ACPA Quarter 4 2018

Concrete Pavement Progress www.acpa.org 18 Chester Unbonded Concrete Overlay Project, Chester, WV CONTRACTOR: Golden Triangle Construction Co., Inc. OWNER: West Virginia DOT ENGINEER: West Virginia DOT The West Virginia State Highway Route 30 unbonded concrete overlay project was the first concrete overlay constructed in the state. The project consisted of 20,000 SY of 7 in. concrete overlay on Route 30; a concrete overlay on four ramps; variable depth concrete reconstruction at the overlay transition areas; and concrete preservation (patching) operation on Route 2, which runs north and south at the interchange of Route 30. The proposed overlay was constructed on a 1 in. asphalt separation layer on the existing 9 in. plain concrete pavement roadway. The plan also called for 8 in. deep asphalt shoulders adjacent to the overlay. After the project was awarded, Golden Triangle ap- proached the West Virginia Department of Highways with some welcome changes, including constructing 8 in. deep concrete shoulders in lieu of asphalt at no additional cost to the Department. The contractor replaced the entire Route 2 concrete roadway for the same cost as patching the roadway would have been. Golden Triangle also was able to min- imize disruption to the business owners by designing a traffic scheme to allow Route 30 traffic to continue during the overlay construction. The overlay portion of the schedule was originally supposed to be complete in nine days with a $10,000 per day incentive/disincentive clause. The revised plan allowed more time to construct the overlay without the major disruption of the long de- tour, and as a result, the contract was completed in less than four months without liquidated damages. The cold, wet spring delayed the paving schedule, but crews worked 10 hours per day, six days per week during to complete the paving in time for the first day of school in late August. Overlays, Highways US Highway 71, Clay County, IA CONTRACTOR: Cedar Valley Corp., LLC OWNER: Iowa DOT ENGINEER: Iowa DOT US Highway 71 is a major north-south artery that intersects east-west US Highway 20. The highway was originally paved with 7 in. concrete in 1931, but asphalt overlays had deteriorated so badly that some areas had been repaired with full-depth pavement. Cedar Valley Corp. performed the work on this 6.88 mi. project, which called for milling the existing highway and placing a 124,000 SY of nominal 6 in. unbonded concrete overlay. The Iowa DOT determined different saw-cut patterns were necessary over the full-depth asphalt compared to the pattern called for over the composite sections. The DOT specified sawing the concrete overlay on top of the full depth asphalt sections in 6 ft. by 6 ft. panels. Composite sections, which made up about 47% of the project, were treated differently. The sawing pattern for those sections created 8 ft. by 9 ft. panels. To transition between the full-depth asphalt sections and the composite sections, the DOT specified that 15 lineal ft. of 16 in. concrete was to be placed on the 32 ft-wide pavement. The plan did not address how to transition successfully between the two different saw cut patterns. CVC solved the issue by sawing the joint at each edge of the five transitional 15 lin- eal foot, full depth sections full-depth and transversely to stop the longitudinal saw joints from propagating across the panel. Another problem was how to maintain access and haul concrete through these transitional areas, which was addressed by filling half the pavement transition area with rock and haul material. Then after reaching the transition area, a fine-grade crew then removed the rock and fine- graded the transition panel to the correct 10-in. depth. Cedar Valley completed the entire project ahead of schedule, earning $118,500 in time incentive pay. The contractor also earned 83.3% of the smoothness incen- tive, earning a $95,500. Overlays, Highways E X C E L L E N C E A W A R D S MEMBER MEMBER