Table 1 A comparison between HPDC and UHPC.
From: Rebar free high performance ductile concrete beams powered by CFRP and post-tensioning
Property | HPDC | UHPC | Details |
|---|---|---|---|
Matrix composition | Dense, fine-grained matrix, Low w/b ratio | Optimized particle packing matrix, Very low w/b ratio (0.16–0.22) | Matrix composition is fundamentally similar. The key difference often lies in the rigor of particle packing optimization to maximize density. |
Fiber volume fraction | 2.0% | Commonly 2.0% to 3.0% (Can range from 1.5% to 6.0% for particular applications) | Higher volumes are used but can reduce workability. |
Compressive strength | < 100 MPa (e.g., 80–100 MPa) | Typically > 120 MPa, often 150–250 MPa | This is the primary quantitative distinction. |
Post-cracking tensile strength | \(\:\sim\:11\:MPa\) | Typically > 12 MPa, often 15–25 MPa | Almost similar based on the type of fiber. |
Tensile strain capacity | \(\:\sim\:4\%\) | Often > 5%, ranging to 8% and beyond. | High ductility vs. ultra-high ductility. |
