Research on the mix proportion and tensile properties of high ductility fiber-reinforced concrete(HS-ECC),analyzing the influence of water cement ratio,sand gradation,fiber length,and fiber content on the tensile properties of HS-ECC.The results show that when the water-binder ratio is 0.30,the ultimate elongation of HS-ECC could reach 2.37％.Using densely packed graded sand with a maximum particle size of 0.63 mm to prepare concrete can improve the adhesion between the matrix and fibers,and increase the ultimate elongation of concrete.When the fiber length is 12 mm,strain strengthening can continue until the strain is about 2.4％,which is more than twice that of short fibers.As the fiber content increases,the ductility of HS-ECC improves.When the fiber content is 2.0％,ideal ductility effect can be obtained,achieving HS-ECC multiple cracking and strain strengthening.
关键词
高延性混凝土/配合比设计/拉伸性能
Key words
high ductility concrete/mix proportion design/tensile properties
维普
万方数据