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Hybrid reinforcement of steel–polyethylene fibers in cementless ultra-high performance alkali-activated concrete with various silica sand dosages
https://orcid.org/0000-0002-2545-1073
https://orcid.org/0000-0002-4098-5153
https://orcid.org/0000-0003-2814-5482
Graphical abstract Display Omitted
Highlights UHP-AAC incorporating hybrid steel and PE fibers is developed with sufficient strength and ductility. Silica sand reduces the amount of entrained air in UHP-AAC, increasing particle packing density and compressive strength. Increasing PE fiber content and decreasing FA/B ratio improve ductility and cracking behavior of UHP-FRAAC. FA/B ratio have a greater effect on the PSH indices than fiber replacement ratio. The highest complementary energy and index of 119.09 are obtained for PE0.16 specimen.
Abstract The effects of steel and polyethylene (PE) fiber hybrid reinforcement on the mechanical performance of cementless ultra-high performance alkali-activated concrete (UHP-AAC) containing an industrial by-product and various amounts of silica sand were investigated. Replacing steel fibers with PE fibers reduced the compressive and tensile strengths, with the best performance was observed in the hybrid specimens with a medium-grade fine aggregate-to-binder (FA/B) ratio. Increasing the PE fiber replacement ratio and decreasing the FA/B ratio increased the occurrence of multiple microcracks. The FA/B ratio had a greater effect on the variation in the pseudo-strain hardening indices than the fiber replacement ratio. The highest complementary energy, 1,762.5 J/m2, was obtained for PE fiber-reinforced UHP-AAC at an FA/B ratio of 0.16, while the lowest value, 309.6 J/m2, was obtained for steel-fiber-reinforced UHP-AAC at the same FA/B ratio. In conclusion, the hybrid reinforcement of UHP-AAC can be optimized by considering the FA/B ratio and fiber replacement ratio.
Hybrid reinforcement of steel–polyethylene fibers in cementless ultra-high performance alkali-activated concrete with various silica sand dosages
https://orcid.org/0000-0002-2545-1073
https://orcid.org/0000-0002-4098-5153
https://orcid.org/0000-0003-2814-5482
Graphical abstract Display Omitted
Highlights UHP-AAC incorporating hybrid steel and PE fibers is developed with sufficient strength and ductility. Silica sand reduces the amount of entrained air in UHP-AAC, increasing particle packing density and compressive strength. Increasing PE fiber content and decreasing FA/B ratio improve ductility and cracking behavior of UHP-FRAAC. FA/B ratio have a greater effect on the PSH indices than fiber replacement ratio. The highest complementary energy and index of 119.09 are obtained for PE0.16 specimen.
Abstract The effects of steel and polyethylene (PE) fiber hybrid reinforcement on the mechanical performance of cementless ultra-high performance alkali-activated concrete (UHP-AAC) containing an industrial by-product and various amounts of silica sand were investigated. Replacing steel fibers with PE fibers reduced the compressive and tensile strengths, with the best performance was observed in the hybrid specimens with a medium-grade fine aggregate-to-binder (FA/B) ratio. Increasing the PE fiber replacement ratio and decreasing the FA/B ratio increased the occurrence of multiple microcracks. The FA/B ratio had a greater effect on the variation in the pseudo-strain hardening indices than the fiber replacement ratio. The highest complementary energy, 1,762.5 J/m2, was obtained for PE fiber-reinforced UHP-AAC at an FA/B ratio of 0.16, while the lowest value, 309.6 J/m2, was obtained for steel-fiber-reinforced UHP-AAC at the same FA/B ratio. In conclusion, the hybrid reinforcement of UHP-AAC can be optimized by considering the FA/B ratio and fiber replacement ratio.
Hybrid reinforcement of steel–polyethylene fibers in cementless ultra-high performance alkali-activated concrete with various silica sand dosages
https://orcid.org/0000-0002-2545-1073
https://orcid.org/0000-0002-4098-5153
https://orcid.org/0000-0003-2814-5482
Graphical abstract Display Omitted
Highlights UHP-AAC incorporating hybrid steel and PE fibers is developed with sufficient strength and ductility. Silica sand reduces the amount of entrained air in UHP-AAC, increasing particle packing density and compressive strength. Increasing PE fiber content and decreasing FA/B ratio improve ductility and cracking behavior of UHP-FRAAC. FA/B ratio have a greater effect on the PSH indices than fiber replacement ratio. The highest complementary energy and index of 119.09 are obtained for PE0.16 specimen.
Abstract The effects of steel and polyethylene (PE) fiber hybrid reinforcement on the mechanical performance of cementless ultra-high performance alkali-activated concrete (UHP-AAC) containing an industrial by-product and various amounts of silica sand were investigated. Replacing steel fibers with PE fibers reduced the compressive and tensile strengths, with the best performance was observed in the hybrid specimens with a medium-grade fine aggregate-to-binder (FA/B) ratio. Increasing the PE fiber replacement ratio and decreasing the FA/B ratio increased the occurrence of multiple microcracks. The FA/B ratio had a greater effect on the variation in the pseudo-strain hardening indices than the fiber replacement ratio. The highest complementary energy, 1,762.5 J/m2, was obtained for PE fiber-reinforced UHP-AAC at an FA/B ratio of 0.16, while the lowest value, 309.6 J/m2, was obtained for steel-fiber-reinforced UHP-AAC at the same FA/B ratio. In conclusion, the hybrid reinforcement of UHP-AAC can be optimized by considering the FA/B ratio and fiber replacement ratio.
Hybrid reinforcement of steel–polyethylene fibers in cementless ultra-high performance alkali-activated concrete with various silica sand dosages
Kim, Gi Woong (author) / Oh, Taekgeun (author) / Lee, Seung Kyun (author) / Lee, Seung Won (author) / Banthia, Nemkumar (author) / Yu, Eunjong (author) / Yoo, Doo-Yeol (author)
2023-06-17
Article (Journal)
Electronic Resource
English