材料期刊网

The hydration characteristics by thermal analysis(DTA) were determined,and an isothermal calorimeter(IC) was used to study the pastes.The experimental results indicate: (1)The main hydration products of SSC are C-S-H(Ⅰ) gel with a low Ca/Si ratio, crystalline Thomsonite-type and AFt-type phases containing certain alkali cations; (2)No phases of the AFm-type and high alkaline Ca(OH)2 in SSC system could benefit the hydrated cements to improve its strength and durability; (3) Crystalline Thomsonite-type and AFt-type phases containing Na+ will greatly reduce free alkali and alleviate the harmness of alkali aggregate reaction(AAR) in SSC system; (4)Similar to ordinary Portland cement(OPC), the hydration process of SSC could be classified into five stages: initial, induction, acceleration, deceleration and decay; (5)Regardless of the activator used, the apparent activation energy is higher with the increased slag in cement system, and the rising temperature could promote the hydration of SSC.