.
The solubilizer in the invention adopts polysiloxane, which is also called silicone oil. The physical indexes are as follows: the milky white viscous liquid is non-volatile, odorless, and has a solidifying point of-59 ℃, a boiling point of 101 ℃ and a flash point of 270 ℃.
The toughening agent adopts BE type epoxy toughening agent, and the quality indexes are shown in table 3:
TABLE 3 Table 3
The thinner of the invention adopts allyl glycidyl ether, AGE for short, the relative molecular weight is 114, the epoxy value is 0.6-0.8, the boiling point is 154 ℃, and the viscosity (20 ℃) is 1-2 mPa.s.
Determination of the optimal proportion of each component in the high-toughness epoxy asphalt:
1. determination of the optimal proportion of matrix asphalt to epoxy resin:
the optimal mixing amount of the matrix asphalt and the epoxy resin is determined by the following several indexes: (1) The epoxy resin is in a base phase and the asphalt is in a state that the disperse phase is uniformly dispersed in the epoxy resin under the microcosmic state. The transition of the system from asphalt to a base phase and epoxy resin to a dispersed phase is referred to as "phase inversion"; (2) The mechanical index is required to meet the requirement, the tensile strength is more than or equal to 1.0MPa, and the elongation at break is more than or equal to 100%; (3) The holding time is more than 30min, and the holding time is the time required for the viscosity to increase to 1000 mPas under the condition of 120 ℃.
Designing matrix asphalt: five groups of samples of epoxy resin 1:0.75, 1:0.85, 1:0.95, 1:1.05, 1:1.15 were tested for tack and tensile, respectively, as shown in Table 4, giving tack test results:
TABLE 4 Table 4
As can be seen from table 4, the matrix asphalt: when the epoxy resin is 1:0.75, the corresponding time is 25min when the viscosity is 895 mPas, and the corresponding time is 30min when the viscosity is 1200 mPas, and the holding time does not meet the requirement of more than 30 min. Matrix asphalt: under the condition that the epoxy resin is 1:0.85, the holding time is between 40 and 45 minutes, and the requirement of more than 30 minutes is met; matrix asphalt: the holding time of the epoxy resin is between 45 and 50min under the condition that the epoxy resin is 1:0.95, and the holding time is about 50min; matrix asphalt: under the condition that the epoxy resin is 1:1.05, the holding time is 45-50 min; matrix asphalt: the holding time of the epoxy resin is between 40 and 45 minutes under the condition of 1:1.15.
Thus, as can be seen from Table 4, as the epoxy ratio increases, the residence time tends to increase and decrease, with an epoxy ratio of 1:0.95 being optimal, about 50 minutes.
As shown in table 5, the matrix asphalt is given: tensile test results for five groups of epoxy resin 1:0.75, 1:0.85, 1:0.95, 1:1.05, 1:1.15:
TABLE 5
| Matrix asphalt: EP systems | Intensity (Mpa) | Maximum elongation (%) |
| 1：0.75 | 3.3 | 112 |
| 1：0.85 | 3.7 | 214 |
| 1：0.95 | 4.1 | 276 |
| 1：1.05 | 5.2 | 128 |
| 1：1.15 | 7.7 | 66 |
As can be seen from table 5, the tensile strength increased with the increase of the epoxy resin ratio, both at 3MPa or more, and the elongation at break also showed a tendency to increase first and then decrease, and the reason for considering this trend was the same as that of the residence time. Wherein the elongation at break of the three groups 1:0.75, 1:0.85, 1:0.95 and 1:1.05 exceeds 100 percent, and the elongation at break of the group 1:0.95 is more high than 270 percent. And (3) integrating the retention time and the mechanical index performance, and finally selecting matrix asphalt: the epoxy resin is 1 (0.90-1.0) which meets the requirements, wherein, the matrix asphalt: the optimum ratio of epoxy resin is 1:0.95.
