Efficient utilization technology and research prospects for waste slurry and soil from engineering construction

To enhance the green and efficient treatment and disposal of waste slurry and soil generated during urban engineering construction, we explore the key technologies for their high-efficiency resources utilization and outline future research directions. A coupling theoretical method for phase separation and resource utilization of waste slurry and soil is proposed. Based on the development of material systems, the establishment of process-technology-evaluation methods, and the advancement of intelligent equipment, a complete set of green and efficient resource utilization technologies has been developed to address the large-scale treatment and disposal challenges of waste slurry and soil. Future research on waste slurry and soil can be conducted at three levels: large-scale disposal and treatment, functional engineering utilization, and the development of advanced materials derived from solid waste. Furthermore, a concept of soil-water coupled utilization based on waste slurry and soil is introduced. By employing geopolymer-based solidification and mesoporous functional regulation, waste soil can be transformed into advanced filling materials with permeability, breathability, and multifunctional such as catalysis, carbon sequestration, and pollutant removal. While achieving the treatment and disposal of waste slurry and soil, this approach also generates positive environmental effects for soil and water pollution control. This study provides new solutions to the treatment and disposal challenges of waste slurry and soil in engineering construction and has significant implications for the management of urban ecological environments.