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Nondestructive Testing To Identify Delaminations Between Hma Layers, Volume 3 - Controlled Evaluation Reports, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Stephen D. Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen 2017 National Center for Asphalt Technology at Auburn University

Nondestructive Testing To Identify Delaminations Between Hma Layers, Volume 3 - Controlled Evaluation Reports, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Stephen D. Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen

Halil Ceylan

Asphalt pavements with delamination problems experience considerable early damage because delaminations provide paths for moisture damage and the development of damage such as stripping, slippage cracks, and pavement deformation. Early detection of the existence, extent, and depth of delaminations in asphalt pavements is key for determining the appropriate rehabilitation strategy and thus extending the life of the given pavement.


Nondestructive Testing To Identify Delaminations Between Hma Layers, Volume 4 - Uncontrolled Evaluation Reports, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Steve Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen 2017 National Center for Asphalt Technology at Auburn University

Nondestructive Testing To Identify Delaminations Between Hma Layers, Volume 4 - Uncontrolled Evaluation Reports, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Steve Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen

Halil Ceylan

Asphalt pavements with delamination problems experience considerable early damage because delaminations provide paths for moisture damage and the development of damage such as stripping, slippage cracks, and pavement deformation. Early detection of the existence, extent, and depth of delaminations in asphalt pavements is key for determining the appropriate rehabilitation strategy and thus extending the life of the given pavement.


Nondestructive Testing To Identify Delaminations Between Hma Layers Volume 1-Summary, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Stephen D. Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen 2017 National Center for Asphalt Technology at Auburn University

Nondestructive Testing To Identify Delaminations Between Hma Layers Volume 1-Summary, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Stephen D. Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen

Halil Ceylan

Several types of pavement surface distress can be attributed to delamination between hot-mix asphalt (HMA) layers. Longitudinal cracking in the wheel path and tearing in the surface are two common types of visual distress that are caused by delamination between layers. HMA delamination is primarily due to layer debonding or stripping. Debonding occurs when there is improper tack between paved HMA layers or between an HMA overlay and concrete pavement. Stripping develops when the aggregates and asphalt binder are incompatible, adhesion is lost, and water separates the asphalt binder from the aggregate. These conditions that cause pavement distress cannot be ...


Me Design Approach For Hma Overlaid Pcc Pavements, Halil Ceylan, Reshma Mathews, Tejeswi Kota, Kasthurirangan Gopalakrishnan, Brian Coree 2017 Iowa State University

Me Design Approach For Hma Overlaid Pcc Pavements, Halil Ceylan, Reshma Mathews, Tejeswi Kota, Kasthurirangan Gopalakrishnan, Brian Coree

Halil Ceylan

Highway pavements of portland cement concrete (PCC) type usually deteriorate due to distresses caused by a combination of traffic loads and weather conditions. The need for repair or rehabilitation depends on the type and level of distress. Repair and rehabilitation activities are carried out to extend the service life of the existing pavements. As total reconstruction is very expensive and time-consuming, rehabilitation is frequently considered to be a better alternative.


Investigation Of Aashtoware Pavement Me Design/Darwinme Performance Prediction Models For Iowa Pavement Analysis And Design, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim 2017 Iowa State University

Investigation Of Aashtoware Pavement Me Design/Darwinme Performance Prediction Models For Iowa Pavement Analysis And Design, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim

Halil Ceylan

The Mechanistic-Empirical Pavement Design Guide (MEPDG) was developed under National Cooperative Highway Research Program (NCHRP) Project 1-37A as a novel mechanistic-empirical procedure for the analysis and design of pavements. The MEPDG, published in 2008, was subsequently supported by AASHTO’s DARWin-ME pavement design software (starting in April 2011) and AASHTOWare Pavement ME Design was the next generation of pavement design software (as of February 2013).


