Jaeseung Kim - Academia.edu (original) (raw)

Papers by Jaeseung Kim

STATE MATERIALS OFFICE TABLE OF CONTENTS

KSCE Journal of Civil Engineering, 2018

An efficient computation method that allows for evaluating the capability of pavement structures ... more An efficient computation method that allows for evaluating the capability of pavement structures subjected to realistic loading conditions on fatigue cracking is important for pavement engineers. This study developed a fast and reliable computation algorithm, based on evaluating the fatigue cracking resistance of flexible pavements using the principle of the multiaxial Viscoelastic Continuum Damage Mechanics (VECD). For this purpose, a viscoelastic analysis was derived for the viscoelastic multilayered pavement systems under a moving load and used for integrating the multiaxial VECD model into the developed solution. Because of the analytical nature of the algorithm, stiffness reduction by means of pseudo stiffness could be directly evaluated at any location and at any loading repetition over a three-dimensional pavement structure. The resulted evaluation indicated that overall fatigue cracking performance of pavement structures could be assessed by the bottom pseudo stiffness; however, the probability of top-down cracking was high in pavement structures with thick asphalt layers.

Transportation Research Record: Journal of the Transportation Research Board, 2009

Reclaimed asphalt pavement (RAP) mixtures have shown good resistance to rutting for hot-mix aspha... more Reclaimed asphalt pavement (RAP) mixtures have shown good resistance to rutting for hot-mix asphalt (HMA) pavement. Mixtures with polymer-modified binders such as styrene-butadiene-styrene (SBS) have also shown good performance against rutting and cracking. This paper presents the laboratory evaluations used to determine the rutting and cracking performance of the RAP mixtures with SBS polymer-modified binders as virgin binders. The asphalt pavement analyzer (APA) test and indirect tensile (IDT) test were conducted for the laboratory evaluation. The properties of SBS polymer-modified binders blended with recovered RAP binders were also investigated. The binder tests included G*/sinδ as the rutting parameter and G*sinδ as the cracking parameter of the Super-pave® PG grade system. The multiple stress creep and recovery test, which has recently received attention as an indicator of the rutting potential of polymer-modified asphalt binders, was also performed. RAP mixtures with SBS poly...

Journal of Materials in Civil Engineering, 2008

Creep compliance (or relaxation modulus), which is a fundamental property that determines the str... more Creep compliance (or relaxation modulus), which is a fundamental property that determines the strain (or stress) development in flexible pavements or damage evolution in asphalt mixtures, can be determined from either a creep compliance test using static loading or a ...

Canadian Journal of Civil Engineering, 2011

ABSTRACT

Instability rutting, which is shear related and occurs when the compacted mix cannot resist near ... more Instability rutting, which is shear related and occurs when the compacted mix cannot resist near surface critical stress conditions, is a major distress mode in flexible pavements. According to a NCHRP Report 465, the point at which excessive deformations occur from laboratory rut testing is the most important factor that determines the rutting performance of asphalt mixtures. However, a clear and complete failure mechanism has not been identified. This research focuses on identifying a rheology model and a failure criterion for asphalt mixtures that are loaded under repeated shearing forces at high temperature. From the results of laboratory rut testing, it was found that a linear viscoelastic approach appears valid and suitable for characterizing the rutting behavior of asphalt mixtures, and an energy-based failure mechanism appears to be a valid shear failure criterion. From this observation, the parameter “shear failure time” developed in this study, appears to have potential fo...

