Beneficiated water reducing compositions
AssigneeW.R. Grace & Co.-Conn.
InventorsByong-wa Chun, Benita Dair, Charlotte B. Porteneuve, Ara Avedis Jeknavorian, Josephine Ho-Wah Cheung, Lawrence R. Roberts
Life of this patent
Estimating the term…
Abstract
Exemplary compositions comprise at least one aldopentonic acid, such as xylonic acid; and further comprise a lignin, a lignosulfonic acid or its salt, an additional sugar acid such as a aldohexonic acid or salt, a conventional admixture (such as a polyacrylate superplasticizer, a corrosion inhibitor, a set retard, a set accelerator, etc.), or a mixture thereof. Exemplary methods for obtaining microbiologically or enzymatically converted sugar acids are also described herein.
Claims25
A cementitious composition comprising a hydratable cementitious binder and an additive or admixture composition comprising (A) a first component selected from the group consisting of a lignosulfonic acid or salt thereof and a gluconic acid or salt thereof in an amount no less than 5% and no greater than 90% based on dry weight solids in said additive or admixture composition;
- and (B) a second component comprising xylonic acid or salt thereof in an amount no less than 10% and no greater than 95% based on dry weight solids in said additive or admixture composition.
A method for modifying a hydratable cementitious composition comprising:
- combining with a cementitious material an additive or admixture composition comprising (A) a first component selected from the group consisting of a lignosulfonic acid or salt thereof and a gluconic acid or salt thereof in an amount no less than 5% and no greater than 90% based on dry weight solids in said additive or admixture composition, and (B) a second component comprising xylonic acid or salt thereof in an amount no less than 10% and no greater than 95% based on dry weight solids in said additive or admixture composition.
Dependencies are inferred from the claim text.