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Milling Machine Used in County Road Reclamation

Multifunctional capabilities of Roadtec RX-900 cold planer allows Texas contractor to take on rural county road reclamation project and generate additional return on investment

Roadtec RX-900

RX-900 cold planer pulverizes a 1.5-inch layer of chip seal and works it into the flex base.

Lindsey Contractors used their RX-900 cold planer to pulverize a 1.5-inch layer of chip seal and work it into the flex base all in one operation. Two simple changes from the regular milling mode were made: the front-loading conveyors were turned off and the rear cutter housing door was opened to leave the processed road material on the ground.

During the project, the RX-900 traveled in the forward direction exactly as if they were cold milling with the conveyors turned off. Cutter teeth looked nearly new when the job was completed.

The gradation of milled material will be different, depending on whether the drum is up-cutting or down-cutting. The up-cut material (left) graded evenly from dust on top to two inches on the bottom. The down-cut method placed the larger material on top. The contractor for this project preferred the fine up-cut material.

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The reverse-gearbox RX-900 up-cuts and rear-loads while pushing a cement slurry tanker and pulling a screening/crushing/mixing train plus an asphalt tanker. A recirculating JCI single deck screen (3/4-inch passing) and impact crusher sizes the material, which is then weighed and mixed with asphalt emulsion. Then the train lays down a windrow for a Carlson pick-up machine to feed the paver.

In the case of Lindsey's RX-900 cold planer, modifications were not even required to use the machine as a pulverizer. At top cutting speeds of 125 fpm, it took an average of approximately one hour per pass to cut the 1.5 miles. No water was used. Cutter teeth looked nearly new when the job was completed. In Leber's words, "the contractor was very pleased."

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