Journal of Engineering Mechanics, 2010

For this study, the Binzhou perpetual pavement test sections constructed in Shandong Province, Ch... more For this study, the Binzhou perpetual pavement test sections constructed in Shandong Province, China, were simulated for long-term fatigue performance using the layered viscoelastic pavement analysis for critical distresses (LVECD) finite element software package. In this framework, asphalt concrete was treated in the context of linear viscoelastic continuum damage theory. A recently developed unified fatigue failure criterion that defined the boundaries of the applicable region of the theory was also incorporated. The mechanistic modeling of the fatigue mechanisms was able to accommodate the complex temperature variations and loading conditions of the field pavements in a rigorous manner. All of the material models were conveniently characterized by dynamic modulus tests and direct tension cyclic fatigue tests in the laboratory using cylindrical specimens. By comparing the obtained damage characteristic curves and failure criteria, it is found that mixtures with small aggregate particle sizes, a dense gradation, and modified asphalt binder tended to exhibit the best fatigue resistance at the material level. The 15-year finite element structural simulation results for all the test sections indicate that fatigue performance has a strong dependence on the thickness of the asphalt pavements. Based on the predicted location and severity of the fatigue damage, it is recommended that sections 1 and 3 of the Binzhou test sections be employed for perpetual pavement design.

Road Materials and Pavement Design, 2006

An asphalt mixture's ability to absorb energy without fracturing is directly related to crac... more An asphalt mixture's ability to absorb energy without fracturing is directly related to cracking performance of asphalt pavement. The dissipated energy per load cycle is commonly determined as the area of the hysteresis loop developed during cyclic loading of asphalt mixture. However, it is unclear whether all dissipated energy determined in this manner is irreversible and associated with damage, or whether it is at least partially reversible and not fully associated with damage. Therefore, this study was undertaken to evaluate the nature of the dissipated energy determined from the area of the hysteresis loop developed during cyclic loading of asphalt mixture. Dissipated energies determined experimentally from cyclic load tests were compared to dissipated energies predicted using rheological parameters determined from static creep tests. For a range of asphalt mixtures, the area of the hysteresis loop appeared to be strongly affected by the delayed elastic behavior of the mixture, even when cyclic response had reached steady-state conditions. Therefore, it appears that the area of the hysteresis loop is not fully associated with damage and very probably overestimates the rate of dissipated energy and damage development during cyclic load testing of asphalt mixture. Furthermore, it is generally not possible to reliably separate reversible from irreversible dissipated energy in the hysteresis loop using conventional complex modulus data. Consequently, it is recommended that irreversible dissipated energy be determined using rheological parameters obtained from static creep test data. The key is to have parameters in the rheological model that properly separate the elastic (immediate and delayed) from the viscous response, since only the viscous response is irreversible and contributes to damage

Transportation Research Record: Journal of the Transportation Research Board, 2009

ABSTRACT

Transportation Research Record: Journal of the Transportation Research Board, 2010

Thermal stress on the surfaces of pavements located in mild climates has been commonly considered... more Thermal stress on the surfaces of pavements located in mild climates has been commonly considered to have a negligible effect on pavement performance. Current pavement design methodology focuses on maximum tensile stress rather than tensile stresses occurring over the design life of pavements. To identify the significance of thermal stress on pavement performance through structural stress analysis, this study investigated the predictive capability of the enhanced integrated climate model by comparing it with measured temperature data and introducing an analytical methodology of estimating thermal stress development using the dynamic modulus test. The identified thermal stresses were compared with the tensile stresses occurring at the bottom of an asphalt layer through the analysis method employed in the Guide for Mechanistic–Empirical Design of New and Rehabilitated Pavement Structures. Damage caused by the thermal and bottom stresses was evaluated on the basis of the damage ratio d...

Journal of Transportation Engineering, 2012

ABSTRACT

Journal of ASTM International, 2005

Journal of Materials in Civil Engineering, 2009

ABSTRACT

Journal of Materials in Civil Engineering, 2011

ABSTRACT

Journal of Materials in Civil Engineering, 2009

Journal of Engineering Mechanics, 2010

ABSTRACT

The contents of this report reflect the views of the authors who are responsible for the facts an... more The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views of policies for the Alabama Department of Transportation,

Journal of the Association of Asphalt …, 2008

... There was development of appropriate equations for DCSE accumulation and thermal stress devel... more ... There was development of appropriate equations for DCSE accumulation and thermal stress development calculations for thermal loading cycle-subjected asphalt mixtures. ... Publication Date: 2008. Serial: Journal of the Association of Asphalt Paving Technologists ...

