A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Eight-Year Field Performance of Portland Cement and Asphalt Stabilized Full-Depth Reclamation Projects
The long-term performance of in situ recycled pavements under service loads has rarely been documented. A number of performance-related questions remain unanswered as to how different pavement recycling methods compare to traditional techniques, such as mill and overlay. This research investigated and compared the structural and functional condition of three full-depth reclamation (FDR) projects. Rutting, fatigue cracking, transverse cracking, and international roughness index (IRI) performance were used to assess the pavement’s functional condition. FDR is a deep in situ pavement recycling method involving pulverizing and reusing existing materials from distressed pavements. Trial sections were constructed in 2008 as part of a Virginia Department of Transportation (VDOT) FDR demonstration project. Foamed asphalt (2.7% with 1% cement), asphalt emulsion (3.5%), and Portland cement (5%) were used as stabilizing treatments for the base layers. Several distress surveys were conducted for the pavement sections, both before and after construction. An automated road analyzer was used to collect distress data over a period of 8 years. Rutting was higher for the foamed asphalt and emulsion sections, but remained well below the maximum allowed by VDOT. The structural and functional capacities of the pavements improved irrespective of the stabilizing treatment used. The load-related distresses seemed to be more critical to the overall condition of the asphalt sections, while the non-load related distresses played a key role in the cement sections. The IRI was better for the cement-stabilized sections compared to the asphalt-stabilized sections. The FDR sections performed better compared to their corresponding reference sections.
Eight-Year Field Performance of Portland Cement and Asphalt Stabilized Full-Depth Reclamation Projects
The long-term performance of in situ recycled pavements under service loads has rarely been documented. A number of performance-related questions remain unanswered as to how different pavement recycling methods compare to traditional techniques, such as mill and overlay. This research investigated and compared the structural and functional condition of three full-depth reclamation (FDR) projects. Rutting, fatigue cracking, transverse cracking, and international roughness index (IRI) performance were used to assess the pavement’s functional condition. FDR is a deep in situ pavement recycling method involving pulverizing and reusing existing materials from distressed pavements. Trial sections were constructed in 2008 as part of a Virginia Department of Transportation (VDOT) FDR demonstration project. Foamed asphalt (2.7% with 1% cement), asphalt emulsion (3.5%), and Portland cement (5%) were used as stabilizing treatments for the base layers. Several distress surveys were conducted for the pavement sections, both before and after construction. An automated road analyzer was used to collect distress data over a period of 8 years. Rutting was higher for the foamed asphalt and emulsion sections, but remained well below the maximum allowed by VDOT. The structural and functional capacities of the pavements improved irrespective of the stabilizing treatment used. The load-related distresses seemed to be more critical to the overall condition of the asphalt sections, while the non-load related distresses played a key role in the cement sections. The IRI was better for the cement-stabilized sections compared to the asphalt-stabilized sections. The FDR sections performed better compared to their corresponding reference sections.
Eight-Year Field Performance of Portland Cement and Asphalt Stabilized Full-Depth Reclamation Projects
Amarh, E. A. (author) / Flintsch, G. W. (author) / Fernandez-Gomez, W. (author) / Diefenderfer, B. K. (author) / Bowers, B. F. (author)
International Airfield and Highway Pavements Conference 2019 ; 2019 ; Chicago, Illinois
Airfield and Highway Pavements 2019 ; 263-272
2019-07-18
Conference paper
Electronic Resource
English
| British Library Online Contents | 2015
Georgia's Use of Cement-Stabilized Reclaimed Base in Full-Depth Reclamation
| British Library Conference Proceedings | 2006
Georgia's Use of Cement-Stabilized Reclaimed Base in Full-Depth Reclamation
| British Library Online Contents | 2006