A stair step jig assembly for smoothing treads on concrete steps includes a jig that is elongated to a predetermined length to extend along a full length of a tread on a concrete step for smoothing the tread before the concrete has cured. A riser adjustment is hingedly coupled to the jig and the riser adjustment unit abuts a concrete form that is positioned against the riser of the step adjacent to the tread upon which the jig is positioned. A leg is hingedly coupled to the jig and the leg slidably engages the riser adjustment such that each of the leg, the riser adjustment and the jig forms a triangle. The leg has engages a top of the riser of the step adjacent to tread upon which the jig is positioned for keeping the jig at a fixed angle on the tread.

The invention provides a float trowel blade attachment for cement floor finishers comprising a rectangular section of sheet metal having a top surface and a bottom surface and having its edges optionally bent upwardly, means for providing to the top surface a three-sided rearwardly open pocket on the back of the section adjacent the leading edge thereof adapted to partially receive a finish trowel blade of the finisher, a spring clip secured to the top surface or the pocket-forming means and extending rearwardly therefrom so as to be engageable with the finish trowel blade to retain the section thereon, and wherein said rectangular sheet metal has attached to its bottom surface using an adhesive or mechanical attachment material interlayer, a composite rigid abrasive element bonded to a resilient backing and wherein said abrasive element comprises a substrate of two or more non woven layers pads including holes for inserting grinding and polishing elements.

An improved mini-trowel attachment assembly having a rotary stabilizer with a plurality of screw holes disposed therein with a plurality of replacement blades secured therein by a plurality of screw members. The plurality of replacement blades include at least a pair of elongated adjustable slots that allows the replacement blades to be adjusted inward of the outer peripheral edge of the rotary stabilizer. A free-wheeling self-lubricating bearing assembly having a first non-rotary bearing and spacer ring member attached to the rotary stabilizer and a second free-wheeling member attached to the first non-rotary bearing and spacer ring member that freely rotates when it engages wall structures and upstanding obstructions in concrete surfaces. Also, the elongated slots allows the replacement blades to be adjusted inward of the outer peripheral edge of the free-wheeling self-lubricating bearing assembly.

A vibratory handle for use with a surface finishing float, the vibratory handle including a first end having a bore for receiving a first float attachment screw therein for attaching the first end to the finishing float. The vibratory handle further including a second end having an oblong slot for receiving a second float attachment screw therein for attaching the second end to the finishing float such that the first float attachment screw and second float attachment screw are in operative alignment and spaced apart a distance along a surface the float. The vibratory handle also includes a gripping portion extending between the first end and second end.

A concrete finishing system may include a surface sensor, a depiction generator for generating a depiction of a profile of the concrete surface, and a display for displaying the depiction. The system may be used to perform a method of finishing concrete including arranging a surface sensor such that a work area for placement of the concrete is within a field of view of the surface sensor, capturing surface profile data of a surface of the concrete during placement or finishing of the concrete, generating a surface profile depiction based on the surface profile data, displaying the surface profile depiction, and informing personnel regarding a variation in height based on the depiction. The concrete slab formed with this process may include a floor flatness value above 35 and a surface free of ground areas and free of filled areas.

An adjustable screed board includes an outer member elongated along a longitudinal axis of the adjustable screed board. The outer member includes a leveling surface. The adjustable screed board also includes an inner member elongated along the longitudinal axis and coupled to the outer member for sliding movement, relative to the outer member, along the longitudinal axis. The inner member includes a leveling surface configured to remain flush with the leveling surface of the outer member during relative sliding movement of the inner and outer members. The leveling surfaces of the inner and outer members are oriented to cooperatively define a bottommost edge of the adjustable screed board along a working length.

A mounting adapter including a bearing for rotatably mounting a surface processing tool to a tool holder body. The bearing has a rotatable hub including an attachment in an upper portion thereof for non-rotatable attachment to the tool holder body. The mounting adapter includes a rubber flex pad having a periphery and a first aperture. The mounting adapter includes an element supporting the periphery of the rubber flex pad, the element having a second aperture in vertical registry with and beneath the first aperture. The mounting adapter includes an end plug within the second aperture for closing the first aperture. The end plug supports the flex pad from beneath the second aperture.

A reinforcement assembly removably connectable to a pan of a troweling machine having a rotor assembly with corresponding troweling arms each supporting a trowel blade is provided. The reinforcement assembly comprises a reinforcement member; a first connector connectable to the reinforcement member, the first connector being removably connectable to one of the troweling arms; and a second connector connectable to the reinforcement member, the second connector being removably connectable to the pan. In operation, the reinforcement assembly maximizes a distribution of weight of the troweling machine onto a surface of the pan.

Concrete texturing devices for use on an uncured concrete slab. The concrete texturing devices have a device body, one or more drive systems, at least one articulating arm, and at least one texturing structure. Also disclosed are methods of use.