Enhanced heat release and self-healing properties of steel slag filler based asphalt materials under microwave irradiation
Enhanced heat release and self-healing properties of steel slag filler based asphalt materials under microwave irradiation
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微波辐射下钢渣填料基沥青材料的增强放热和自修复性能
DOI：
10.1016/j.conbuildmat.2018.10.193
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发表时间：
2018-12-30
影响因子：
7.4
通讯作者：
Xiao, Yue
中科院分区：
文献类型：
--
作者：
Li, Chao;Wu, Shaopeng;Xiao, Yue
研究了钢渣填料替代石灰石填料提高沥青胶浆热释放和自修复性能的可行性。LF和SSF首先分别与纯沥青混合，填料与沥青的体积比为0.2，0.4和0.6。研究了不同沥青胶浆在微波辐射下的升温速率和自愈合性能。最后，根据填料的电磁参数和结构特点，分析了填料的加热机理。结果表明，粉胶体积比为0.2、0.4、0.6的SSF沥青胶料的平均升温速率分别比LF沥青胶料高35.89%、51.22%和62.83%;从复模量、疲劳寿命和耗能等方面来看，SSF基沥青玛蹄脂的愈合指标分别比LF基沥青玛蹄脂高39.99%、10.15%和5.82%。SSF基沥青胶料由于具有较高的电磁参数和多孔结构，可以将微波辐射的能量转化为比LF基沥青胶料更多的热能。(C)2018爱思唯尔有限公司版权所有
This paper aims to study the application feasibility of steel slag filler (SSF) to replace limestone filler (LF) to enhance heat release and self-healing properties of asphalt mastics. LF and SSF were firstly mixed with pure bitumen separately by filler-bitumen volume ratios of 0.2, 0.4 and 0.6. Then heating rates and self-healing properties of different asphalt mastics under microwave irradiation were characterized. Finally, heating mechanism based on the electromagnetic parameters and structure features of filler was analyzed. Results demonstrate that the average heating rates of SSF based asphalt mastics with 0.2, 0.4, 0.6 filler-bitumen volume ratio are 35.89%, 51.22% and 62.83% higher than those of LF asphalt mastics. Moreover, healing indexes of SSF based asphalt mastic are 39.99%, 10.15% and 5.82% higher than those of LF asphalt mastic from the perspectives of complex modulus, fatigue life and dissipated energy. Due to higher electromagnetic parameters and porous structure, SSF based asphalt mastics could convert energy of microwave irradiation into more thermal energy than LF based asphalt mastics. (C) 2018 Elsevier Ltd. All rights reserved.