It is so common to see the terms “degree of hydration” and “degree of reaction” in research field of cemetitious material, such as cement or blended cement, especially when we focus on the kinetics.
Here comes the question, what is the difference between the two terms? are they actually the same meaning? I was confused by the two terms when I read a huge number of papers and found not so many researchers make them clear or maybe they do not realize the difference either.
The exact composition of slag varies over a range. In general, factors that determine the suitability of slag for usage in composite cement mainly include the fineness of grinding, glass content and the chemical composition.
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The extent of reaction of limestone with cement clinkers is relatively low than the corresponding values of cement clinkers, the probable cause for this as stated above arise from the low solubility and low reactivity of limestone particles, though other factors of limestone, including fineness, particle size distribution, etc., do have influence on its reaction degree in blended system.
Effects of limestone addition on the hydration of limestone blended cement can be classified into two aspects, viz. physical effects and chemical effects.