Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting Concrete
This study investigates the feasibility of utilizing finely ground coal bottom ash (FGCBA) as a supplementary cementitious material in self-compacting concrete (SCC), with an emphasis on its technical performance and environmental implications. Cement was partially replaced by FGCBA and fly ash (FA)...
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MDPI AG
2025-04-01
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| Online Access: | https://www.mdpi.com/2075-5309/15/9/1509 |
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| author | Chun-Wei Chuang Tai-An Chen |
| author_facet | Chun-Wei Chuang Tai-An Chen |
| author_sort | Chun-Wei Chuang |
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| description | This study investigates the feasibility of utilizing finely ground coal bottom ash (FGCBA) as a supplementary cementitious material in self-compacting concrete (SCC), with an emphasis on its technical performance and environmental implications. Cement was partially replaced by FGCBA and fly ash (FA) at 20%, 40% and 60% substitution rates under water-to-binder (W/B) ratios of 0.4, 0.45 and 0.5. A comprehensive evaluation of the properties of fresh and hardened concrete—including slump flow, setting time, compressive strength, air content, chloride ion permeability and water absorption—was conducted. The results indicate that FA improves workability and enhances long-term strength development, while FGCBA—despite its lower early-age strength—significantly improves durability, particularly in terms of chloride resistance and microstructural densification. These findings underscore the potential of FGCBA as a viable low-carbon alternative in cementitious systems, contributing to resource efficiency and the achievement of circular economy objectives in the construction sector. |
| format | Article |
| id | doaj-art-93a432be522d4cea8fa710b475bbda7b |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-93a432be522d4cea8fa710b475bbda7b2025-08-20T02:30:46ZengMDPI AGBuildings2075-53092025-04-01159150910.3390/buildings15091509Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting ConcreteChun-Wei Chuang0Tai-An Chen1Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung City 202, TaiwanAstray Limited Company, Taipei City 105, TaiwanThis study investigates the feasibility of utilizing finely ground coal bottom ash (FGCBA) as a supplementary cementitious material in self-compacting concrete (SCC), with an emphasis on its technical performance and environmental implications. Cement was partially replaced by FGCBA and fly ash (FA) at 20%, 40% and 60% substitution rates under water-to-binder (W/B) ratios of 0.4, 0.45 and 0.5. A comprehensive evaluation of the properties of fresh and hardened concrete—including slump flow, setting time, compressive strength, air content, chloride ion permeability and water absorption—was conducted. The results indicate that FA improves workability and enhances long-term strength development, while FGCBA—despite its lower early-age strength—significantly improves durability, particularly in terms of chloride resistance and microstructural densification. These findings underscore the potential of FGCBA as a viable low-carbon alternative in cementitious systems, contributing to resource efficiency and the achievement of circular economy objectives in the construction sector.https://www.mdpi.com/2075-5309/15/9/1509self-compacting concrete (SCC)finely ground coal bottom ash (FGCBA)fly ash (FA)cement replacementcompressive strengthdurability |
| spellingShingle | Chun-Wei Chuang Tai-An Chen Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting Concrete Buildings self-compacting concrete (SCC) finely ground coal bottom ash (FGCBA) fly ash (FA) cement replacement compressive strength durability |
| title | Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting Concrete |
| title_full | Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting Concrete |
| title_fullStr | Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting Concrete |
| title_full_unstemmed | Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting Concrete |
| title_short | Evaluating Finely Ground Coal Bottom Ash for Property Self-Compacting Concrete |
| title_sort | evaluating finely ground coal bottom ash for property self compacting concrete |
| topic | self-compacting concrete (SCC) finely ground coal bottom ash (FGCBA) fly ash (FA) cement replacement compressive strength durability |
| url | https://www.mdpi.com/2075-5309/15/9/1509 |
| work_keys_str_mv | AT chunweichuang evaluatingfinelygroundcoalbottomashforpropertyselfcompactingconcrete AT taianchen evaluatingfinelygroundcoalbottomashforpropertyselfcompactingconcrete |