Machine-Vision-Based Roadway Health Monitoring And Assessment: Development Of A Shape-Based Pavement-Crack-Detection Approach, Teng Wang, Kasthurirangan Gopalakrishnan, Arun K. Somani, Omar G. Smadi, Halil Ceylan 2017 Iowa State University

Machine-Vision-Based Roadway Health Monitoring And Assessment: Development Of A Shape-Based Pavement-Crack-Detection Approach, Teng Wang, Kasthurirangan Gopalakrishnan, Arun K. Somani, Omar G. Smadi, Halil Ceylan

Halil Ceylan

State highway agencies (SHAs) routinely employ semi-automated and automated image-based methods for network-level pavement-cracking data collection, and there are different types of pavement-cracking data collected by SHAs for reporting and management purposes. The main objective of this proof-of-concept research was to develop a shape-based pavement-crack-detection approach for the reliable detection and classification of cracks from acquired two-dimensional (2D) concrete and asphalt pavement surface images. The developed pavement-crack-detection algorithm consists of four stages: local filtering, maximum component extraction, polynomial fitting of possible crack pixels, and shape metric computation and filtering. After completing the crack-detection process, the width of each crack segment ...


Mepdg Work Plan Task No. 5: Characterization Of Unbound Materials (Soils/Aggregates) For Mechanistic-Empirical Pavement Design Guide, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim 2017 Iowa State University

Mepdg Work Plan Task No. 5: Characterization Of Unbound Materials (Soils/Aggregates) For Mechanistic-Empirical Pavement Design Guide, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim

Halil Ceylan

The resilient modulus (MR) input parameters in the Mechanistic-Empirical Pavement Design Guide (MEPDG) program have a significant effect on the projected pavement performance. The MEPDG program uses three different levels of inputs depending on the desired level of accuracy. The primary objective of this research was to develop a laboratory testing program utilizing the Iowa DOT servo-hydraulic machine system for evaluating typical Iowa unbound materials and to establish a database of input values for MEPDG analysis. This was achieved by carrying out a detailed laboratory testing program designed in accordance with the AASHTO T307 resilient modulus test protocol using common ...


Implementing The Mechanistic-Empirical Pavement Design Guide: Implementation Plan, Brian Coree, Halil Ceylan, Dale Harrington 2017 Iowa State University

Implementing The Mechanistic-Empirical Pavement Design Guide: Implementation Plan, Brian Coree, Halil Ceylan, Dale Harrington

Halil Ceylan

The current 1993 American Association of State Highway and Transportation Officials (AASHTO) Pavement Design Guide is based on the empirical interpretation of the results of the 1960 AASHTO Road Test. With the release of the new Mechanistic-Empirical (M-E) Pavement Design Guide, pavement design has taken a “quantum” leap forward.

In order to effectively and efficiently transition to the M-E Pavement Design Guide, state DOTs need a detailed implementation and training strategy. This document is a plan for the M-E Pavement Design Guide to be implemented in Iowa.


Nondestructive Evaluation Of Iowa Pavements-Phase I, Halil Ceylan, Alper Guclu, Mustafa Birkan Bayrak, Kasthurirangan Gopalakrishnan 2017 Iowa State University

Nondestructive Evaluation Of Iowa Pavements-Phase I, Halil Ceylan, Alper Guclu, Mustafa Birkan Bayrak, Kasthurirangan Gopalakrishnan

Halil Ceylan

Evaluating structural conditions of existing, in-service pavements is a part of the routine maintenance and rehabilitation activities undertaken by the most departments of transportation (DOTs). In the field, the pavement deflection profiles (or basins) gathered from the nondestructive falling weight deflectometer (FWD) test data are typically used to evaluate pavement structural conditions. Over the past decade, interest has increased in a new class of computational intelligence system, known as artificial neural networks (ANNs), for use in geomechanical and pavement systems applications. This report describes the development and use of ANN models as pavement structural analysis tools for the rapid and ...


Mepdg Work Plan Task No. 7: Existing Pavement Input Information For The Mechanistic-Empirical Pavement Design Guide, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim, Omar G. Smadi 2017 Iowa State University

Mepdg Work Plan Task No. 7: Existing Pavement Input Information For The Mechanistic-Empirical Pavement Design Guide, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim, Omar G. Smadi

Halil Ceylan

The objective of this study is to systematically evaluate the Iowa Department of Transportation’s (DOT’s) existing Pavement Management Information System (PMIS) with respect to the input information required for Mechanistic-Empirical Pavement Design Guide (MEPDG) rehabilitation analysis and design. To accomplish this objective, all of available PMIS data for interstate and primary roads in Iowa were retrieved from the Iowa DOT PMIS. The retrieved data were evaluated with respect to the input requirements and outputs for the latest version of the MEPDG software (version 1.0). The input parameters that are required for MEPDG HMA rehabilitation design, but currently ...


