1 School of Civil and Transportation Engineering, Ningbo University of Technology, Ningbo 315211, Zhejiang, China 2 Engineering Research Center of Transportation Pavement Materials, Ministry of Education, Chang'an University, Xi'an 710061, China 3 Qinghai Research Institute of Transportation, Xining 810016, China 4 School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China
Abstract: With the acceleration of urbanization and the continuous increase in urban population in China, the production of municipal sludge has been increasing year by year. Using municipal sludge as raw material to prepare ceramic particles is one effective method to reduce disposal costs, avoid secondary pollution, and improve the utilization rate of sludge resources. This article compares and analyzes the preparation process and basic flow of municipal sludge ceramic particles, clarifies key factors affecting performance; summarizes modification methods for sludge ceramsite and their mechanisms for performance improvement; finally, discusses and prospects the application prospects of sludge-ceramic particle production. The results show that raw material ratio, preheating conditions, firing conditions, addition of additives, and curing methods all have an impact on the performance of sludge ceramic particles; while alkali treatment, hydrophobic treatment and high-temperature treatment can enhance their intrinsic performance, mechanical properties, solidification effects and adsorption capacity. Optimizing the preparation process for sludge ceramsite to achieve large-scale production is one future research direction for utilizing sludge resources.
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2025, Vol. 39 
