Studies on Properties of Steel Fibre Reinforced Geopolymer Concrete
In this present study, an attempt has been made to examine the influence of volume fractions of steel fibers in geopolymer concrete under different curing conditions on the fresh and mechanical properties. In addition to the compressive strength, workability, split tensile strength, flexural strength, and microstructural properties were also studied. From the test results, it was found that in the heat curing method, there was only a marginal increase in the compressive strength at the age of 28 days when compared to the ambient curing condition. On the other hand, a drastic increase in the compressive strength was found at 3 days because of heat curing due to the high polymerization process. The microstructure investigation illustrated that the fly ash and ground granulated blast furnace slag particles reacted with the alkaline activator solution and formed a denser structure in the heat curing process when compared with the room-cured specimens because of the unreacted particles present in it. The X-ray diffraction pattern shows that the geopolymer particles are crystalline in nature. It was observed that the strength properties such as compressive strength, flexural strength, split tensile and bond strength were increases with the increase in high volume of steel fibers.
Keywords - Polymerization, Mechanical Properties, Fibers, Microstructure, Strength, Bonding.