水利学报2017，Vol.48Issue(1)：13-20,8.DOI:10.13243/j.cnki.slxb.20160332
结构型钢纤维对混凝土单裂缝渗透特性的影响
Investigation of the fiber effect on the permeability of cracked concrete
摘要
Abstract
According to the splitting testing,controllable cracks are brought into the specimen for studying effects of fibers on permeability of cracked concrete.Crack patterns are analyzed by Supereyes digital microscope and IPP software.To study the permeability of cracked specimens,the water permeability experiment is implemented under a varied water head as well as a constant water head.According to the Darcy's law and Parallel plate theory,the correcting permeability of fiber reinforced concrete with a single crack is suggested.Research shows that:as to the splitting test,the failure form of plain concrete is brittle and can't control the speed of crack's development.After adding some of structural steel fibers,the specimen shows a better toughness and deformation capacity,and that the cracking development can be controlled easily.Structural steel fibers can improve the crack tortuosity,reduce the correcting factor and weaken the penetration ability of permeable medium.Compared with the traditional permeability coefficient,the correcting permeability of concrete with a single crack can sensitively reflect the influence of inner crack pattern under a constant water head,and can also analyze the relationship of them quantitatively.关键词
抗渗性能/裂缝形态/纤维混凝土/修正系数Key words
permeability/crack pattern/fiber reinforced concrete/correcting coefficient分类
建筑与水利引用本文复制引用
丁一宁,任县伟,李冬..结构型钢纤维对混凝土单裂缝渗透特性的影响[J].水利学报,2017,48(1):13-20,8.基金项目
国家自然科学基金项目(51578109) （51578109）
