Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Damage mechanisms of ultra-high-performance concrete under freeze–thaw cycling in salt solution considering the effect of rehydration
https://orcid.org/0000-0002-2716-4430
Highlights UHPC failure mechanisms under freeze–thaw cycling in salt solution were discussed experimentally and theoretically. Rehydration of unhydrated cement under chloride-salt and freeze–thaw cycling was studied. Freezing point of a solution in UHPC pores was calculated mathematically.
Abstract Accelerated freeze–thaw cycling tests in 5.0 wt% NaCl solutions were performed to better understand the durability of ultra-high-performance concrete (UHPC) with a 0.2 water-binder ratio under freeze–thaw cycles in a salt environment (as experienced by concrete used in harsh marine environments). The bound water and pore structure were evaluated before and after cycling. Unhydrated cement rehydrated during the freeze–thaw cycling and hydration products repaired small pores (<100 nm). The ice-formation expansion rates of 0–10 wt% NaCl solutions were determined. The damage mechanisms were discussed considering the supercooling effect and salt concentration. The conclusions of this study are valid for specific properties of UHPC under freeze–thaw cycling in salt solution.
Damage mechanisms of ultra-high-performance concrete under freeze–thaw cycling in salt solution considering the effect of rehydration
https://orcid.org/0000-0002-2716-4430
Highlights UHPC failure mechanisms under freeze–thaw cycling in salt solution were discussed experimentally and theoretically. Rehydration of unhydrated cement under chloride-salt and freeze–thaw cycling was studied. Freezing point of a solution in UHPC pores was calculated mathematically.
Abstract Accelerated freeze–thaw cycling tests in 5.0 wt% NaCl solutions were performed to better understand the durability of ultra-high-performance concrete (UHPC) with a 0.2 water-binder ratio under freeze–thaw cycles in a salt environment (as experienced by concrete used in harsh marine environments). The bound water and pore structure were evaluated before and after cycling. Unhydrated cement rehydrated during the freeze–thaw cycling and hydration products repaired small pores (<100 nm). The ice-formation expansion rates of 0–10 wt% NaCl solutions were determined. The damage mechanisms were discussed considering the supercooling effect and salt concentration. The conclusions of this study are valid for specific properties of UHPC under freeze–thaw cycling in salt solution.
Damage mechanisms of ultra-high-performance concrete under freeze–thaw cycling in salt solution considering the effect of rehydration
https://orcid.org/0000-0002-2716-4430
Highlights UHPC failure mechanisms under freeze–thaw cycling in salt solution were discussed experimentally and theoretically. Rehydration of unhydrated cement under chloride-salt and freeze–thaw cycling was studied. Freezing point of a solution in UHPC pores was calculated mathematically.
Abstract Accelerated freeze–thaw cycling tests in 5.0 wt% NaCl solutions were performed to better understand the durability of ultra-high-performance concrete (UHPC) with a 0.2 water-binder ratio under freeze–thaw cycles in a salt environment (as experienced by concrete used in harsh marine environments). The bound water and pore structure were evaluated before and after cycling. Unhydrated cement rehydrated during the freeze–thaw cycling and hydration products repaired small pores (<100 nm). The ice-formation expansion rates of 0–10 wt% NaCl solutions were determined. The damage mechanisms were discussed considering the supercooling effect and salt concentration. The conclusions of this study are valid for specific properties of UHPC under freeze–thaw cycling in salt solution.
Damage mechanisms of ultra-high-performance concrete under freeze–thaw cycling in salt solution considering the effect of rehydration
An, Mingzhe (Autor:in) / Wang, Yue (Autor:in) / Yu, Ziruo (Autor:in)
Construction and Building Materials ; 198 ; 546-552
22.11.2018
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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