美国南卡罗莱纳州无纤维橡胶改性OGFC温拌混合料及试验路研究

发布时间：2018-05-29 17:36

本文选题：OGFC路面 + HMA　；参考：《中外公路》2017年01期

【摘要】：该文对美国南卡罗莱纳州两条(开级配沥青混合料)OGFC试验路进行了针对性研究与总结,以确定不掺加纤维是否会对OGFC混合料的性能产生影响。其中一条试验路包含3种OGFC混合料:掺加木质素纤维的热拌沥青混合料(HMA)、未掺纤维而采用废轮胎橡胶粉改性的沥青混合料(GTR),未掺纤维的温拌沥青混合料(WMA);另一条试验路包含两种:HMA、WMA。试验结果表明:(1)不掺加纤维对混合料的析漏损失、渗水率、抗磨耗性、间接拉伸强度和抗疲劳强度并未产生不利影响;(2)虽然没有掺加木质素纤维,采用温拌技术生产的温拌沥青混合料的抗疲劳强度仍然高于HMA混合料;(3)温拌沥青混合料可能会减少摊铺初始阶段(可流动的沥青混合料首先通过冷的材料传送装置,然后到达冷的摊铺装置)的热量损失,而较低的热量损失能够改善摊铺初始位置横向冷接缝附近OGFC面层的密度稳定性,从而可能改善路面性能。
[Abstract]:In this paper, two open graded asphalt mixture (OGFC) test roads in South Carolina, USA, are studied and summarized to determine whether the fiber addition will affect the performance of OGFC mixture. One of the test roads contains three kinds of OGFC mixture: a hot-mixed asphalt mixture with lignin fiber, a bituminous mixture modified with waste tire rubber powder without fiber, a warm-mixed asphalt mixture with no fiber, and another one. The trial road consists of two types: HMA WMA. The test results show that the leakage loss, water permeability, wear resistance, indirect tensile strength and fatigue strength of the mixture without adding fiber have no adverse effect on the mixture. The fatigue strength of warm mix asphalt mixture produced by warm mixing technology is still higher than that of HMA mixture.) warm mix asphalt mixture may reduce the initial stage of spreading (the mobile asphalt mixture first passes through cold material transfer device, The lower heat loss can improve the density stability of the OGFC surface near the transverse cold joint in the initial position of the paving, which may improve the pavement performance.
【作者单位】：中国石油天然气管道工程有限公司;
【分类号】：U414

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