CN111983321A - Preparation and electric heating performance evaluation method of nano graphene oxide modified asphalt mixture - Google Patents
Preparation and electric heating performance evaluation method of nano graphene oxide modified asphalt mixture Download PDFInfo
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- CN111983321A CN111983321A CN202010840069.0A CN202010840069A CN111983321A CN 111983321 A CN111983321 A CN 111983321A CN 202010840069 A CN202010840069 A CN 202010840069A CN 111983321 A CN111983321 A CN 111983321A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 97
- 239000000203 mixture Substances 0.000 title claims abstract description 68
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 38
- 238000005485 electric heating Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title description 5
- 238000011156 evaluation Methods 0.000 title description 2
- 238000012360 testing method Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000005336 cracking Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 9
- 239000002086 nanomaterial Substances 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000003607 modifier Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002482 conductive additive Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- -1 conductivity Chemical compound 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 150000002193 fatty amides Chemical class 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000008542 thermal sensitivity Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention provides a method for preparing a nano graphene oxide modified asphalt mixture and evaluating the electric heating performance, belongs to the technical field of asphalt mixture electric heating, and solves the problems that at present, two-dimensional nano graphene oxide with a layered structure is rarely adopted to improve the electric heating performance of the asphalt mixture, and the contact resistance during testing and the vehicle load during operation have influence on the resistivity of the asphalt mixture. The method provided by the invention can improve the electric heating performance and the mechanical performance of the asphalt mixture and is beneficial to the development of multifunctional application of the asphalt pavement.
Description
Technical Field
The invention discloses a method for preparing a nano graphene oxide modified asphalt mixture and evaluating the electric heating performance, and belongs to the technical field of asphalt mixture electric heating.
Background
Asphalt mixes comprise two components, asphalt and aggregate. Bitumen is very temperature sensitive, exhibiting brittleness at low temperatures and viscoelastic properties at high temperatures. The reduced performance of asphalt mixes is mainly caused by the decay of the properties of the asphalt, including thermal sensitivity. Therefore, the modifier or the additive is used for improving the performance of the asphalt, but not the design of the mixture, so that the problem of poor performance of the asphalt can be fundamentally solved, and various service performances of the asphalt mixture are improved. Researchers have classified modifiers and additives into four categories: (1) a polymer modifier comprising a plasticizer and an elastomer; (2) chemical modifiers such as sulfur, copper sulfate and other metal compounds; (3) adhesion (anti-peeling) agents such as fatty amides, acids, amine blending agents and lime; (4) the use of fiber in asphalt mixtures has also received much attention due to the successful use of fiber concrete in cement concrete.
In recent years, research has led to the discovery of other promising applications of fibers in asphalt mixes, for example, electrothermal applications incorporating electrically conductive fibers (such as carbon fibers and steel fibers) and fillers in asphalt mixes. The electric heating property enables the multifunctional application of snow melting and deicing of the asphalt pavement, self perception of pavement damage, electric heating self-repairing, energy collection and the like to be realized. The premise for realizing multifunctional application is that the conductivity of the asphalt mixture can be accurately controlled. Studies by scholars have shown that the electrical conductivity is directly proportional to the volume content of the conductive filler or added fibres. However, the tunable resistivity range of conductive asphalt mixtures is very narrow, which limits the development of multifunctional applications for asphalt pavements. Therefore, in the case of self-healing or deicing of an asphalt pavement by heating, the resistivity of the asphalt pavement should be properly controlled to ensure safety and good energy utilization efficiency.
There are two methods of measuring the resistivity of a material: two-electrode methods and four-electrode methods. Research shows that the two-electrode method is suitable for the resistance of more than 106The material of the omega-cm is prepared,but the resistance of the contact may become part of the final measured resistance, affecting the resistivity test results. The four electrode method can eliminate the effect of contact resistance and thus provide a reliable resistivity reading. However, the electrode plate needs to be embedded in the asphalt mixture, and the embedding before compaction or after compaction is difficult, and the internal structure of the asphalt mixture is changed, so that the mechanical property is greatly influenced. To reduce the effect of contact resistance, a copper electrode with graphite powder may be used to fill the voids on the hybrid structure.
However, the main function of the conductive fibers and fillers is to make the asphalt mixture conductive, and the mechanical properties and durability of the asphalt mixture are also affected to some extent. The authors state that too many conductive particles reduce the strength of the asphalt mixture, deteriorating the road properties, and that the effect of different types and contents of conductive fibres or fillers on the electrical and mechanical properties is different. Therefore, the conductive additive should not adversely affect the road performance of the asphalt mixture, but should ensure that the mixture meets the durability requirements. On the other hand, it has been suggested that the pressure of the vehicle may slightly deform the asphalt pavement and also affect the resistivity of the asphalt pavement, and further research is required.
