School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China.
Environ Sci Pollut Res Int. 2024 Aug;31(38):50709-50721. doi: 10.1007/s11356-024-34559-1. Epub 2024 Aug 5.
Recycling industrial solid wastes as building materials in the construction field exhibits great environmental benefits. This study designed an eco-friendly non-sintered brick by combining multiple industrial solid wastes, including sewage sludge, fly ash, and phosphorus gypsum. The mechanical properties, microstructure, and environmental impacts of waste-based non-sintered bricks (WNBs) were investigated comprehensively. The results revealed that WNB exhibited excellent mechanical properties. In addition, steam curing could further promote the strength development of WNB. The compressive strength of WNB with 10 wt% of sewage sludge reached 13.5 MPa. Phase assemblage results indicated that the incorporation of sewage sludge promoted the generation of ettringite. Mercury intrusion porosimetry results demonstrated that the pore structure of WNB varies with the dosage of sewage sludge. Life-cycle assessment results revealed that the energy consumption and CO emission of WNB were 45% and 17% lower than those of traditional clay bricks. Overall, the development of WNB in this study provided insights into the co-disposal of industrial solid wastes.
将工业固体废物回收再利用作为建筑材料在建筑领域具有巨大的环境效益。本研究通过结合多种工业固体废物，包括污水污泥、粉煤灰和磷石膏，设计了一种环保型非烧结砖。全面研究了基于废物的非烧结砖（WNB）的力学性能、微观结构和环境影响。结果表明，WNB 具有优异的力学性能。此外，蒸汽养护可以进一步促进 WNB 强度的发展。添加 10wt%污水污泥的 WNB 的抗压强度达到 13.5MPa。物相组成结果表明，污水污泥的掺入促进了钙矾石的生成。压汞孔隙度分析结果表明，WNB 的孔隙结构随污水污泥用量的变化而变化。生命周期评估结果表明，WNB 的能源消耗和 CO 排放比传统粘土砖分别低 45%和 17%。总的来说，本研究中 WNB 的开发为工业固体废物的协同处置提供了思路。
