This study intends to assess the influence of untreated coal coarse aggregates (UCCA) and polypropylene fibres (PPF) on the thermal and acoustic performance of concrete. 15 concrete mixes were produced with different PPF contents (0%, 1% and 2% in terms of volume) and UCCA contents ranging from 0% to 30% as replacement for natural coarse aggregates (NCA). Hence, different properties of concrete were evaluated, including bulk density, porosity, electrical resistivity, thermal conductivity, thermal resistance and sound absorption, in addition to common fresh- and hardened-state properties of concrete. Moreover, new models are proposed to estimate the mechanical, thermal properties of concrete with different UCCA and PPF contents. It was found that the incorporation of both UCCA and PPF substantially improved the sound insulation and noise reduction behaviour of concrete. For example, the frequency of 2000 Hz can be absorbed when 30% NCA is replaced with UCCA and 2% PPF are also added, with an absorption coefficient of 67%.

这项研究旨在评估未经处理的煤粗骨料（UCCA）和聚丙烯纤维（PPF）对混凝土的热和声性能的影响。生产了15种具有不同PPF含量（按体积计分别为0％，1％和2％）和UCCA含量为0％至30％的混凝土混合物，以代替天然粗骨料（NCA）。因此，除了普通的新鲜和硬化状态特性外，还评估了混凝土的不同特性，包括堆积密度，孔隙率，电阻率，导热系数，热阻和吸声性能。此外，提出了新的模型来估算具有不同UCCA和PPF含量的混凝土的机械，热性能。发现UCCA和PPF的掺混大大改善了混凝土的隔音和降噪性能。例如，当用UCCA代替30％的NCA和添加2％的PPF时，可以吸收2000 Hz的频率，吸收系数为67％。