固废基3D打印制品成型与应用技术研究OA

This study focuses on the high-value utilization of construction waste through resource recovery and proposes a solid waste additive manufacturing process route based on red brick recycled micro-powder.Through graded crushing,precise screening and moisture content control,efficient pretreatment of raw materials is achieved.In the material compounding process,a fixed water-binder ratio(0.35)and cement-sand ratio(0.5)are maintained,and the recycled sand is pre-wetted to ensure workability.Laboratory printing adopts a specially formulated ratio(cement 26％,recycled micro-powder 3％,recycled sand 58％,supplemented with fibers and various functional additives),explores printing parameters,and explores industrial-scale printing solutions.The research shows that this process successfully solves the problems of particle size control and molding stability in solid waste additive manufacturing.The solid waste content in the entire process is＞60％.A complete system from solid waste pretreatment,micro-powder preparation,material optimization design to structural molding printing and standardized curing has been established at both the laboratory and factory levels,achieving the efficient conversion of construction waste into customizable,high-performance 3D printed products.This provides a feasible technical paradigm and practical support for the large-scale production and low-carbon development of solid waste-based green building materials.