Composite asphalt cooling pavement top layer and construction method thereof

Abstract

The invention belongs to the field of asphalt concrete pavements and relates to a composite asphalt cooling pavement top layer and a construction method thereof. The construction method comprises following steps: S1, a thermal-resistant asphalt mixture is spread on the top layer of a pavement and then rolled; S2, after the thermal-resistant asphalt mixture rolled in S1 is cured, the upper surface of the thermal-resistant asphalt mixture is coated with a coating; S3, after the thermal-resistant asphalt mixture and the coating are cured, the composite asphalt cooling pavement top layer is formed. Pavement ruts, the urban heat island effect and permafrost subgrade defects can be overcome.

Description

technical field [0001] The invention belongs to the field of asphalt concrete pavement, and relates to a composite asphalt cooling pavement upper layer and a construction method thereof. Background technique [0002] At the end of 2015, the total mileage of national highways was 4.5773 million kilometers, of which 123,500 kilometers were open to traffic on highways; the total mileage of urban roads was 365,000 kilometers, and the total road area was 7.18 billion square meters; the total area of ​​permafrost areas was about 2.15 million square kilometers. During the 13th Five-Year Plan period, the national expressway mileage will increase by 46,000 kilometers, and by the end of the 13th Five-Year Plan period, the expressway mileage will reach 169,000 kilometers; the average growth rate of the total mileage and total area of ​​urban roads in the past five years will be 4.43 respectively. % and 6.63%. Statistics show that asphalt pavement accounts for about 93% of U.S. highway...

AI Technical Summary

Problems solved by technology

However, some studies have shown that although the thermal resistance cooling pavement can reduce the heat transfer to the interior of the pavement and reduce the internal temperature of the pavement, it will also cause a large amount of heat to accumulate on the pavement surface and increase the temperature of the pavement surface, resulting in the function of resisting rutting and alleviating the "heat island effect". Contradictory situation; most of the reflective fillers today need to rely on their own white color to reflect visible light, but if the white coating is directly applied to the road surface in a large area, it will cause serious glare, making drivers prone to visual fatigue. It leads to an increase in the incidence of traffic accidents. In addition, the reflective pavement seriously reduces the surface function of the pavement, especially the anti-skid performance and is not resistant to abrasion and poor durability.

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