Experimental Strengthening of Deficient RC Beams with Advanced HPFRCC Composite Layers Reinforced with PP Fibers

The old existing structures and design and construction deficiency are the main to concentrated on using high performance fiber composite HPFRCC for strengthening, Nowadays. Because of increasing demands at the construction industry, it is required to using new material with high quality in this regards. Therefore based on necessities in our country for having high performance composite materials such as HPFRCC, this material are spreadly using as strengthening materials. The main research issues in this regards is on composite ingredients and design mixes, stress-strain curves and material behavior. Even though some structural application are conducted on HPFRCC material (Alwan, 1994; Naaman, 2005), it is required to performing new experimental and analytical researches on material mixes with different fibers and percentages and flexural behavior of reinforced concrete specimens strengthened with this material and their durable performance (Hemmati, 2016; Ehsani, 2019). The effect of structural performance and different arrangements of new material layers of this advanced material on five strengthened reinforced concrete beams was experimentally investigated in this paper and their results were compared to each other’s.