淤泥作为一种城市固废, 因其含有一定的火山灰活性, 常被用作辅助胶凝材料。同时, 过氧化氢能够和淤泥中的部分成分如碳酸盐发生反应, 固化淤泥的同时生成气体, 能够在泡沫混凝土中起到发泡作用。本研究将淤泥应用于泡沫混凝土改性, 探究了不同活化方式和掺量下淤泥改性泡沫混凝土的性能。本研究评估了淤泥改性泡沫混凝土的抗压强度、吸水率和孔隙率, 并利用TOPSIS法对其进行评价, 以获得合适的淤泥掺量和活化方式。试验结果表明, 淤泥改性泡沫混凝土的抗压强度随着淤泥掺量的增加而下降。煅烧和球磨均能有效提升抗压强度, 且煅烧的提升效果更为明显。吸水率随淤泥掺量的提高和活化方式的增加而略有上升, 从32%提升至37%。伴随着活化方式从仅球磨到“两磨一烧”, 淤泥改性泡沫混凝土的机械性能得到了提升, 但发泡效果发生了下降。综合考虑抗压强度、吸水率强度和发泡效果, 10%淤泥掺量下, 煅烧后不经球磨的淤泥平衡了淤泥对强度和孔隙的影响, 获得了最佳的综合性能。

Sludge, a type of urban solid waste, is commonly used as an auxiliary cementitious material due to its inherent volcanic ash activity. Furthermore, hydrogen peroxide can react with certain components in the sludge, such as carbonates, solidifying the sludge while generating gas, which can act as a foaming agent in foam concrete. This study explores the performance of sludge-modified foam concrete under different activation methods and sludge content. The compressive strength, water absorption, and porosity of the modified sludge foam concrete are evaluated, and the TOPSIS method is employed for assessment to determine the appropriate sludge content and activation method. The experimental results indicate that increasing the sludge content and simplifying the activation method result in decreased compressive strength but improved foaming effect of the modified sludge foam concrete. Calcination has a significant impact on compressive strength, while grinding has a more pronounced effect on water absorption. Taking into account compressive strength, water absorption, and foaming effect, this study concludes that sludge with a 10% content, subjected to a single calcination process, can maximize the performance of the modified sludge foam concrete.