A Study on Hybrid Fiber Reinforced Geopolymer Concrete Short Columns Under Uni- Axial Compression

Abstract

Abstract The existing literature is rich in plain cement concrete short columns, but it is deficient with respect to geopolymer concrete (GPC) short columns with the incorporation of fibers with hybridization. The current investigation focuses to identify and measure the structural performance and behavior of two grades of GPC viz., normal and high strength grade with and without hybrid fibers. Two types of fibers i.e., steel and polypropylene are utilized to prepare the hybrid fiber reinforced GPC (HFRGPC) ranging from 0–2% in the increments of 0.5% coupled with longitudinal reinforcement. A total of 20 short columns (10 circular and 10 square headed) having a height of 1000 mm and sizes of 150 mm dia. and 150x150 mm respectively are prepared and tested for uni axial compression loading. The study results indicated that the circular GPC short columns possess better structural performance at ultimate load in terms of ductility ratio than those of square headed GPC specimens with and without fibers. The significant impacts of fiber volume fraction are investigated and reported. The experimental results of the of short columns showed a good agreement with the theoretical results.