Mechanical Properties of Steel and Polypropylene Fiber Reinforced Geopolymer Concrete
Authors
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Department of Civil Engineering, Jyothy Institute of Technology, Bengaluru, Karnataka ,IN
Bhargavi C -
Department of Civil Engineering, Jyothy Institute of Technology, Bengaluru, Karnataka ,INSreekeshava K S
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Department of Civil Engineering, Ramaiah Institute of Technology, Bengaluru, Karnataka ,INPrashant Sunagar
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Department of Civil Engineering, BMS College of Engineering, Bengaluru, Karnataka ,INManishh S Dharek
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Department of Civil Engineering, Jyothy Institute of Technology, Bengaluru, Karnataka ,INGanesh C R
Keywords:
Steel Fiber, Polypropylene Fiber, GGBS, Geopolymer Concrete, SEM Analysis, Alkali ActivatorAbstract
Fiber reinforced geopolymer concrete using granulated blast furnace slag, activated with alkali solution and incorporating different quantity of polypropylene fiber (PF) and steel f iber (SF) was studied in this research. A group of control mixtures was prepared with volume fraction of 0% fibers. A second batch of mixtures with volume fraction of 0.5%,1% and 1.5% of PF and SF was used to observe the effect of the fibers on various mechanical properties. Compressive strength test results showed that introducing steel fibers at volume fraction of 1.5% showed the highest compressive strength and same quantity of polypropylene fiber exhibited lower strength. The results indicated that as quantity of fibers in the binder increased, there was a reduction in workability of the mixture. It was seen that inclusion of polypropylene fibers with the binder changes the pattern of failure from brittle to ductile, an advantageous property in engineering applications. Incorporation of polypropylene fibers did not change the elastic modulus due to the possibility of entrapped voids which may have occurred because of fiber balls formed during mixing. Scanning electron microscopy analysis was performed which exhibited the bonding and mechanism of crack propagation based on micromorphology.
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