Heat-insulating bituminous mixture for roads and production method thereof

Abstract

The invention discloses a heat-insulating bituminous mixture for roads, which comprises the following materials in percentage by volume: 26 and 49 percent of limestone aggregate, 31 to 37 percent of porous basalt aggregate, 11 to 23 percent of coal ash floating bead, 1 to 4 percent of limestone mineral powder and 8 to 10 percent of SBS modified oil asphalt. The production method comprises the steps of: drying the limestone aggregate, the porous basalt aggregate, the coal ash floating bead with 0.15 and 0.075 millimeter, the limestone mineral powder, and the coal ash floating bead of less than 0.075 millimeter at 185 DEG C for 24 hours; mixing the limestone mineral powder and the coal ash floating bead of less than 0.075 millimeter in a proportion, and mixing the mixture and the SBS modified oil asphalt at 170 DEG C for uniform stirring; and adding the limestone aggregate, the porous basalt aggregate and the coal ash floating bead with 0.15 and 0.075 millimeter into the mixture for uniform stirring. The heat-insulating bituminous mixture has the heat-insulating function, and can prevent heat from transferring in structures of bituminous pavements and improve the service life of the pavements.

Description

technical field [0001] The invention relates to an asphalt mixture used for road paving, in particular to a road asphalt mixture with heat insulation function and a production method thereof. Background technique [0002] Asphalt mixture is a material that is very sensitive to temperature. Changes in the external environment cause unstable heat flow in the pavement structure, which constitutes the temperature field of the pavement structure. Due to the difference in temperature-sensing properties of layered pavement materials, the mutual constraints between the various structural layers, and the constraints along the route direction of the long and narrow pavement body, temperature stress is generated in the pavement body. For asphalt mixture, the change of temperature will lead to a big difference in its performance, and the damage mode in different temperature ranges is very different: in the low temperature range, the damage of asphalt pavement is mainly due to the rapid ...

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Problems solved by technology

According to statistics, the highest temperature in some areas of our country in summer is above 40°C. When asphalt mixture is used as the pavement surface layer, its internal temperature can be as high as 60°C. performance decline and asphalt aging acceleration, greatly reducing the service life of the pavement

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