摘要
Abstract
In order to study the effect of freeze-thaw cycling-sulfate attack on SCC properties of steel fibers,the mechanical properties of self-compacting concrete under freeze-thaw cycling-sulfate attack were systematically studied by preparing 5 groups of concrete specimens with different volume fractions of steel fibers and conducting different times of freeze-thaw cycling-sulfate attack tests.The test results show that the compressive,flexural and tensile strength of SCC decrease with the increase of erosion times.The mechanical properties of SCC are en-hanced with the increase of steel fiber volume fraction.After 300 times of erosion,the compressive strength of concrete with different steel fiber volume fraction(SCC-0～SCC-1.2)decreased by 6.75%～12.77%,the flexural strength decreased by 10.50%～13.05%,and the tensile strength decreased by 4.19%～11.62%.When the volume fraction of steel fiber increases from 0 to 1.20%,the compressive strength,ben-ding strength and tensile strength of concrete increase by 6.18%～12.97%,11.61%～14.14%and 22.68%～32.99%under different ero-sion times.关键词
钢纤维/自密实混凝土/冻融循环-硫酸盐侵蚀/力学性能Key words
Steel fiber/Self-compacting concrete/Freeze-thaw cycle-sulfate attack/Mechanical property分类
建筑与水利
