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Finishing Kimberly Johnston, Associate Editor Rolling Right Along Roller screeds offer contractors options for screeding and the ability to strike off unique applications. W hen it comes to screeding concrete, contractors have a variety of options to choose from. One of those options is a power roller screed, also called a friction screed. A roller screed is powered by either an electric, hydraulic or gas motor and spins in the opposite direction it is being pulled. The spinning motion levels the concrete while pulling it forward. The motion of the screed loads the concrete in front of the screed and then pushes it down into the rest of the concrete providing compaction, says Spin Screed Inc.’s President Joe Churchill. Roller screeds are made of a power When working on inclines, roller screeds are the way to go, manufacturers say. head (end with the motor), tubular roll- They are lightweight and easily pulled on slopes. ers and a tailpiece, says Bud Martin, ﬁeld sales manager with TerraQuip at the surface, a roller screed doesn’t ends and inside of the pipe also need Construction Products, Inc., which ” do that, Churchill says. “One of the lubrication from time to time, he adds. manufactures the Terramite roller big advantages of a roller screed is you screeds. These screeds can be oper- can pour concrete wetter and still get a Unique applications ated by a two-man crew pulling the ” durable surface, he adds. Roller screeds are designed to be used handles on each end of the screed. And roller screeds do not vibrate, with ﬂat concrete slabs, but they can The various lengths of pipe allow which keeps the aggregate near the sur- also be used in some unique applica- contractors to accommodate different face resulting in a harder surface, says tions. Because roller screeds are light- job sizes. With some roller screeds, Joe Lindley of Jlin Corp./Multivibe. “It weight and pulled by the crew, they are pipes can be combined to create a does have to rest on forms. The forms a great option for inclined pours. “You longer screed. It is important to note are your grade. All a person has to do is can’t strike off a pour going downhill that screed lengths should not be too just pull the roller screed until the tube or uphill with anything that vibrates large, though. Make sure to check ” is riding on the forms, Lindley adds. because it’s always going to shake the with the manufacturer on limitations or The roller screed is a lightweight unit ” mud to the bottom, Lura says. requirements. and very portable. It can be lifted by One of the most popular uses for the crew and transported in a truck, roller screeds is with pervious con- What’s the difference? without the need for a job trailer, crete placement. Pervious concrete is “The roller screed differs from other adds Dennis Lura, president of Lura a drier mix with zero slump. But even screeds in that it will strike off, level and Enterprises. more important is that pervious con- ”
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