As a functional pavement material with a large number of pores, porous concrete (PC) pavement exhibits a good sound absorption performance. Limited experimental studies focused on the effects of aggregate size, cement to aggregate ratio, and pavement thickness of porous concrete on its sound absorption in a wide range of sound frequencies. Besides, the effects of temperature and humidity on the sound absorption performance of porous concrete are still unclear. In this study, one hundred and thirty-five samples of porous concrete were prepared that consist of three aggregate gradations, three cement to aggregate (C/A) ratios and three thicknesses to investigate the sound absorption property of porous concrete considering the effects of temperature and humidity. These samples were tested at different temperatures (−10, 5, 20, 35 and 50 °C) and with different humidity (dry, inundated and saturated) using impedance tubes method with varied sound frequencies (200–2000 Hz). The results demonstrated that: under the same conditions, the sound absorption property of porous concrete decreases with the increase of aggregate size and cement to aggregate ratio, and increases with the increase of thickness. In addition, the temperature and presence of water have significant effects on the sound absorption property of porous concrete.

作为具有大量孔的功能性路面材料，多孔混凝土（PC）路面具有良好的吸声性能。有限的实验研究集中于多孔混凝土的骨料尺寸，水泥与骨料的比例以及路面厚度对其在各种声频中的吸声性能的影响。此外，温度和湿度对多孔混凝土吸声性能的影响仍不清楚。在这项研究中，制备了135个多孔混凝土样品，这些样品由三个集料级配，三个水泥与集料（C / A）比和三个厚度组成，以考虑温度的影响来研究多孔混凝土的吸声性能。和湿度。这些样品在不同温度下（-10、5、20，35和50°C）和使用不同声频（200–2000 Hz）的阻抗管方法在不同湿度（干燥，淹没和饱和）下进行。结果表明：在相同条件下，多孔混凝土的吸声性能随骨料粒径和水泥骨料比的增加而降低，随厚度的增加而增加。另外，温度和水的存在对多孔混凝土的吸声性能有显着影响。