A method and apparatus are provided to rehabilitate and beautify cracked concrete surfaces by adding channels to the surface.

A vertical joint system for substrates is formed with joints and which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees while maintaining engagement of the joints. The joints and are further configured to form two locking planes one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces. At least one surface in each pair of engaging surfaces is smoothly curved. The joints and can be further arranged to provide a third locking plane parallel to and between the locking planes. The joints are disengaged by combination of a downward rotation of one joint relative the other then application of a downward force.

A vertical joint system for substrates is formed with joints and which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees while maintaining engagement of the joints. The joints and are further configured to form two locking planes one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces. At least one surface in each pair of engaging surfaces is smoothly curved. The joints and can be further arranged to provide a third locking plane parallel to and between the locking planes. The joints are disengaged by combination of a downward rotation of one joint relative the other then application of a downward force.

A micro injection assembly for the repair of floors that includes an adapter body operably configured to couple with a tube having adhesive and defining an internal channel, a hub selectively removably coupled to the adapter body and having a rigid needle member coupled thereto and recessed within the hub, wherein the rigid needle member projects outwardly from the second end of the hub in a linear orientation, has a blunt distal end, and defines a needle channel spanning the length of the needle member. The assembly also includes a cap selectively removably couplable to the adapter body in a watertight configuration and with the cap disposable in an overlapping configuration with the adapter body. The assembly is operable to effectuate emission of an adhesive material from a tube through the adapter body, hub, and needle member to spaces between a flooring material and subfloor.

Provided is a road structure reconstructed from large-scale independent underground garage and a construction method, which solves the problem of a newly constructed urban expressway passing through large underground space. The technical point is a construction method for the road structure reconstructed from large-scale independent underground garage, including the following steps: S100: segmentation for the garage, S200: preparation before construction: the materials and equipment required for construction are transported to the site, and the construction site is cleaned, S300: reconstruction for the front section, S400: reconstruction for the middle section, S500: reconstruction for the rear section. The inventiveness of the present disclosure is the application of segmentation construction, the front section is completely obsoleted, a transition section is provided at the middle, and the design of the rear section adopts a double-deck road, thus the original underground garage structure is fully utilized.

Deck repair blocks, deck repair methods, and repaired decks are enabled. For example, a deck repair block can comprise: a saddle portion configured to receive a joist, a first recessed portion configured to receive a first deck board, and a second recessed portion configured to receive a second deck board.

A structural connector having a tensioning bolt constructed and arranged for receiving two tension rods, each tension rod being axially adjustable within the tensioning bolt. Each tension rods has ends, with one end being rounded and the other end having an external hex drive profile. The two rods are arranged so the rounded ends are opposite each other. The structural connector is used to provide tension between two adjacent joists and the rounded end of each tension rod is received by a round hole of a pair of mounting brackets attached to the adjacent joists. Each tension rod is locked into a set tensioned position by a threaded nut.

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.

A method and arrangement for drying a water damaged sandwiched floor structure including a top concrete layer, an air permeable isolating layer and a concrete subfloor, comprising providing an air inlet opening and an air outlet opening through the concrete layer, and continuously in a closed loop flowing air through the isolating layer via the openings by a blower and a dehumidifier in serial connection. According to the invention the blower is a suction blower, whereby air is drawn from the outlet opening by the suction blower, and dry air is forced into the inlet opening by the dehumidifier.

A vertical joint system for substrates is formed with joints and which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees while maintaining engagement of the joints. The joints and are further configured to form two locking planes one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces. At least one surface in each pair of engaging surfaces is smoothly curved. The joints and can be further arranged to provide a third locking plane parallel to and between the locking planes. The joints are disengaged by combination of a downward rotation of one joint relative the other then application of a downward force.