Mechanistic-Empirical Pavement Design Guide: Technical Report, Halil Ceylan, Brian Coree, Dale Harrington 2017 Iowa State University

Mechanistic-Empirical Pavement Design Guide: Technical Report, Halil Ceylan, Brian Coree, Dale Harrington

Halil Ceylan

With the release of the new Mechanistic-Empirical Pavement Design Guide (MEPDG), pavement design has taken a “quantum” leap forward. The current 1993 design guide is solidly based on the empirical interpretation of the results of the 1960 American Association of State Highway and Transportation Officials (AASHTO) Road Test. This report seeks to outline the technical aspects of the new MEPDG. Full detail is essentially impossible and impractical, since the release of the MEPDG was accompanied by eighteen volumes of technical justification and background. Consequently, this report seeks only to provide a potential user with a practical understanding of the workings ...


Nondestructive Testing To Identify Delaminations Between Hma Layers Volume 2-Theoretical Models, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Stephen D. Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen 2017 National Center for Asphalt Technology at Auburn University

Nondestructive Testing To Identify Delaminations Between Hma Layers Volume 2-Theoretical Models, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Stephen D. Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen

Halil Ceylan

Asphalt pavements with delamination problems experience considerable early damage because delaminations provide paths for moisture damage and the development of damage such as stripping, slippage cracks, and pavement deformation. Early detection of the existence, extent, and depth of delaminations in asphalt pavements is key for determining the appropriate rehabilitation strategy and thus extending the life of the given pavement.


Nondestructive Testing To Identify Delaminations Between Hma Layers, Volume 5 - Field Core Verification, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Steve Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen 2017 National Center for Asphalt Technology at Auburn University

Nondestructive Testing To Identify Delaminations Between Hma Layers, Volume 5 - Field Core Verification, Michael Heitzman, Kenneth Maser, Nam H. Tran, Ray Brown, Haley Bell, Steve Holland, Halil Ceylan, Kimberly Belli, Dennis Hiltunen

Halil Ceylan

Asphalt pavements with delamination problems experience considerable early damage because delaminations provide paths for moisture damage and the development of damage such as stripping, slippage cracks, and pavement deformation. Early detection of the existence, extent, and depth of delaminations in asphalt pavements is key for determining the appropriate rehabilitation strategy and thus extending the life of the given pavement.


Implementing The M-E Pavement Design Guide In Iowa, Brian Coree, Halil Ceylan 2017 Iowa State University

Implementing The M-E Pavement Design Guide In Iowa, Brian Coree, Halil Ceylan

Halil Ceylan

The reliability of the 1993 AASHTO Pavement Design Guide design method is questionable. The guide is based on methods that have evolved from theAASHTO Road Test (1958–1961). Through a number of editions from the initial publication (1962), the interim guide (1974), and other later editions, minor changes and improvements have been published. Nonetheless, these later modifications have not materially altered the original methods, which are based on empirical regression techniques relating simple material characterizations, traffic characterization, and measures of performance. In addition, the current AASHTO Pavement Design Guide does not provide performance prediction of pavements.


Impacts Of Overweight Implements Of Husbandry On Minnesota Roads And Bridges, Brent M. Phares, Terry J. Wipf, Halil Ceylan 2017 Iowa State University

Impacts Of Overweight Implements Of Husbandry On Minnesota Roads And Bridges, Brent M. Phares, Terry J. Wipf, Halil Ceylan

Halil Ceylan

Over the past few decades, the national industry has seen the number of farms decrease with a simultaneous increase in the average farm size. With larger farms and continuously improving farming techniques, the need to increase production and efficiency has affected equipment carrying capacity and completely changed the tools being used. During select seasons, it is common to have single -axle loads on secondary roads and bridges that exceed normal load limits (typical examples are grain carts and manure wagons). Even though these load levels occur only during a short period of time of the year (fall for grain carts ...


Impact Of Early-Age Behaviors On Pavement Smoothness, Halil Ceylan, Sunghwan Kim, Dave Turner, R. O. Rasmussen, G K. Chang, J. Grove 2017 Iowa State University

Impact Of Early-Age Behaviors On Pavement Smoothness, Halil Ceylan, Sunghwan Kim, Dave Turner, R. O. Rasmussen, G K. Chang, J. Grove

Halil Ceylan

Knowledge of how pavement temperature variations affect pavement curvature is essential for understanding the effects on joint shifting, vertical slab movement, and overall pavement smoothness.


