2200CR Road rehabilitation with Cement, Thailand

2200CR Road rehabilitation with Cement, Thailand

For over 10 years the cold in-place recycling process with cement has been a well-established procedure for road rehabilitation in Thailand and has achieved high levels of success. The process is designed for the rehabilitation of highly distressed pavements (asphalt and asphalt / base) with the Wirtgen cold recycler 2200 CR using cement as a binding agent. Exact application rates of cement are achieved using the latest technology, the Wirtgen slurry mixer WM 1000 or Streumaster cement spreader. Mix design and preliminary pavement investigation are carried out by local laboratories.

The WM 1000 slurry mixer is connected to the 2200 CR by means of a bar and is then pushed by the CR. The WM 1000 pre-mixes the required quantities of cement and water to form a slurry which is then injected directly into the 2200 CR mixing chamber by means of a spray bar mounted on the mixing chamber. The exact quantity of slurry is metered relative to the working speed. Alternatively the Streumaster cement spreader accurately spreads the required percentage of cement directly in front of the 2200 CR to minimise any dust emission. Water is injected into the mix by means of the 2200 CR water spray bar system.

The recycled material is pre-compacted by means of the integrated Vögele screed which has a working width of 2.2 m. Final compaction is achieved using 20-t Hamm singledrum compactors. As many as 70 Wirtgen 2200 CR / WM 1000 combinations are currently in operation in Thailand on a variety of job sites.

Contact : daniel.ong@wirtgen-group.com / info@mmsc.multicoasia.com

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