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A platform for research: civil engineering, architecture and urbanism
Physicochemical properties of Portland cement/calcium aluminate cement/calcium sulfate ternary binder exposed to long-term deep-sea conditions
Cementitious materials employed in deep-sea marine engineering must have excellent durability and fast setting for in-situ construction. In this study, the durability of a ternary binder mortar composed of Portland cement, calcium aluminate cement, and anhydrite was investigated after deep-sea exposure at a depth of 1680 m for 608 d and compared to a tap-water-immersed specimen. The recovered mortar showed significant expansion. However, the hydrate phases in the ternary binder exhibited no changes with the exception of the formation of Friedel’s and Kuzel’s salts. One reason for this was the transformation from unstable monosulfate to stable ettringite under low-temperature seawater conditions. However, the additional ettringite formation could lead to significant expansion of the sample and strength reduction.
Physicochemical properties of Portland cement/calcium aluminate cement/calcium sulfate ternary binder exposed to long-term deep-sea conditions
Cementitious materials employed in deep-sea marine engineering must have excellent durability and fast setting for in-situ construction. In this study, the durability of a ternary binder mortar composed of Portland cement, calcium aluminate cement, and anhydrite was investigated after deep-sea exposure at a depth of 1680 m for 608 d and compared to a tap-water-immersed specimen. The recovered mortar showed significant expansion. However, the hydrate phases in the ternary binder exhibited no changes with the exception of the formation of Friedel’s and Kuzel’s salts. One reason for this was the transformation from unstable monosulfate to stable ettringite under low-temperature seawater conditions. However, the additional ettringite formation could lead to significant expansion of the sample and strength reduction.
Physicochemical properties of Portland cement/calcium aluminate cement/calcium sulfate ternary binder exposed to long-term deep-sea conditions
Mater Struct
Kobayashi, Mari (author) / Takahashi, Keisuke (author) / Kawabata, Yuichiro (author) / Bier, Thomas A. (author)
2022-09-01
Article (Journal)
Electronic Resource
English
Durability of portland, calcium aluminate cement, calcium sulfate mixed binder systems
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