A rural road in Indiana was selected for rehabilitation and widening in 1986. The project was carried out as a study to investigate the feasibility of using cold in-place recycling in the state of Indiana. The highway selected was a 20-ft-wide low-volume road. One-half of the 9.85-mi project was cold in-place recycled and widened to 24 ft, and the other half was widened in the conventional way by adding 2-ft-wide strips on each side of the existing roadway. The entirepavement was then overlaid with hot mix bituminous mixture. An evaluation after 5 years in service indicates that the recycled half of the highway is performing better than the conventionally treated half. Field investigations indicate less distress and an absence of widening cracks on the recycled pavement. Laboratory tests on the fieldcores also indicate a generally better pavement condition in the recycled half. The other half of the pavement is showing serious distress in the form of widening cracks reflected upward and some alligator cracking. This half of the pavement will need rehabilitation muchearlier than the recycled part. (A)
Abstract