This paper describes an investigation of ultra-high strength, high ductility, and low porosity cementitious composite material designated Reactive Powder Concrete (RPC). This relatively new material incorporates low water-cement ratio, high cement content, high silica fume content and high dosages of superplasticisers to achieve a satisfactory workability. The only aggregate used is silica sand, and by introducing a special steel fibre, a tensile flexural strength of up to 50MPa can be achieved. The basic properties of this material are related to the composition, mixing and the post-set heat treatment. RPC has high strength and ductility, it is an ideal material for the structure that resists high impact load or explosive loading. Compared to traditional reinforced concrete, RPC is relatively expensive, and full-scale concrete tests often need to be destructive. Finite element modelling together with limited physical testing is an economic way to investigate the dynamic behaviour. The objectives of this project are to both explore the mix design of the material and to investigate suitable means of modelling RPC using DYNA3D, an explicit finite elements analysis package ideally suited to impact analysis. The research also needs to be conducted to develop, and facilitate commercialisation of precast products which utilize many of the enhanced properties.