Vol. 19

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Microwave Absorbing Characteristics of Asphalt Mixes with Carbonyl Iron Powder

By Zhenjun Wang, Peng Zhao, Tao Ai, Guanying Yang, and Qiong Wang
Progress In Electromagnetics Research M, Vol. 19, 197-208, 2011


Power microwave was adopted to heat asphalt mixes with carbonyl iron powder (CIP) by its microwave absorbing characteristics. The Arch reflectivity system was employed for reflectivity tests in the frequency range of 2.0~4.0 GHz, and road properties of the asphalt mixes with different heating techniques were studied. The results indicate that 30 mm thickness of the asphalt mixes with the ratio of CIP absorber to asphalt 0.1 : 1.5, can effectively absorb microwave with a -19.1 dB absorbing peak at 2.45 GHz frequency. Microwave heating rate for asphalt mixes with CIP is 16 times higher than that for ordinary asphalt mixes. Microwave heating can enhance road properties of the asphalt mixes, such as Marshall stability, flow value, dynamic stability and splitting strength at low temperature to a certain extant when the ratio of CIP absorber to asphalt is from 0.1 : 1.5 to 0.3 : 1.5.


Zhenjun Wang, Peng Zhao, Tao Ai, Guanying Yang, and Qiong Wang, "Microwave Absorbing Characteristics of Asphalt Mixes with Carbonyl Iron Powder," Progress In Electromagnetics Research M, Vol. 19, 197-208, 2011.


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