海南大学学报（自然科学版中英文）2026，Vol.44Issue(1)：51-61,11.DOI:10.65658/j.hndk.2025030701
熟石灰与硅灰对再生混凝土力学性能的协同作用
Synergistic effect of silica fume and hydrated lime on mechanical properties of re-cycled aggregate concrete
摘要
Abstract
To improve the recycling efficiency of waste concrete,this study systematically investigated the effects of silica fume and hydrated lime modifications(both individual and in combination)on the mechanical properties of recycled aggregate concrete(RAC).The triple mixing technique was employed during concrete preparation.Compressive and splitting tensile tests were conducted to evaluate the fundamental mechanical properties of RAC,while scanning electron microscopy(SEM)was used to analyze its microstructural characteristics.The results demonstrated that the individual incorporation of either silica fume or hydrated lime yielded only marginal improvements in compressive strength and splitting tensile strength.In contrast,the composite modification combining both silica fume and hydrated lime significantly enhanced the mechanical performance of RAC.Microscopic analysis further revealed that the composite system substantially improved microstructural compactness and the interfical bonding between aggregates and cement paste.These findings provide valuable insights for the practical application of recycled coarse aggregates,demonstrating that optimized composite modification could effectively enhance the mechanical performance of recycled concrete while advancing sustainable resource utilization in construction.关键词
再生混凝土/硅灰与熟石灰复合/抗压强度/劈裂抗拉强度/微观分析Key words
recycled concrete/silica fume-hydrated lime composite/compressive strength/split tensile strength/microscopic analysis分类
建筑与水利引用本文复制引用
邢贺,李艳,赵菲,林常..熟石灰与硅灰对再生混凝土力学性能的协同作用[J].海南大学学报（自然科学版中英文）,2026,44(1):51-61,11.基金项目
本文得到海南省自然科学基金高层次人才项目(520RC549)支持. This work was supported by High-Level Talent Project of Natural Science Foundation of Hainan Province(520RC549). （520RC549）
