In this study, we investigated the effects of Field's metal (FM) nanoparticles (NPs) on the mechanical behaviour of cement paste under quasi-static (QS) and dynamic strain rates. We found the highest mechanical improvement under QS loading with 1 % FM dosage, beyond which boosting the dosage diminished its contribution to the mechanical performance. Conversely, under dynamic loadings, boosting the dosage from 1 % to 4 % FM significantly and progressively enhanced the overall mechanical performance. These results indicated that the mechanical impacts that ensue from the microstructural modification effects of FM differ with dosage and strain rates. Under QS loading, the pore-refining effect of the NPs was predominant, whereas, under dynamic loadings, the reinforcing effect of the NPs was the primary factor. Furthermore, by comparing the effects of FM and nanosilica NPs, our findings underscored the pronounced effect of the nanomaterial physical and mechanical properties on the strain-rate sensitivity of cementitious nanocomposites.

在这项研究中，我们研究了 Field 的金属 (FM) 纳米粒子 (NPs) 在准静态 (QS) 和动态应变率下对水泥浆体力学行为的影响。我们发现在 QS 负载下，FM 剂量为 1% 时，机械性能改善最高，超过此剂量，增加剂量会降低其对机械性能的贡献。相反，在动态载荷下，将剂量从 1% 提高到 4% FM 显着并逐步提高整体机械性能。这些结果表明，FM 的微观结构改性效应所产生的机械影响随剂量和应变率的不同而不同。在 QS 载荷下，NPs 的孔细化作用占主导地位，而在动态载荷下，NPs 的增强作用是主要因素。此外，