Abstract:
Asphalt or concrete pavement is removed from a road bed by an elongated cutter blade that extends in a downward and forward direction along a cutting plane to a cutting edge. The cutting plane forms an acute angle of between 45.degree. and 55.degree. with the surface of the pavement. The cutter blade is intermittently driven with a force parallel to the cutting plane in the forward direction while the cutting edge penetrates the pavement to drive the cutter blade incrementally in a forward direction and plane off the pavement in a chisel-like manner. A source of vibrations is connected to one end of plural spaced apart resonant beams. At the other end, the beams drive the cutter blade.
Abstract:
Methods, compositions and systems for prolonging the lives of transportation surfaces, including pavement, runways, bridges and parking structures include chemically protecting the transportation surfaces. Chemical protection may be accompanied by physical alteration of the transportation surface, which may enhance one or both of a microtexture and a macrotexture of the transportation surface.
Abstract:
An apparatus for removing markers from pavement includes a prime mover and an implement adjustably coupled to the prime mover. The implement includes a body, a tool having a working tip, a leveling pointer pivotably coupled to the body such that the leveling pointer moves relative to the body under the force of gravity, and a target indicium disposed near the leveling pointer. In some embodiments, the apparatus may further include a camera focused on the working tip of the tool and a display visible to an operator of the prime mover. A method of removing a marker from pavement includes positioning the working tip of a tool at a predetermined distance from an edge of the marker embedded in the pavement; adjusting the implement to a predetermined angle relative to an upper surface of the pavement by rotating the implement until the leveling pointer is aligned with the target indicium; and advancing the implement to remove the marker from the pavement.
Abstract:
An apparatus for supporting conventional hand-held pneumatic breakers in such a way as to break a concrete slab down to the desired precise depth. The slab can be a building floor, bridge deck, or other slab required to be broken to a predetermined depth. The apparatus comprises a mounting frame adapted to replace the bucket of a mini-loader such that the mounting frame can be positioned at an adjusted level and orientation by the hydraulically operated arms and rams of the mini-loader. The mounting frame has an upper flange from which depend U-shaped guiding brackets between which are guided the transverse handlebar of each breaker. A guide for each drill bit of the breakers is fixed to the mounting frame. The breakers are free to move between a top and a lower limit position relative to the mounting frame. In the lower position the handle bars are supported by the bight of the U-shaped brackets. During the concrete slab breaking work, the drill bit abuts on the slab solely under the bias of the hammer weight; this results in precise drilling.
Abstract:
Apparatus for breaking concrete and asphalt pavement and the like comprising a frame adapted to be supported by and above pavement to be broken. Power operated means move the frame in one and opposite directions relative to and in parallel relationship with the pavement. A plurality of air hammers are supported in a gang parallel arrangement by the frame with their cutting tools aligned in a closely spaced parallel series. Cutting ends of the tools are adjacent the pavement with the series of tools extending in one direction and frame movement occurs in a direction substantially at right angles relative thereto. Thus, the frame movement defines a predetermined generally rectangular path of movement and pavement breaking operation of the cutting tools. A cradle on the frame is moveable relative to the frame for adjusting both the height and the angle of attack of the cutting tools relative to the pavement. The angle of attack is adjustable so as to be displaced substantially from the plane of the pavement and from a plane perpendicular thereto, the tools thus being adapted to hardness and other pavement characteristics. In one form the frame is mounted on a fixed frame and is moveable therealong by a power operated means. In a second form the frame is mounted on a self-propelled vehicle for movement with the vehicle parallel to the pavement.