Effect of carbon fiber and graphite on the mechanical properties of conductive fine-grained concrete in textile reinforced concrete

In order to further explore the influence of single and double-doped carbon fiber and graphite on the mechanical properties of fine-grained concrete, compressive tests, flexural tests and uniaxial compressive tests were used. Researches show that the bending strength increases the most when 0.25% carbon fiber and 10% graphite are added in the fine-grained concrete. The ultimate failure modes of fine-grained concrete under uniaxial compression contains two types: split and shear. The double-doped conductive material can make up for the defects existing after the addition of single conductive material and improve concrete performance. Finally, based on the Kent and Park constitutive model and combined with the full-stress-strain curve image obtained by the test in this paper, a modified Kent and Park three-line function stress-strain constitutive model of finegrained concrete was established.