Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortar
Abstract The main objective of this study is to clarify the effect of bottom ash (BA) powder replacement rate, water-cement ratio, and sand-cement ratio on alkali-activated slag mortar (AASM) by comprehensively investigating the following parameters: fluidity, consistency, setting time, pH, compress...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-02-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-87552-0 |
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| author | Cheng Wang Xiao Zhao Jianjun Zhao Xiyu Zhang Xuejin Ying Xiangde Li |
| author_facet | Cheng Wang Xiao Zhao Jianjun Zhao Xiyu Zhang Xuejin Ying Xiangde Li |
| author_sort | Cheng Wang |
| collection | DOAJ |
| description | Abstract The main objective of this study is to clarify the effect of bottom ash (BA) powder replacement rate, water-cement ratio, and sand-cement ratio on alkali-activated slag mortar (AASM) by comprehensively investigating the following parameters: fluidity, consistency, setting time, pH, compressive strength, and flexural strength, as well as observing the microstructure by XRD and SEM. Finally, the relationship between the parameters was explored by means of correlation coefficient heatmaps in concert with scatter plots (including quadratic polynomial linear fitting). The results show that it is feasible to use up to 60% of BA powder to replace slag for AASM. Meanwhile, it is suggested that the AASM with a water-cement ratio of 0.44 and a sand-cement ratio of 2.6 can obtain better workability, mechanical properties, and a denser microstructure. The incorporation of BA powder produces the unique hydration product Magadiite. In addition, the mechanical models of compressive strength and flexural strength of AASM were proposed $$y = 0.23 \cdot x^{{0.82}} ,$$ $$\:{R}^{2}=0.86$$ . This study provides a reference for the application of BA powder in the alkali-activated system, which is beneficial for resource recycling. |
| format | Article |
| id | doaj-art-8d6bad0617b54975aede830e93dbce86 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-8d6bad0617b54975aede830e93dbce862025-02-09T12:32:43ZengNature PortfolioScientific Reports2045-23222025-02-0115112210.1038/s41598-025-87552-0Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortarCheng Wang0Xiao Zhao1Jianjun Zhao2Xiyu Zhang3Xuejin Ying4Xiangde Li5State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of TechnologyState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of TechnologyState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of TechnologyState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of TechnologyState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of TechnologyState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of TechnologyAbstract The main objective of this study is to clarify the effect of bottom ash (BA) powder replacement rate, water-cement ratio, and sand-cement ratio on alkali-activated slag mortar (AASM) by comprehensively investigating the following parameters: fluidity, consistency, setting time, pH, compressive strength, and flexural strength, as well as observing the microstructure by XRD and SEM. Finally, the relationship between the parameters was explored by means of correlation coefficient heatmaps in concert with scatter plots (including quadratic polynomial linear fitting). The results show that it is feasible to use up to 60% of BA powder to replace slag for AASM. Meanwhile, it is suggested that the AASM with a water-cement ratio of 0.44 and a sand-cement ratio of 2.6 can obtain better workability, mechanical properties, and a denser microstructure. The incorporation of BA powder produces the unique hydration product Magadiite. In addition, the mechanical models of compressive strength and flexural strength of AASM were proposed $$y = 0.23 \cdot x^{{0.82}} ,$$ $$\:{R}^{2}=0.86$$ . This study provides a reference for the application of BA powder in the alkali-activated system, which is beneficial for resource recycling.https://doi.org/10.1038/s41598-025-87552-0Bottom ash powder replacement rateWater-cement ratioSand-cement ratioAlkali-activated slag mortar |
| spellingShingle | Cheng Wang Xiao Zhao Jianjun Zhao Xiyu Zhang Xuejin Ying Xiangde Li Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortar Scientific Reports Bottom ash powder replacement rate Water-cement ratio Sand-cement ratio Alkali-activated slag mortar |
| title | Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortar |
| title_full | Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortar |
| title_fullStr | Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortar |
| title_full_unstemmed | Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortar |
| title_short | Effect of bottom ash powder replacement rate, water cement ratio and sand cement ratio on alkali activated slag mortar |
| title_sort | effect of bottom ash powder replacement rate water cement ratio and sand cement ratio on alkali activated slag mortar |
| topic | Bottom ash powder replacement rate Water-cement ratio Sand-cement ratio Alkali-activated slag mortar |
| url | https://doi.org/10.1038/s41598-025-87552-0 |
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