A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rehabilitation of a Continuously Reinforced Concrete Pavement in Virginia
Asphalt overlays are typically used to extend the service life of continuously reinforced concrete pavement (CRCP) because they can be placed in one or more layers while traffic uses the adjacent lane and they can be opened to traffic in a short time. However, asphalt overlays must be replaced or resurfaced approximately every 10 years. Hydraulic cement concrete (HCC) overlays have also been used on occasion to rehabilitate and extend the life of CRCP longer than an asphalt overlay. However, HCC overlays are often not considered as an alternative to asphalt because of the higher initial cost of HCC. As the price of asphalt continues to increase, HCC overlays are becoming more competitive on an initial cost basis and more economical on a life cycle cost basis. The Virginia Department of Transportation recently initiated a project to rehabilitate a CRCP on US 58 using both bonded and unbonded concrete overlays. US 58 Westbound in Southampton County (MP 16.13 to MP 20.90) was selected as the candidate for the concrete overlay application. In Southampton County, US 58 is a four-lane, divided primary highway. Within the project limits, the existing pavement is an 8-in. continuously reinforced concrete pavement (CRCP) placed over a 6-in. cement treated aggregate (CTA) layer. VDOT specifies CTA as the dense graded aggregate stabilized with 4% cement by weight. The project includes two different overlay applications. The eastern portion of the pavement (about 2.6 miles) is a 4-in. bonded concrete overlay and the western section (about 2.2 miles) is a 7-in. unbonded concrete overlay with 1-in. asphalt separation layer. Saw cutting is used to form joints at 6-ft by 6-ft panels for unbonded overlay. Dowels are not used at the joints but tie bars are used along the center line of the pavement and on both shoulders. The shoulders along the unbounded overlay have the same concrete thickness as the mainline. The shoulders along the bonded overlay are asphalt. The objective of this project is to evaluate both bonded and unbonded hydraulic cement concrete (HCC) overlays to determine if they are a cost-effective and practical solution for extending the service life of existing CRCP. Initial conditions of the pavement and overlays along with the construction challenges are summarized.
Rehabilitation of a Continuously Reinforced Concrete Pavement in Virginia
Asphalt overlays are typically used to extend the service life of continuously reinforced concrete pavement (CRCP) because they can be placed in one or more layers while traffic uses the adjacent lane and they can be opened to traffic in a short time. However, asphalt overlays must be replaced or resurfaced approximately every 10 years. Hydraulic cement concrete (HCC) overlays have also been used on occasion to rehabilitate and extend the life of CRCP longer than an asphalt overlay. However, HCC overlays are often not considered as an alternative to asphalt because of the higher initial cost of HCC. As the price of asphalt continues to increase, HCC overlays are becoming more competitive on an initial cost basis and more economical on a life cycle cost basis. The Virginia Department of Transportation recently initiated a project to rehabilitate a CRCP on US 58 using both bonded and unbonded concrete overlays. US 58 Westbound in Southampton County (MP 16.13 to MP 20.90) was selected as the candidate for the concrete overlay application. In Southampton County, US 58 is a four-lane, divided primary highway. Within the project limits, the existing pavement is an 8-in. continuously reinforced concrete pavement (CRCP) placed over a 6-in. cement treated aggregate (CTA) layer. VDOT specifies CTA as the dense graded aggregate stabilized with 4% cement by weight. The project includes two different overlay applications. The eastern portion of the pavement (about 2.6 miles) is a 4-in. bonded concrete overlay and the western section (about 2.2 miles) is a 7-in. unbonded concrete overlay with 1-in. asphalt separation layer. Saw cutting is used to form joints at 6-ft by 6-ft panels for unbonded overlay. Dowels are not used at the joints but tie bars are used along the center line of the pavement and on both shoulders. The shoulders along the unbounded overlay have the same concrete thickness as the mainline. The shoulders along the bonded overlay are asphalt. The objective of this project is to evaluate both bonded and unbonded hydraulic cement concrete (HCC) overlays to determine if they are a cost-effective and practical solution for extending the service life of existing CRCP. Initial conditions of the pavement and overlays along with the construction challenges are summarized.
Rehabilitation of a Continuously Reinforced Concrete Pavement in Virginia
Sprinkel, Michael (author) / Ozyildirim, Celik (author) / Elfino, Mohamed (author) / Hossain, Shabbir (author) / Wu, Chung (author) / Habib, Affan (author)
2013 Airfield & Highway Pavement Conference ; 2013 ; Los Angeles, California, United States
Airfield and Highway Pavement 2013 ; 336-349
2013-06-18
Conference paper
Electronic Resource
English
Bonded Concrete Overlays for Rehabilitation of Continuously Reinforced Concrete Pavement
| British Library Conference Proceedings | 1993
Continuously-reinforced concrete pavement
Engineering Index Backfile | 1963
Continuously reinforced concrete pavement
| TIBKAT | 1973
Continuously reinforced concrete pavement
| UB Braunschweig | 1973