Author: Michael D. Elwardany
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 26
Book Description
The purpose of pavement-preservation treatments is to correct surface defects, improve ride quality, improve safety characteristics, and extend pavement life without increasing the structural capacity of the pavement. The application of a thin overlay is expected to extend the life of a pavement by 8–10 yr, although this range may vary depending on traffic, environmental conditions, quality of the materials, and workmanship. Thin overlays do not significantly increase the structural capacity of a pavement. Thus, the existing pavement condition should be evaluated carefully prior to the application of a thin overlay to ensure that structural rehabilitation is not necessary. A set of guidelines to determine the best time to apply thin-overlay treatments would help highway agencies optimize their budgets, thereby leading to potentially significant taxpayer savings. The objective of this study was to develop guidelines, parameters, and performance-prediction equations to select the most appropriate time to apply a thin-overlay treatment based on the condition of the existing pavement. To arrive at the proposed guidelines, data from the Long-Term Pavement Performance (LTPP) Program Specific Pavement Studies 3 and 5 were used to evaluate the effects of climate, traffic, existing asphalt concrete (AC)–layer thickness, and overlay thickness on the life extension that results from the application of thin-overlay treatments. The results demonstrate that threshold triggers based on longitudinal cracking in the wheel path and rutting severity can be used to select the best time to apply a thin overlay in order to achieve a target pavement-life extension. Analysis of the LTPP data shows that both the traffic level and existing AC-layer thickness significantly affect the life extension that results from the application of a thin overlay in terms of retarding rutting and longitudinal cracking, respectively. This paper presents empirical equations to predict the life gain that can be achieved from a thin-overlay treatment based on the existing pavement conditions.
Proposed Performance-prediction Equations and Threshold Triggers for Thin-overlay Treatments Using the Long-term Pavement Performance Database
Author: Michael D. Elwardany
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 26
Book Description
The purpose of pavement-preservation treatments is to correct surface defects, improve ride quality, improve safety characteristics, and extend pavement life without increasing the structural capacity of the pavement. The application of a thin overlay is expected to extend the life of a pavement by 8–10 yr, although this range may vary depending on traffic, environmental conditions, quality of the materials, and workmanship. Thin overlays do not significantly increase the structural capacity of a pavement. Thus, the existing pavement condition should be evaluated carefully prior to the application of a thin overlay to ensure that structural rehabilitation is not necessary. A set of guidelines to determine the best time to apply thin-overlay treatments would help highway agencies optimize their budgets, thereby leading to potentially significant taxpayer savings. The objective of this study was to develop guidelines, parameters, and performance-prediction equations to select the most appropriate time to apply a thin-overlay treatment based on the condition of the existing pavement. To arrive at the proposed guidelines, data from the Long-Term Pavement Performance (LTPP) Program Specific Pavement Studies 3 and 5 were used to evaluate the effects of climate, traffic, existing asphalt concrete (AC)–layer thickness, and overlay thickness on the life extension that results from the application of thin-overlay treatments. The results demonstrate that threshold triggers based on longitudinal cracking in the wheel path and rutting severity can be used to select the best time to apply a thin overlay in order to achieve a target pavement-life extension. Analysis of the LTPP data shows that both the traffic level and existing AC-layer thickness significantly affect the life extension that results from the application of a thin overlay in terms of retarding rutting and longitudinal cracking, respectively. This paper presents empirical equations to predict the life gain that can be achieved from a thin-overlay treatment based on the existing pavement conditions.
