Effect of micro steel fibre contents on compressive and self-sensing properties of polyethylene fibre-reinforced cement composite (PE-FRCC) in cyclic compression

Abstract This study is conducted to develop a cement-based strain-detecting sensor with high cost-effectivity, large strain measuring range and good compatibility concrete infrastructures. The paper describes experimental results on the compressive properties piezoresistive behaviour of polyethylene(PE) fibre-reinforced cement composite(PE-FRCC) different contents micro steel fibres (SFs) under cyclic compression. synthetic PE were added into mortar improve capacity in compression SFs at 0.25-1.5% by volume fraction incorporated electrical conductivity. Test show that for PE-FRCC strength 32MPa, increase SF content 0.5% increased about 45% compared without SFs. addition improved properties, such as modulus elasticity lateral confinement. incorporation also effective reduce signal noise relationship between fractional change resistance (FCR) axial PE-FRCC. more 1.0% (PE0.75+SF1.00 composite) possess strong linear FCR during repeated stress amplitudes.