Pore water is widely recognized as a critical factor that exerts a substantial impact on the mechanical strength of concrete materials. The present study centers on investigating the energy dissipation behavior of concrete under various conditions. Through systematic experimental analysis and theoretical derivation, the research team successfully deduced energy dissipation calculation formulas tailored to concrete specimens across different stress stages and for distinct concrete types. Additionally, the study thoroughly examined the underlying mechanisms through which pore water modulates the energy dissipation characteristics of concrete, ultimately establishing a comprehensive quantitative calculation model specifically for wet concrete’s energy dissipation. For the purpose of validating the proposed model and derived formulas, comparative tests were conducted on three representative concrete types: natural aggregate concrete (NAC), recycled concrete aggregate concrete (RCAC), and recycled brick aggregate concrete (RBAC). The test results revealed distinct energy dissipation patterns among the three materials: When the water–cement ratio was set to 0.41, 0.46, and 0.52, respectively, the cumulative energy values of RCAC were equivalent to 85.6%, 87.3%, and 91.6% of those observed in NAC. In contrast, under water–cement ratio conditions of 0.41, 0.46, and 0.62, the cumulative energy of RBAC accounted for only 73.5%, 69.4%, and 58.2% of NAC’s cumulative energy, indicating significant variations in energy dissipation capacity closely related to aggregate properties and pore water content. In water‐saturated state, the cumulative energy of NAC decreases by 12.5%−19.2%, the cumulative energy of RCAC decreases by 15.7%−34.85%, and the cumulative energy of RBAC decreases by 15.5%−28.6%. The research results provide a new idea for the energy dissipation mechanism analysis and quantitative calculation of wet concrete.
Chen et al. (Thu,) studied this question.