硅酸盐通报2025，Vol.44Issue(9)：3218-3226,3237,10.DOI:10.16552/j.cnki.issn1001-1625.2025.0222
磨耗对再生混凝土骨料物理性能及表观形态的影响
Effect of Abrasion on Physical Properties and Apparent Morphology of Recycled Concrete Aggregates
摘要
Abstract
To investigate the effects of physical abrasion on the physical properties and morphological characteristics of recycled aggregates derived from parent concrete of varying strengths,recycled coarse aggregates were produced from C35,C40,and C50 grade concretes and subjected to physical enhancement using a Los Angeles abrasion machine.The influences of steel ball quantity and number of revolutions on the apparent density,water absorption,and crushing value of recycled aggregates from different parent concrete strengths were examined.The aggregate image measurement system(AIMS)was employed to collect morphological characteristics of the aggregates before and after abrasion treatment,focusing on angularity,texture,and sphericity.The results show that the physical properties and morphological characteristics of recycled aggregates are significantly influenced by the number of steel balls,rotation counts,and parent concrete strength.Under the condition of 8 steel balls and 400 revolutions,the apparent density of C35 recycled aggregates increases by 1.52％,the water absorption decreases by 36.05％,and the crushing value reduces by 27.41％.Additionally,the angularity index decreases by 34.28％,the sphericity increases by 19.61％,and the texture index increases by 9.30％.Further increasing the number of steel balls or revolutions leads to secondary crushing of the aggregates,resulting in diminished performance improvement.Apparent density is negatively correlated with parent concrete strength,while the crushing value shows a positive correlation.Water absorption does not exhibit a clear correlation,showing a fluctuating trend.Angularity index and sphericity show a decreasing-then-increasing trend with increasing strength,whereas texture index displays an opposite trend.The abrasion condition of 8 steel balls and 400 revolutions can simultaneously improve the physical properties and optimize the morphological characteristics of recycled aggregates,providing a theoretical basis for their refined processing.关键词
再生骨料/物理磨耗/母体混凝土强度/物理性能/形态特征Key words
recycled aggregate/physical abrasion/parent concrete strength/physical property/morphological characteristic分类
建筑与水利引用本文复制引用
吕洁琴,袁豪,高玲,王岩,顾杨,孙仁娟..磨耗对再生混凝土骨料物理性能及表观形态的影响[J].硅酸盐通报,2025,44(9):3218-3226,3237,10.基金项目
山东省基金面上项目(ZR2021ME215) （ZR2021ME215）
