The Influence of Curing Temperature on Hydrated Products of Blast Furnace Slag Cement and Its Porosity at the Early Stage of Hydration
Tsuyoshi SAITO, Takahisa UCHIDA, Yun sub LEE and Nobuaki OTSUKI
Abstract:This research focuses on (1) the relationship between the development of compressive strength of blast furnace cement and hydrated products, hydration behavior and porosity in early stage at 5C, 20C and 40C. Also, the purpose of this research is (2) to investigate the hydration behavior, compared with 20C. As a result, in early age at 5C, only ettringite and C4AH13 are generated without generation of monosulfate, and development of compressive strength of blast furnace cement is different from those at 20C and 40C. It is concluded that (1) the reaction ratio of BFS at 5C is lower, then (2) hydration behavior and hydration products at 5C are different from those at 20C and 40C, finally, (3) pore in the hardened body at 5C cannot be filled adequately. Key Words:Blast furnace cement, Curing temperature, Early stage of hydration, Porosity, Compressive strength