Modified asphalt concrete with road surface cooling function

A technology of modifying asphalt and concrete, which is applied in the field of road materials, can solve the problems of affecting road surface performance, non-recyclable reuse, poor durability, etc., and achieve rich tourmaline mineral resources, reduce driving load damage, and high mechanochemical The effect of stability

Inactive Publication Date: 2013-01-02
CHANGAN UNIV
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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, an...

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  • Modified asphalt concrete with road surface cooling function
  • Modified asphalt concrete with road surface cooling function
  • Modified asphalt concrete with road surface cooling function

Examples

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Effect test

Embodiment 1

[0018] The modified asphalt concrete with road surface cooling function of this embodiment is made of the following raw materials: 100kg of ore material (aggregate containing mineral powder), 4.8kg of asphalt, 0.96kg of tourmaline, 0.24kg of expanded perlite, and 0.02 kg of additives. kg; the tourmaline is negative ion powder with anion release of 5000ions; the asphalt is SBS modified asphalt; the auxiliary agent is silane coupling agent KH550; The best oil-stone ratio is 4.8%.

[0019] The preparation method of the modified asphalt concrete in this example is as follows: add asphalt heated to 150°C to 170°C to aggregate (aggregate in mineral aggregate) at 180°C to 200°C and mix for 90 seconds, and then add electrical Stone, expanded perlite, additives and mineral powder (mineral powder in the mineral material), mixed again for 90-100 seconds, and then through the molding process, asphalt concrete with road surface cooling function can be obtained.

[0020] Table 1 Synthetic ...

Embodiment 2

[0023] The present embodiment is the same as Example 1, wherein the difference is that the asphalt is road petroleum asphalt, coal tar pitch, SBR modified asphalt or rubber modified asphalt; the tourmaline is tourmaline powder or tourmaline powder and tourmaline negative ion powder; the auxiliary agent is a titanate coupling agent.

Embodiment 3

[0025] The modified asphalt concrete with road surface cooling function of the present embodiment is made of the following raw materials: mineral aggregate 100kg, asphalt 4.8kg, tourmaline 0.8kg, expanded perlite 0.1kg, auxiliary agent 0.01kg; described tourmaline is negative ion Negative ion powder with a release rate of 8000 ions; the asphalt is SBS modified asphalt; the auxiliary agent is silane coupling agent KH560; the synthetic gradation of mineral materials is shown in Table 1, and the optimum asphalt ratio is 4.8%.

[0026] The preparation method of the modified asphalt concrete of this embodiment is the same as that of Embodiment 1.

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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...

Claims

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Application Information

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IPC IPC(8): C04B26/26
Inventor 王朝辉李彦伟王鹏赵永祯胡素敏杜群乐杨露王选仓
Owner CHANGAN UNIV
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