Flexural behavior of FA/GGBFS based reinforced geopolymer concrete beams
By: Kumar, Sanjay
.
Contributor(s): Chithambaram, S. Jeeva.
Publisher: Mumbai ACC LTD 2022Edition: Vol.96(7), Jul.Description: 22-27p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: Geopolymers are innovative and eco-friendly construction materials that are produced by the activation of aluminosilicates with alkaline activator solutions. Experimental work is done to create geopolymer concrete using industrial by-products that are readily available locally and to analyse the flexural behavior of GPC that has been cured at room temperature. To enable ambient curing of geopolymer concrete, Fly ash is utilised as the main source material and is partially substituted by 10 percent, 20 percent, 30 percent, and 40 percent ground granulated blast furnace slag (GGBFS) content. Alkaline activator solutions have been created by mixing Sodium silicate (Na2SiO3) with sodium hydroxide (NaOH) in a ratio of 2.5. The qualities of freshly-prepared and hardened geopolymer concrete (GPC) are investigated using the slump test and the compressive strength test. To evaluate the flexural behavior, 150 mm × 200 mm × 1500 mm geopolymer concrete beams were cast, cured at room temperature, and tested after 28 days. According to experimental findings, a GPC mix with a 12 M NaOH concentration and 30 percent GGBFS content as a partial replacement for fly ash had the highest compressive strength of 40 N/mm2. Furthermore, it is evident that the spread of flexural cracks was found to be the cause of the collapse of reinforced geopolymer concrete beams.
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2022-2364 |
Geopolymers are innovative and eco-friendly construction materials that are produced by the activation of aluminosilicates with alkaline activator solutions. Experimental work is done to create geopolymer concrete using industrial by-products that are readily available locally and to analyse the flexural behavior of GPC that has been cured at room temperature. To enable ambient curing of geopolymer concrete, Fly ash is utilised as the main source material and is partially substituted by 10 percent, 20 percent, 30 percent, and 40 percent ground granulated blast furnace slag (GGBFS) content. Alkaline activator solutions have been created by mixing Sodium silicate (Na2SiO3) with sodium hydroxide (NaOH) in a ratio of 2.5. The qualities of freshly-prepared and hardened geopolymer concrete (GPC) are investigated using the slump test and the compressive strength test. To evaluate the flexural behavior, 150 mm × 200 mm × 1500 mm geopolymer concrete beams were cast, cured at room temperature, and tested after 28 days. According to experimental findings, a GPC mix with a 12 M NaOH concentration and 30 percent GGBFS content as a partial replacement for fly ash had the highest compressive strength of 40 N/mm2. Furthermore, it is evident that the spread of flexural cracks was found to be the cause of the collapse of reinforced geopolymer concrete beams.
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