A kind of microwave-assisted regeneration material and preparation method thereof

Abstract

The invention belongs to a road material maintenance and regeneration agent, in particular to a microwave-assisted regeneration material and a preparation method thereof. Calculated according to the parts by weight, the invention includes 5-20 parts of a microwave sensitizer and 80-95 parts of a reduction and regeneration agent; the microwave sensitizer is two parts by weight. A mixture of any one or more of manganese oxide nanopowder, iron tetroxide nanopowder or graphite. The microwave-assisted regeneration material provided by the present invention has excellent wave absorption and heat transfer performance, so that the microwave heating uniformity is good, the microwave heating efficiency can be significantly improved, and the poor heating uniformity caused by the traditional in-situ heat regeneration technology when applied in a large area is avoided. , the serious problem of asphalt aging.

Description

technical field [0001] The invention belongs to the field of road materials, relates to auxiliary materials for road maintenance, in particular to a microwave-assisted regeneration material and a preparation method thereof. Background technique [0002] Hot-in-place recycling technology is an important technical means for highway pavement maintenance because it can recycle 100% of the old asphalt pavement RAP material, and the construction progress is fast, the cycle is short, and the impact on traffic is relatively small. [0003] However, the traditional heat-in-place regeneration technology has the following problems: 1. The heating temperature of the road surface is too high, usually above 180 °C, which is easy to cause secondary aging of the old asphalt, and the high temperature during the heating process will release toxic blue smoke. The environmental pollution is relatively large; ② Asphalt material is a poor conductor of heat, the heat penetration rate is slow, and ...

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Problems solved by technology

[0003] However, the traditional hot-in-place regeneration technology has the following problems: ①The heating temperature of the road surface is too high, usually above 180°C, which will easily cause secondary aging of the old asphalt, and the toxic blue smoke will be released during the heating process. The environmental pollution is relatively large; ②Asphalt material is a poor conductor of heat, the heat penetration rate is slow, and the temperature rise gradient is large; ③The heated asphalt pavement is exposed to the air, and the heat loss speed is fast; ④The temperature at the bottom of the surface is insufficient. It is easy to cause gradation refinement; ⑤ uneven heating temperature of the pavement may easily cause insufficient local compaction, thus affecting the quality of pavement regeneration

[0005] However, at present, microwave in-situ heat regeneration technology is mainly used in small-area occasions such as pothole repair and crack treatment. For large-area heat-in-place regeneration projects, there are problems of high energy consumption per unit heating area and low heating efficiency.

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