Laboratory Tests Analysis of Reinforced Concrete Structures Strengthened with CRFP

Abstract

Abstract Modern construction industry is constantly evolving and improving. Therefore, new opportunities are used to solve the constantly emerging new problems. One of the modern innovations in these areas is the use of carbon-fiber nonwoven fabric for strengthening structures and composite materials. Carbon fibers have several advantages in increasing the bearing capacity of the structure: high modulus of elasticity (240-640 GPa) and tensile strength (2500-4000 MPa), minimal coefficient of thermal expansion (approximately 50 times less than steel), high fatigue characteristics, excellent resistance to aggressive environments, withstands many cycles of «freeze-thaw». One of the promising areas for the development for strengthening concrete structures with carbon fiber materials is prestressed carbon fiber reinforced plastic system. This area has a great potential for use in reinforced concrete structures, most often in pavements: to reinforce overloaded elements, external reinforcement of structures with corroded pre-stressed reinforcement, repair of structural nodes. The article reviews and analyzes the laboratory tests result of reinforced concrete structures (slabs and beams), reinforced with prestressed carbon, as well as non-stressed laminates.