| Considerable research has been focused on development of ultra-high performance fiber-reinforced concrete (UHP-FRC) during the last two decades. Initial success was achieved by means of special mixing and curing treatments, such as vacuum mixing and heat and pressure curing, which are not practical for large-scale cast-in-place applications. This research first focused on developing UHP-FRC by dense particle packing concept without any special mixing and treatments. Therefore, the effect of different types of mix components, water-to-cementitious materials ratios, fiber volume fractions, and sand ratios were investigated in order to obtain a denser mix with high compressive strength of up to 30 ksi.;Later, fly ash was introduced as a supplement cementitious material for enhancing the flow-ability of the mix. Due to its round particle shape, the UHP-FRC components can easily roll over each other, thus facilitating the flow-ability of the mix during the mixing stage and the large-scale cast-in-place applications. Further research was then followed to study the compressive and tensile behavior of the developed materials by obtaining the compressive and tensile stress versus strain curves. One tensile specimen reinforced with 1... |
