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Author: Zilong Wang
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 72
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Book Description
Pavement preservation can retard the development of pavement distresses and improve pavement functional performance. Quantification of the effectiveness of preservation has important implications for the selection of pavement maintenance strategies and decision making in pavement management system. Most of previous studies mainly focused on the effectiveness of preservation on pavement serviceability index (PCI) and roughness; few studies considered the effectiveness of preservation on individual pavement distresses and pavement surface friction. The objective of this thesis is to investigate the effectiveness of pavement preservation on mitigating multiple pavement distresses and restoring pavement surface friction. The datasets are selected from the Specific Pavement Studis-3 (SPS) experiments of the Long Term Pavement Performance (LTPP) program. The SPS-3 includes the performance of four preservation treatments (thin overlay, chip seal, crack seal, and slurry seal) under five design factors (traffic, temperature, precipitation, existing pavement condition, and subgrade type). The pavement distresses considered in the analysis include fatigue cracking, longitudinal cracking, transverse cracking, and rutting. The effectiveness of pavement preservation is quantified using the distress area ratio, which is associated with the areas under the distress curves after treatments and the distress curves with do-nothing. Statistical tests were used to compare the effectiveness of preservation treatments and identify the significant factors that affect the effectiveness of preservation. Results show that chip seals have little effectiveness in rutting prevention; slurry seals demonstrate effectiveness in longitudinal cracking; crack seals show effectiveness in fatigue cracking. On the other hand, the effectiveness of preservation treatments on pavement surface friction and the long-term variation of friction were investigated. The results of statistical analysis indicate that slurry seal causes significantly greater friction number compared to the control section. Stepwise regression analysis was conducted to quantify the influence of various factors on the long-term variation of pavement friction. The precipitation, freeze index, and pavement roughness showed significant correlation to the friction number in the regression models. The analysis results can aid state pavement agencies better select the appropriate maintenance treatments based on the existing pavement condition to maximize the effectiveness of preservation treatment.
Author: Zilong Wang
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 72
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Book Description
Pavement preservation can retard the development of pavement distresses and improve pavement functional performance. Quantification of the effectiveness of preservation has important implications for the selection of pavement maintenance strategies and decision making in pavement management system. Most of previous studies mainly focused on the effectiveness of preservation on pavement serviceability index (PCI) and roughness; few studies considered the effectiveness of preservation on individual pavement distresses and pavement surface friction. The objective of this thesis is to investigate the effectiveness of pavement preservation on mitigating multiple pavement distresses and restoring pavement surface friction. The datasets are selected from the Specific Pavement Studis-3 (SPS) experiments of the Long Term Pavement Performance (LTPP) program. The SPS-3 includes the performance of four preservation treatments (thin overlay, chip seal, crack seal, and slurry seal) under five design factors (traffic, temperature, precipitation, existing pavement condition, and subgrade type). The pavement distresses considered in the analysis include fatigue cracking, longitudinal cracking, transverse cracking, and rutting. The effectiveness of pavement preservation is quantified using the distress area ratio, which is associated with the areas under the distress curves after treatments and the distress curves with do-nothing. Statistical tests were used to compare the effectiveness of preservation treatments and identify the significant factors that affect the effectiveness of preservation. Results show that chip seals have little effectiveness in rutting prevention; slurry seals demonstrate effectiveness in longitudinal cracking; crack seals show effectiveness in fatigue cracking. On the other hand, the effectiveness of preservation treatments on pavement surface friction and the long-term variation of friction were investigated. The results of statistical analysis indicate that slurry seal causes significantly greater friction number compared to the control section. Stepwise regression analysis was conducted to quantify the influence of various factors on the long-term variation of pavement friction. The precipitation, freeze index, and pavement roughness showed significant correlation to the friction number in the regression models. The analysis results can aid state pavement agencies better select the appropriate maintenance treatments based on the existing pavement condition to maximize the effectiveness of preservation treatment.
Author: R. G. Hicks
Publisher: ASCE Publications
ISBN: 9780784475010
Category : Technology & Engineering
Languages : en
Pages : 168
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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.
