Technology: cold milling
Efficient removal and granulation of road pavement layers
Cold milling machines are used to remove asphalt and concrete surfaces quickly and efficiently. In doing so, they create a level foundation with the specified width and depth that is required for paving new surface layers of uniform thickness. When pavements are milled in layers, the milled material can be separated and selectively recovered according to mix type.
Discover the operating principle and technical components of cold milling technology. Learn more about the different types of cold milling machines and our front and rear loading systems.
Components of modern small milling machines
Small milling machines offer high mobility and flexibility. These wheeled machines are used for milling small areas and precision milling in confined spaces. The milling drum is located at the rear of the machine.
Precise, intuitive levelling with LEVEL PRO PLUS
Efficient multifunctional armrest
Perfect visibility, comfort and ergonomics
Effective steering functions
Dynamic and quick manoeuvring
Time-saving inward pivoting of the right rear wheel
Superior cutting technology for maximum performance
High loading capacity for maximum performance
High traction through optimum weight distribution
Highest productivity in its class
Components of modern compact milling machines
The highly flexible compact milling machines combine the advantages of the small and large milling machine classes. The lightweight, manoeuvrable front loaders can be used in confined spaces and, thanks to their high level of performance, are suitable for a wide range of applications. Wheeled or tracked undercarriage.
Precise, intuitive levelling with LEVEL PRO PLUS
Efficient multifunctional armrest
Unrivalled all-round visibility concept
Comfort and ergonomic design on the operator’s platform
Time-saving inward pivoting of the right rear track unit
Quick and precise manoeuvring
Outstanding milling performance in all applications
Outstanding loading performance and flexibility
High-performance engines for tremendous productivity
High traction and optimised weight
Components of modern large milling machines
Due to their high milling performance, large milling machines are particularly suitable for the rehabilitation of large paved areas. The front loaders are equipped with four hydraulically steerable and height-adjustable crawler units, with the milling drum positioned centrally beneath the machine.
Intuitive HMI – human/machine interface
Precise. Versatile, high-precision LEVEL PRO ACTIVE levelling system
Outstanding reliability
Resource-efficient machine technology
Outstanding features of the operator’s platform
Unparalleled cutting technology
Innovative MILL ASSIST
Reduced diesel fuel consumption
The advantages of cold milling technology
Cold milling is a globally recognised construction method that is characterised by outstanding efficiency and the decisive role it plays in the recycling of construction materials. Thanks to its unique experience and expertise in milling technology, WIRTGEN is continuously expanding the range of applications for cold milling machines. As an innovation leader, WIRTGEN always delivers results for demanding applications and develops field-proven, productive solutions – often together with customers.
A wide range of efficient applications
A variety of milling drums – such as fine milling drums or ECO-Cutters – make it possible to carry out a wide range of milling jobs in asphalt rehabilitation. In addition, specially configured cold milling machines can also be used in the fields of milling concrete or rock. Examples of applications for rock milling machines include routing operations, lowering track beds or lowering the bottom of tunnels. Other special machine modifications allow steep gradient milling up to a 35° bank sloping angle when working on dams, canals and compensating reservoirs. Cold milling machines are also frequently used in the field of pipeline construction, the digging of trenches or milling grooves and slots. In short, the range of applications is gigantic.
Cold milling machines to meet the requirements of every market
Each market is unique and has its own specific needs. WIRTGEN offers a comprehensive range of individually tailored products and solutions to meet these specific needs: the portfolio of cold milling machines includes a multitude of models which fully meet the various market-specific requirements. In this context, WIRTGEN’s high level of customer-focused design and engineering expertise guarantees market-driven innovations.
For example, WIRTGEN realises cost-effective, industry-leading solutions based on varying local, regional and national legal regulations with regard to road widths, maximum permissible transport weights, emission limits and differences in climate and infrastructure.
In Japan, for example, road lanes often have to be milled out flush to the edges on both sides without the cold milling machine making any turns. The W 200 Hi is the ideal choice for this job as it offers zero edges on both sides. In addition, the W 200 Hi features state-of-the-art engine technology to comply with the stringent specifications of the US Tier 4f exhaust emission standard applicable in Japan.
Resource-friendly machine technology
With its efficient technologies, WIRTGEN makes an important contribution to the conservation of natural resources and the reduction of harmful emissions throughout the construction process chain. Milled material such as reclaimed asphalt pavement is a valuable construction material, up to 100% of which can be reused in the production of asphalt mixes. On large milling machines with the ‘Dual Engine Concept’, the second engine can be switched off depending on the operation in order to save diesel fuel and reduce emissions. The innovative MILL ASSIST machine control system significantly reduces the operator’s workload while improving machine performance and considerably reducing diesel fuel consumption, CO₂ emissions and noise.
During the milling process, fine material particles and water vapour are generated in the milling drum assembly. WIRTGEN offers an extraction system for road milling machines with a front-loading system that reduces the amount of airborne particles.
