The study of using fly ash to produce Ultra High Performance Fibre Reinforced Concrete

摘要

Ultra High Performance Fibre Reinforced Concrete (UHPFRC) is a cement-based material, which behaves like a low-porosity ceramic material with excellent mechanical performance. Thiswork was aimed to study soft cast (flowable at casting time) UHPFRCs and, in particular, UHPFRC mechanical performance was monitored by means of compression, bending and splitting tension tests. Two different kinds of mineral addition were compared: silica fume and fly ash. In the case of fly ash, several water to cement ratios were tested ranging from 0.20 to 0.25. Moreover, steel fibers and acrylic-based superplasticizer were employed to prepare the UHPFRC mixtures.