What is ultra high-performance concrete?
UHPC is a family of concretes offering a combination of material and performance characteristics that create products with: • Ductility: ability to support tensile loads even after initial cracking • Ultra high compressive strength (up to 200 MPa/29,000 psi) • Extreme durability; low water to cementitious material (w/cm) ratio • Self-consolidating and highly moldable mixtures • High-quality surfaces • Flexural/tensile strength (up to 40 MPa/5,800 psi) through fiber reinforcement • Thinner sections; longer spans; lighter weight • New graceful product geometries • Chloride impermeability • Abrasion and fire resistance • No steel reinforcing bar cages • Minimal creep and shrinkage after curing • Optimized mix proportions UHPC mixtures contain portland cement, silica fume, quartz flour, fine silica sand, high-range water reducer, water, and steel or organic fibers. Materials are usually supplied to the precast concrete producer in three components: premix (blended, in-bulk bags); superplas
