A process involves adding charged fibers with surface-cured temperature-sensitive gel during the preparation of concrete; preparing charged fibers with surface-cured temperature-sensitive gel by spraying, which envelops the charged fibers with a layer of temperature-sensitive gel; then solidifying the temperature-sensitive gel layer on the surface of the charged fibers by adjusting the environmental temperature. Utilizing the physical state of the temperature-sensitive gel at different temperatures, the temperature-sensitive gel wraps around the charged fibers to form an insulating layer. This prevents the scattering of the charged fibers due to charge repulsion during their introduction into the concrete preparation process, ensuring they are evenly distributed.

Methods, compositions, and systems for cementing are included. The method comprises providing an extended-life cement composition comprising calcium-aluminate cement, water, a cement set retarder, and a delayed-release cement set activator. The method further comprises introducing the extended-life cement composition into a subterranean formation and allowing the extended-life cement composition to set in the subterranean formation. The extended-life cement composition has a thickening time of about two hours or longer.

Methods, compositions, and systems for cementing are included. The method comprises providing an extended-life cement composition comprising calcium-aluminate cement, water, a cement set retarder, and a delayed-release cement set activator. The method further comprises introducing the extended-life cement composition into a subterranean formation and allowing the extended-life cement composition to set in the subterranean formation. The extended-life cement composition has a thickening time of about two hours or longer.

A method for forming a super-insulating material for a vacuum insulated structure for an appliance includes disposing hollow glass spheres within a rotating drum, wherein a plurality of interstitial spaces are defined between the hollow glass spheres. An anchor material is disposed within the rotating drum. The hollow glass spheres and the anchor material are rotated within the rotating drum, wherein the anchor material is mixed with the hollow glass spheres to partially occupy the interstitial spaces. A silica-based material is disposed within the rotating drum. The silica-based material is mixed with the anchor material and the hollow glass spheres to define a super-insulating material, wherein the silica-based material attaches to the anchor material and is entrapped within the interstitial spaces. The silica-based material and the anchor material occupy substantially all of an interstitial volume defined by the interstitial spaces.

Self-stressing engineered composites that include a matrix containing self-stressing reinforcement that is activated by an activator that causes, in situ, the self-stressing reinforcement to transfer at least some of its pre-stress into portions of the matrix adjacent the self-stressing reinforcement. In some embodiments, the activator can be of a self-activating, an internal activating, and/or an external activating type. In some embodiments, the self-stressing reinforcement includes an active component that holds and transfers pre-stress to a matrix and a releasing component that causes the active component to transfer its pre-stress to the matrix. In some embodiments, the self-stressing reinforcement is initially unstressed and becomes stressed upon activation. Various engineered composites, self-stressing reinforcement, and applications of self-stressing engineered composites are disclosed.

Self-stressing engineered composites that include a matrix containing self-stressing reinforcement that is activated by an activator that causes, in situ, the self-stressing reinforcement to transfer at least some of its pre-stress into portions of the matrix adjacent the self-stressing reinforcement. In some embodiments, the activator can be of a self-activating, an internal activating, and/or an external activating type. In some embodiments, the self-stressing reinforcement includes an active component that holds and transfers pre-stress to a matrix and a releasing component that causes the active component to transfer its pre-stress to the matrix. In some embodiments, the self-stressing reinforcement is initially unstressed and becomes stressed upon activation. Various engineered composites, self-stressing reinforcement, and applications of self-stressing engineered composites are disclosed.

Disclosed are a microcapsule for self-healing concrete and a preparation method thereof, and a self-healing concrete and a preparation method thereof. The microcapsule comprises a core and a wall, the components of the core comprising a healing agent, microcrystalline cellulose and Tween 80, and a material of the wall being a high-molecular organic material sensitive to stress of cracks. The preparation method for the self-healing concrete comprises steps of: weighing appropriate amounts of cement, sand, water and the above microcapsules, with each cubic meter of concrete containing 0.05 to 0.08 cubic meter of the microcapsules; stirring the cement, sand and microcapsules until uniformly dispersed to obtain a mixture; and pouring the water into the mixture, and stirring uniformly.

Disclosed are a microcapsule for self-healing concrete and a preparation method thereof, and a self-healing concrete and a preparation method thereof. The microcapsule comprises a core and a wall, the components of the core comprising a healing agent, microcrystalline cellulose and Tween 80, and a material of the wall being a high-molecular organic material sensitive to stress of cracks. The preparation method for the self-healing concrete comprises steps of: weighing appropriate amounts of cement, sand, water and the above microcapsules, with each cubic meter of concrete containing 0.05 to 0.08 cubic meter of the microcapsules; stirring the cement, sand and microcapsules until uniformly dispersed to obtain a mixture; and pouring the water into the mixture, and stirring uniformly.

A photocatalytic powdered water based paint is described comprising photocatalytic binding cement, inert micronized limestone, low viscosity cellulose, fluidifying agent, anti-foaming agent, vinyl polymer and pigments. The water based paint is characterized by the fact of comprising at least one and preferably all the following further additives: metakaolin, titanium dioxide, calcium formate and kieselguhr.

A photocatalytic powdered water based paint is described comprising photocatalytic binding cement, inert micronized limestone, low viscosity cellulose, fluidifying agent, anti-foaming agent, vinyl polymer and pigments. The water based paint is characterized by the fact of comprising at least one and preferably all the following further additives: metakaolin, titanium dioxide, calcium formate and kieselguhr.