The efficacy of using SIFCON in the strengthening of reinforced concrete beams containing cold joints
DOI:
https://doi.org/10.62638/ZasMat1683Abstract
The Slurry-infiltrated fiber concrete (SIFCON) is a distinctive form of fiber-reinforced concrete known for its exceptional ductility and superior impact resistance, making it as an ideal material for demanding rehabilitation and strengthen applications in civil engineering. The cold joints in concrete represent the planes of weakness that forms due to delays between successive concrete pours. This study experimentally investigates the efficacy of using SIFCON jackets as a strengthen materials on the performance of beams with horizontal or vertical cold joints at various locations. Two strengthening techniques were adopted: hardened SIFCON jacket or fresh SIFCON jacket, the studied beam specimens were tested by two-point flexural loading to evaluate ultimate load capacity, failure modes, load -deflection behavior, stiffness, ductility, and energy absorption. The results reveal that the presence of cold joints reducing the performance of beamsin comparison to that of reference specimen and such reduction depends on the orientation and location of these joints within the beam. Whereas the experimental results showed that the performance degradation that caused by cold joints addressed by using both fresh or hard SIFCON jackets. Besides, the enhancements of structural properties that achieved by using hard SIFCON jacket are more than that of fresh SIFCON jacket.
Keywords:
RC beams, horizontal cold joint, vertical cold joint, fresh SIFCON jacket, hard SIFCON jacket.References
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