Chen Nian, Wang Huan, Liu Quantao, Norambuena-Contreras Jose, Wu Shaopeng
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Materials and Manufacturing Research Institute, Department of Civil Engineering, Faculty of Science and Engineering, Swansea University, Swansea SA1 8EN, UK.
Polymers (Basel). 2024 Aug 24;16(17):2408. doi: 10.3390/polym16172408.
Conventional asphalt roads are noisy. Currently, there are two main types of mainstream noise-reducing pavements: pore acoustic absorption and damping noise reduction. However, a single noise reduction method has limited noise reduction capability, and porous noise-reducing pavements have a shorter service life. Therefore, this paper aimed to improve the noise-damping performance of porous asphalt mixture by adding rubber granules and extending its service life using electromagnetic induction heating self-healing technology. Porosity and permeability coefficient test, Cantabro test, immersion Marshall stability test, freeze-thaw splitting test, a low-temperature three-point bending experiment, and Hamburg wheel-tracking test were conducted to investigate the pavement performance and water permeability coefficients of the mixtures. A tire drop test and the standing-wave tube method were conducted to explore their noise reduction performance. Induction heating installation was carried out to study the heating rate and healing performance. The results indicated that the road performance of the porous asphalt mixture tends to reduce with an increasing dosage of rubber granules. The road performance is not up to the required standard when the dosage of rubber granules reaches 3%. The mixture's performance of damping and noise tends to increase with the increase of rubber granule dosage. Asphalt mixtures with different rubber granule dosages have different noise absorption properties, and the mixture with 2% rubber granules has the best overall performance (a vibration attenuation coefficient of 7.752 and an average absorption factor of 0.457). The optimum healing temperature of the porous asphalt mixture containing rubber granules and steel wool fibers is 120 °C and the healing rate is 74.8% at a 2% rubber granule dosage. This paper provides valuable insights for improving the noise reduction performance and service life of porous asphalt pavements while meeting road performance standards.
传统沥青道路噪音大。目前，主流的降噪路面主要有两种类型：孔隙吸声和阻尼降噪。然而，单一的降噪方法降噪能力有限，且多孔降噪路面使用寿命较短。因此，本文旨在通过添加橡胶颗粒来提高多孔沥青混合料的降噪性能，并采用电磁感应加热自修复技术延长其使用寿命。进行了孔隙率和渗透系数试验、坎塔布罗试验、浸水马歇尔稳定度试验、冻融劈裂试验、低温三点弯曲试验和汉堡轮辙试验，以研究混合料的路面性能和透水系数。进行了轮胎跌落试验和驻波管法试验，以探究其降噪性能。进行了感应加热装置试验，以研究加热速率和修复性能。结果表明，多孔沥青混合料的路用性能随橡胶颗粒掺量的增加而趋于降低。当橡胶颗粒掺量达到3%时，路用性能达不到要求标准。混合料的阻尼和降噪性能随橡胶颗粒掺量的增加而趋于增强。不同橡胶颗粒掺量的沥青混合料具有不同的吸声性能，橡胶颗粒掺量为2%的混合料综合性能最佳（振动衰减系数为7.752，平均吸声系数为0.457）。含橡胶颗粒和钢纤维的多孔沥青混合料的最佳修复温度为120℃，橡胶颗粒掺量为2%时修复率为74.8%。本文为在满足道路性能标准的同时提高多孔沥青路面的降噪性能和使用寿命提供了有价值的见解。