Journal of Engineering Mechanics, 2012

ABSTRACT

STATE MATERIALS OFFICE TABLE OF CONTENTS

KSCE Journal of Civil Engineering, 2018

An efficient computation method that allows for evaluating the capability of pavement structures ... more An efficient computation method that allows for evaluating the capability of pavement structures subjected to realistic loading conditions on fatigue cracking is important for pavement engineers. This study developed a fast and reliable computation algorithm, based on evaluating the fatigue cracking resistance of flexible pavements using the principle of the multiaxial Viscoelastic Continuum Damage Mechanics (VECD). For this purpose, a viscoelastic analysis was derived for the viscoelastic multilayered pavement systems under a moving load and used for integrating the multiaxial VECD model into the developed solution. Because of the analytical nature of the algorithm, stiffness reduction by means of pseudo stiffness could be directly evaluated at any location and at any loading repetition over a three-dimensional pavement structure. The resulted evaluation indicated that overall fatigue cracking performance of pavement structures could be assessed by the bottom pseudo stiffness; however, the probability of top-down cracking was high in pavement structures with thick asphalt layers.

Transportation Research Record: Journal of the Transportation Research Board, 2009

Reclaimed asphalt pavement (RAP) mixtures have shown good resistance to rutting for hot-mix aspha... more Reclaimed asphalt pavement (RAP) mixtures have shown good resistance to rutting for hot-mix asphalt (HMA) pavement. Mixtures with polymer-modified binders such as styrene-butadiene-styrene (SBS) have also shown good performance against rutting and cracking. This paper presents the laboratory evaluations used to determine the rutting and cracking performance of the RAP mixtures with SBS polymer-modified binders as virgin binders. The asphalt pavement analyzer (APA) test and indirect tensile (IDT) test were conducted for the laboratory evaluation. The properties of SBS polymer-modified binders blended with recovered RAP binders were also investigated. The binder tests included G*/sinδ as the rutting parameter and G*sinδ as the cracking parameter of the Super-pave® PG grade system. The multiple stress creep and recovery test, which has recently received attention as an indicator of the rutting potential of polymer-modified asphalt binders, was also performed. RAP mixtures with SBS poly...

Journal of Materials in Civil Engineering, 2008

Creep compliance (or relaxation modulus), which is a fundamental property that determines the str... more Creep compliance (or relaxation modulus), which is a fundamental property that determines the strain (or stress) development in flexible pavements or damage evolution in asphalt mixtures, can be determined from either a creep compliance test using static loading or a ...

Canadian Journal of Civil Engineering, 2011

ABSTRACT

Instability rutting, which is shear related and occurs when the compacted mix cannot resist near ... more Instability rutting, which is shear related and occurs when the compacted mix cannot resist near surface critical stress conditions, is a major distress mode in flexible pavements. According to a NCHRP Report 465, the point at which excessive deformations occur from laboratory rut testing is the most important factor that determines the rutting performance of asphalt mixtures. However, a clear and complete failure mechanism has not been identified. This research focuses on identifying a rheology model and a failure criterion for asphalt mixtures that are loaded under repeated shearing forces at high temperature. From the results of laboratory rut testing, it was found that a linear viscoelastic approach appears valid and suitable for characterizing the rutting behavior of asphalt mixtures, and an energy-based failure mechanism appears to be a valid shear failure criterion. From this observation, the parameter “shear failure time” developed in this study, appears to have potential fo...

