【摘要】 为降低交通噪声污染，开发一种高黏度沥青改性剂/丁苯橡胶/热塑性聚氨酯多孔沥青混合料。采用响应面法确定高黏度沥青改性剂/苯橡胶/热塑性聚氨酯复合改性剂的最佳掺配比例，并通过析漏试验、飞散试验和体积法测试空隙率，确定了多孔沥青混合料的最佳沥青用量，基于有限元方法分析混合料的降噪性能。结果表明：高黏度沥青改性剂/苯橡胶/热塑性聚氨酯复合改性剂的最佳复配掺量为7%高黏度沥青改性剂+6%苯橡胶+1%热塑性聚氨酯；目标空隙率为21%高黏度沥青改性剂/苯橡胶/热塑性聚氨酯多孔沥青路面的最佳沥青用量为4.7%；高黏度沥青改性剂/苯橡胶/热塑性聚氨酯多孔沥青路面较AC-13路面噪声降低了3.5 dB，降噪效果显著。更多还原

【Abstract】 To reduce traffic noise pollution, a high-viscosity asphalt modifier(HVA)/styrene-butadiene rubber(SBR)/thermoplastic polyurethane(TPU) composite modified porous asphalt mixture was developed. The response surface methodology was employed to determine the optimal blending ratio of the HVA/SBR/TPU composite modifier. The optimum asphalt content of the porous asphalt mixture was then determined through draindown tests, Cantabro abrasion tests, and volumetric void content measurements. Furthermore, the noise reduction performance of the mixture was analyzed using the finite element method. The results show that the optimal combined dosage of the composite modifier is 7% HVA, 6% SBR, and 1% TPU. For the porous asphalt pavement with a target void content of 21%, the optimum asphalt content is 4.7%. Compared with the conventional AC-13 pavement, the proposed HVA/SBR/TPU modified porous asphalt pavement exhibits a noise reduction of 3.5 dB, demonstrating a significant noise-reducing effect.更多还原