Asphalt mixture for improving microwave absorption efficiency and preparation method thereof

Abstract

The invention discloses an asphalt mixture for improving microwave absorption efficiency, which is composed of the following raw materials in weight percent: 8% to 15% of asphalt filler mixed with magnetite powder, 4% to 6% of asphalt cement, and 40% of basalt coarse aggregate % to 60%, basalt fine aggregate 20% to 40%; among them, the asphalt filler mixed with magnetite powder is formed by mixing magnetite powder and ordinary limestone powder, and the weight of the magnetite powder accounts for 31% to 100% of the total weight of mineral powder asphalt filler. The invention also provides a preparation method of asphalt mixture which improves microwave absorption efficiency. The invention improves the microwave absorption efficiency of the asphalt mixture, ensures the excellent road performance of the asphalt mixture, has the characteristics of high microwave heating efficiency, low economic cost, good construction performance and road performance, and can be used for road maintenance and deicing , Pothole rapid repair, asphalt mixture regeneration, etc.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to an asphalt mixture for improving microwave absorption efficiency and a preparation method thereof. Background technique [0002] Road maintenance projects are increasing year by year and are listed as key projects by the road industry. Potholes are also common diseases that are prone to occur frequently in asphalt pavement maintenance. Microwave heating technology, as a new type of environmentally friendly heat energy, is used in the rapid repair of road pavement potholes. It is of great significance to improve road driving comfort and safety, improve road use function and service life, and save road maintenance and operation costs. Microwave heating is used in the regeneration and maintenance of asphalt mixture, which can greatly improve the utilization rate of waste asphalt mixture and add more efficient heating means and methods. [0003] Howeve...

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Problems solved by technology

[0003] However, at this stage, traditional asphalt mixtures have poor microwave absorption and heating effects, and ordinary asphalt mixtures have poor microwave absorption efficiency, resulting in low road maintenance efficiency.

In addition, using microwave heating to heat the ordinary traditional asphalt mixture pavement for maintenance operations will easily cause energy waste and electromagnetic radiation pollution

This limits the popularization and application of microwave heating technology in road maintenance, because the electromagnetic properties of ordinary asphalt mixture are unreasonable for microwave heating.

At present, researchers use artificial metal powder microwave absorbers to improve the electromagnetic parameters of asphalt mixture, but the high cost of artificial metal powder absorbers as road materials restricts the wide-scale application of microwave heating technology for asphalt pavement

[0004] To sum up, at present, the heating efficiency of microwave to ordinary asphalt mixture is low.

Ordinary asphalt mixture is a composite dielectric material with a small dielectric constant. Mineral mixture in ordinary asphalt mixture has less microwave dissipation, and the efficiency of microwave heating asphalt mixture is low, which cannot meet the rapid repair and maintenance of asphalt pavement. requirements

On the other hand, current microwave maintenance devices use magnetron microwave heating chambers to directly heat ordinary asphalt mixture pavement, which cannot guarantee heating in metal enclosed spaces, which may easily cause microwave radiation leakage, which affects the safety and security of high-power microwave maintenance devices. Reliability is difficult to guarantee

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