Asphalt mixing station waste powder synchronous curing granulation and artificial aggregate preparation method

Abstract

The invention relates to the technical field of solid waste resource utilization, and discloses an asphalt mixing station waste powder synchronous curing granulation and artificial aggregate preparation method, which comprises the following steps: S1, asphalt mixing station waste powder pretreatment; s2, preparing a PCSB composite curing agent; s3, preparing a mixture; s4, extrusion and carbonization synergistic forming; s5, carbon sequestration maintenance and performance regulation and control; and S6, collecting, grading and packaging finished products. By adopting the technical scheme of compounding a PCSB quaternary composite curing agent system and through the synergistic effect of Portland cement, a carbonate activator, a silicate modifier and a bio-based binder, the gelation activity of waste powder is effectively activated, the mechanical property and durability of the artificial aggregate are improved, the dosage of a curing agent is reduced, and the cost is reduced. Compared with the technical scheme of adopting single cement as a curing agent in the prior art, the problems that the curing efficiency is low, the production cost is high, the aggregate strength and durability are poor, and the engineering application requirements cannot be met are solved.

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