relation: https://khub.utp.edu.my/scholars/20197/ title: Characterization of Fly Ash: Effect on Compressive Strength and Thickening Time of Alkaline-Activated Fly Ash Cement at Downhole Condition creator: Zulkarnain, N.N. creator: Sazali, Y.A. creator: Hamid, A.I.A. creator: Kamizan, N. creator: Rahman, S.H.A. creator: Razak, A.A.A. creator: Habarudin, M.F. description: The construction industry is currently switching to geopolymer cement, a greener product from power plant waste. While the utilization of geopolymer cement in the construction industry is well-known, its application as well cement is still being researched. Current study analyzes fly ash composition from two power plants, Tanjung Bin and Manjung Power Plant, on compressive strength and thickening time under downhole conditions per API RP 10B-2. Findings on compressive strength reveal that silica to alumina ratios of 2.0 to 2.5 resulted in higher compressive strength than ratios of less than 2.0. In addition, compressive strength increases as iron oxide and calcium oxide concentrations increase from 7.79 to 15.9 and 6.73 to 22.2, respectively. Fly ash composition had almost no effect on geopolymer cement thickening time at 60 °C and 2000psi. The thickening time is more likely to be influenced by extrinsic factors, including temperature, pressure, and the presence of a retarder or accelerator. © 2024, Institute of Technology PETRONAS Sdn Bhd. publisher: Springer Science and Business Media Deutschland GmbH date: 2024 type: Article type: PeerReviewed identifier: Zulkarnain, N.N. and Sazali, Y.A. and Hamid, A.I.A. and Kamizan, N. and Rahman, S.H.A. and Razak, A.A.A. and Habarudin, M.F. (2024) Characterization of Fly Ash: Effect on Compressive Strength and Thickening Time of Alkaline-Activated Fly Ash Cement at Downhole Condition. Lecture Notes in Civil Engineering, 324. pp. 107-118. ISSN 23662557 relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184281849&doi=10.1007%2f978-981-99-1111-0_10&partnerID=40&md5=3dae7106e446e5bdb00f3e24e896286d relation: 10.1007/978-981-99-1111-0₁₀ identifier: 10.1007/978-981-99-1111-0₁₀