[Retracted] Electrochemical Preparation of Recycled Self-Compacting Concrete Composite Beams and Their Application in Prefabricated Buildings

Table 1

Change in the concrete strength of the precast layer.

Concrete strength of the cast-in-situ layer	C30	C30	C30	C30
Concrete strength of the precast layer	C25	C30	C40	C50