AN EXPERIMENTAL INVESTIGATION ON CONFINED HYBRID GEO-POLYMER CONCRETE

Satish.D, Ramesh Manoli, Shiva Kumar KS

Abstract: Composite columns have been utilized in construction for a few decades. Where in concrete encased column construction steel have been the commonly used has confinement. However it has been expensive for low cost housing and steel is faced through problems like corrosion particularly while used in corrosive environment. Where Unplasticised Poly Vinyl Chloride (UPVC) tubes can be utilized for low cost housing because of their low self weight and economy. UPVC pipes are locally available for piping work; is future to be studied for its effectiveness can be utilized as columns. This form of columns is normally referred to as Concrete Filled UPVC Tube (CFUPVC).Where other different confinement materials like GFRP and Jute fiber have become a popular in retrofit technique, It has been compared with unconfined specimen. However, unconfined Geopolymer concrete (UGPC) exhibits much higher levels of brittleness compared to OPC concrete. Ductility of geopolymer concrete (GPC) can be increased by lateral confinement. Geopolymer concrete (GPC) without fibers and with fibers (GPCF) has been used to fill GPC in UPVC, GFRP and jute fiber specimens, The UPVC specimen had outer diameters of 160 mm, 110 mm and 90 mm and length of 300mm constant, all the specimens were subjected to axial compressive loads, therefore as to calculate the outcome of confinement on the axial load carrying capacity and the failure modes were discussed thoroughly. The results show superior performance by UPVC -GPC, GFRP-GPC as well as jute FRP-GPC confined specimens as compared to UGPC and flexural test was performed specimen had dimension of 110mm diameter and 600mm length. Results showed that Confined geopolymer concrete (CGPC) is effective in confining concrete, while in all cases fcc/fco>1. The Confined strength values increased between 1.26 to 3.39 times the unconfined strength values (UGPC). There is enormous potential of UPVC tubes for use in composite systems as illustrated by this research. The resultant is a cheap, more economical type of column for light weight construction. GFRP and Jute fiber GPC and GPCF demonstrated the same flexural behaviour while UPVC-GPCF attained even higher ultimate flexural load than the unconfined specimen. The study shows more preponderant potentiality of plastics as concrete confinement construction materials of future.

Keywords: UPVC, Geopolymer Concrete, GFRP, Jute Fiber and Confined Specimen.

DOI: https://doi.org/10.15623/ijret.2016.0507010