Three-phase composite conductive anti-freezing asphalt mixture and preparation method thereof

Abstract

The invention discloses a three-phase composite conductive anti-freezing asphalt mixture and a preparation method thereof. The three-phase composite conductive anti-freezing asphalt mixture comprises coarse aggregates, fine aggregates, mineral powder and asphalt, and is added with a conductive material which consists of 15-20 percent of graphite, 0.2-0.5 percent of carbon fibers and 15-55 percent of steel slag by weight percent. The preparation method comprises the steps of: screening, crushing and heating the aggregates to 180 DEG C plus or minus 5 DEG C, adding the steel slag and agitating for 85-95s; adding the carbon fibers and agitating for 80-90s; adding matrix asphalt and agitating for 85-95s at 165 DEG C plus or minus 5 DEG C; then adding the filler mineral powder and the graphite and agitating for 85-95s; and finally conducting heat preservation for 1-2h in a drying oven at the temperature being 140-145 DEG C to obtain the three-phase composite conductive anti-freezing asphalt mixture. Snow melting through electric conduction is realized. At the same time, the high-temperature mechanical property and the anti-fatigue durability of the pavement are improved.

Description

technical field [0001] The invention relates to the field of composite conductive phase materials, in particular to the field of three-phase composite conductive antifreeze asphalt mixture. Background technique [0002] At present, asphalt pavement is the main pavement type of expressways in my country, and has been widely used in major roads such as airport runways, bridge deck pavement, expressways, and urban roads, and most of the various pavement projects under construction are also made of asphalt pavement. However, most areas of our country have freezing phenomena in winter, and the problem of seriously affecting road smoothness and driving safety has become increasingly prominent. Snow and ice on the roads in winter will cause the airport to be closed and shut down, the expressway to be restricted and interrupted, and even cause serious traffic accidents, causing huge losses to people's life and property safety and social economy. my country's north-south region has ...

AI Technical Summary

Problems solved by technology

[0006] Concrete conductive technology has been well developed and researched in cement concrete, and it has been proved that it has the potential to become the most economical and effective way to melt ice and snow on roads in the future; at the same time, the application of concrete conductive technology in asphalt concrete is in the technical demonstration and test Exploration has proved that it can be realized. The current problem is how to maximize its electrical properties without damaging the road performance of asphalt concrete, ensure the durability of its road performance and the stability of electrical properties, and meet the requirements of asphalt concrete. Requirements for melting snow and ice on concrete pavement

[0007] However, the conductive asphalt concrete currently used still has problems such as unstable electrical conductivity, poor mechanical properties and fatigue resistance.

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