Abstract
In order to solve the problems of the 2.45 GHz magnetron used in asphalt pavement maintenance as the longer heating time and high energy consumption when heating unit area, the paper brings forward the 5.8 GHz magnetron using in asphalt pavement maintenance. CST and ANSYS simulation software were first used to study the temperature rise and depth of heating asphalt pavement using 2.45 GHz and 5.8 GHz magnetron. Then the experimental verification was carried through. The 5.8 GHz magnetron can be used effectively in asphalt pavement maintenance. The research results show that: the temperature rising rate of the 5.8 GHz magnetron heating asphalt pavement is 2–3 times of 2.45 GHz magnetron in the distance within 0–75 mm of the asphalt concrete pavement. Heating 8–10 minutes, temperature rise within 0–75 mm of asphalt pavement can meet the asphalt road surface maintenance. The heating asphalt pavement depth of 5.8 GHz magnetron which is about 7 cm–8 cm is half of the 2.45 GHz magnetron. Heating the same area of asphalt pavement to the same temperature, the input power of 5.8 GHz magnetron maintenance equipment is 1/3 of the 2.45 GHz magnetron maintenance equipment.
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