2. Determination of the optimal ratio of epoxy resin to curing agent:
as shown in table 6, the tack-free experimental results are given for epoxy resin and curing agent ratios of 1:0.2, 1:0.25 and 1:0.3, respectively:
TABLE 6
As shown in table 7, the tensile test results are given for epoxy resin and curing agent ratios of 1:0.2, 1:0.25 and 1:0.3, respectively:
TABLE 7
| Epoxy resin-curing agent ratio | Intensity (Mpa) | Maximum elongation (%) |
| 1：0.2 | 1.3 | 56 |
| 1：0.25 | 2.2 | 256 |
| 1：0.3 | 6.2 | 403 |
The retention time can reach 58 minutes when the ratio of the epoxy resin to the curing agent is 1:0.2, but the mechanical test shows that the epoxy asphalt can not be completely cured under the ratio, so that the tensile strength is lower; when the ratio of the epoxy resin to the curing agent is 1:0.3, the holding time is too short, and the prepared mechanical test piece has high tensile strength and low elongation at break. The retention time of the epoxy resin and the curing agent is about 46min at the ratio of 1:0.25, and the tensile strength and the elongation of the mechanical test piece can meet the requirements in the condition.
The epoxy resin is selected from the following materials according to the comprehensive properties of the comprehensive tensile strength and the elongation percentage and the actual use condition: the curing agent is 1: (0.24-0.26), the optimal ratio of the epoxy resin to the curing agent is 1:0.25.
3. Determination of the optimal amount of solubilizer:
in combination with the layering phenomenon of the macroscopic test piece, the ratio of the epoxy resin to the solubilizer is 1: in the range of (0.14-0.16), a better compatibilization effect can be achieved, meanwhile, the holding time can be maintained above 46min, and the ratio of the epoxy resin to the solubilizer is 1: the mixing ratio of the compatibilizer is optimal at 0.15.
4. Determination of the optimum blending amount of the diluent:
the screening indexes of the diluent mainly comprise three types: (1) residence time (> 30 min); (2) mechanical properties (tensile strength is more than or equal to 1.0MPa, elongation at break is more than or equal to 100%); (3) compatibility. The high-toughness asphalt was prepared according to the weight ratio of matrix asphalt, epoxy resin, curing agent and solubilizer of 1:0.95:0.24:0.14, and then according to the blending amount of the diluent (allyl glycidyl ether) relative to the epoxy resin of 5%, 10% and 15%, respectively, the viscous time experimental results under the different blending amounts of the diluents shown in table 8 and the tensile experimental results shown in table 9 were obtained:
TABLE 8
TABLE 9
| Blending amount | Intensity (Mpa) | Maximum elongation (%) |
| 5％ | 10.4 | 91 |
| 10％ | 8.8 | 108 |
| 15％ | 7.2 | 189 |
It can be seen that when the parameters of the diluent are 5%, the retention time is less than 20min, and the extensibility is also less than 100%, which is not in accordance with the requirements; when the parameter is 10%, the holding time is less than 30min, and the method is not in line with the requirements. When the parameter is 15%, the holding time is more than 30min, the strength is 7.2Mpa, the maximum elongation is 189%, and the parameter meets the index requirement, so the parameter range of the selected diluent is 15% -16%, and the optimal blending amount is 15%.
5. Determination of the optimum doping amount of the toughening agent:
the weight ratio of the matrix asphalt, the epoxy resin, the curing agent, the solubilizer and the diluent is 1:0.95:0.24:0.14: the high-toughness asphalt is prepared according to the proportion of 0.14, and then when the doping amount of the toughening agent (BE type epoxy toughening agent) relative to the epoxy resin is respectively 0%, 10% and 20%, the variation of the holding time of different doping amounts is shown in Table 10, and when the parameters of the toughening agent are 0%, 5% and 10%, 15% and 20%, the mechanical test results are shown in Table 11.
