Abstract
The mechanical and durability properties of mortar containing sewage sludge ash (SSA) are investigated in this study. The temperatures of 800 °C and 5 h duration were applied for the incineration process of the dried sewage sludge in order to obtain SSA. This SSA can be categorized as Class C pozzolan materials, as it meets the requirements specified by ASTM C618-12a. The compressive strength and water absorption tests were conducted for 7 and 28 days of curing. Interesting findings were observed at age 28 days, where all the SSA mortar (5–20 %) showed the higher strength value as compared to the control mortar. In addition, the SSA10% gave the highest compressive strength value among all, which is 55.94 MPa. The absorption rate at 28 days of all SSA mortar demonstrated a slightly lower value as compared with the control mortar. This explained that SSA has high resistance against durability. SSA5% had recorded the lowest rate of water absorption, which is 61.6 g/100 cm2 at age 28 days. As conclusion, SSA has high prospective to be used as partial replacement for Portland cement with up to 20 % of replacement cement. Therefore, this had built a great contribution to waste minimization.
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Acknowledgments
The authors would like to thank the Faculty of Civil Engineering, UiTM for their great assistance and cooperation in making this research reality. Also acknowledge to the Ministry of Education, Malaysia for the support of Research Acculturation Grant (RAGS) scheme—RAGS/1/2014/TK08/UITM//5.
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Nurul Nazierah, M.Y., Kartini, K., Hamidah, M.S., Nuraini, T. (2016). Compressive Strength and Water Absorption of Sewage Sludge Ash (SSA) Mortar. In: Yusoff, M., Hamid, N., Arshad, M., Arshad, A., Ridzuan, A., Awang, H. (eds) InCIEC 2015. Springer, Singapore. https://doi.org/10.1007/978-981-10-0155-0_19
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