Published Paper Details:

This work describes experimental investigation of various mechanical properties of Ultra High Performance Concrete (UHPC) which is completely free from coarse aggregate. It is a modern cementitious composite containing a large amount of cement, both non reactive and reactive ultra fine particles, chemical admixtures with micro and macro steel fibres. This type of concrete has superior flexural, durability and excellent mechanical properties. In this work UHPC containing 2% of fibres by volume with compressive strength exceeding 120 MPa is proportioned with a cement content of 850kg/m3 and water cement ratio of 0.25. In this study detailed descriptions of the measurement of compressive strength and split tensile strength are given. The results shows that, based on the optimized particle packing with hybrid macro and micro fibres, it is possible to produce UHPC with a relatively low water-binder ratio. Moreover, due to the mutual effects between the utilized fibres, the hybrid fibre reinforced UHPC shows an improved flowability and better mechanical properties.