In this paper, in order to continuously promote the carbon peak and neutrality targets, and accelerate the construction of the waste material recycling systems, a lightweight construction material was prepared by compounding magnesium oxychloride cement (MOC) inorganic cementitious material and waste bamboo scraps, and foaming them with hydrogen peroxide. However, the poor water resistance of MOC composites makes it difficult to meet the needs under special environmental conditions, which seriously affects their popularization and application range. To solve this problem, Polyvinyl acetate (PV...