A series of polyol compounds was investigated to establish the potential usefulness of these materials as cement grinding additives. Measurement of the cement powder fluidity induced by these compounds showed that very substantial fluidity improvements can be achieved with low molecular weight 1,2-diols, the effect being strongly dependent on the aliphatic groups of the diol molecules. Such molecules can thus promote the dispersion of cement particles, as required to improve the efficiency of clinker grinding processes. From calorimetric measurements of the heat of cement hydration, the polyols tested were also shown to exert a moderate acceleration of the hydration reactions. Hence, selected polyol-type compounds can be useful in cement grinding aid formulations which simultaneously aim to improve grinding efficiency and control cement hydration behaviour.
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