大连理工大学学报2012，Vol.52Issue(2)：233-238,6.
钢纤维增强超高强混凝土拉压比试验研究
Experimental study of ratio between splitting tensile strength and compressive strength for steel fiber reinforced ultra high strength concrete
摘要
Abstract
An experimental study of the splitting tensile strength and cubic compressive strength of thread-typed steel fiber reinforced ultra high strength concrete（C100） was carried out.Effects of steel fiber were analyzed on the enhanced toughness and ratio between splitting tensile strength and compressive strength.The dimensions of cubic specimens were 100 mm×100 mm×100 mm and steel fibers were added at the volume fractions of 0,0.50%,0.75%,1.00% and 1.50%.The research results show that cracks developing path of ultra high strength concrete cubic specimens is more and cracks are scattered,but specimens are not broken,and the compressive toughness is enhanced with an addition of steel fiber.Besides,the compressive strength increases by 10.6%-15.5%,splitting strength increases by 38.2%-91.9% and ratio between splitting tensile strength and compressive strength is 0.060 5-0.084 6,increases by 24.08%-73.46% after steel fibers are added.The prediction models for splitting tensile strength and compressive strength are presented and errors of predicted and measured values are ±1.79% and ±17.84% respectively.Conclusions are drawn that marked brittleness and bad toughness can be overcome by an addition of steel fibers for ultra high strength concrete.关键词
钢纤维/超高强混凝土/拉压比/韧性Key words
steel fiber ultra high strength concrete ratio between splitting tensile strength and compressive strength toughness分类
建筑与水利引用本文复制引用
闫长旺,贾金青,张菊..钢纤维增强超高强混凝土拉压比试验研究[J].大连理工大学学报,2012,52(2):233-238,6.基金项目
国家自然科学基金资助项目 （）
海岸和近海工程国家重点实验室开放基金资助项目 （）
中国博士后科学基金资助项目（20100471445）. （）
