W. R. Grace Co.

W. R. Grace Co.-Conn.

Frank G Serafin

Neal Steven Berke

Felek Jachimowicz

Paul J Sandberg

Josephine H Cheung

David F Myers

Peter V Coveney

Robert W Previte

Fulvio J Tang

David L Kantro

Joanna D Blanchard

Nathan R Greening

A novel methodology for rapid, cost-efficient discovery, identification, or improvement of additives and/or admixtures for hydratable cementitious compositions. Multiple formulations comprising hydratable cementitious compositions are deposited into a plurality of receptacles. A first assay output is obtained, such as through x-ray diffraction, which is then correlated to provide a second assay output value corresponding to physical or chemical properties of the cementitious compositions.

Assay methods for hydratable cementitious compositions

Hydraulic cements such as Portland cement are interground with diesters formed by reacting a polyol (e.g. alkylene glycol) with a monobasic carboxylic acid (e.g. acetic acid) to enhance the efficiency of the grinding operation.

Method of grinding a hydraulic cement

Grinding aids for hydraulic cement

Disclosed herein are gypsum-free cement compositions comprising portland cement, limestone and an amine salt of formic or acetic acid. The compositions exhibit compressive strength comparable to ordinary portland cement compositions containing gypsum and the setting properties of the compositions can be regulated.

Gypsum-free cement compositions

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Peabody, MA, United States of America

Frank G Serafin