A simple model to define induction heating in asphalt mastic
A simple model to define induction heating in asphalt mastic
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DOI：
10.1016/j.conbuildmat.2011.12.046
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发表时间：
2012-06-01
影响因子：
7.4
通讯作者：
Liu, Quantao
中科院分区：
文献类型：
--
作者：
Garcia, Alvaro;Schlangen, Erik;Liu, Quantao
众所周知，乳香是一种自愈材料，其自愈率受温度影响很大。在[1]中表明，可以使胶粘剂导电并对其进行感应加热。此外，在[2]中表明，活化能可用于通过阿伦尼乌斯方程计算沥青玛蹄脂的愈合时间。如果可以预测温度随时间的增加，则可以计算获得完全恢复所需的感应加热时间。但感应加热沥青玛蹄脂的温升取决于多种参数，例如环境温度、输出电流和材料电阻。为此，本文提出了一个简单的等效电路来表示通过感应能加热的导电胶泥的热流方程。导出一组微分方程来计算胶泥表面的平衡温度。此外，通过最小二乘法推导了一种感应加热混合物的模型参数，该混合物的温度是用红外热像仪测量的。最后，沥青玛蹄脂中的主要感应加热机制已经在纤维和沥青箔中被识别和可视化，通过感应加热温度已经升高，并且结果与[1]中所示的结果进行了比较。 (C) 2011 Elsevier Ltd. 保留所有权利。
It is well known that mastic is a self-healing material and that its self-healing rates are highly influenced by temperature. In [1] it was shown that it is possible to make mastic conductive and to induction-heat it. Additionally, in [2] it was shown that activation energy can be used to calculate the healing times of asphalt mastic through the Arrhenius equation. If the increase of temperature with time could be predicted, the necessary induction heating time to obtain a complete recovery can be calculated. But temperature rise in asphalt mastic through induction heating, depends on a variety of parameters such as ambient temperature, output current and material resistance. For this reason, this paper presents a simple equivalent circuit to represent the thermal heat flow equations for conductive mastic, heated though induction energy. A set of differential equations is derived to calculate the equilibrium temperatures in the mastic surface. Moreover, the model parameters have been derived through the least square method for one induction-heated mixture, which temperature was measured with an infrared camera. Finally, the main induction heating mechanisms in asphalt mastic have been identified and visualized in a foil of fibers and bitumen, which temperature has been increased though induction heating and the results have been compared to those shown in [1]. (C) 2011 Elsevier Ltd. All rights reserved.