A method for recycling a used rotor blade of a wind turbine includes processing the used rotor blade into a plurality of material fragments. The method also includes treating the plurality of material fragments to remove at least a portion of the at least one composite material and expose the at least one fiber material of the used rotor blade. Further, the method includes mixing the treated plurality of material fragments with, at least, an alkali activator to form a usable geopolymer concrete.

A structural barrier and energy absorbing device comprises a plurality of structural elements. The structural element alone or in a plurality may serve as a traversal impediment or energy absorbing device, such as a pedestrian barrier, vehicular barrier, anti-tank obstacle, ballistic barrier, or the like. The structural element may be a tetrapod such that it comprises an element body having four extension portions that extend outwardly from the interior center to a distal end, such that the structural element maintains an identical orientation and a low center of gravity in each of four resting positions. The structural element may be a solid-state structural element comprised of a particular material or a portable and collapsible structural element wherein the element body comprises an outer skin defining an interior void space, such that during set-up or installation the interior void space may be filled with a filler substance onsite.

A concrete product set by pouring a concrete slurry includes a) a concrete mixture; b) a graphene admixture; c) a colloidal silica admixture; and d) at least one reinforcing fiber selected from the group of fibers. As the poured concrete slurry cures, the poured slurry hardens into a composite material product, and the composite material defines capillary structures that at least in part fill with silica and lime, and the surrounding composite material is embedded with graphene. In another exemplary embodiment, the present invention is directed to a process for preparing a concrete product. The process comprises the steps of a) preparing a concrete slurry; b) pouring the concrete slurry; and c) allowing the concrete slurry to cure. In another exemplary embodiment, the present invention is directed to the product itself; namely, a concrete product with or without fibers, or to the admixture(s).

A concrete product set by pouring a concrete slurry includes a) a concrete mixture; b) a graphene admixture; c) a colloidal silica admixture; and d) at least one reinforcing fiber selected from the group of fibers. As the poured concrete slurry cures, the poured slurry hardens into a composite material product, and the composite material defines capillary structures that at least in part fill with silica and lime, and the surrounding composite material is embedded with graphene. In another exemplary embodiment, the present invention is directed to a process for preparing a concrete product. The process comprises the steps of a) preparing a concrete slurry; b) pouring the concrete slurry; and c) allowing the concrete slurry to cure. In another exemplary embodiment, the present invention is directed to the product itself; namely, a concrete product with or without fibers, or to the admixture(s).

A process for providing a fiber cement product is provided the process comprising the steps of: —providing an uncured fiber cement product; —curing said uncured fiber cement product; —drying said cured fiber cement product to obtain a humidity of said cured fiber cement product being less than or equal to about 8% w; —abrasive blasting at least part of the surface of said dried fiber cement product.

A process for providing a fiber cement product is provided the process comprising the steps of: —providing an uncured fiber cement product; —curing said uncured fiber cement product; —drying said cured fiber cement product to obtain a humidity of said cured fiber cement product being less than or equal to about 8% w; —abrasive blasting at least part of the surface of said dried fiber cement product.

A process for providing a fiber cement product is provided the process comprising the steps of: —providing an uncured fiber cement product; —curing said uncured fiber cement product; —drying said cured fiber cement product to obtain a humidity of said cured fiber cement product being less than or equal to about 8% w; —abrasive blasting at least part of the surface of said dried fiber cement product.

The present invention relates to pale-colored fiber cement products at least comprising white cement and synthetic fibers, wherein the synthetic fibers are pigmented with at least one dark pigment chosen from the group consisting of a black pigment, a brown pigment, a blue pigment, a red pigment, a green pigment and a gray pigment. The present invention further relates to methods for the production of these pale-colored fiber cement products as well as to uses thereof in the building industry.

A downhole tool for controlling the flow of a fluid in a wellbore includes a component that comprises: a cementitious material; an aggregate; and a ductility modifying agent comprising one or more of the following: an ionomer; a functionalized filler; the functionalized filler comprising one or more of the following: functionalized carbon; functionalized clay; functionalized silica; functionalized alumina; functionalized zirconia; functionalized titanium dioxide; functionalized silsesquioxane; functionalized halloysite; or functionalized boron nitride; a metallic fiber; or a polymeric fiber.

A downhole tool for controlling the flow of a fluid in a wellbore includes a component that comprises: a cementitious material; an aggregate; and a ductility modifying agent comprising one or more of the following: an ionomer; a functionalized filler; the functionalized filler comprising one or more of the following: functionalized carbon; functionalized clay; functionalized silica; functionalized alumina; functionalized zirconia; functionalized titanium dioxide; functionalized silsesquioxane; functionalized halloysite; or functionalized boron nitride; a metallic fiber; or a polymeric fiber.