Electrothermal asphalt concrete doped with graphite and carbon fibers

A technology of asphalt concrete and carbon fiber, which is applied in the field of asphalt pavement of road engineering to achieve the effect of fast heating of the pavement, low investment and good comprehensive performance

Inactive Publication Date: 2018-09-21
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in general, because different blending methods and different blending ratios have different effects on snow and ice melting, especially for the application of electrothermal asphalt concrete in bridge deck pavement, there are few studies. Therefore, for different construction environments and different uses There is still a need for further in-depth research on electrothermal asphalt concrete

Method used

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  • Electrothermal asphalt concrete doped with graphite and carbon fibers
  • Electrothermal asphalt concrete doped with graphite and carbon fibers
  • Electrothermal asphalt concrete doped with graphite and carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] For the electrothermal asphalt concrete provided in this example, taking a Marshall test piece (cylindrical body with a diameter of 101.6 mm and a height of 63.5 mm ± 1.3 mm) weighing about 1200 g as an example, the relevant preparation process (the preparation process is as follows: figure 1 shown) are briefly introduced below.

[0049] (1) Aggregate pretreatment

[0050] Refer to the requirements of "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011), set up the aggregate formula, take aggregate materials of different diameters in proportion, and pretreat them separately for later use; the pretreatment mainly refers to Dry each material. In this embodiment, it is specifically placed in an oven and dried for at least 6 hours to a constant weight. After cooling to room temperature, aggregate materials of different diameters are weighed in proportion for use (weighing according to the oil-stone ratio to be used) Aggregate required am...

experiment test example 1

[0121] On the basis of the test pieces prepared in the above examples, the inventors further tested the road performance of each test piece, including: water stability, high temperature stability, low temperature crack resistance, etc. The specific process is briefly introduced as follows.

[0122] (1) Water stability

[0123] Water is one of the main damage factors to the structural stability of asphalt pavement. Under the action of vehicle load, the presence of water and the effect of freezing and thawing make the water in the gaps on the surface of asphalt pavement continuously immerse into the interior of the asphalt pavement. At the same time, due to the dynamic load As a result, the water separates the asphalt from the aggregate, thereby causing damage to the interior of the pavement structure. If things go on like this, it will eventually lead to pits and other phenomena on the asphalt pavement, and the overall bearing capacity of the pavement will be reduced.

[0124]...

experiment test example 2

[0149] Ordinary asphalt concrete is made by mixing asphalt, aggregate and mineral powder. These materials do not have the ability to conduct electricity, so ordinary asphalt concrete has a large resistance value and is an insulator. One of the main purposes of this application is to incorporate conductive materials, so as to facilitate snow melting and deicing operations by means of electric heating. Therefore, this test example mainly tests the electrical conductivity of the test pieces prepared in this application. The specific process is briefly introduced as follows .

[0150] (1) Resistivity test

[0151] Using the two-electrode method, the resistance of the test piece was measured with a multimeter. During the test, a copper sheet was used as an electrode, fixed on both ends of the specimen with electric tape, and graphite powder was coated on the contact surface between the specimen and the electrode to fill the pores and reduce the contact resistance. Finally, use a ...

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Abstract

The invention belongs to the technical field of bituminous pavements in road construction, and particularly relates to patent application of electrothermal asphalt concrete. The electrothermal asphaltconcrete is doped with a conductive phase material, and is electrified and heated so as to achieve the purposes of melting snow and deicing. Preparation raw materials of the electrothermal asphalt concrete consist of asphalt, aggregates, mineral powder and a conductive phase material, and the asphalt-aggregate ratio is 4.5%-6.0%; the conductive phase material consists of graphite and carbon fibers; in percentages by volume, in the electrothermal asphalt concrete, the mixing amount of the graphite is 0-30%; and in percentages by mass, the mixing amount of the carbon fibers is 0-0.3%. The graphite and the carbon fibers are compounded and blended into the asphalt concrete, and jointly act to improve the conductivity of the asphalt concrete; and by addition of composite conductive fillers, the anti-rutting performance of the electrothermal asphalt concrete is improved, the thermal cracking performance is reduced, therefore, requirements for pavement performance are met well, and the practical value is high.

Description

technical field [0001] The invention belongs to the technical field of road engineering asphalt pavement, and specifically relates to a patent application for electric heating asphalt concrete. Background technique [0002] my country's climate changes significantly in four seasons, especially in late autumn, winter and early spring, affected by cold air, the temperature changes significantly, bringing a lot of rainfall and snowfall, making the road surface prone to snow and ice accumulation, which in turn has a greater impact on road traffic. In order to quickly solve the problem of ice and snow on the road, a large amount of industrial salt water and snow melting agent are usually used in the cleaning operation, but the large amount and long-term use of this chemical agent will cause corrosion and damage to roads, bridges and other infrastructure on the one hand, On the other hand, it will also cause long-term damage and pollution to green vegetation, soil and water. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B111/94
CPCC04B26/26C04B2111/0075C04B2111/94C04B2201/50C04B18/12C04B14/28C04B14/024C04B14/386C04B14/14
Inventor 袁玉卿贾淼王祎沛袁之萌王晶晶
Owner HENAN UNIVERSITY
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