新疆农业大学学报2025，Vol.47Issue(3)：222-227,6.DOI:10.20088/j.cnki.jxau.2025.03.007
面板倾角与纤维对混凝土早期开裂性能的影响
Influence of Slab Inclination and Fiber on Early-Age Cracking Behavior of Concrete
摘要
Abstract
This paper experimentally investigates the effects of panel inclination,basalt fiber content,and curing methods on the early-age cracking performance of face slab concrete.Using the restrained plate test with knife-edges,the cracking characteristics of concrete under three panel inclination angles(0°,30°,and 45°)were compared and analyzed.Meanwhile,the influences of polyethylene(PE)membrane curing and the incorporation of basalt fibers under a 45° panel inclination on the cracking behavior were also exam-ined.The results indicated that as the panel inclination increased,the support provided by the lower part of the restraint enhanced,leading to a gradual reduction in the effectiveness of the restrained ring-induced cracking and a decrease in the total cracking area.Specifically,the total cracking area of specimens with a 45° inclination decreased by 71.7%compared to those with a 30° inclination.Furthermore,the addition of 0.2%basalt fibers effectively improved the early-age compressive strength and microstructure of the con-crete,reducing the total cracking area by 19.0%compared to the reference concrete and delaying the initial cracking time by 280 min.PE membrane curing delayed the initial cracking time of the panels by 20 min and reduced the total cracking area by 2.1%compared to the reference concrete.In conclusion,employing a higher slab inclination,an appropriate dosage of basalt fibers,and combined membrane curing can effec-tively enhance the early-age crack resistance of concrete specimens in the restrained plate test.关键词
混凝土/刀口法/早期开裂/面板倾角/玄武岩纤维Key words
concrete/knife-edge method/early-age cracking/inclination angle/basalt fiber分类
建筑与水利引用本文复制引用
张硕煜,姜春萌,陈英杰,李双喜,刘健..面板倾角与纤维对混凝土早期开裂性能的影响[J].新疆农业大学学报,2025,47(3):222-227,6.基金项目
新疆维吾尔自治区"三农"骨干培养项目(2023SNGGGCC002) （2023SNGGGCC002）
