INFLUENCE OF MIXING SPEED AND DURATION ON THE FRESH AND HARDENED PROPERTIES OF REACTIVE POWDER CONCRETE

Structure engineering

Reactive Powder Concrete is a new generation concrete, is one type of high strength and highdurable concrete which is formed with a special combination of constituent materials. The reactive powder concrete is a composition of cement, silica fume, fine sand, quartz powder. This concrete is capable to achieve a very high compressive strength. Production methodology of Reactive Powder Concrete (RPC) is not clearly established yet, as several parameters have a varied influence on the resulting fresh and hardened properties of RPC. Even for the same composition, the fresh and hardened properties differ significantly by changing mixing speed and mixing time/duration. The present investigation is an attempt to study the effect of speed and duration, on the fresh and hardened properties of RPC. Production methodology of Reactive Powder Concrete (RPC) is not clearly established yet, as several parameters have a varied influence on the resulting fresh and hardened properties of RPC. Even for the same composition, the fresh and hardened properties differ significantly by changing mixing method, mixing speed and mixing time/duration. The present investigation is an attempt to study the effect of mixing method, speed and duration, on the fresh and hardened properties of RPC. The study also deals with the microstructure investigation of RPC mixes.

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