The objective of this study is to evaluate the effects of adding rock wool fibres on the improvement in the dynamic properties of the hot mix asphalt. To this aim, the effects of 0.2, 0.4, 0.6, and 0.8 of percent rock wool fibres by weight of mixture on the dynamic properties of asphalt mixtures were evaluated. Accordingly, indirect tensile stiffness modulus, indirect tensile fatigue and repeated load axial tests were performed to measure the stiffness modulus, fatigue life and rutting resistance of asphalt mixtures. The fatigue life of modified mixtures with different concentrations of rock wool increased 4%, 32%, 35% and 65% at 25 °C with regard to control, respectively. Furthermore, adding 0.8% of Rockwool resulted in 84% and 130% increased in resistance to permanent deformation at the stress of 150 kPa and 300 kPa, respectively. Consequently, incorporation of rock wool in asphalt mixture can be beneficial as it enhances the performance of road pavements against distresses such as rutting and fatigue cracking.

中文翻译：

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含岩棉热拌沥青的疲劳和车辙行为评价

本研究的目的是评估添加岩棉纤维对改善热拌沥青混合料动态性能的影响。为此，评估了按混合物重量计 0.2、0.4、0.6 和 0.8% 的岩棉纤维对沥青混合物动态性能的影响。因此，进行了间接拉伸刚度模量、间接拉伸疲劳和重复载荷轴向试验，以测量沥青混合料的刚度模量、疲劳寿命和抗车辙性能。与对照相比，不同浓度岩棉的改性混合物在25℃时的疲劳寿命分别提高了4%、32%、35%和65%。此外，添加 0.8% 的岩棉在 150 kPa 和 300 kPa 应力下的抗永久变形能力分别提高了 84% 和 130%。最后，