Abstract

As a new construction technology, 3D printing concrete has the advantages of mechanization and model-free. Waste brick is an important part of construction waste. Its disposal not only consumes land but also pollutes the environment. At the same time, cement is the main raw material in concrete materials. Cement production consumes resources, produces greenhouse gases and is not environmentally friendly. Therefore, grinding brick waste into recycled brick powder and replacing cement to produce 3D-printed concrete is considered a feasible method. This paper reviews the effects of recycled brick powder on hydration, workability, mechanical properties and durability of 3D-printed concrete, analyzes its mechanism, and points out some problems to be further studied at present.

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