Table 10
It can be seen that the epoxy asphalt without the toughening agent reaches 38min, and the retention time can reach 60min at 20% of the blending amount.
TABLE 11
As can be seen from Table 11, the elongation at break of the test piece is extremely low, only 40%, and the tensile strength is high up to 6.8MPa without adding the toughening agent. When the doping amount of the toughening agent is 10-15%, the tensile strength and the elongation reach a better state, the tensile strength is more than 2.0MPa, and the elongation is increased by nearly 220% compared with that of the toughening agent without doping. But when the proportion of the toughening agent is increased to 20%, the tensile strength is reduced to be extremely low. The doping amount of the toughening agent meets the requirement when 10-15%, but from the economical point of view, the 10% proportion is selected as the optimal doping amount.
According to the analysis, the parameters of the curing agent, the solubilizer, the toughening agent and the diluent relative to the epoxy resin are converted by using the content of the epoxy resin, and the composition components and the optimal blending amount result of the obtained toughened epoxy asphalt are shown in Table 12:
table 12
| Composition of the components | Type(s) | Proportion of |
| Matrix asphalt | 70# petroleum asphalt | 1 |
| Epoxy resin | Bisphenol A type | 0.95 |
| Curing agent | Triethanolamine salt | 0.24 |
| Compatibilizer | Polysiloxane | 0.14 |
| Toughening agent | BE type epoxy toughening agent | 0.095 |
| Diluent agent | Allyl glycidyl ether | 0.14 |
The preparation process of the high-toughness epoxy asphalt is realized by the following steps:
a) Weighing the components; weighing required matrix asphalt, epoxy resin, curing agent, solubilizer, toughening agent and diluent according to the mass portion ratio of each component;
b) Preheating the components; placing the weighed matrix asphalt into an oven with the set temperature of 120 ℃ to be preheated for 1h, and placing the weighed epoxy resin, the curing agent, the solubilizer, the toughening agent and the diluent into the oven with the set temperature of 70-80 ℃ to be preheated for 5min;
c) Mixing and dispersing part of the components; pouring matrix asphalt, a curing agent, a solubilizer, a toughening agent and a diluent into the same container, and carrying out oil bath heating at 140 ℃, wherein a variable frequency high-speed dispersing machine is utilized to disperse the components in the process of the oil bath heating;
in the step, the dispersing rotating speed of the variable-frequency high-speed dispersing machine is 1500r/min, and the dispersing duration is 20min;
d) Preparing high-toughness epoxy asphalt; pouring the weighed epoxy resin into a container with dispersed components in the step c), and then continuously dispersing by using a variable-frequency high-speed dispersing machine, so as to obtain the high-toughness epoxy asphalt after the dispersing is finished.
In the step, the dispersing rotating speed of the variable-frequency high-speed dispersing machine is 2500r/min, and the dispersing duration is 200s.
Preparing a test piece from the high-toughness epoxy asphalt obtained in the step d), wherein the standard curing condition is 80 ℃ for 6h+120 ℃ for 1h, namely curing for 6 hours at 80 ℃, then curing for 1 hour at 120 ℃, and then standing for 1d at room temperature after the test piece is cured. Various performance tests were performed and the results are shown in Table 13:
TABLE 13
The tensile strength of the test piece prepared by the high-toughness epoxy asphalt is more than 3.5MPa, the elongation at break is more than 250%, the holding time is more than 50min, and the tensile strength is more than 1.0MPa, the elongation at break is more than 100%, and the holding time is more than 30 min.
Claims (5)
1. A high-toughness epoxy asphalt is characterized in that: comprises matrix asphalt, epoxy resin, a curing agent, a solubilizer, a toughening agent and a diluent, wherein the mass portion ratio of the matrix asphalt to the epoxy resin is as follows:
1.0 part of matrix asphalt;
0.9-1.0 parts of epoxy resin, which is marked as X parts;
curing agent (0.24-0.26) X parts;
solubilizer (0.14-0.16) X parts;
0.10-0.15 parts of toughening agent;
diluent (0.15-0.16) X parts.
