Fatigue behaviour of low concentration AAS, Fly ash based fibre reinforced geopolymer concrete

Civil Engineering

This Project work is an integral attempt to find the ever increasing emphasis on energy conservation and environmental protection that has led to the investigation of alternatives to customary building materials. This research report presents the study on the development of strength for M40 grade of geopolymer concrete at ambient curing. Trial mix was chosen for low calcium fly ash and slag based geopolymer concrete using mix design reported in the research report. The concentration of the sodium hydroxide solution used was as low as a molarity of 5 Molar, the alkaline solution used in the study is a combination of sodium silicate and sodium hydroxide solution with the ratio of 1:2. An experimental study was conducted to assess the fracture properties of fibre reinforced geopolymer concrete beams. Crimped steel fibres with an aspect ratio of 65 were also added in percentages of 0.5 % and 1.0 % to enhance tensile, shear and ductile behaviour of the members. From the experimental investigation conducted in this research programme and based on the overall performance of the new concrete mixture, it is concluded that various characteristics of GPC posses a high potential to be an alternative structural material because they are not only environmental friendly but also possess adequate mechanical and durability properties.

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