Journal of Engineering Mechanics, 2010

For this study, the Binzhou perpetual pavement test sections constructed in Shandong Province, Ch... more For this study, the Binzhou perpetual pavement test sections constructed in Shandong Province, China, were simulated for long-term fatigue performance using the layered viscoelastic pavement analysis for critical distresses (LVECD) finite element software package. In this framework, asphalt concrete was treated in the context of linear viscoelastic continuum damage theory. A recently developed unified fatigue failure criterion that defined the boundaries of the applicable region of the theory was also incorporated. The mechanistic modeling of the fatigue mechanisms was able to accommodate the complex temperature variations and loading conditions of the field pavements in a rigorous manner. All of the material models were conveniently characterized by dynamic modulus tests and direct tension cyclic fatigue tests in the laboratory using cylindrical specimens. By comparing the obtained damage characteristic curves and failure criteria, it is found that mixtures with small aggregate particle sizes, a dense gradation, and modified asphalt binder tended to exhibit the best fatigue resistance at the material level. The 15-year finite element structural simulation results for all the test sections indicate that fatigue performance has a strong dependence on the thickness of the asphalt pavements. Based on the predicted location and severity of the fatigue damage, it is recommended that sections 1 and 3 of the Binzhou test sections be employed for perpetual pavement design.

Road Materials and Pavement Design, 2006

An asphalt mixture's ability to absorb energy without fracturing is directly related to crac... more An asphalt mixture's ability to absorb energy without fracturing is directly related to cracking performance of asphalt pavement. The dissipated energy per load cycle is commonly determined as the area of the hysteresis loop developed during cyclic loading of asphalt mixture. However, it is unclear whether all dissipated energy determined in this manner is irreversible and associated with damage, or whether it is at least partially reversible and not fully associated with damage. Therefore, this study was undertaken to evaluate the nature of the dissipated energy determined from the area of the hysteresis loop developed during cyclic loading of asphalt mixture. Dissipated energies determined experimentally from cyclic load tests were compared to dissipated energies predicted using rheological parameters determined from static creep tests. For a range of asphalt mixtures, the area of the hysteresis loop appeared to be strongly affected by the delayed elastic behavior of the mixture, even when cyclic response had reached steady-state conditions. Therefore, it appears that the area of the hysteresis loop is not fully associated with damage and very probably overestimates the rate of dissipated energy and damage development during cyclic load testing of asphalt mixture. Furthermore, it is generally not possible to reliably separate reversible from irreversible dissipated energy in the hysteresis loop using conventional complex modulus data. Consequently, it is recommended that irreversible dissipated energy be determined using rheological parameters obtained from static creep test data. The key is to have parameters in the rheological model that properly separate the elastic (immediate and delayed) from the viscous response, since only the viscous response is irreversible and contributes to damage

Transportation Research Record: Journal of the Transportation Research Board, 2009

ABSTRACT

Transportation Research Record: Journal of the Transportation Research Board, 2010

Thermal stress on the surfaces of pavements located in mild climates has been commonly considered... more Thermal stress on the surfaces of pavements located in mild climates has been commonly considered to have a negligible effect on pavement performance. Current pavement design methodology focuses on maximum tensile stress rather than tensile stresses occurring over the design life of pavements. To identify the significance of thermal stress on pavement performance through structural stress analysis, this study investigated the predictive capability of the enhanced integrated climate model by comparing it with measured temperature data and introducing an analytical methodology of estimating thermal stress development using the dynamic modulus test. The identified thermal stresses were compared with the tensile stresses occurring at the bottom of an asphalt layer through the analysis method employed in the Guide for Mechanistic–Empirical Design of New and Rehabilitated Pavement Structures. Damage caused by the thermal and bottom stresses was evaluated on the basis of the damage ratio d...

Journal of Transportation Engineering, 2012

ABSTRACT

Journal of ASTM International, 2005

Journal of Materials in Civil Engineering, 2009

ABSTRACT

Journal of Materials in Civil Engineering, 2011

ABSTRACT

Journal of Materials in Civil Engineering, 2009

Journal of Engineering Mechanics, 2010

ABSTRACT

The contents of this report reflect the views of the authors who are responsible for the facts an... more The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views of policies for the Alabama Department of Transportation,

Journal of the Association of Asphalt …, 2008

... There was development of appropriate equations for DCSE accumulation and thermal stress devel... more ... There was development of appropriate equations for DCSE accumulation and thermal stress development calculations for thermal loading cycle-subjected asphalt mixtures. ... Publication Date: 2008. Serial: Journal of the Association of Asphalt Paving Technologists ...

Journal of Engineering Mechanics, 2012

ABSTRACT