2. The high-toughness epoxy asphalt according to claim 1, wherein: the matrix asphalt is 70# petroleum asphalt, the epoxy resin is bisphenol A epoxy resin, the curing agent is triethanolamine, the solubilizer is polysiloxane, the toughening agent is BE type epoxy toughening agent, and the diluent is allyl glycidyl ether.
3. The high-toughness epoxy asphalt according to claim 1 or 2, characterized in that: the matrix asphalt, the epoxy resin, the curing agent, the solubilizer, the toughening agent and the diluent are prepared from the following components in parts by mass:
1.0 part of matrix asphalt;
0.95 parts of epoxy resin;
0.24 parts of curing agent;
0.14 parts of solubilizer;
0.095 parts of toughening agent;
0.14 parts of diluent.
4. A preparation process based on the high-toughness epoxy asphalt of claim 2, which is characterized by comprising the following steps:
a) Weighing the components; weighing required matrix asphalt, epoxy resin, curing agent, solubilizer, toughening agent and diluent according to the mass portion ratio of each component;
b) Preheating the components; placing the weighed matrix asphalt into an oven with the set temperature of 120 ℃ for preheating for 1h, and placing the weighed epoxy resin, the curing agent, the solubilizer, the toughening agent and the diluent into the oven with the set temperature of 70-80 ℃ for preheating for 5min;
c) Mixing and dispersing part of the components; pouring matrix asphalt, a curing agent, a solubilizer, a toughening agent and a diluent into the same container, and carrying out oil bath heating at 140 ℃, wherein a variable frequency high-speed dispersing machine is utilized to disperse the components in the process of the oil bath heating;
d) Preparing high-toughness epoxy asphalt; pouring the weighed epoxy resin into a container with dispersed components in the step c), and then continuously dispersing by using a variable-frequency high-speed dispersing machine, so as to obtain the high-toughness epoxy asphalt after the dispersing is finished.
5. The process for preparing high-toughness epoxy asphalt according to claim 4, wherein the process comprises the following steps: the dispersion rotating speed of the variable frequency high-speed dispersion machine in the step c) is 1500r/min, and the dispersion duration is 20min; the dispersion rotating speed of the variable frequency high-speed dispersing machine in the step d) is 2500r/min, and the dispersion duration is 200s.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108912707A (en) * | 2018-07-26 | 2018-11-30 | 江苏增光复合材料科技有限公司 | Fibre enhancement epoxy asphalt pavement material and preparation method thereof |
| CN112538275A (en) * | 2020-12-30 | 2021-03-23 | 句容宁武高新技术发展有限公司 | Epoxy asphalt material for paving steel bridge and preparation method thereof |
| CN114395267A (en) * | 2022-03-28 | 2022-04-26 | 中路交建(北京)工程材料技术有限公司 | Epoxy asphalt and preparation method and application thereof |
| CN116200170A (en) * | 2023-01-19 | 2023-06-02 | 广东能达公路养护股份有限公司 | Anti-skid and anti-scouring asphalt pavement fine solid sealing layer and construction method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108912707A (en) * | 2018-07-26 | 2018-11-30 | 江苏增光复合材料科技有限公司 | Fibre enhancement epoxy asphalt pavement material and preparation method thereof |
| CN112538275A (en) * | 2020-12-30 | 2021-03-23 | 句容宁武高新技术发展有限公司 | Epoxy asphalt material for paving steel bridge and preparation method thereof |
| CN114395267A (en) * | 2022-03-28 | 2022-04-26 | 中路交建(北京)工程材料技术有限公司 | Epoxy asphalt and preparation method and application thereof |
| CN116200170A (en) * | 2023-01-19 | 2023-06-02 | 广东能达公路养护股份有限公司 | Anti-skid and anti-scouring asphalt pavement fine solid sealing layer and construction method thereof |
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