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 5°C, 20°C and 40°C. Also, the purpose of this research is (2) to investigate the hydration behavior, compared with 20°C. As a result, in early age at 5°C, only ettringite and C4AH13 are generated without generation of monosulfate, and development of compressive strength of blast furnace cement is different from those at 20°C and 40°C. It is concluded that (1) the reaction ratio of BFS at 5°C is lower, then (2) hydration behavior and hydration products at 5°C are different from those at 20°C and 40°C, finally, (3) pore in the hardened body at 5°C cannot be filled adequately.
