Quantitative Hydration Analysis of Blast Furnace Slag Cement by Rietveld Method
By Takahiro Sagawa and Toyoharu Nawa
Concrete Research and Technology
Vol.17, No.3, Sep. 2006 (Issue 42)
- Synopsis:
- Blast furnace slag cement pastes were hydrated under different curing temperatures. Hydration ratio of cement compounds and amount of hydration products were determined quantitatively by Rietveld method. Unhydrated slag was crystallized to be tempered the sample, hydration ratio of slag was also determined by Rietveld method. Hydration of slag is progressed until 28days, but practically halted thereafter. Hydration of C3S is accelerated, and hydration of C2S is delayed with the presence of slag. Strength development of mortar can be predicted by using the gel space ratio model. Hydration rate equation of C3S, C2S and slag can be expressed as a function of curing age and temperature.
- Keywords:
- Rietveld method, Blast furnace slag, Cement compound, Hydration ratio, Gel space ratio, Strength, Hydration rate
