Abstract

Filler, as a component of hot mix asphalt, has an important role in improving the mechanical properties and extending the lifespan of asphalt. This research is conducted to evaluate the use of ceramic waste as filler and its effect on the mechanical properties of asphalt. For this purpose, ceramic waste powder was replaced with conventional limestone filler at 25%, 50%, 75%, and 100% proportions. Marshall stability, moisture sensitivity, four-point bending fatigue, and wheel track tests were used to investigate the effect of ceramic waste on asphalt performance. The results indicated that the Marshall stability was enhanced in all replacement ratios of the ceramic (23% increment for the maximum rate of substitution). Also, the resistance of the asphalt to moisture improved by approximately 5% after using 100% ceramic waste powder. In addition, the results showed that this rate of substitution as filler of HMA increased the fatigue life (approximately 600 cycles more than control specimens) and rutting resistance (reduction of almost 31% of the rut depth). Therefore, this waste material first improved the mechanical properties of HMA, and can also be used as a suitable approach for recycling this waste material.

Graphic abstract

摘要

填料是热拌沥青的组成部分，对改善机械性能和延长沥青的使用寿命具有重要作用。进行这项研究以评估陶瓷废料作为填料的用途及其对沥青力学性能的影响。为此，用25％，50％，75％和100％的比例的常规石灰石填料代替了陶瓷废粉。马歇尔稳定性，湿度敏感性，四点弯曲疲劳和轮迹测试用于研究陶瓷废料对沥青性能的影响。结果表明，在所有的陶瓷置换率下，马歇尔稳定性都得到了提高（最大置换率提高了23％）。同样，在使用100％的陶瓷废粉后，沥青的耐湿性提高了约5％。此外，结果表明，作为HMA填料的这种替代率可延长疲劳寿命（比对照样品多600个循环）和抗车辙性（降低车辙深度近31％）。因此，这种废料首先改善了HMA的机械性能，也可以用作回收这种废料的合适方法。

图形摘要