Nanoproperties of Fly Ash based Geopolymer Concrete with Polypropylene Fibres
Keywords:Alkali Activated Cement, Fly Ash, Polypropylene Fibres, Structural Properties
Geopolymer concrete (GPC) shows high quasi-brittle behaviour because of the amorphous like characteristics. Resent finding have indicated that polypropylene fibre can be used as an additive to improve the strength of concrete material. In this present work a novel, polypropylene fibre modified geopolymer concrete (FGPC) were prepared as a substitute for conventional cement concrete. The nanoproperties of the polypropylene fibre modified geopolymer concrete were characterized using FT-IR, XRD, SEM and BET adsorption-desorption isotherm model. The developed concrete has the probable maximum compressive strength. FGPC pore volume was reduced by 0.025705 cm3/g and decrease the water absorption compared to Ordinary Portland Cement (OPC) and GPC. SEM image of FGPC has a dense material than OPC and GPC. The use of polypropylene fibre increases the strength of geopolymer concrete through the matrix bonding between the material and it was further confirmed by FTIR technique. The existence of microcracks on the surface of OPC and GPC diminishes the compressive strength and increase the water absorption and porosity.
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