W. R. Grace Co.-conn.

Craig T Walloch

Chia-Chih Ou

Awdhoot V Kerkar

Ara A Jeknavorian

Cynthia Louise Ebner

Kati Hazrati

David Chin

Milind V Karkare

Bahram Siadat

A masonry concrete, for use in making segmental retaining wall units, pavers, blocks, and the like, having zero slump and incorporating betaine for improving freeze-thaw durability, and optionally efflorescent control agents and/or water reducer agents. Exemplary admixtures and methods of improving the freeze-thaw durability of masonry units are also disclosed.

Masonry blocks and masonry concrete admixture for improved freeze-thaw durability

Additive which simultaneously provides water-repellency and flexural bond strength improvement in mortar, concrete, or cement. An exemplary composition include calcium stearate and a flexural bond strength enhancing material comprising a polymer having a backbone to which are attached carboxyl cement anchoring groups. A cementious composition and method for enhancing water-repellency and flexural bond strength in a mortar are also disclosed.

Mortar admixtures and method of preparing same

An additive is provided that comprises a single blend of an acid component and calcium stearate for simultaneously controlling both primary and secondary efflorescence in concrete, and particularly in concrete masonry units such as pavers. A preferred method comprises the steps of partially saponifying tall oil fatty acid with calcium hydroxide, and thereafter adding calcium stearate dispersion to form a stable emulsion blend. In another embodiment, potassium hydroxide is mixed with calcium stearate dispersion, then subsequently introduced into tall oil fatty acid to provide a non-emulsion TOFA/CSD blend.

Masonry admixture and method of preparing same

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Arlington, MA, United States of America

Craig T Walloch