The present invention relates to a reinforcement fiber (100) for strengthening a mortar. The reinforcement fiber (100) comprises: a cylindrical fiber body (10); and multiple linear grooves (20) formed on an outer surface of the fiber body (10), wherein the multiple linear grooves (20) comprise: multiple straight linear grooves (30) formed along the longitudinal direction on a surface of the fiber body (10); and an annular linear groove (40) surrounding the fiber body (10) while intersecting the multiple straight linear grooves (30), the straight linear grooves (30) are radially formed with reference to the center of the fiber body (10), and the straight linear grooves (30) and the annular linear groove (40) have a plurality of micro linear grooves (310) formed therein.

The present invention relates to a reinforcement fiber (100) for strengthening a mortar. The reinforcement fiber (100) comprises: a cylindrical fiber body (10); and multiple linear grooves (20) formed on an outer surface of the fiber body (10), wherein the multiple linear grooves (20) comprise: multiple straight linear grooves (30) formed along the longitudinal direction on a surface of the fiber body (10); and an annular linear groove (40) surrounding the fiber body (10) while intersecting the multiple straight linear grooves (30), the straight linear grooves (30) are radially formed with reference to the center of the fiber body (10), and the straight linear grooves (30) and the annular linear groove (40) have a plurality of micro linear grooves (310) formed therein.

A composition of matter may include a cement precursor, a phosphazene oligomer and water. A method may include blending a phosphazene oligomer and a cement precursor to form a cement precursor mixture. The method may then include introducing water into the cement precursor mixture to form the cement slurry. A composition of matter may include a cured cement matrix having a polyphosphazene polymer distributed throughout the cement matrix. A method may include cementing a wellbore by introducing a cement slurry into a wellbore, where the cement slurry includes a phosphazene oligomer. The method then includes maintaining the cement slurry such that a cured cement sheath forms, the cement sheath having a polyphosphazene polymer.

Light-weight, fire-resistant mineral foam includes an inorganic cementitious matrix and at least one metal hydrate that is a super hydrate substance, in which water is present with the substance in an amount of at least about ten moieties of water of hydration per formula unit of the substance. As a cured solid, that mineral foam, or another mineral foam composition including an inorganic cementitious matrix, can be provided as a structural member in part of an assembly that has at least one open web, thermally insulating support member at least partially embedded in the cured solid. Also, the cured mineral foam may be a solid foam in a form of a panel, panel block or tile, which may have a tongue provision and/or a groove provision.

A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and a polyester activator. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.

A lost circulation material (LCM) is provided having an alkaline nanosilica dispersion and a polyester activator. The alkaline nanosilica dispersion and the polyester activator may form a gelled solid after interaction over a contact period. Methods of lost circulation control using the LCM are also provided.

A process for making a layered multi-material structural element having controlled mechanical failure characteristics. The process includes the steps of: supplying a cementitious layer and forming a polymer layer on the cementitious layer by additive manufacture such that the polymer layer has a first thickness and the cementitious layer has a second thickness, wherein the polymer layer comprises a polymer and the cementitious layer comprises a cementitious material; and allowing the polymer from the polymer layer to suffuse into the cementitious layer for a period of time to obtain a suffused zone in the cementitious layer such that the suffused zone has a third thickness that is less than half the second thickness.

A process for making a layered multi-material structural element having controlled mechanical failure characteristics. The process includes the steps of: supplying a cementitious layer and forming a polymer layer on the cementitious layer by additive manufacture such that the polymer layer has a first thickness and the cementitious layer has a second thickness, wherein the polymer layer comprises a polymer and the cementitious layer comprises a cementitious material; and allowing the polymer from the polymer layer to suffuse into the cementitious layer for a period of time to obtain a suffused zone in the cementitious layer such that the suffused zone has a third thickness that is less than half the second thickness.

Composite material, where the matrix material and the additive are held together by covalently or non-covalently bound ligands. The linker unit between matrix and additive has the structure Ligand1-LinkerL-Ligand 2, wherein Ligand1 and Ligand2 are a bond or a chemical entity that is capable of binding covalently or non-covalently to a structural entity, such as a polymer matrix or the additive (ex. CNT, graphene, carbon nanofiber, etc), and LinkerL is a chemical bond or entity that links Ligand1 and Ligand2.

A panel has a gypsum matrix, in which the following additives are embedded: glass fibre in an amount greater than 1 wt % relative to the gypsum and a synthetic polymeric binder in an amount greater than 2.5 wt % relative to the gypsum. The glass fibre and synthetic polymeric binder are present in a weight ratio of at least 2 parts binder to one part fibre. The amount of sand present in the gypsum matrix lies in the range 0-0.5 wt % relative to the gypsum. The amount of cellulosic fibre present in the gypsum matrix lies in the range 0-2 wt % relative to the gypsum.