Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Superfine retarded calcium aluminate cement and preparation method thereof
The invention discloses superfine retarded calcium aluminate cement. The specific surface area of the cement is 5510-5540 cm<2>/g, D50 is 1.28-1.45 mu m, D90 is 1.97-2.13 mu m, the maximum particle size is 9.46-10.03 mu m, and the minimum particle size is 0.58-0.76 mu m. According to the invention, studies on the hydration behavior of the superfine calcium aluminate cement show that the times that paste and mortar of the superfine cement begin to release heat and the time that the peak value of hydration heat evolution occurs are all delayed, and the setting time of the mortar is prolonged, i.e. the decrease of the cement particle size has a delay effect on cement hydration, so that the setting of the cement is delayed. Therefore, the superfine retarded calcium aluminate cement can prolong the operable time and stripping time of a combining castable thereof, and in some occasions required to be subjected to long-term construction operation, a longer operable time of the castable can be kept.
Superfine retarded calcium aluminate cement and preparation method thereof
The invention discloses superfine retarded calcium aluminate cement. The specific surface area of the cement is 5510-5540 cm<2>/g, D50 is 1.28-1.45 mu m, D90 is 1.97-2.13 mu m, the maximum particle size is 9.46-10.03 mu m, and the minimum particle size is 0.58-0.76 mu m. According to the invention, studies on the hydration behavior of the superfine calcium aluminate cement show that the times that paste and mortar of the superfine cement begin to release heat and the time that the peak value of hydration heat evolution occurs are all delayed, and the setting time of the mortar is prolonged, i.e. the decrease of the cement particle size has a delay effect on cement hydration, so that the setting of the cement is delayed. Therefore, the superfine retarded calcium aluminate cement can prolong the operable time and stripping time of a combining castable thereof, and in some occasions required to be subjected to long-term construction operation, a longer operable time of the castable can be kept.
Superfine retarded calcium aluminate cement and preparation method thereof
YE GUOTIAN (Autor:in) / WANG YAJUAN (Autor:in) / SHANG XUEJUN (Autor:in) / ZHU LINGLING (Autor:in)
16.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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