Adjusting the side plates can help contain concrete and prevent costly blowouts in low-grade areas. Hydraulic side plates are helpful when the grade on your job causes concrete loss. In Power Curbers’ terminology, the form that attaches to the machine is referred to as the mold mules are hand tools. Some people interchange the terms mule and mold. This design requires disassembly and cleaning after each use of the mold. Other mold options may not be compatible with a side-entry knife. Each mold must be individually analyzed to determine its compatibility. The slope of the gutter may be such that the side-entry style cannot be used. The transitions from curb to driveway still require forming and finishing by hand. The side entry design provides a better, but not perfect, finish at driveway entrances. This is a sliding plate that enters the curb portion of the mold from the side and is formed to create a slight choke. It is common to position the knife so it leaves material for the finishers to complete the entrance.Ī side entry style of driveway knife can also be used. It will not finish the surface but eliminates the need to remove the material by hand. Our standard knife utilizes a rotating plate through a slot in the mold shell to block the flow of concrete.
When engaged, it prevents material from filling the curb portion of the mold.
Driveway KnifeĪ driveway knife is used to reduce labor and wasted material at driveway entrances. Detachable toes are not designed to be installed in a different location as a replacement for a block-out, except on sidewalk molds. Taller toes, when in place, may deflect due to the pressure of the vibrated concrete against them. Vent slots are used to compensate for the absence of the screed. Molds with a detachable toe are built without our normal adjustable screed. Doing so may allow material to build up under the shell and cause it to lift. Also, the mold shell should not be allowed to overlap the existing pavement. Excessive material waste and/or improper filling of the mold can occur. When the toe is bolted in place, the same mold can pour stand-alone curb and gutter.ĭifficulty with radii is one of the limitations of working adjacent to existing pavement. Detachable ToeĪ detachable toe can be removed in order to place the gutter adjacent to existing pavement. If a mold is to be built to accept bolt-on extensions included with another mold, the drawing must reflect as such. As the height of the extension increases, they are more likely to deflect due to the pressure of the vibrated concrete against them.Įxtensions are generally exchangeable between molds designed to accept them. In some cases, extensions may be stacked to result in a different height (and reduce the overall number of extensions needed). They do not change the height of the curb face.Ī mold may have multiple extensions for pouring different heights. They attach to the bottom of the mold so the increased height is in the base. Bolt-on Extensionīolt-on extensions increase the pouring height of a mold and are typically used in pairs. Safety should be observed as block-outs may have sharp edges where the block-out shell intersects the mold shell. Site preparation must be done to accommodate the fill width of the mold. While the pouring width is reduced with a block-out, the overall width of the mold remains the same. It is generally bolted into the gutter section of the mold, but can be used to remove a feature such as a step on the back of the curb that supports a sidewalk. BlockoutĪ blockout is used to change the pouring width of a mold. It gives you an extra 24” (610 mm) of lift in addition to the 36” (914 mm) of post extension to allow you to clear tall steel cages. The hydraulic barrier lift allows you to raise the mold up and off of a steel cage at the end of a day’s pour or to move the machine to a different part of the jobsite.
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