Reactivity of Calcined Clays as SCM-A Review.

When looking at the relative compressive strength as a function of the non-clay phases in the raw clay (see Figure 5 , right), it becomes visible that for a low substitution level, the content has a low impact on the reactivity, whereas with a rising substitution, a clear trend of decreasing relative compressive strength with increasing content of non-clay phases can be seen.

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However, there is only a weak trend (rs = −0.20).

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