Oluwafemi, John and Ofuyatan, Olatokunbo M. and Adedeji, Adeola A. and Bankole, Deborah and Justin, L.D (2023) Reliability assessment of ground granulated blast furnace slag/ cow bone ash- based geopolymer concrete. Journal of Building Engineering, 64 (1).
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Abstract
This study focused on the reliability assessment of ground-granulated blast furnace slag (GGBS) and cow bone ash (CBA) based geopolymer concrete (GPC). To produce the GPC, sodium silicate (Na2SiO3) was mixed with sodium hydroxide of 12M at a 2.5:1 ratio and used as the alkaline activator. The mechanical properties of the GPC were examined at 7, 14, 28, 56, and 90 days of ambient curing. Microstructural analyses were also carried out to investigate the microstructural properties that influence the mechanical performance of the GPC. Following these, a reliability assessment was carried out to establish the reliability of GPC using the constant failure model method. The results of the mechanical tests showed that GPC with GGBS composition that is ≥ 60% and CBA that is ≤ 40% performed better than the conventional concrete. At 28 days of curing, the GPC optimum mix attained a compressive strength of 40.13 MPa against 33.14 MPa attained by the conventional concrete. Also, the reliability analyses established that GPC mixes with GGBS composition that is ≥ 60% and CBA that is ≤ 40% are reliable up to the expected 50 years of service for structures. Hence, GPC is reliable as well as conventional concrete.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Reliability Geopolymer concrete Conventional concrete Service life Wastes Mechanical properties |
| 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: | AKINWUMI |
| Date Deposited: | 23 Oct 2023 11:27 |
| Last Modified: | 23 Oct 2023 11:27 |
| URI: | http://eprints.covenantuniversity.edu.ng/id/eprint/17425 |
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