Compression strength of concrete cylinders reinforced with carbon fiber laminate

Composite laminates made from carbon fibers and epoxy resin (CFRP) have been obtained and used as a strengthening of concrete in the form of cylinders. The laminates were made with the use of high-modulus and high-strength carbon fibers. Different types of laminates (1D, 2D) of different thickness were wrapped and glued to the surface of concrete cylinders. The studies were focused on the compressive strength improvement of the cylinders. Compressive strengths and axial strains of unconfined and CRFP-confined concrete cylinders were compared. Compressive strength of concrete cylinders was considerably improved by wrapping the cylinders with the high-strength carbon laminates in the hoop direction.