In recent years, carbon nanomaterials and technologies have penetrated into the field of building materials, and among numerous carbon nanomaterials, nanographene and carbon nanotubes have excellent mechanical properties and electric heating properties and higher specific surface areas, so that the carbon nanomaterials become the most interesting carbon nanomaterial modifiers. However, the preparation cost is very high, and it is not practical to widely use the carbon nanomaterial to modify the asphalt, so the use of the carbon nanomaterial modified asphalt is not common. The nano graphene oxide is used as the oxide of the nano graphene, and retains the excellent physical properties of the nano graphene, such as conductivity, barrier property, mechanical property and the like, and the price of the nano graphene oxide is cheaper than that of the nano graphene, so that the economic benefit is higher. In addition, the scholars add the nano graphene oxide into the asphalt mixture, so that the electric heating performance of the asphalt mixture can be obviously improved. The nano graphene oxide not only has a unique layered nano structure and excellent electrical and mechanical properties, but also has good compatibility with asphalt and higher economic benefits.
It can be seen that, at present, zero-dimensional metal particles or one-dimensional carbon fibers and metal fibers are mainly adopted to improve the electric heating performance of the asphalt mixture, but two-dimensional nano graphene oxide with a layered structure is rarely adopted to improve the electric heating performance of the asphalt mixture, and a preparation method of the nano graphene oxide modified asphalt mixture is provided.
The invention aims to modify the asphalt mixture by adopting the nano graphene oxide and provide a method for testing and evaluating the electric heating performance of the asphalt mixture on the premise of not influencing or even improving the mechanical property of the asphalt mixture, and the change condition of the resistivity of the asphalt pavement under the action of vehicle load is simulated by applying compression load to a test piece, so that the asphalt mixture has stronger mechanical property while improving the electric heating performance, the development of multifunctional application of the asphalt pavement is realized, and the method has important practical significance for building the green and sustainable development asphalt pavement.
Disclosure of Invention
(1) Technical problem
The invention aims to provide a method for preparing a nano graphene oxide modified asphalt mixture and evaluating the electric heating performance, which solves the problems that at present, zero-dimensional metal granular or one-dimensional carbon fibers and metal fibers are mainly adopted to improve the electric heating performance of the asphalt mixture, two-dimensional nano graphene oxide with a layered structure is rarely adopted to improve the electric heating performance of the asphalt mixture, the mechanical performance of the conductive asphalt mixture is low, and the contact resistance during testing and the vehicle load during operation have influences on the resistivity of the asphalt mixture.
(2) Technical scheme
In view of the problem of low mechanical property of the current conductive asphalt mixture, the invention aims to provide a method for preparing a nano graphene oxide modified asphalt mixture and evaluating the electric heating property on the basis of the influence of contact resistance during testing and vehicle load during operation on the resistivity of the asphalt mixture on the premise of not influencing or even improving the mechanical property of the asphalt mixture. The technical scheme of the invention is as follows: firstly, modifying an asphalt mixture by adopting nano graphene oxide; secondly, reducing the influence of contact resistance by using a copper electrode with graphite powder, and testing the resistivity and the power-on heating efficiency of the nano graphene oxide modified asphalt mixture by using a two-electrode method; then, arranging four small linear displacement sensors in the middle of the side face of the test piece at equal intervals along the circumferential direction, wherein the arrangement positions are shown in figure 1, applying a compression load to the test piece, measuring the deformation of the test piece in the horizontal direction, simultaneously measuring the resistivity change condition of the test piece, and simulating the resistivity change condition of the asphalt pavement under the action of vehicle load; and finally, evaluating the road performance of the nano graphene oxide modified asphalt mixture, and determining the optimal mixing amount of the nano graphene oxide, so that the asphalt mixture has stronger mechanical properties while improving the electric heating performance, the development of multifunctional application of the asphalt pavement is realized, and the method has important practical significance for building green sustainable asphalt pavement.
(3) Advantageous effects
With the development of economy, the common asphalt mixture can not meet the requirements of people on high-performance and multifunctional asphalt pavements. According to the invention, the nano graphene oxide is adopted to modify the asphalt mixture and test the electric heating performance of the asphalt mixture, and the change condition of the resistivity of the asphalt pavement under the action of vehicle load is simulated by applying a compression load to the test piece. According to the patent technology provided by the invention, positive cooperation with related enterprises is developed, and the nano graphene oxide modified asphalt mixture with good electric heating performance can be developed. The invention relates to a preparation method of a nano graphene oxide modified asphalt mixture, which mainly adopts zero-dimensional metal particles or one-dimensional carbon fibers and metal fibers to improve the electric heating performance of the asphalt mixture, adopts two-dimensional nano graphene oxide with a layered structure to improve the electric heating performance of the asphalt mixture, can obtain better electric heating effect of the asphalt mixture, can improve the mechanical property of the conductive asphalt mixture, reduces the influence of contact resistance during testing and vehicle load during operation on the resistivity of the asphalt mixture, enables the asphalt mixture to have stronger mechanical property while improving the electric heating performance, is beneficial to realizing the development of multifunctional application of the asphalt pavement, and has important practical significance for building green sustainable asphalt pavements.
