Northwestern University

Surendra P Shah

Zoi S Metaxa

Maria S Konsta-Gdoutos

Shashi Marikunte

Yixin Shao

Mark C Hersam

Jung-Woo T Seo

Maria Konsta

A composite cement material is prepared from cement material and carbon nanotubes, wherein the carbon nanotubes are present from about 0.02 wt % to about 0.10 wt % based on weight of cement material. The process for preparing such cement compositions includes sonicating a mixture of a surfactant, water, and carbon nanotubes; and blending the dispersion and the cement material to form a cementitious paste. The process may also include curing the cementitious paste. The composite cement materials are useful in a variety of cement applications where a reduction in nanoscale flaws and fractures is desired.

Highly dispersed carbon nanotube-reinforced cement-based materials

Highly-dispersed carbon nanotube-reinforced cement-based materials

Highly concentrated carbon nanotube or other nano-reinforcement suspensions and/or masses are prepared for use as admixtures in cement base materials to make cementitious composite materials.

Highly concentrated nano-reinforcement suspensions for cementitious materials and method of reinforcing such materials

An extruded fiber reinforced cement matrix composite having substantially improved tensile strength with strain hardening behavior and substantially improved tensile strain, and improved flexural properties in three-point bending is made by mixing cement, water, water soluble binder, and relatively short, discontinuous reinforcing fibers, preferably short polyvinyl alcohol fibers, to provide an extrudable mixture, the extruding the mixture to shape, and curing the cement.

Extruded fiber reinforced cement matrix composites and method of making same

An extruded fiber reinforced cement matrix composite having substantially improved tensile strength with strain hardening behavior and substantially improved tensile strain, and improved flexural properties in three-point bending. The composite is made by mixing cement, water, water soluble binder, and relatively short, discontinuous reinforcing fibers, preferably short poly vinyl alcohol fibers, to provide an extrudable mixture; then extruding the mixture to shape, and curing the cement.

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Evanston, IL, United States of America

Surendra P Shah