[justify]RPC was first developed by P. Richard and M. Cheyrezy.RPC was first produced in the early 1990’s by researchers at Bouygues laboratory in France and the world’s first RPC structure, the Sherbrooke Bridge in Canada was constructed in July 1997.
RPC is an ultra high strength and high ductility cementitious composite with advanced mechanical and chemical properties.There are concretes that leads the way to the achievement of the maximum compressive strength of the order 120-150 Mpa.
In order to increase the compressive strength of concrete even further, the only way is to remove the coarse aggregate.This philosophy has been employed in what is today known as Reactive Powder Concrete.RPC is not just a simple mixture of cement, water and aggregates. Quite often, it contains mineral components and chemical admixtures having very specific characteristics, which impart specific properties to the concrete.
Advantages of RPC
It has the potential to structurally compete with steel.
Superior strength combined with higher shear capacity result in significant dead load reduction.
RPC can be used to resist all but direct primary tensile stress.
Improved seismic performance by reducing inertia load with lighter member .
Low & non-interconnected porosity diminishes mass transfer, making penetration of liquid/gas non-existent.
Least costly components of conventional concrete are eliminated by more expensive elements.
RPC is still in the intial stages,So long term properties are not yet known.
The reactive powder concrete produced by routine concrete manufacture techniques has compressive strength above 160 MPa, bending strength above 20 MPa, fine frost resistance, and impermeability of chloride. The sidewalk flat system produced by the reactive powder concrete has light deadweight, low cost, and the littler workload, which makes it suitable for bridge and its subsidiary facilities on the Qinghai-Tibet plateau.[/justify]
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