Mechanisms and effects of additives from the dihydroxy-compound class on Portland cement grinding

摘要

The present paper investigates the action andeffects of wet surface active additives from the dihydroxy-compound class (ethylene glycol, propylene glycol, andpolypropylene glycol) on Portland cement grinding, starting fromthe present knowledge of surface chemistry, with application tothe solids and particularly the size reduction process. Theinvestigations were performed using the comparative kineticmeasurements of the size reduction process, aiming at theevolution in time of t he specific surface of the solid; the grindingaptitude measurements, considered as specific powerconsumption, under comparable condition; size distribution andflow capacity determinations of the ground cements. Within thehomologous series of surfactants, the regularity of the additive'seffect on the process, which is dependent on the composition ofthe additives, is noted. The action mechanisms of the additivesare discussed. The results obtained have obvious useful implications.