Waste concrete aggregate is the source of recycled aggregate concrete, which is the major element of building decoration materials. The increasing amount of construction waste generated by urban and rural demolition and project renovation poses a serious threat to the balance of ecological resources. Dubbed an "urban mineral", waste concrete can be recycled to reduce the consumption of natural aggregates from the very beginning and to realize the industrialized development of renewable resources. Use of bare concrete in decoration projects can reduce decoration waste and achieve good ecological benefits. By studying the preparation and construction techniques of bare concrete, we aim to lay a certain theoretical foundation for the application and extension of recycled aggregate concrete. In combination with case studies of architectural decorations, we demonstrate the practical, artistic and environmental values of recycled aggregate bare concrete, showing its good development prospect.