Introduction to UHPC
Ultra High Performance Concrete, or UHPC, is one of the latest advances in concrete technology and it addresses the shortcomings of many concretes today: It provides high strength to weight ratio, high tensile strength, high ductility, and volume stability. It has a compressive strength 2 to 3 times greater than conventional concrete and a flexural strength 2 to 6 times greater.
These mechanical properties of UHPC make it ideal for prestressing applications. In addition to achieving high compressive strengths in excess of 25,000 psi (sometimes greater than 30,000 psi), UHPC is also nearly impermeable.
UHPC consists of fibre and steel reinforced cement; the cement mixture is composed of Portland Cement combined with silica fume and fine steel filings.
UHPC was developed in Europe in the 1980s for specialised applications that demand superior strength and corrosion resistance , such as for marine applications or seismic structures. More recently, the use of UHPC has expanded to applications requiring its high strength in narrow profiles, such as bridge spans and building facades in which the material’s strength, wear resistance, lighter weight and lower life cycle costs have been the driving determinates.
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