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Influence of Sucrose on Hydration Process of Portland Cement
The sucrose (0.045%) is added in the cement paste, the consistency of Ca2+ and OH- reduce little, the AFt has high solubility product, thus the AFt exists as gel like product which covers the surface of the clinker particles, the sucrose acts as a retarder. When the dosage of the sucrose is 0.24%, the sucrose poisons the hydration of C2S and C3S markedly, so the consistency of Ca2+ and OH- reduce sharply, the AFt has low solubility product, the needle like AFt form a hydration product network and accelerates the setting process, C2S and C3S cannot yield enough C-S-H, the strength development is baffled. It was supposed that there are two dosage threshold values of sucrose on the hydration process, 0.01% is a retardation threshold value accelerating the formation of Aft, while 0.2% is an acceleration threshold value poisoning the hydration of C3S and C2S.
Influence of Sucrose on Hydration Process of Portland Cement
The sucrose (0.045%) is added in the cement paste, the consistency of Ca2+ and OH- reduce little, the AFt has high solubility product, thus the AFt exists as gel like product which covers the surface of the clinker particles, the sucrose acts as a retarder. When the dosage of the sucrose is 0.24%, the sucrose poisons the hydration of C2S and C3S markedly, so the consistency of Ca2+ and OH- reduce sharply, the AFt has low solubility product, the needle like AFt form a hydration product network and accelerates the setting process, C2S and C3S cannot yield enough C-S-H, the strength development is baffled. It was supposed that there are two dosage threshold values of sucrose on the hydration process, 0.01% is a retardation threshold value accelerating the formation of Aft, while 0.2% is an acceleration threshold value poisoning the hydration of C3S and C2S.
Influence of Sucrose on Hydration Process of Portland Cement
Li, Zheng-Hao (author) / Shen, Wei-Guo (author) / Lan, Qing (author) / Lu, Zi-Li (author) / Cao, Liang-Hong (author) / Xu, Zhi-Yuan (author)
2014
6 Seiten
Conference paper
English
Kristallzucker , Fixierzeit , Schwellenwert , Hydratation , Gift , Beschleunigung , Vergiftung , Portlandzement , Zement , Zementpaste , Gel , Retarder , Nadel
Influence of Sucrose on Hydration Process of Portland Cement
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