Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ash
Ground granulated blast-furnace slag (GGBFS) and fly ash (FA) were used as precursors to prepare Engineered Geopolymer Composite (EGC) based on the binary binder system, and the effects of GGBFS content and curing time on the mechanical properties as well as the microstructure were investigated. Res...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001668 |
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| author | Xinhua Cai Jinjing Yin Xian Xu Duo Zhang Yamin Wang |
| author_facet | Xinhua Cai Jinjing Yin Xian Xu Duo Zhang Yamin Wang |
| author_sort | Xinhua Cai |
| collection | DOAJ |
| description | Ground granulated blast-furnace slag (GGBFS) and fly ash (FA) were used as precursors to prepare Engineered Geopolymer Composite (EGC) based on the binary binder system, and the effects of GGBFS content and curing time on the mechanical properties as well as the microstructure were investigated. Results showed that the increase of GGBFS content enhanced the yield stress and plastic viscosity of the fresh EGC mixtures, manifesting a more noticeable shear thickening behavior. As the GGBFS content increased, the compressive strength of EGC was found to rise monotonically, while the tensile characteristics changed slightly, exhibiting distinct strain hardening behavior that contributes to the crack control capacity and tensile ductility. It needs to be pointed out that, all EGC groups in this work exhibited high tensile ductility (ultimate tensile strain >4%), high tensile strength (between 4.4 and 6.8 MPa), and good crack control capacity (an average crack width below 90 μm). Furthermore, SEM-EDS results indicated that the incorporation of GGBFS caused a shift from N-A-S-H to C-A-S-H gels, with an increase in Ca/Si, while Al/Si remained at the same level. The findings of this paper are anticipated to promote EGC's practical applications by guiding the material optimization for enhanced technical performance and sustainability. |
| format | Article |
| id | doaj-art-5cad7c092058465db723ef6776c3987f |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-5cad7c092058465db723ef6776c3987f2025-01-27T04:22:00ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013519962010Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ashXinhua Cai0Jinjing Yin1Xian Xu2Duo Zhang3Yamin Wang4State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, Hubei, 430072, PR China; Corresponding author.State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, Hubei, 430072, PR ChinaState Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, Hubei, 430072, PR ChinaState Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, Hubei, 430072, PR China; Corresponding author.TianJin Research Institute for Water Transport Engineering, Ministry of transport, Tianjin, 300456, PR ChinaGround granulated blast-furnace slag (GGBFS) and fly ash (FA) were used as precursors to prepare Engineered Geopolymer Composite (EGC) based on the binary binder system, and the effects of GGBFS content and curing time on the mechanical properties as well as the microstructure were investigated. Results showed that the increase of GGBFS content enhanced the yield stress and plastic viscosity of the fresh EGC mixtures, manifesting a more noticeable shear thickening behavior. As the GGBFS content increased, the compressive strength of EGC was found to rise monotonically, while the tensile characteristics changed slightly, exhibiting distinct strain hardening behavior that contributes to the crack control capacity and tensile ductility. It needs to be pointed out that, all EGC groups in this work exhibited high tensile ductility (ultimate tensile strain >4%), high tensile strength (between 4.4 and 6.8 MPa), and good crack control capacity (an average crack width below 90 μm). Furthermore, SEM-EDS results indicated that the incorporation of GGBFS caused a shift from N-A-S-H to C-A-S-H gels, with an increase in Ca/Si, while Al/Si remained at the same level. The findings of this paper are anticipated to promote EGC's practical applications by guiding the material optimization for enhanced technical performance and sustainability.http://www.sciencedirect.com/science/article/pii/S2238785425001668GeopolymerHigh tensile ductilityDirect tensile testAlkali activationGGBFSFly ash |
| spellingShingle | Xinhua Cai Jinjing Yin Xian Xu Duo Zhang Yamin Wang Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ash Journal of Materials Research and Technology Geopolymer High tensile ductility Direct tensile test Alkali activation GGBFS Fly ash |
| title | Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ash |
| title_full | Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ash |
| title_fullStr | Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ash |
| title_full_unstemmed | Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ash |
| title_short | Rheological, mechanical, and microstructural properties of engineered geopolymer composite (EGC) made with ground granulated blast furnace slag (GGBFS) and fly ash |
| title_sort | rheological mechanical and microstructural properties of engineered geopolymer composite egc made with ground granulated blast furnace slag ggbfs and fly ash |
| topic | Geopolymer High tensile ductility Direct tensile test Alkali activation GGBFS Fly ash |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001668 |
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