GRADING OF WET REGROUND CEMENT

Abstract

Tests show that the specific surface and particle size of wet re ground cement can be determined using the "traditional" methods (Blaine-device, Robinson-Kohn Pipette) if the sample is dehydrated after the grinding. Methods have been developed for the determination of the degree of hydration of the cement pulp and for its dehydration. The wet sample was placed into a sintered glass filter lined with filter paper and a suitable amount of isopropyl alcohol was sucked through it. The alcohol retained was removed subsequently under infrared light.