Effect of admixtures on mechanical properties of steel fibre reinforced polymer high-strength concrete

摘要

In this study, a new kind of steel fibre reinforced polymer high-strength concrete was developed for bridge structures. This material is component of C60 concrete and some admixtures, including steel fibre, polymer latex, fly ash, etc. An experimental study was performed to determine the mixture ratio of the new material and test the fundamental mechanical performances, such as the tensile and compressive strength. Scanning electron microscope (SEM) investigation and mechanism analysis were employed to study the effect of the admixtures on the material properties. The results show that the strength, toughness and crack resistance of the C60 concrete are improved if appropriate content of steel fibre, polymer latex and fly ash are added.