Poroelastic road surface (PERS) is usually composed of rubber particles, aggregates, and polyurethane. However, the poor bonding strength between rubber granules and polyurethane affects PERS’ durability. This study aimed to improve the durability of PERS with treated rubber using molecular simulation and experimental tests. The cohesive energy density (CED), interaction energy (IE) and shear bonding capacities between two kinds of rubber granules and one-component polyurethane were simulated using molecular dynamics (MD). The hydrophilicity test and Fourier transform infrared (FTIR) spectroscopy test were utilized to demonstrate the formation of oxygen-containing groups on rubber surfaces. The indirect tension (IDT) test and Cantabro test were employed to evaluate the durability of PERS mixtures with treated rubber. The MD simulation results showed that the oxygen-containing groups, including the hydroxyl group (-OH) and the carbonyl group (CO), could improve surface polarity of natural rubber (NR) and styrene-butadiene rubber (SBR) and thereby enhance rubber-polyurethane bonding performance. In particular, hydroxyl groups improved the bonding energy of NR-polyurethane by 59% while the carbonyl groups enhanced the bonding performance of SBR-polyurethane by 20%. The hydrophilicity of the treated rubber granules was effectively improved since new carbonyl groups were introduced on rubber surface. The treatment of rubber with NaOH solution improved the durability of PERS specimens by 8.4% in terms of tensile strength ratio (TSR) and 64.7% in terms of Cantabro abrasion loss. These findings prove the feasibility of designing durable PERS with good functional performance.

多孔弹性路面（PERS）通常由橡胶颗粒、骨料和聚氨酯组成。然而，橡胶颗粒与聚氨酯之间的粘合强度较差，影响了PERS的耐用性。本研究旨在通过分子模拟和实验测试提高 PERS 与处理过的橡胶的耐久性。使用分子动力学（MD）模拟了两种橡胶颗粒与单组分聚氨酯之间的内聚能密度（CED）、相互作用能（IE）和剪切粘合能力。这亲水性测试和傅里叶变换红外 (FTIR) 光谱测试用于证明橡胶表面上含氧基团的形成。间接张力 (IDT) 测试和 Cantabro 测试用于评估 PERS 混合物与处理过的橡胶的耐久性。MD模拟结果表明，含氧基团，包括羟基（-OH）和羰基（CO)，可以改善天然橡胶（NR）和丁苯橡胶（SBR）的表面极性，从而提高橡胶-聚氨酯的粘合性能。特别是，羟基将 NR-聚氨酯的键合能提高了 59%，而羰基将 SBR-聚氨酯的键合性能提高了 20%。由于在橡胶表面引入了新的羰基，处理后的橡胶颗粒的亲水性得到有效提高。用 NaOH 溶液处理橡胶后，PERS 试样的抗拉强度比 (TSR) 耐久性提高了 8.4%，Cantabro 磨损损失提高了 64.7%。这些发现证明了设计具有良好功能性能的耐用 PERS 的可行性。