Cold Milling Machines for Construction Sites
Wirtgen will be showing its half-meter cold milling machine with rear loading, the W 50 Ri. This machine features a simple operating concept and a range of automated functions. Another highlight at the show is the front loader W 120 Fi for working widths of up to 4-ft., 3-in (1.3 m). The John Deere engine of this F-Series compact milling machine has been adapted to meet the requirements of cold milling applications. The company’s portfolio of cold milling machines also includes two F-Series large milling machines. The W 210 Fi is a solution for several applications, ranging from surface layer rehabilitation and pavement removal to fine milling work. In the development of the W 250 Fi, the focus fell on milling performance and material loading capacity.
F-Series cold milling machines are available with the Mill Assist machine control system and Wirtgen Performance Tracker (WPT), which enables digital documentation of the work performed on the construction site.
Cold Recycling and Soil Stabilization
The responsible handling of valuable resources was a consideration in the development of the W 380 CRi, WR 200 XLi and WR 250i. As a rear loader with a mixing capacity of up to 800 t/h, the W 380 CRi is designed for rehabilitation of wide roadways and can be used for both cold in-place recycling (CIR) and full-depth reclamation (FDR) projects. The WR-series recyclers with all-wheel drive are used for both cold recycling and soil stabilization operations. With a working width of 7-ft., 10-in. (2.4 m), they can also be used for challenging projects. The machines come with digital system solutions – the AutoTrac steering system and the WPT (Wirtgen Performance Tracker) documentation system.
Wirtgen will be showing two adaptable machines for concrete paving, the SP 15i and the SP 94i. The SP 15i enables positioning of the slipform paving mold, which supports monolithic profiles in the offset process. The machine also features an extendable operator’s platform that provides an overview of the working area and paving results. The machine can also be remotely controlled with the AutoPilot 2.0 control system. The SP 94i is a fully modular inset slipform paver in the 30-ft. class (10 m). The four-track paver with the TeleMold system, which enables variation of the paving width by up to 3-ft. on each side (total of 6-ft.) will be exhibited at the show in Las Vegas.
Cold Milling Technologies
The Mill Assist machine control system supports cold milling applications. In automatic mode, the system aims for balance between performance and operating costs. The power management system automatically adjusts the engine speed and the milling drum speed to deliver the actual power required for each situation. The lower speed range enables a reduction of fuel consumption and pick wear. The upper speed range enables the achievement of an optimal milling pattern, even in the case of high area performance rates. The operator can also preselect one of three working strategies: ECO, performance-optimized or milling pattern quality.
Wirtgen Performance Tracker (WPT) enables documentation of the milling performance. WPT uses a laser scanner to determine the cross-sectional profile to be milled. The surface milling performance and milling volume are then determined using GPS positioning and other sensors. Important information is displayed on the machine’s control panel. An automatically generated report can be sent to the machine’s owner by e-mail.
Technologies for Recycling and Soil Stabilization
The satellite-based AutoTrac steering system for Wirtgen WR-series recyclers enable completion of project tasks. It steers the machine with a precision measured in centimeters on the basis of a previously determined reference strip and a specified overlap of adjacent strips and enables utilization of the machine’s preferred working width.
The WR-series machines are also available with the Wirtgen Performance Tracker. The system registers all relevant location-specific working parameters to provide a database for construction site analysis and documentation. In the case of soil stabilizers, these include working width and depth, area and distance worked, fuel consumption and other parameters.
Developed by Wirtgen, the AutoPilot 2.0 is a control system for stringless paving that provides an alternative to the conventional method of mechanically scanning a stringline. The system, which controls both the machine’s height and steering, is available for all offset pavers and placer-spreaders. A GNSS signal and, depending on the configuration, various local sensors (an ultrasonic sensor on the machine) serve as a reference. The need for a stringline is eliminated and the time and effort otherwise required for setting one up and removing it is no longer required. It also enables paving of tight radii and complex geometries. The Wirtgen AutoPilot 2.0 system provides machine control and remote control from a single source.