Upgrading of normal concrete service life by using SIFCON layers

Abstract

Slurry infiltrated fibrous concrete (SIFCON) is a form of superior performance fiber reinforced concrete made by penetrating steel fiber bed with an exceptionally designed slurry of cement-based. Researches have demonstrated that SIFCON is an imaginative building material having both extensive ductility and high strength. In the current study, the use of SIFCON has been investigated as a strengthening layer for conventional concrete section. The effects of the SIFCON layer position (bottom, top & bottom, and jacket), thickness (1.5, 2.5, and 3.5) cm, and steel fiber volume fraction (6, 7.5, and 9) % on the flexural strength, toughness, and ductility of hybrid prisms were reported. The results showed that the increase in thickness of the SIFCON layer and the steel fiber volume fraction improves load bearing capacity, toughness, and ductility of the composite sections. The maximum ductility and load carrying capacity achieved from the jacketing case. Also, the toughness enhanced greatly in the case of jacketing composite section, it was 23 times higher than that of control prisms.

Experimental Study on the Behavior of Axially Loaded Reinforced Concrete Square Columns Strengthened with SIFCON Shell

“…Prisms coated only from the bottom, from above, and from all sides with different thicknesses (3.5, 2.5, and 1.5) cm and used steel fiber by (6, 7.5, and 9%). The results showed that increasing the thickness of the SIFCON layer and its proportion of steel fiber leads to an improvement in "load bearing capacity, toughness, ductility" where the highest results were obtained when the prism fully strengthened with SIFCON, where it was 23 times higher than control prism [5].…”