Dynapac’s rollers ... paving Turkey’s motorways.
Dynapac paves Turkish roads
01 February 2006
Turkish contractor Tisan Insaat has recently taken delivery of two new Dynapac CC 322 tandem asphalt rollers and two reconditioned Demag DF 130 C pavers for a repavement contract on the Istanbul-Edirne Motorway, awarded by Turkish Highways Maintenance (TCK).
The contract has required Tisan Insaat to repave 62 km of the Edirne-Istanbul motorway between Mahmutbey and Kinali.
“As a direct result of the contract, the contractor purpose-ordered two new Dynapac CC 322 tandem asphalt rollers and also took delivery of two reconditioned DF 130 C pavers from local dealer Teknomak Makina Insaat Ticaret Ve Sanayi, to expand its paving fleet,” says a Dynapac spokesman.
Completing the Dynapac paving train for the contract is a CP 221 pneumatic-tyred roller.
Typically, the new Dynapac paving train will be repaving selected sections such as the 10 km sector between Selimpasa and Silivra, where an average of 13 cm of old asphalt is removed and replaced with a 5 cm wearing course and 8 cm binder course.
“Working over 100 m sections at a time, the Dynapac CC 322 tandem asphalt rollers typically make four passes to achieve the specified compaction density,” says the spokesman. “Two passes by the Dynapac CP 221 ensure additional surface smoothness to complete the new pavement.”
Dynapac C 322
Delivered by Teknomak in June last year, the Dynapac CC 322 is a compact tandem roller with 1,680 mm-wide drums. With an operational weight of 8.5 tonnes, the roller is adapted to thin and normal asphalt courses, with the same output as a 10 to 12-tonne roller and has been designed to meet an asphalt capacity of up to 1,800 sq m/h, says the spokesman.
Ankara ring road maintenance
“The ring road around the Turkish capital also requires year-round maintenance in a contract held by leading local contractor Onur since the 127 km long peripheral highway opened in 1997. The Highways Department check the ring road on a regular basis and specify when and where the road needs to be repaired, as well as the milling depth.
For most repair work, milling is usually to a depth of between 5 to 12 cm with working widths of up to 2 m. The ring road has six, eight and, in some sections, 10 lanes, all of which are 3.5 m wide.
Apart from heavy traffic volume, a major problem is underground water, which causes the sub-base to move – causing cracks to appear in the road surface. Once milling has been completed, the Dynapac F 14 C paver is used to lay the new wearing course to the required depth in 4 m-wide sections, says the spokesman.
The paver has a maximum working width of 8 m – which equates to more than two lanes on the Ankara ring road. The unit has a hopper capacity of 12.5 tonnes and can easily pave 500 tonnes per hour, he concludes.
