Mechanical and durability characteristics of flyash and GGBFS based polypropylene fibre reinforced geopolymer concrete

Abstract

The construction sector has been under scrutiny since a long time for its influence in addition to air pollution and global warming. Due to this development and use of sustainable materials such as geopolymers and innovative methods such as CFST for construction has been the forefront of research during recent times. This study investigates the durability and mechanical characteristics of Polypropylene (PP) fiber reinforced geopolymer concrete and its use in Concrete in-Filled Steel Tube (CFST) columns. For the experimental study, PP fibers were added by varying proportions as 0.5%, 1% and 1.5% by mass of binder. The results showed that the mix with 1% PP fibers had the best mechanical and durability characteristics. The square CFST columns of 109 mm × 109 mm × 470 mm dimensions showed consistent failure due to edge weakness. A maximum average axial compressive strength of 43.27 MPa was obtained for the CFST columns.