Initial Self-Healing Temperatures of Asphalt Mastics Based on Flow Behavior Index.
Initial Self-Healing Temperatures of Asphalt Mastics Based on Flow Behavior Index.
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基于流动行为指数的沥青玛蹄脂初始自愈温度
DOI：
10.3390/ma11060917
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发表时间：
2018-05-29
期刊：
影响因子：
--
通讯作者：
Xiao Y
中科院分区：
文献类型：
--
作者：
Li C;Wu S;Tao G;Xiao Y
提高温度是加速沥青自愈合过程的一种简便方法。然而，沥青在较低温度下可能无法实现愈合能力，并且如果温度过高则可能老化。此外，沥青与矿物填料混合，在沥青混凝土中形成沥青玛蹄脂，因此从沥青玛蹄脂的角度研究初始自愈合更准确。本研究的主要目的是探讨沥青玛蹄脂的起始自愈合温度，这是由流动特性得到的流动行为指数确定的。首先分析了两种填料的结构和几何特征，然后通过流动性指数确定了9种沥青玛蹄脂、纯沥青（PB）和苯乙烯-丁二烯-苯乙烯（SBS）改性沥青的初始自愈合温度。结果表明，石灰石填料（LF）的灰度纹理值的平均标准差比钢渣填料（SSF）低21.24%，说明钢渣填料具有更好的颗粒分布和几何特征。另外，具有0.2、0.4和0.6 LF-PB体积比的沥青胶浆的初始自愈合温度为46.5 °C、47.2 °C和49.4 °C，其比具有SSF-PB的沥青胶浆高1.4 °C、0.8 °C和0.4 °C，但由于SBS独特的结构和性能，不适合于含SBS改性沥青的沥青玛蹄脂的评价。
Increasing temperature is a simple and convenient method to accelerate the self-healing process of bitumen. However, bitumen may not achieve the healing capability at lower temperature, and may be aged if temperature is too high. In addition, the bitumen is mixed with mineral filler and formed as asphalt mastic in asphalt concrete, so it is more accurate to study the initial self-healing from the perspective of asphalt mastic. The primary purpose of this research was to examine the initial self-healing temperature of asphalt mastic, which was determined by the flow behavior index obtained from the flow characteristics. Firstly, the texture and geometry characteristics of two fillers were analyzed, and then the initial self-healing temperature of nine types of asphalt mastic, pure bitumen (PB) and styrene-butadiene-styrene (SBS) modified bitumen were determined by the flow behavior index. Results demonstrate that the average standard deviation of gray-scale texture value of limestone filler (LF) is 21.24% lower than that of steel slag filler (SSF), showing that the steel slag filler has a better particle distribution and geometry characteristics. Also the initial self-healing temperatures of asphalt mastics with 0.2, 0.4 and 0.6 LF-PB volume ratio are 46.5 °C, 47.2 °C and 49.4 °C, which are 1.4 °C, 0.8 °C and 0.4 °C higher than that of asphalt mastics with SSF-PB, but not suitable for the evaluation of asphalt mastic contained SBS modified bitumen because of unique structure and performance of SBS.
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影响因子：
7.4
作者：
García-Morales, M;Partal, P;Muñoz, ME
通讯作者：
Muñoz, ME
影响因子：
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作者：
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影响因子：
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通讯作者：
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影响因子：
7.4
作者：
Sun, Yihan;Wu, Shaopeng;Ye, Qunshan
通讯作者：
Ye, Qunshan