Magnetic powder modified asphalt mixture and preparation method thereof

A technology of asphalt mixture and modified asphalt, which is applied in the direction of magnetic objects, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problem of large flexibility of orthotropic steel bridge deck, complex stress and deformation pavement, asphalt Improve the road performance and durability, make the preparation process economical and durable, and improve performance

Inactive Publication Date: 2020-11-03
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The asphalt concrete pavement system of the steel bridge deck is directly paved on the orthotropic steel bridge deck. Due to the large flexibility of the orthotropic steel bridge deck, under the combined action of natural factors such as traffic loads and temperature changes, wind loads, and earthquakes, its The force and deform

Method used

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  • Magnetic powder modified asphalt mixture and preparation method thereof
  • Magnetic powder modified asphalt mixture and preparation method thereof

Examples

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Example Embodiment

[0031] The present invention will be described in detail below in conjunction with examples. The examples are only preferred embodiments of the present invention, and are not intended to limit the present invention.

[0032] figure 1 An embodiment of a magnetic powder modified asphalt mixture of the present invention and a preparation method thereof is shown. The magnetic powder modified asphalt mixture of this embodiment is characterized in that: the gradation type is SMA-10; the selected magnetic powder has a particle size of 100 Micron neodymium iron boron magnetic powder; surfactant is silane coupling agent Si69; asphalt is SBS modified asphalt; aggregate is diabase aggregate: fine aggregate particle size is 0~3mm, coarse aggregate particle size is 3 ~5mm and 5~10mm; mineral powder is limestone mineral powder; fiber is lignin fiber.

[0033] According to the Marshall test design, it is determined that the optimal asphalt dosage of SMA-10 is 6.0%, using 2.0% neodymium iron boro...

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Abstract

The invention discloses a magnetic powder modified asphalt mixture and a preparation method thereof, wherein the magnetic powder modified asphalt mixture is prepared by replacing part of mineral powder and fine aggregate components in a traditional asphalt mixture with magnetic powder, and the magnetic powder modified asphalt mixture comprises the following components in percentage by mass: 0.1-50.0% of magnetic powder, 2.0-15.0% of asphalt, 40.0-95.0% of aggregate, 0.0-40.0% of mineral powder, 0.0-1.0% of fiber and 0.0-1.0% of a surfactant. The magnetic powder modified asphalt mixture is mainly used for steel bridge deck pavement, and forms a pavement system together with an anticorrosive coating, a waterproof bonding layer, a buffer layer and the like. After paving, magnetizing the magnetic powder through an external magnetic field to magnetize the mixture paving layer so as to achieve a magnetic hardening effect, so that on the basis of physicochemical bonding of a traditional paving system, magnetic bonding between the mixture of the paving layer and the steel bridge deck slab is additionally increased, and the rigidity difference is reduced; therefore, the interlayer bonding and deformation compliance of the steel bridge deck pavement system are enhanced. The magnetic powder modified asphalt mixture can also be used for technologies such as pavement internal defect self-diagnosis and the like.

Description

technical field [0001] The invention relates to a magnetic powder modified asphalt mixture and a preparation method thereof, which can be applied to the asphalt mixture pavement layer of the steel bridge deck pavement system, and can also be used for the asphalt mixture required by technical requirements such as self-diagnosis of internal defects of the asphalt pavement, and belongs to The field of building materials technology. Background technique [0002] With the rapid development of my country's transportation industry, more and more long-span bridges are being built. Among them, due to the orthotropic steel bridge deck box girder system has the advantages of light weight, strong lateral wind resistance, convenient transportation and erection, better mechanical performance of the space structure, and shorter construction period, it is widely used in modern bridge construction, especially large Widely used in span bridge construction. At the same time, steel deck pavem...

Claims

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Application Information

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IPC IPC(8): C04B26/26H01F13/00H01F41/00
CPCC04B26/26C04B2111/00422H01F13/00H01F41/00C04B14/04C04B14/28C04B18/26C04B14/321C04B24/42
Inventor 不公告发明人
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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