中外公路2025，Vol.45Issue(2)：65-72,8.DOI:10.14048/j.issn.1671-2579.2025.02.007
保水轻骨料对超高性能混凝土强度和自收缩的影响
Effect of Lightweight Aggregate with Water-Holding Capacity on Strength and Autogenous Shrinkage of Ultra-High Performance Concrete
摘要
Abstract
In response to the significant autogenous shrinkage issue of ultra-high performance concrete(UHPC)under normal temperature curing,the influence of lightweight aggregates with water-holding capacity mixed with coarse aggregates on the compressive strength and autogenous shrinkage performance of UHPC was investigated.The mixing proportions of the two types of aggregates were optimized using the response surface method(RSM).The results show that adequate amounts of basalt and volcanic rocks with water-holding capacity effectively reduce the shrinkage of UHPC.The rigid basalt restrains the shrinkage of the matrix,while volcanic rocks with water-holding capacity release moisture slowly,alleviating the autogenous drying effect and thus reducing shrinkage.However,an excessive amount of basalt and volcanic rocks leads to a decrease in the compressive strength of UHPC.This is because the coarse aggregates increase the transition zone between the matrix and coarse aggregates,resulting in fiber clustering,and the low strength of volcanic rocks makes it difficult to compensate for the degradation effect brought about by the transition zone.关键词
超高性能混凝土/饱水火山石/玄武岩/自收缩/响应面法Key words
ultra-high performance concrete/volcanic rock with water-holding capacity/basalt/autogenous shrinkage/response surface method分类
交通工程引用本文复制引用
方驰,杨伟浩,任康,张靖航,吕毅刚,黄敦文,彭晖..保水轻骨料对超高性能混凝土强度和自收缩的影响[J].中外公路,2025,45(2):65-72,8.基金项目
国家自然科学基金资助项目(编号:52178186,52008036) （编号:52178186,52008036）
湖南省自然科学基金资助项目(2024JJ5017) （2024JJ5017）
湖南省教育厅优秀青年项目(编号:22B0344) （编号:22B0344）
交通基础设施安全风险管理交通运输行业重点实验室(长沙)开放基金资助项目(编号:22KF02) （长沙）
