Performance of Lightweight Peach-Shell Concrete with Optimal Substitution Ratio

Peach shell, a distinctive agricultural residue in China, exhibits the potential to substitute concrete aggregates, facilitating the creation of eco-lightweight concrete. This study determines the optimal volume substitution rate based on strength and density for peach-shell concrete. It delves into microscopic features, hydration outcomes, mechanical traits, sound absorption, impermeability, and techniques to enhance the impermeability. The outcomes reveal that peach-shell concrete's compressive, flexural, and splitting tensile properties are comparatively lower than ordinary concrete due to reduced peach-shell aggregate, cement paste, and interfacial bonding strength. However, it excels in sound absorption owing to larger biological pores. While its impermeability trails ordinary concrete, polyvinyl alcohol coating proves effective for improvement. In essence, this research comprehensively examines peach-shell concrete's attributes, offering insights for practical applications of lightweight peach-shell concrete.