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Ultra High Performance Concrete (UHPC)
There is no codified definition of Ultra high performance concrete (UHPC), also referred to as Ultra high strength concrete (UHSC). However it is considered to be a cement-based material exhibiting high compressive strength, high ductility and excellent durability.
fib Model Code 2010 covers concrete up to a characteristic strength (fck) of 120MPa. They define normal strength concrete (NSC) as fck<=50MPa and High strength concrete (HSC) as fck >50MPa. The characteristic compressive strength for UHSC is, by default, fck> 120MPa.
Acknowledgement:
The Concrete Society
