A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Synergistic effect of silica fume and ultra-fine glass microsphere on macro properties and hydration of coarse-aggregate UHPC
https://orcid.org/0000-0002-0984-9444
Highlights A coarse-aggregate UHPC with SF and UGM was developed; Adding SF and UGM enhances the flexural strength and chloride penetration resistance; UGM exhibits higher reactivity than FA and contributes more to the binder hydration; Combination of SF and UGM further improves the hydration degree and reduces porosity.
Abstract This study investigated the synergistic effect of silica fume (SF) and ultrafine glass microspheres (UGM) in coarse-aggregate ultra-high performance concrete (CA-UHPC). Comprehensive assessments were conducted on macro properties, encompassing fluidity, mechanical properties, dry shrinkage, and chloride penetration resistance, while the hydration process was analyzed through the hydration heat, hydration products, and microstructure. The findings reveal that the fluidity of CA-UHPC exhibits a diminishing trend with escalating SF content but significantly improves with the incorporation of UGM. CA-UHPC containing 8 % SF attains the highest 28-day compressive strength of 166.9 MPa, while further increasing in SF content leads to reduced compressive strength. The introduction of SF and UGM effectively enhances the flexural strength by fostering stronger bonding between fibers and the matrix. Both SF and UGM increase dry shrinkage but enhance chloride penetration resistance. Notably, the combined use of SF and UGM significantly reduces the DRCM by 66.7 %. SF reduces the heat release during the acceleration stage and consumes more Ca(OH)2 than generated by Portland cement hydration, while UGM exhibits higher reactivity than FA and contributes more to the binder hydration. The combination of SF and UGM further improves the hydration degree and reduces porosity, resulting in a finer pore structure. This study underscores the advantages of incorporating SF and UGM in CA-UHPC, providing valuable insights for future research and applications in the field of UHPC.
Synergistic effect of silica fume and ultra-fine glass microsphere on macro properties and hydration of coarse-aggregate UHPC
https://orcid.org/0000-0002-0984-9444
Highlights A coarse-aggregate UHPC with SF and UGM was developed; Adding SF and UGM enhances the flexural strength and chloride penetration resistance; UGM exhibits higher reactivity than FA and contributes more to the binder hydration; Combination of SF and UGM further improves the hydration degree and reduces porosity.
Abstract This study investigated the synergistic effect of silica fume (SF) and ultrafine glass microspheres (UGM) in coarse-aggregate ultra-high performance concrete (CA-UHPC). Comprehensive assessments were conducted on macro properties, encompassing fluidity, mechanical properties, dry shrinkage, and chloride penetration resistance, while the hydration process was analyzed through the hydration heat, hydration products, and microstructure. The findings reveal that the fluidity of CA-UHPC exhibits a diminishing trend with escalating SF content but significantly improves with the incorporation of UGM. CA-UHPC containing 8 % SF attains the highest 28-day compressive strength of 166.9 MPa, while further increasing in SF content leads to reduced compressive strength. The introduction of SF and UGM effectively enhances the flexural strength by fostering stronger bonding between fibers and the matrix. Both SF and UGM increase dry shrinkage but enhance chloride penetration resistance. Notably, the combined use of SF and UGM significantly reduces the DRCM by 66.7 %. SF reduces the heat release during the acceleration stage and consumes more Ca(OH)2 than generated by Portland cement hydration, while UGM exhibits higher reactivity than FA and contributes more to the binder hydration. The combination of SF and UGM further improves the hydration degree and reduces porosity, resulting in a finer pore structure. This study underscores the advantages of incorporating SF and UGM in CA-UHPC, providing valuable insights for future research and applications in the field of UHPC.
Synergistic effect of silica fume and ultra-fine glass microsphere on macro properties and hydration of coarse-aggregate UHPC
https://orcid.org/0000-0002-0984-9444
Highlights A coarse-aggregate UHPC with SF and UGM was developed; Adding SF and UGM enhances the flexural strength and chloride penetration resistance; UGM exhibits higher reactivity than FA and contributes more to the binder hydration; Combination of SF and UGM further improves the hydration degree and reduces porosity.
Abstract This study investigated the synergistic effect of silica fume (SF) and ultrafine glass microspheres (UGM) in coarse-aggregate ultra-high performance concrete (CA-UHPC). Comprehensive assessments were conducted on macro properties, encompassing fluidity, mechanical properties, dry shrinkage, and chloride penetration resistance, while the hydration process was analyzed through the hydration heat, hydration products, and microstructure. The findings reveal that the fluidity of CA-UHPC exhibits a diminishing trend with escalating SF content but significantly improves with the incorporation of UGM. CA-UHPC containing 8 % SF attains the highest 28-day compressive strength of 166.9 MPa, while further increasing in SF content leads to reduced compressive strength. The introduction of SF and UGM effectively enhances the flexural strength by fostering stronger bonding between fibers and the matrix. Both SF and UGM increase dry shrinkage but enhance chloride penetration resistance. Notably, the combined use of SF and UGM significantly reduces the DRCM by 66.7 %. SF reduces the heat release during the acceleration stage and consumes more Ca(OH)2 than generated by Portland cement hydration, while UGM exhibits higher reactivity than FA and contributes more to the binder hydration. The combination of SF and UGM further improves the hydration degree and reduces porosity, resulting in a finer pore structure. This study underscores the advantages of incorporating SF and UGM in CA-UHPC, providing valuable insights for future research and applications in the field of UHPC.
Synergistic effect of silica fume and ultra-fine glass microsphere on macro properties and hydration of coarse-aggregate UHPC
Zhao, Yasong (author) / Qi, Yue (author) / Chen, Gaofeng (author) / Li, Shujun (author) / Liu, Cheng (author) / Gao, Jianming (author)
2023-10-05
Article (Journal)
Electronic Resource
English
Partial substitution of silica fume with fine glass powder in UHPC: Filling the micro gap
| Online Contents | 2017
Partial substitution of silica fume with fine glass powder in UHPC: Filling the micro gap
| British Library Online Contents | 2017
UHPC Puzzolanic reaction of silica fume in Ultra-High Performance Concrete
| British Library Conference Proceedings | 2010
UHPC Effect Of Superplasticizer And Silica Fume On Mixing And Workability Of UHPC
| British Library Conference Proceedings | 2010