Study on mechanical properties and damage characteristics of rice straw fiber-reinforced cemented tailings backfill based on energy evolution.

Low-cost and underutilized plant fibers can affect the mechanical behavior of cementitious materials such as cemented tailings backfill (CTB). This paper attempts to explore the mechanical properties and damage evolution characteristics of rice straw fiber (RFS)-reinforced CTB (RSFCTB) from the perspective of energy. A series of mechanical and microscopic tests were carried out on CTB and RSFCTB samples.

Analysis on mechanical properties and mesoscopic acoustic emission characteristics of prefabricated fracture cemented paste backfill under different loading rates.

The mechanical characteristics of cemented paste backfill (CPB) are significantly influenced by the loading rate (LR) and initial defects. Therefore, the CPB with prefabricated fracture (PF, PFCPB) was prepared, and uniaxial compressive strength (UCS) tests considering LR and acoustic emission (AE) monitoring were performed. The particle flow code (PFC2D) was introduced to analyze the mesoscopic crack evolution of the filling body, and the moment tensor theory was used to invert the AE signals characteristics.

Mesoscopic damage evolution and acoustic emission characteristics of cemented paste backfill under different loading rates.

The cemented paste backfill (CPB) has a significant loading rate (LR) effect. The damage evolution process of CPB is closely related to the characteristics of acoustic emission (AE). This paper analyzes the damage evolution law of the filling body under different loading rates using indoor test and numerical simulations.

Serum metabolomic research of the anti-pulmonary fibrosis effects of Shuangshen Pingfei Formula on bleomycin-induced pulmonary fibrosis rats.

Our previous studies showed that Shuangshen Pingfei Formula (SSPF) exhibited anti-fibrosis effect, but its biochemical changes at the metabolic level remain unclear. In this study, an integrative approach of gas chromatography-mass spectrometry (GC-MS) and ultra performance liquid chromatography-Q Exactive-mass spectrometry (UPLC-QE-MS)-based non-targeted metabolomics and multivariate statistical analysis was employed to explore the metabolic changes of serum samples from different stages of bleomycin-induced pulmonary fibrosis (PF) rats (PFRs: M7, M14, M21 and M28) treated with SSPF extracts. Potential biomarkers for PF were screened.