Recently, foam concrete (FC) has been widely considered due to higher workability, lightweight, lower cost, thermal and fire resistance relatively to conventional concrete. This study intends to measure the properties of FC incorporating bottom ash (BA) as fine aggregates (FA) and polypropylene fibers (PPF). A total of 18 concrete mixes were produced with two cement contents: 300 and 400 kg/m³. In addition, three foam agent contents (40, 50, and 60 kg/m³) and three PPF contents (0, 0.5, and 1% in terms of volume) were used and considered to investigate the physical, mechanical, thermal, and durability properties of PPF-reinforced FC incorporating BA. Furthermore, the effect of elevated temperature on the properties of specimens was also examined. Results show an increase in apparent porosity, water absorption, and sorptivity of FC with the increase in foam agent content. Conversely, a reduction in thermal conductivity, porosity, and shrinkage is observed with an increase in foam agent, cement, and PPF contents, respectively. The rise in foam agent content declines the mass loss while improves both compressive and flexural strengths of FC under an elevated temperature. Scanning electron microscopic (SEM) analysis of the FC specimens after exposure to the elevated temperature shows the cracks and inter-connected pores due to the thermal stresses by decomposing calcium silicate phases. Results show that all the FC mixes incorporating BA as FA and PPF can be used as moderate-strength concrete following American Concrete Institute guidelines, leading to enhanced FC performance and sustainable construction.

最近，泡沫混凝土（FC）由于与传统混凝土相比具有更高的和易性、重量轻、成本更低、耐热和耐火等优点而被广泛考虑。本研究旨在测量将底灰 (BA) 作为细骨料 (FA) 和聚丙烯纤维 (PPF) 结合在一起的 FC 的性能。总共生产了 18 种混凝土混合物，其水泥含量有两种：300 和 400 kg/m ³。此外，三种发泡剂含量（40、50 和 60 kg/m ³) 和三种 PPF 含量（按体积计为 0、0.5 和 1%），并考虑研究包含 BA 的 PPF 增强 FC 的物理、机械、热和耐久性特性。此外，还检查了高温对试样性能的影响。结果表明，随着发泡剂含量的增加，FC 的表观孔隙率、吸水率和吸着性增加。相反，随着发泡剂、水泥和 PPF 含量的增加，分别观察到热导率、孔隙率和收缩率降低。发泡剂含量的增加降低了质量损失，同时提高了 FC 在高温下的压缩和弯曲强度。暴露于高温后的 FC 样品的扫描电子显微镜 (SEM) 分析显示，由于硅酸钙相分解，热应力导致裂纹和相互连接的孔隙。结果表明，所有包含 BA 作为 FA 和 PPF 的 FC 混合物都可以用作符合美国混凝土协会指南的中等强度混凝土，从而提高 FC 性能和可持续建筑。