RAPID METHOD FOR DETERMINING CALCIUM ALUMINATES IN LINKER

摘要

A method of quantitative determination of calcium aluminates in clinkers is described. A sample weighing 0.25 g is taken from the homogenized clinker, and is shaken in 100 ml of a 5% hot sugar solution for 30 minutes. The solution is filtered, washed eight to ten times with a sugar solution whose concentration is reduced to half of the above concentration, and then washed with distilled water one to two times. The insoluble residue together with the filter is treated with 20 ml of a 20% hot NaOH solution for five minutes. The solution is filtered into the same cone into which the sugar extract was filtered. The solution is washed with warm water eight to ten times. Al sub 2 O sub 3 is determined in the combined filtrates by a complexometric method, and the calcium aluminate value obtained is expressed as C sub 2 A. (ERA citation 03:053188)