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Title: | Investigation of hard-burn and soft-burn lime kiln dust as alternative materials for alkali-activated binder cured at ambient temperature |
Authors: | Jitsangiam, P Suwan, T Wattanachai, P Tangchirapat, W Chindaprasirt, P Fan, M |
Keywords: | alkali-activated binder;ambient curing temperature;lime kiln dust;hard-burn LKD;soft-burn LKD |
Issue Date: | 2-Nov-2020 |
Publisher: | Elsevier |
Citation: | Jitsangiam, P. et al. (2020) 'Investigation of hard-burn and soft-burn lime kiln dust as alternative materials for alkali-activated binder cured at ambient temperature', Journal of Materials Research and Technology, 9 (6), pp. 14933 - 14943. doi: 10.1016/j.jmrt.2020.10.069. |
Abstract: | Copyright © 2020 The Author(s). As climate change becomes a severe concern, the development of green technology becomes a goal for many sectors, including the construction material sector. Ordinary Portland cement (OPC), the main constituent of concrete production, is a primary contributor to releasing carbon dioxide (CO2) into the atmosphere. Some alternative cementitious materials have been studied to reduce the massive amount of OPC consumption. Lime kiln dust (LKD), a by-product of quicklime production, is produced in abundance worldwide and mostly disposed of in landfills. The two types of LKD, soft-burn and hard-burn, are high-potential wastes that can be developed as alternative cementitious binders using the alkali-activated binder (AAB) technology. This study investigates the mixture designation and properties of LKD-based AAB when cured at ambient temperature. The results show that an ambient-cured soft-burn LKD-AAB achieved practical workability with an 8 M NaOH solution, 1.50 of sodium silicate-to-sodium hydroxide ratio (SS/SH), and 0.60 of liquid alkaline-to-binder ratio (L/B). A rapid setting behavior and an excellent compressive strength of 10.89 MPa at 28 days were revealed at room temperature curing. The ambient-cured hard-burn LKD-AAB could not provide the appropriate properties. However, the mixture of 20% hard-burn LKD and 80% soft-burn LKD resulted in an LKD-AAB mixture that meets the minimum requirement for low-strength cement applications. The positive outcome of this study may be the solution for of LKD wastes utilization in Thailand that addresses the challenge of developing ambient-cured AAB for in-field applications. |
URI: | https://bura.brunel.ac.uk/handle/2438/26337 |
DOI: | https://doi.org/10.1016/j.jmrt.2020.10.069 |
ISSN: | 2238-7854 |
Other Identifiers: | ORCID iD: Mizi Fan https://orcid.org/0000-0002-6609-3110 |
Appears in Collections: | Dept of Civil and Environmental Engineering Research Papers |
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FullText.pdf | Copyright © 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/). | 2.44 MB | Adobe PDF | View/Open |
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