Modified asphalt concrete with road surface cooling function

Abstract

The invention discloses modified asphalt concrete with a road surface cooling function. The modified asphalt concrete is prepared by following raw materials of, by weight, 100 parts of mineral aggregate, 3-9 parts of asphalt, 0.5-3 parts of tourmaline, 0-1 part of expanded perlite and 0-0.06 part of auxiliary agents, wherein the tourmaline is tourmaline powders and / or tourmaline negative ion powders, and the auxiliary agents are silane coupling agents or titanate coupling agents. According to the modified asphalt concrete with the road surface cooling function, excellent characteristics of the tourmaline are used, the tourmaline can convert thermal energy into other energy of electric energy and the like through an energy conversion theory and reduce internal temperatures of the asphalt concrete; and on the other side, the expanded perlite has heat preservation effects so that the thermal conductivity of the asphalt concrete can be reduced, and the asphalt concrete can not be influenced by external high-temperature environment; and under high temperature conditions, temperatures of road surfaces using the modified asphalt concrete are obviously lower than those of traditional asphalt concrete road surfaces.

Description

technical field [0001] The invention belongs to the technical field of road materials, and in particular relates to a modified asphalt concrete with the function of cooling the road surface. Background technique [0002] At present, the pavement structure of urban roads in my country is basically asphalt pavement. As a heat-absorbing material, asphalt has a heat absorption rate of 0.85 to 0.95 for sunlight, which leads to an overheating of the asphalt pavement. For example, when the highest temperature in summer can reach above 35°C-40°C, under continuous sunlight, a large amount of heat is absorbed by the asphalt pavement and accumulated in the asphalt pavement layer, and the temperature of the asphalt pavement can reach 63°C-68°C. The high temperature of asphalt concrete pavement in urban roads aggravates the "heat island effect" in the city, and at the same time, the high temperature causes the bearing capacity of asphalt concrete to decrease, resulting in serious ruttin...

AI Technical Summary

Problems solved by technology

Engineering practice has proved that the application of these technologies cannot fundamentally solve the problem of rutting and slow down the urban heat island effect

In recent years, some scholars have carried out research on road cooling materials. Although the technology of coating a layer of cooling materials on the surface of asphalt concrete roads can achieve certain effects, there are still many problems, such as: (1) The coating used often costs Higher, will increase the project investment; (2) There are many chemical raw materials in the coating formula, and most of them are toxic materials, which are easy to pollute the surrounding environment; (3) The formula process is complicated, causing inconvenience in construction; (4) Durable use Poor performance, affecting the performance of asphalt pavement, and slowing down the service life of asphalt pavement; (5) low reuse rate, non-recyclable, non-recyclable, poor sustainability; (6) affecting pavement performance, easy to affect road surface skid resistance, water (7) Increase the road construction process, causing construction inconvenience and increasing construction costs

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