Flexural behavior of T-beams made of high-volume fly ash self-compacting concrete, strengthened with carbon fiber reinforced polymer (CFRP)

This study utilized fly ash, a hazardous B3 waste from coal combustion, as a replacement for a large portion of cement in Self-Compacting Concrete (SCC) to reduce CO2 emissions and environmental problems. The concrete used in this study was High Volume Fly Ash – Self-Compacting Concrete (HVFA-SCC) which the fly ash proportion was 50 %. The HVFA-SCC beam specimen had a T-beam cross section with the web size of 120 mm × 240 mm and the flange size of 80 mm thickness and 440 mm width. There were three types of beam specimens. The first type without CFRP strengthening, the second type was strengthened with one layer of 100 mm width of CFRP, while the third type was strengthened with 50 mm width of CFRP. The beams were tested under monotonic two-points loading. The results show that the HVFA-SCC T-beams with CFRP had smaller deflection compared to the HVFA-SCC T-beams without CFRP. These phenomenon indicated that CFRP increased the HVFA-SCC T-beam ductility and provided better deformation control.