湖南大学学报（自然科学版）2026，Vol.53Issue(5)：101-109,9.DOI:10.16339/j.cnki.hdxbzkb.2026046
缓凝剂与级配优化对混凝土泵送性能的影响
Effect of retarder and grading optimization on pumping performance of concrete
摘要
Abstract
To minimize the impact of pumping on the performance of fresh concrete,this study examined the effect of retarder dosage on the fluidity of fresh concrete and evaluated the influence of aggregate grading optimization on the pumping performance of concrete.The results indicate that the addition of a retarder effectively inhibits cement hydration and prolongs the setting time of concrete.1.0％retarder dosage yields the optimal improvement in concrete flowability after 6 hours of standing.Replacing 10％of the continuous graded coarse aggregate with large-sized aggregate optimizes the aggregate gradation of pumped concrete,mitigating the detrimental effects of aggregates during cyclic pumping and achieving the optimal workabitity,rheological properties,and compressive strength.Combining concrete retarding technology with aggregate grading optimization achieves dual improvements in work performance and aggregate stability during the pumping process,thereby enhancing the pumpability of concrete.关键词
缓凝剂掺量/级配优化/循环泵送/工作性能/流变性能Key words
retarder dosage/grade optimization/cyclic pumping/workability/rheological properties分类
建筑与水利引用本文复制引用
杨伟,王计远,段珍华,丁梦娟,傅昊玮,王佳茜,吕振源..缓凝剂与级配优化对混凝土泵送性能的影响[J].湖南大学学报（自然科学版）,2026,53(5):101-109,9.基金项目
新疆自治区重点项目(2022D01D27),Xinjiang Autonomous Region Key Projects(2022D01D27) （2022D01D27）
