|What is Ultra High Performance Steel Fiber Reinforced Concrete (UHPFRC)?|
|Steel Fibers in Concrete|
Advantages of using Steel Fiber Reinforced Concrete
Ultra-High Performance Steel Fiber Reinforced Concrete (UHPFRC)
Definition of Ultra High Performance Fiber reinforced Concrete (UHPFRC)
Ultra-high performance Fiber Reinforced Concrete is a relatively new construction material having minimum coarse aggregate (usually size greater than 6-7 mm is not used) having discrete random steel fibers uniformly distributed across the concrete matrix with the basic strength of above 14,000 psi (100 MPa) in 3 or 4 days that can go upto as high as 25,000 psi at 28 days ultimate cure.
- Although there are many advantages of Ultra-High Performance Fiber Reinforced Concrete but there are limitations as well:-
- There are complications involved in attaining uniform dispersal of fibers and consistent concrete characteristics.
- The use of UHPFRC requires a more precise configuration compared to normal concrete.
- Another problem is that unless steel fibers are added in adequate quantity, the desired improvements cannot be obtained.
- However, as the quantity of fibers is increased, the workability of the concrete is affected. Therefore, special techniques and concrete mixtures are used for steel fibers. If proper techniques and proportions are not used, the fibers may also cause a finishing problem, with the fibers coming out of the concrete.