基于单纤维改性沥青难以均衡提升沥青的综合性能，采用不同尺度和类型的纤维材料制备了混杂纤维改性沥青，期望发挥纤维材料在不同尺度的阻裂作用，提高纤维沥青混凝土的强度和韧性。研究选用玄武岩纤维（basalt fiber, BF）和硫酸钙晶须（calcium sulfate whisker, CSW）制备出混杂纤维改性沥青胶浆，并利用常规物理力学指标综合评价其增强作用，通过极差分析法初步得到混杂纤维的最佳掺量。同时，以光学显微镜分析混杂纤维改性沥青胶浆的微细观改性机理和分散性。研究结果表明，CSW和BF的掺加均大幅降低了基质沥青的锥入度和延度，但改性沥青胶浆的软化点会逐渐升高，提高了改性沥青胶浆的高温稳定性；当CSW掺量为5%，BF掺量为1.0%，BF长度为6 mm时，混杂纤维改性沥青胶浆的物理性能会达到最佳平衡值。光学显微镜测试发现CSW与沥青相容性较好，在沥青胶浆体系内主要起到颗粒增强作用，BF与沥青相容性一般，在胶浆内主要起增强增韧作用。

Given the challenges in uniformly enhancing the comprehensive performance of asphalt through single-fiber modification, this study multi-scale hybrid fibers was employed to develop hybrid fiber-modified asphalt. The objective was to exploit the synergistic crack-resistant mechanisms of diverse fiber materials across varying scales, thereby improving the strength and toughness of fiber-reinforced asphalt concrete. Specifically, basalt fiber (BF) and calcium sulfate whisker (CSW) were selected to fabricate hybrid fiber-modified asphalt mastics. Conventional physical and mechanical tests were conducted to systematically evaluate their reinforcement effects, with the optimal hybrid fiber dosage preliminarily identified through range analysis. Furthermore, optical microscopy was utilized to characterize the microstructural modification mechanisms and dispersion homogeneity within the hybrid fiber-modified asphalt mastics. Results demonstrated that the incorporation of CSW and BF significantly reduced the penetration and ductility of base asphalt while progressively increasing the softening point of modified mastics, indicating enhanced high-temperature stability. The optimal performance balance was achieved at 5% CSW, 1.0% BF (6 mm length). Microscopic analysis revealed distinct reinforcement mechanisms: CSW exhibited superior compatibility with asphalt, functioning as a particulate reinforcement phase, whereas BF demonstrated moderate compatibility, primarily contributing to crack-bridging and toughening effects within the mastic matrix.