Drawings
FIG. 1 is a schematic perspective view of a linear displacement sensor arrangement
1-a circular copper sheet; 2-linear displacement sensor position; 3-Standard Marshall test piece
FIG. 2 schematic top view of a linear displacement sensor arrangement
1-a circular copper sheet; 2-linear displacement sensor position
Detailed Description
The invention provides a method for preparing a nano graphene oxide modified asphalt mixture and evaluating electric heating performance, which comprises the following specific implementation steps of:
(1) determining the grading and the optimal oilstone ratio of the fine-grain asphalt mixture, replacing part of mineral powder with nano graphene oxide, and preparing a modified asphalt mixture standard Marshall test piece under different nano graphene oxide mixing amounts;
(2) cutting a copper sheet into a circular copper sheet with the diameter (101.6mm) close to that of a standard Marshall test piece, uniformly coating a layer of graphite powder on one side of the copper sheet contacting the test piece, sticking the copper sheet on two ends of the test piece, fixing the copper sheets on the two ends of the test piece, testing the resistance of the two ends of an electrode of the copper sheet by using a universal meter, and measuring the resistivity of the Marshall test piece;
(3) welding lead wires on copper sheet electrodes at two ends of the test piece, connecting the lead wires to a small-sized transformer with the safe alternating-current voltage of 36V, attaching a platinum resistance card to the middle part of the side surface of the Marshall test piece, connecting the platinum resistance card to a multi-loop temperature patrol instrument, switching on a power supply, and recording the temperature of the test piece every minute to obtain the temperature change condition and the heating efficiency of the test piece;
(4) selecting a test piece with better heating efficiency in the step (3), applying compression loads to two ends of the test piece by using a closed-loop servo hydraulic press in a stress control mode, arranging four small linear displacement sensors in the middle of the side surface of the test piece at equal intervals along the circumferential direction, measuring the deformation of the test piece in the horizontal direction, and measuring the resistivity change condition of the test piece;
(5) according to the rut test, low-temperature trabecula bending and freeze-thaw splitting test method in the existing road engineering asphalt and asphalt mixture test procedure (JTG E20-2011), the influence of different amounts of nano graphene oxide on the high-temperature stability, low-temperature cracking resistance and water stability of the asphalt mixture is evaluated, the optimal amount of nano graphene oxide is determined, the nano graphene oxide modified asphalt mixture is prepared, and the electric heating performance and the mechanical performance of the asphalt mixture are improved.
Claims (1)
1. A method for preparing a nano graphene oxide modified asphalt mixture and evaluating the electric heating performance is characterized by comprising the following specific steps:
(1) determining the grading and the optimal oilstone ratio of the fine-grain asphalt mixture, replacing part of mineral powder with nano graphene oxide, and preparing a modified asphalt mixture standard Marshall test piece under different nano graphene oxide mixing amounts;
(2) cutting a copper sheet into a circular copper sheet with the diameter (101.6mm) close to that of a standard Marshall test piece, uniformly coating a layer of graphite powder on one side of the copper sheet contacting the test piece, sticking the copper sheet on two ends of the test piece, fixing the copper sheets on the two ends of the test piece, testing the resistance of the two ends of an electrode of the copper sheet by using a universal meter, and measuring the resistivity of the Marshall test piece;
(3) welding lead wires on copper sheet electrodes at two ends of the test piece, connecting the lead wires to a small-sized transformer with the safe alternating-current voltage of 36V, attaching a platinum resistance card to the middle part of the side surface of the Marshall test piece, connecting the platinum resistance card to a multi-loop temperature patrol instrument, switching on a power supply, and recording the temperature of the test piece every minute to obtain the temperature change condition and the heating efficiency of the test piece;
(4) selecting a test piece with better heating efficiency in the step (3), applying compression loads to two ends of the test piece by using a closed-loop servo hydraulic press in a stress control mode, arranging four small linear displacement sensors in the middle of the side surface of the test piece at equal intervals along the circumferential direction, measuring the deformation of the test piece in the horizontal direction, and measuring the resistivity change condition of the test piece;
(5) according to the rut test, low-temperature trabecula bending and freeze-thaw splitting test method in the existing road engineering asphalt and asphalt mixture test procedure (JTG E20-2011), the influence of different amounts of nano graphene oxide on the high-temperature stability, low-temperature cracking resistance and water stability of the asphalt mixture is evaluated, the optimal amount of nano graphene oxide is determined, the nano graphene oxide modified asphalt mixture is prepared, and the electric heating performance and the mechanical performance of the asphalt mixture are improved.
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| CN202010840069.0A CN111983321A (en) | 2020-08-19 | 2020-08-19 | Preparation and electric heating performance evaluation method of nano graphene oxide modified asphalt mixture |
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| CN202010840069.0A CN111983321A (en) | 2020-08-19 | 2020-08-19 | Preparation and electric heating performance evaluation method of nano graphene oxide modified asphalt mixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114250058A (en) * | 2020-12-31 | 2022-03-29 | 山西省交通科技研发有限公司 | Double-component pouring sealant for repairing cracks of asphalt concrete pavement and preparation method thereof |
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2020
- 2020-08-19 CN CN202010840069.0A patent/CN111983321A/en active Pending
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