Author : S. S. Patil and A. A. Patil

This paper presents results of an experimental program to determine mechanical properties of Polypropylene Fibre Reinforced Geopolymer Concrete (PFRGPC) which contains fly ash, alkaline liquids, fine & course aggregates & polypropylene fibers. The effects of inclusion of polypropylene fibers on compressive strength, split up tensile strength & flexural strength of hardened geopolymer concrete (GPC) composite was studied. Alkaline liquids to fly ash ratio were fixed as 0.5 with 100% replacement of ordinary portland cement (OPC) by fly ash. Alkaline liquid consists of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) solutions. The ratio of Sodium hydroxide solution to Sodium silicate solution was fixed to 2.50. Polypropylene fibers were added to the mix in two different lengths of 12mm and 20mm and also the hybridization of both polypropylene fibers was mixed in volume of concrete. Based on the test results, it was observed that the PFRGPC have relatively higher strength than GPC & OPC concrete.

Keywords: Geopolymer, Polypropylene, Workability, Compressive Strength, Flexural Strength, Split Tensile Strength

Article published in International Journal of Current Engineering and Technology, Vol.5, No.4 (Aug-2015)