To analyze the potential utilization of bio-oil cutback asphalt (BCA) as an innovative permeable material, this study comprehensively evaluated the road performance of BCA. Infrared spectroscopy and fluorescence microscopy were employed to characterize the components' interaction mechanisms and storage stability within the BCA. The research also involved assessments of interlayer strength, unconfined compressive strength, and dynamic water scouring trials of the base layer. Subsequently, a comprehensive assessment of the road performance of BCA was carried out in conjunction with its application on the indoor test section. The microscopic test results revealed that bio-oil and the penetrant primarily enhanced the asphalt's flow and penetration properties through physical blending. Even after 28 days of storage, no phase separation occurred among the constituents in the BCA. Compared to conventional prime coat materials, the specimens treated with BCA demonstrated notably higher interlayer pull-off and shear strengths at the optimal sprinkling volume. Furthermore, applying BCA to the cement-treated base improved its early strength and erosion resistance. As a result, BCA plays a crucial role in enhancing the structural integrity of asphalt pavements with semi-rigid base layers.

中文翻译：

---

评估半刚性基层沥青路面底漆的生物油稀释沥青：实验室实验和室内试验段应用

为了分析生物油稀释沥青（BCA）作为一种创新透水材料的潜在用途，本研究全面评估了 BCA 的道路性能。采用红外光谱和荧光显微镜来表征 BCA 内各成分的相互作用机制和储存稳定性。该研究还涉及层间强度、无侧限抗压强度和基层动态水冲刷试验的评估。随后结合BCA在室内测试路段的应用，对BCA的道路性能进行了全面评估。微观测试结果表明，生物油和渗透剂主要通过物理混合来增强沥青的流动和渗透性能。即使储存 28 天后，BCA 中的成分之间也没有发生相分离。与传统的底漆材料相比，经过 BCA 处理的样本在最佳喷洒量下表现出明显更高的层间拉脱强度和剪切强度。此外，将BCA应用于水泥处理的基层可提高其早期强度和抗侵蚀性。因此，BCA 在增强半刚性基层沥青路面的结构完整性方面发挥着至关重要的作用。