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 26
Book Description
The purpose of pavement-preservation treatments is to correct surface defects, improve ride quality, improve safety characteristics, and extend pavement life without increasing the structural capacity of the pavement. The application of a thin overlay is expected to extend the life of a pavement by 8–10 yr, although this range may vary depending on traffic, environmental conditions, quality of the materials, and workmanship. Thin overlays do not significantly increase the structural capacity of a pavement. Thus, the existing pavement condition should be evaluated carefully prior to the application of a thin overlay to ensure that structural rehabilitation is not necessary. A set of guidelines to determine the best time to apply thin-overlay treatments would help highway agencies optimize their budgets, thereby leading to potentially significant taxpayer savings. The objective of this study was to develop guidelines, parameters, and performance-prediction equations to select the most appropriate time to apply a thin-overlay treatment based on the condition of the existing pavement. To arrive at the proposed guidelines, data from the Long-Term Pavement Performance (LTPP) Program Specific Pavement Studies 3 and 5 were used to evaluate the effects of climate, traffic, existing asphalt concrete (AC)–layer thickness, and overlay thickness on the life extension that results from the application of thin-overlay treatments. The results demonstrate that threshold triggers based on longitudinal cracking in the wheel path and rutting severity can be used to select the best time to apply a thin overlay in order to achieve a target pavement-life extension. Analysis of the LTPP data shows that both the traffic level and existing AC-layer thickness significantly affect the life extension that results from the application of a thin overlay in terms of retarding rutting and longitudinal cracking, respectively. This paper presents empirical equations to predict the life gain that can be achieved from a thin-overlay treatment based on the existing pavement conditions.
Long-Term Performance Program
Author: R. G. Hicks
Publisher: ASCE Publications
ISBN: 9780784475010
Category : Technology & Engineering
Languages : en
Pages : 168
Book Description
Sponsored by the Highway Division of ASCE; Long-Term Performance Program of the Federal Highway Administration. This collection contains papers from the International Contest on LTPP [Long-Term Performance Program] Data Analysis 1998-1999. This competition involved university students in the analysis of data in the LTPP database. Topics include: effect of locked-in curvature on portland cement concrete pavement; evaluation of a pavement performance prediction model using LTPP data; prediction of pavement performance?a neural network approach; and effectiveness of preventative maintenance strategies for asphalt concrete pavements based on LTPP distress data.
Publisher: ASCE Publications
ISBN: 9780784475010
Category : Technology & Engineering
Languages : en
Pages : 168
Book Description
Sponsored by the Highway Division of ASCE; Long-Term Performance Program of the Federal Highway Administration. This collection contains papers from the International Contest on LTPP [Long-Term Performance Program] Data Analysis 1998-1999. This competition involved university students in the analysis of data in the LTPP database. Topics include: effect of locked-in curvature on portland cement concrete pavement; evaluation of a pavement performance prediction model using LTPP data; prediction of pavement performance?a neural network approach; and effectiveness of preventative maintenance strategies for asphalt concrete pavements based on LTPP distress data.
Long-term Pavement Performance Program (LTPP) Data Analysis Support
Author: N. Jackson
Publisher:
ISBN:
Category : Life cycle costing
Languages : en
Pages : 268
Book Description
Publisher:
ISBN:
Category : Life cycle costing
Languages : en
Pages : 268
Book Description
Long-term Pavement Performance Program
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 16
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 16
Book Description
Long-term Pavement Performance
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 146
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 146
Book Description
Pavement Performance Equations
Author: Joe P. Mahoney
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 58
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 58
Book Description
Longterm pavement performance information management system pavement performance database user reference guide
Author:
Publisher: DIANE Publishing
ISBN: 1428995234
Category :
Languages : en
Pages : 172
Book Description
Publisher: DIANE Publishing
ISBN: 1428995234
Category :
Languages : en
Pages : 172
Book Description
Improving Pavements with Long-Term Pavement Performance
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 108
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 108
Book Description
Long-term Pavement Performance (LTPP) Data Analysis Support
Author: Newton C. Jackson
Publisher:
ISBN:
Category : Life cycle costing
Languages : en
Pages : 244
Book Description
Publisher:
ISBN:
Category : Life cycle costing
Languages : en
Pages : 244
Book Description
Long Term Pavement Performance
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages :
Book Description