UHPC has a compressive strength over 150 MPa and uses steel fibers to provide ductility and reduce the need for passive shear reinforcement. It has a high binder content and specially selected aggregates. Example products include BSI, Cemtec, Densit, and Ductal. A typical Ductal mix design contains 6.2% steel fibers, 40.8% fine sand, 28.7% Type V cement, 8.4% quartz flour, 9.3% silica fume, and various admixtures to achieve the high strength and ductility of UHPC.

1. Definition of UHPC (UHPFRC)
• SETRA Guide Specifications
– f’c > 150 MPa (22 ksi)
– Use fiber to ensure ductile
behavior and reduce or
eliminate the need for passive
shear reinforcement
– Have a high binder content and
a special selection of
aggregates
• Example Products
– BSI by Eiffage
– Cemtec by LCPC
– Densit by Aalborg Portland
– Ductal by Lafarge

2. Typical Ductal® Concrete Mix Design
Material Amount
(lb/yd3)
% by Weight
Steel Fibers (0.5” long, 8 mil dia.) 263 6.2
Fine Sand (150 to 600 m) 1720 40.8
Type V Portland Cement (15 m) 1200 28.7
Quartz Flour (10 m) 355 8.4
Silica Fume (~1 m) 390 9.3
Superplasticizer (Glenium 3000NS) 51.8 1.2
Accelerator (Rheocrete CNI) 50.5 1.2
Water 184 4.4