Summer 2011-paving

The Cold in-place Recycling (CiR) process has gained recognition and popularity as a cost-effective means of rehabilitating distressed road pavements without changing the pavement geometry or changing geometry with greater ease and less material.

A paving train is used, and consists of the milling machine, a screening-crushing unit, a mixing unit, and conventional lay down and rolling equipment. The paving train occupies one lane of traffic.

Cold in-place recycling involves removing the pavement with a specialized milling machine

The milled-up loose material is passed over a screen, and the oversize material is deposited into a crusher.

The proper-sized material is placed into the traveling plant pugmill for the addition of the emulsified asphalt or foamed asphalt

A computerized rate-control oil tank follows the pugmill and is connected to the mixing chamber with a flexible hose.

The mixed material comes out in a formed windrow that is straddled by the oil transport tanker.

The windrow is picked up by the paving machine and deposited back down in a smooth layer ready for compacting.

After sufficient time has been allowed for curing and drying, the material is compacted with a heavy rubber-tired roller. A steel drummed roller will be used later for a smooth finish.

One lane is completed at a time.