Mechanical Properties and Development of Steel Fiber, Polypropylene Fiber and Steel-Polypropylene Fiber Concrete Structures

Abstract

Fibre concrete is a commonly improved concrete. Compared with ordinary concrete, it has more excellent characteristics and has been widely used in engineering structures and other fields. This paper describes the mechanical properties of polypropylene fibres, steel fibres, and hybrid fibres (steel fibres and polypropylene fibres); it discusses the use and development of these three kinds of fibre concrete in various professional fields. Steel fibre concrete overcomes the shortcomings of concrete, such as low tensile strength, slight ultimate elongation, brittle, et al., with excellent tensile, flexural, shear, crack resistance, fatigue resistance, high toughness and other properties, has been applied in the field of hydraulics, roads and bridges, construction and other engineering fields. Polypropylene has better crack and impact resistance because of its ability to be uniformly dispersed in the concrete; chemically stable, simple construction has been widely used in the world. Steel-polypropylene hybrid fibre concrete has excellent mechanical properties and economy due to the integration of steel fibres and polypropylene fibres with high strength and toughness. It has a broader prospect in the application of engineering materials.