Abstract: A temporary roll-up floor cover includes a rugged upper layer that is impervious to water and pervious water vapor, and a lower antimicrobial wicking layer that quickly spreads water while transmitting water vapor, to facilitate evaporation of moisture that gets under the cover. The cover may also include one or more of a central layer containing a microporous membrane, a coating or film layer which may be perforated, and a stiffener lattice that resists folding, gathering and puckering without preventing the cover from rolling up. The coating layer adds additional resistance to folding, gathering and puckering without preventing the cover from rolling up. The coating may be perforated to increase water vapor transmission through the cover. One or more antimicrobial agents may be incorporated into the floor cover, for example, into the wicking layer during extrusion of the airlaid mat forming the wicking layer.

Abstract: A dual-purpose concrete cover that includes a construction cover layer, a vapor retardant layer, and a wicking layer. An anti-snag scrim layer may be included under the wicking layer. One or more antimicrobial agents may be included in the wicking layer or other locations within the cover to prevent mold, mildew, bacterial and viral growth. While conventional concrete curing blankets often include a vapor barrier selected to keep the concrete surface wet well past the concrete curing period, the vapor retardant layer is designed to allow the dual-use cover to dry out at about the end of the concrete curing period so that the dual-use cover can remain in place as a construction cover after the curing period. The dual-purpose concrete cover is designed to fully dry prior to removal, which allows it to be reused, whereas conventional concrete curing blankets are typically discarded after a single use.

Abstract: A concrete dowel device including a sleeve and plate in which the sleeve includes break-away alignment tabs at the opening of the sleeve to ensure proper alignment of the plate within the sleeve during field installation. The tabs are positioned at the sleeve opening, rather than along the length of the socket, to avoid misalignment of the plate in the sleeve, simplify use and reduce manufacturing costs of the product. The sleeve and plate may include additional alignment surfaces on the plate, at the rear corners, or along the rear side of the plate and sleeve. To facilitate manufacturing, the break-away alignment tabs may be formed as molded components rotated and snapped into position. Alternatively, the break-away alignment tabs may be formed as part of an insert plate manufactured apart from and attached to the flange of the sleeve.

Abstract: Disclosed is a concrete curing blanket that includes an absorbent layer and an impervious layer on the absorbent layer, wherein the impervious layer includes a first mixture of unprocessed raw starch, a polymeric vinyl alcohol and a nucleating agent, and a second mixture of glycerol and water.