Liu Quantao, Chen Cheng, Li Bin, Sun Yihan, Li Hechuan
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China.
National & Local Joint Engineering Laboratory for Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China.
Materials (Basel). 2018 May 29;11(6):913. doi: 10.3390/ma11060913.
This paper investigates the heating characteristics and induced healing efficiencies of asphalt mixture containing steel fiber under induction heating and microwave heating. The heating characteristics of an asphalt mixture with different heating methods were studied with an infrared camera. The healing performance of the asphalt mixture specimens in different healing conditions were investigated by observing the crack closure and testing the fracture resistance recovery after healing. The results showed that the heating speed at the surface of asphalt mixture with induction heating was much higher than that with microwave machine heating, under a similar output power and the same method of radiation. While the temperature distribution within the asphalt mixture under induction heating was quite uneven, microwave heating resulted in a more uniform temperature distribution. The effective heating depth of microwave heating is much higher than that of induction heating. Gradient healing occurred within the sample heated with induction healing, while a uniform healing effect can be achieved with microwave heating.
本文研究了含钢纤维的沥青混合料在感应加热和微波加热下的加热特性及诱导愈合效率。用红外热像仪研究了不同加热方式下沥青混合料的加热特性。通过观察裂缝闭合情况和测试愈合后抗断裂性能的恢复情况，研究了不同愈合条件下沥青混合料试件的愈合性能。结果表明，在相似的输出功率和相同的辐射方式下，感应加热的沥青混合料表面加热速度远高于微波加热。感应加热时沥青混合料内部温度分布很不均匀，而微波加热导致温度分布更均匀。微波加热的有效加热深度远高于感应加热。感应加热的试件内部发生梯度愈合，而微波加热可实现均匀的愈合效果。
