摘要
为探究不同水胶比和钢纤维体积分数对超高性能混凝土(UHPC)抗压强度的影响,选取3种水胶比(0.16、0.18、0.2)和4种钢纤维体积分数(0、1%、2%、3%)作为试验变量,对3种几何形态(立方体、棱柱体、圆柱体)的UHPC试样进行轴压试验。试验结果表明,UHPC抗压强度的增长与钢纤维体积分数增长成正比,与水胶比增长成反比,且变化趋势随变量的增长逐渐放缓。提出了不同尺寸及形态下UHPC试样抗压强度转换系数的建议值,建立了UHPC棱柱体和圆柱体的抗压强度计算式。
It aims to evaluate the effect of different water-binder ratios and steel fiber volume fractions on the compressive strength of ultra-high performance concrete(UHPC).Select three water-binder ratios(0.16,0.18,0.2)and four steel fiber volume fraction(0,1%,2%,3%)as variable quantity for these experiments.The uniaxial compressive strength of UHPC specimens in three geometries(cube,prism,cylinder)were measured.The results show that the increase of UHPC compressive strength is directly proportional to the increase of steel fiber volume fraction and inversely proportional to the increase of water-binder ratio,and the change trend gradually slows down with the growth of variables.Suggested values of compressive strength conversion coefficients for UHPC specimens with different shapes and sizes were proposed.The calculation formula of prismatic compressive strength and cylinder compressive strength are established.
作者
何羽茜
杜国锋
曹煊
张继承
HE Yuxi;DU Guofeng;CAO Xuan;ZHANG Jicheng(College of Urban Construction,Yangtze University,Jingzhou 434000,China)
出处
《混凝土》
CAS
北大核心
2024年第3期165-170,共6页
Concrete
基金
国家自然科学基金“高强钢管超高性能混凝土地震损伤机理及抗震性能调控方法”(52078052)。
关键词
UHPC
钢纤维
水胶比
抗压强度
ultra-high performance concrete(UHPC)
steel fiber
water-binder ratio
compressive strength
