ULTRA-HIGH PERFORMANCE CONCRETE FRESH COMPOSITION PROPERTIES

Abstract

The present investigation relates to an ultra–high strength concrete composition with and without steel fibres having a compressive strength of about 150 MPa and 170-180 MPa, respectively. The ultra-high strength concrete composition, which includes a binding material containing cement, fine sand powder, silica fume and water at a mixing ratio 15% to17%,is easy achievable in Romania and therefore its workability and strength are just as easy retained. The object of the present investigation is to provide an ultra-high strength composition which includes a binding material containing cement, fine sand powder, silica fume and anhydrite for a determined mixing ratio and a determined workability and to study its behaviour under different keeping conditions especially in view of the compressive strength.