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Effects of 12 Molar Concentration of Sodium Hydroxide on the Compressive Strength of Geopolymer Concrete

Oyebisi, S.O and Ede, A. N. and Ofuyatan, Olatokunbo M. and Alayande, T and Mark, Grace and Jolayemi, Joshua and Ayegbo, Stephen (2018) Effects of 12 Molar Concentration of Sodium Hydroxide on the Compressive Strength of Geopolymer Concrete. In: IOP Conf. Series: Materials Science and Engineering.

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Geopolymer concrete is an emerging and innovative alkali-activated concrete that has been growingly studied because of its superior mechanical strengths and durability properties. This study, therefore, investigates the utilization of both corncob ash (CCA) and ground granulated blast furnace slag (GGBFS) as source materials activating with both sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) solutions in the production of geopolymer concrete (GPC). Sodium hydroxide was prepared in 12 molar concentration using Grade 30 MPa mix design ratio. GGBFS was replaced by CCA in varying percentages 20, 40, 60, 80, and 100% and cured in ambient conditions. Slump, density, and compressive strength of GPC were determined and compared with Portland Cement Concrete (PCC) of the same grade. The research findings indicate an optimal strength of 100% GGBFS with a compressive strength of 43.17MPa at 28 days curing for GPC compared with 35.12MPa for PCC. The result reveals that GPC has better strength than PCC and, CCA and GGBFS can be utilized as aluminosilicate materials to replace cement in the production of GPC.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: geopolymer concrete; corncob ash, ground granulated blast furnace slag;regression model; sodium silicate; sodium hydroxide; compressive strength
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 28 Sep 2018 11:16
Last Modified: 28 Sep 2018 11:16

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