Author: Gonzalo R. Rada
Publisher:
ISBN:
Category :
Languages : en
Pages : 306
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Book Description
Pavement preservation represents a proactive approach to maintaining and extending the lives of existing highway pavements. At the heart of the preservation decision-making process is pavement performance. This report documents the recommended experimental design for the LTPP SPS-11 Asphalt Concrete (AC) Pavement Preservation Study as well as the various elements required for its successful implementation. However, the recommended experiment will not be implemented under the LTPP program, but the experiment and this project report can be adopted and adapted by interested highway agencies to achieve the stated benefits, and consequently the impetus for publication of the report. The underlying concept of the experiment is to apply the same preservation treatment, at different times, on the same pavement structure to determine the effectiveness of a single application of a treatment as a function of pavement condition and time. This experiment is designed to answer the question on when is the best time to apply a preservation treatment on AC pavements. It will also enable development and implementation of important pavement preservation products and tools, such as addition of pavement preservation considerations to the AASHTO Mechanistic-Empirical Pavement Design Guide and associated software.
Author: Qiao Dong
Publisher: Elsevier
ISBN: 0443159297
Category : Technology & Engineering
Languages : en
Pages : 378
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Book Description
Data Analysis in Pavement Engineering: Theory and Methodology offers a complete introduction to the basis of the finite element method, covering fundamental theory and worked examples in the detail required for readers to apply the knowledge to their own engineering problems and understand more advanced applications. This edition sees the significant addition of content addressing coupling problems, including Finite element analysis formulations for coupled problems; Details of algorithms for solving coupled problems; and Examples showing how algorithms can be used to solve for piezoelectricity and poroelasticity problems. Focusing on the core knowledge, mathematical and analytical tools needed for successful application, this book represents the authoritative resource of choice for graduate-level students, researchers and professional engineers involved in finite element-based engineering analysis. This book is the first comprehensive resource to cover all potential scenarios of data analysis in pavement and transportation infrastructure research, including areas such as materials testing, performance modeling, distress detection, and pavement evaluation. It provides coverage of significance tests, design of experiments, data mining, data modeling, and supervised and unsupervised machine learning techniques. It summarizes the latest research in data analysis within pavement engineering, encompassing over 300 research papers. It delves into the fundamental concepts, elements, and parameters of data analysis, empowering pavement engineers to undertake tasks typically reserved for statisticians and data scientists. The book presents 21 step-by-step case studies, showcasing the application of the data analysis method to address various problems in pavement engineering and draw meaningful conclusions.
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 16
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Book Description
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 20
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Book Description
"This report summarizes the current status of the Long-Term Pavement Performance (LTPP) program and its major activities -- data collection, data storage, data analysis, and product development. It describes the work that will be needed beyond 2009 to realize the full potential of the world's most comprehensive pavement performance database and the benefits that will be accrued by capitalizing on the investment that has been made"--Page 2 of cover.
Author: Dennis A. Morian
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 236
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Book Description
Author: Turner-Fairbank Highway Research Center
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 4
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Book Description
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 0
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Book Description
This document is a technical summary of the Federal Highway Administration report, Impact of Design Features on Pavement Response and Performance in Rehabilitated Flexible and Rigid Pavements (FHWA-HRT-10-066). Rehabilitation and pavement preservation represent the majority of pavement construction activity in the United States. Preventive maintenance includes treatments that are applied to pavements primarily to delay development of and mitigate existing distresses. These treatments focus on improving pavement functional performance and prolonging pavement life, not on improving the structural capacity. Selecting the appropriate maintenance technique and treatment application timing form the basis of a preventive maintenance practice. In addition to a nontreated control section, the Specific Pavement Study (SPS)-3 experiment included the following four maintenance treatment alternatives: Thin hot mix asphalt overlay (typically 1 inch (25.4 mm) or less). Slurry seal. Crack seal. Chip seal. Additionally, each site was categorized according to the following five design factors: Moisture (wet or dry climate). Temperature (freeze or no-freeze zone). Subgrade type (fine grained or coarse grained). Traffic loading (low or high). Existing pavement condition (good, fair, or poor). This experimental design resulted in 48 different experimental combinations of factors. In total, 33 States and Canadian Provinces participated in the experiment, and 81 sites were constructed and monitored for the assessment.
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 146
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Book Description
