A bituminous mastic includes:—from 0.5% to 25% by mass of at least one hydrocarbon oil, the total content of paraffinic compounds of which, measured according to the ASTM d2140 method, is greater than or equal to 50% by mass, and preferably greater than or equal to 60% by mass, relative to the total mass of the oil,—from 15% to 60% by mass of bitumen,—from 20% to 60% by mass of fillers, and—at most 14%, by mass of at least one polymer, preferably chosen from elastomers, relative to the total mass of bituminous mastic. A method for preparing such a bituminous mastic and to the uses thereof, in particular in certain road and/or industrial applications.

A drywall repair apparatus and method. The apparatus includes a plastic puck that is dimensioned to fill a hole in damaged drywall. The apparatus is anchored inside the wall. The apparatus may have an integrated plastic puck mounted on a plastic plank. The device mounts inside the wall and the puck fills the ½″ deep void, leaving only 1/16″ to be filled with joint compound. There is no time-consuming multiple layering required. There is no need for broad feathering to hide the repair and the repair is as solid as the original wall before damage.

A device for repairing a hole in a wall structure, the device comprising: a body; a plurality of arm members mounted relative to the body, wherein a webbing member extends between two or more of the arm members; and a displaceable member associated with the body, wherein displacement of the displaceable member actuates the plurality of arm members to move relative to the body between a retracted condition and an extended condition in which the webbing member is stretched relatively tightly between the arm members to form a substantially planar surface.

A floor patching composition, including: 100 parts of a dry mortar composition including: 9 to 15 parts of quick-setting cement, and 85 to 94 parts of a sole fine aggregate or a combination of two or more fine aggregates, wherein the sole fine aggregate or the combination has an average true density of 2.8 to 4.0 g/cm.sup.3 and a maximum particle size of 1.2 mm or less; 3 to 18 parts of polymer emulsion solid content having a glass transition temperature (Tg) of equal to or higher than −20° C. and equal to or less than 10° C.; and 6 to 18 parts of water.

Aspects of the disclosure are directed to apparatuses and/or methods involving stacked layers of material. As may be implemented in accordance with one or more aspects characterized herein, an apparatus includes a base layer of material with upper and lower surfaces, and stacked layers of material on the base layer. The stacked layers include a first layer stacked on the upper surface of the base layer, and further layers stacked on and adhered to one of the other stacked layers. At least one of the stacked layers has a lower surface area that is larger than a lower surface area of one of the stacked layers on which it is stacked, with an adhesive on an exposed portion thereof.

Aspects of the disclosure are directed to apparatuses and/or methods involving a wall patch. As may be implemented in accordance with one or more aspects characterized herein, a wall patch has a plurality of layers including a base layer having an upper surface and a lower surface, and stacked layers stacked over the upper surface of the base layer. Each stacked layer is stacked on one of the other layers and has an exposed lower surface region that extends laterally beyond the layer upon which it is stacked. Adhesive may operate to adhere the exposed lower surface regions and the lower surface of the base layer may be adhered to a wall surface. The stacked layers, base layer and adhesive to provide a gradient defined by the thicknesses of the layers and adhesive, and defined by the area of the exposed lower surface regions of the stacked layers.

A construction process for enhancing or repairing a concrete floor structure that includes a carbon fiber grid as a reinforcement component is disclosed. The process includes forming a trench at a top surface of the concrete floor structure and placing a reinforcement material in the formed trench. Then, a concrete bonding agent is applied into the trench. Then, the trench is filled with concrete. As a result, the concrete floor structure is enhanced or repaired to have at least one additional reinforcement component other than the carbon fiber grid.

Provided are a concrete structure repaired and reinforced using a textile grid reinforcement and a highly durable inorganic binder and a method of repairing and reinforcing the same, capable of easily repairing and reinforcing an old concrete structure by adhering a textile grid reinforcement, which is coated with a coating material to improve adhesiveness, to the old concrete structure and by adhering a textile grid reinforcement selectively using a highly durable inorganic binder having chloride penetration resistance performance or chemical resistance performance according to a use environment and a reinforcement purpose, that is, by adhering a textile grid reinforcement using an inorganic binder such as cement in place of an organic adhesive. Further, the concrete structure has excellent refractory performance because both the textile grid reinforcement such as a carbon fiber and the highly durable inorganic binder are incombustible materials, and can be effectively applied to reinforcing facilities exposed to the danger of fire.

A system and method for repairing and/or strengthening a structure. The system may include an epoxy paste filler, a primer, an saturant/bonding adhesive, and a unidirectional carbon fiber. The method may include application of a paste filler, a primer, a bonding saturant and a unidirectional carbon fiber. The carbon fiber may be applied between application of a first bonding saturant layer and a second bonding saturant layer. The amount and/or length of the unidirectional carbon fiber may be based on the type of damage (e.g., the type and/or location of a crack) to the structure.

A plasterboard wall or ceiling repair assembly for repairing a hole in a plasterboard wall or ceiling panel, the assembly comprising: a sheet adapted to be deformed and passed through the hole of the plasterboard wall to be positioned for engagement with an inner or non-exposed surface of the plasterboard wall surrounding said hole; and an inflatable balloon coupled with the sheet for retaining the sheet in engagement with the inner non-exposed surface of the plasterboard wall.