Flexural Strength Study The Deficient RC Slabs Strengthened with HPFRC Different Layers

Many reinforced concrete buildings in the world and Iran, have a life of over several decades And many reasons have been damaged. According to the Replacing these buildings will lead to high costs and is no economic and Environmental feasibility and Due to the need Increasing engineers and construction industry Professionals to strengthen, repair and rehabilitation of concrete structures, Several different methods have been proposed for this issue. One method of strengthening is the approach of using a special concrete With high capabilities. one of these concretes is HPFRCC. Experimental Studies have been carried lately about strengthening with HPFRCC on beams, Columns,slabs and other Structural elements and the strength of this concrete Has been confirmed in strengthening. High performance fiber reinforced cement composite (HPFRCC) is a material that is composed of a cement-based matrix and short composite and steel fibers.that Indicate multiple cracking under tensile stress and because of high bonding strength, HPFRCC used as a repair material. However, the mechanical performance of a RC member repaired with HPFRCC has yet been investigated sufficiently. In this paper, is used layers of HPFRCC (HPFR CC patching)in different thickness for deficient RC slabs Flexural Strengthened and numerical Study HPFRCC layers on this slabs with Finite Element.