Improving The Accuracy And Usability Of Iowa Falling Weight Deflectometer Data, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim 2017 Iowa State University

Improving The Accuracy And Usability Of Iowa Falling Weight Deflectometer Data, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim

Halil Ceylan

This study aims to improve the accuracy and usability of Iowa Falling Weight Deflectometer (FWD) data by incorporating significant enhancements into the fully-automated software system for rapid processing of the FWD data. These enhancements include: (1) refined prediction of backcalculated pavement layer modulus through deflection basin matching/optimization, (2) temperature correction of backcalculated Hot-Mix Asphalt (HMA) layer modulus, (3) computation of 1993 AASHTO design guide related effective SN (SNeff) and effective k-value (keff ), (4) computation of Iowa DOT asphalt concrete (AC) overlay design related Structural Rating (SR) and k-value (k), and (5) enhancement of user-friendliness of input and output from ...


Machine-Vision-Based Roadway Health Monitoring And Assessment: Development Of A Shape-Based Pavement-Crack-Detection Approach, Kasthurirangan Gopalakrishnan, Omar G. Smadi, Halil Ceylan, Koray Celik, Arun K. Somani 2017 Iowa State University, USA

Machine-Vision-Based Roadway Health Monitoring And Assessment: Development Of A Shape-Based Pavement-Crack-Detection Approach, Kasthurirangan Gopalakrishnan, Omar G. Smadi, Halil Ceylan, Koray Celik, Arun K. Somani

Halil Ceylan

State highway agencies (SHAs) routinely employ semi-automated and automated image-based methods for network-level pavement-cracking data collection, and there are different types of pavement-cracking data collected by SHAs for reporting and management purposes. The main objective of this proof-of-concept research was to develop a shape-based pavement-crack-detection approach for the reliable detection and classification of cracks from acquired two-dimensional (2D) concrete and asphalt pavement surface images. The developed pavement-crack-detection algorithm consists of four stages: local filtering, maximum component extraction, polynomial fitting of possible crack pixels, and shape metric computation and filtering. After completing the crack-detection process, the width of each crack segment ...


Iowa Calibration Of Mepdg Performance Prediction Models, Halil Ceylan, Sunghwan Kim, Kasthurirangan Gopalakrishnan, Di Ma 2017 Iowa State University

Iowa Calibration Of Mepdg Performance Prediction Models, Halil Ceylan, Sunghwan Kim, Kasthurirangan Gopalakrishnan, Di Ma

Halil Ceylan

This study aims to improve the accuracy of AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG) pavement performance predictions for Iowa pavement systems through local calibration of MEPDG prediction models. A total of 130 representative pavement sites across Iowa were selected. The selected pavement sites represent flexible, rigid, and composite pavement systems throughout Iowa. The required MEPDG inputs and the historical performance data for the selected sites were extracted from a variety of sources. The accuracy of the nationally-calibrated MEPDG prediction models for Iowa conditions was evaluated. The local calibration factors of MEPDG performance prediction models were identified to improve the accuracy ...


Investigation Of Electromagnetic Gauges For Determining In-Place Hma Density, Andrea N. Kvasnak, R. Christopher Williams, Halil Ceylan, Kasthurirangan Gopalakrishnan 2017 Iowa State University

Investigation Of Electromagnetic Gauges For Determining In-Place Hma Density, Andrea N. Kvasnak, R. Christopher Williams, Halil Ceylan, Kasthurirangan Gopalakrishnan

Halil Ceylan

Density is an important component of hot-mix asphalt (HMA) pavement quality and long-term performance. Insufficient density of an in-place HMA pavement is the most frequently cited construction-related performance problem.

This study evaluated the use of electromagnetic gauges to nondestructively determine densities. Field and laboratory measurements were taken with two electromagnetic gauges—a PaveTracker and a Pavement Quality Indicator (PQI). Test data were collected in the field during and after paving operations and also in a laboratory on field mixes compacted in the lab.

This study revealed that several mix- and project-specific factors affect electromagnetic gauge readings. Consequently, the implementation of ...


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