Method of using cementing composition having improved flow properties

Claim 1

In the method of wet processing cement, comprising the steps of subjecting an aqueous slurry of hydraulic cement presursor solids to flow for the purpose of mixing and transporting said slurry, followed by kiln heating of said slurry, the improvement comprising adding to said slurry, prior to subjecting said slurry to flow, from about 0.01 to about 5.0 percent by weight, based on weight of hydraulic cement on a dry basis, of a polyamidosulfonic compound having recurring units represented by the following formula: ##STR3## wherein R 1 is hydrogen or methyl; R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of hydrogen, phenyl, straight or branched alkyl of from one to twelve carbon atoms, and cycloalkyl of up to six carbon atoms; R 6 is straight or branched alkyl of one to twelve carbon atoms, cycloalkyl of up to six carbon atoms, phenyl, or is absent; A is hydrogen, alkali metal ion or ammonium; and n is an integer of from 2 to about 100, such that the weight average molecular weight of the polyamido-sulfonic compound is from about 200 to about 10,000.