Feasibility Study on Manufacturing Lightweight Aggregates from Water Purification Sludge

International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料科学

Peng, Ching-Fang^1 ; Chen, How-Ji^1

Department of Civil Engineering, National Chung-Hsing University, Taiwan^1

关键词: Chemical compositions;    Feasibility studies;    Light weight aggregate;    Organic impurities;    Particle densities;    Physical and mechanical properties;    Water purification;    Water purification plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/307/1/012019/pdf
DOI  :  10.1088/1757-899X/307/1/012019

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This study mainly discussed the feasibility of manufacturing lightweight aggregates from water purification sludge in Taiwan. They were analysed for the physical and chemical composition before the sintering test for lightweight aggregates in a laboratory. Then the physical and mechanical properties of the synthesized aggregates were assessed. The result showed that the chemical composition of sludge in the water purification plants was within the appropriate range for manufacturing lightweight aggregate as proposed in the literature. The sintering test demonstrated that the particle density of aggregates from the ten types of water purification sludge were mostly less than 1.8 g/cm3. In addition, the dry unit weight, the organic impurity, the ignition loss, and other characteristics of synthesized aggregates met the requirement of CNS standards, while its water absorption and crushing strength also fulfilled the general commercial specifications. Therefore, reclamation of water purification sludge for production of lightweight aggregate is indeed feasible.