STUDY OF USE OF DISCONTINUOUS GLASS FIBERS IN PSC SPUN POLE

M.B.Varma, S.T.Patil

Abstract: The experimental study was carried out on the prestressed concrete spun pole. The length prestressed concrete spun pole was 13 meters. Prestressed concrete spun pole was cast at factory with use discontinuous glass fibers in high strength concrete. Glass fibers used were anticrack. Prestressed concrete spun pole without glass fibers was also cast at factory. Dimensions of the pole were outer diameter at top 206 mm and bottom 379 mm. The thickness of pole kept 50~55mm. The investigations were done for spun poles for deflection parameter for different loads at factory. The investigations were also done to study final recovery of the deflection after removal of the load. The horizontal load is applied and increased in specific fraction up to design load and corresponding deflections of the pole were measured. The pattern of surface cracks on the pipe was also observed for comparisons. Final recovery of the deflection is noted for different load; load applied and load removal condition. All above parameters (deflection, crack pattern, recovery) were observed. Considerable improvement in the properties of PSC spun poles such as deflection, recovery after removal of load, increase in the load carrying capacity were observed during practical investigations.

Keywords: PSC, GFRC, Deflection, cracks, Recovery

DOI: https://doi.org/10.15623/ijret.2015.0425057