No abstract

Self-compacting concrete (SCC) is a concrete that has a high flowing ability with no segregation. It is considered to be one of the revolutionary developments in concrete technology in recent times. It reduces noise at sites, precast factory and neighborhood. Self-compacting concrete and glass fibers are combined to create glass fiber reinforced self-compacting concrete (GFRSCC). The present work deals with the workability and strength studies on glass fiber reinforced selfcompacting concrete of grade M40 with fly ash and silica fume. The mix proportions for self-compacting concrete were arrived at by performing mix design and then fine-tuning using EFNARC guidelines. The cement was replaced by 20% fly ash and 12% silica fume by weight. This was kept constant for all the mixes. The glass fiber percentage was varied from 0 to 0.8 % by weight of concrete. Addition of glass fibers increased the 7 days compressive strength compared to the reference mix (mix with no glass fibers) but the increase was not significant. There was moderate (15% to 21 %) increase in 28 days compressive strength when fibers were added relative to the reference mix. Addition of fibers to self-compacting concrete increased the 7 days splitting tensile strength by 13% to 69%. Addition of fibers to self-compacting concrete increased the 28 days splitting tensile strength by 5% to 50%. Addition of fibers to selfcompacting concrete increased the 28 days flexural strength by 30% to 48%. The 7 and 28 days compressive strengths of selfcompacting concrete with glass fibers were maximum at a fiber percentage = 0.3. The 7 and 28 days splitting tensile strengths of self-compacting concrete with glass fibers were maximum at a fiber percentage = 0.4. The 28 days flexural strength of selfcompacting concrete with glass fibers was maximum at a percentage = 0.7.