James Trepanier - Academia.edu (original) (raw)

Uploads

Papers by James Trepanier

Research paper thumbnail of Hot-Mix Asphalt Sampling Techniques and Methods of Acceptance: State Department of Transportation’s Practice

Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA... more Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA) programs to ensure that the tested material is representative of the installed product. Samples of HMA in Illinois are currently taken from a truck at the plant. This sampling method allows for a quick turnaround time since the QC laboratory is usually located at the plant. However, it may be difficult to obtain a representative sample since most of the sample is taken from the top of the pile and on the side closest to the sampling platform. In addition, this sampling method does not account for any additional asphalt absorption taking place during transportation and placement. The concept of moving the sample location to the job site offers the potential to address the weaknesses cited above. However, there are a number of different approaches, each with advantages and disadvantages. The objective of this study was to produce a review of successful methods and practices currently used to sample HMA during production and installation. This included visiting other states and collecting sufficient data to draw a final recommendation for the optimum technique to be adopted for HMA sampling in Illinois. The conclusion of the field visits is that sampling behind the paver is being successfully conducted by many states without difficulty. Based on the site visits conducted in this study, the roadway sampling procedure adopted by Michigan DOT was recommended for possible implementation in Illinois. In addition to this sampling technique, sealed bags adopted by Iowa DOT may be used, if necessary, to safely transport samples from the field to the laboratory.

Research paper thumbnail of Hot-Mix Asphalt Sampling Techniques and Methods of Acceptance - State DOT's Practice

Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA... more Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA) programs to ensure that the tested material is representative of the installed product. Samples of HMA in Illinois are currently taken from a truck at the plant. This sampling method allows for a quick turnaround time since the QC laboratory is usually located at the plant. However, it may be difficult to obtain a representative sample since most of the sample is taken from the top of the pile and on the side closest to the sampling platform. In addition, this sampling method does not account for any additional asphalt absorption taking place during transportation and placement. The concept of moving the sample location to the job site offers the potential to address the weaknesses cited above. However, there are a number of different approaches, each with advantages and disadvantages. The objective of this study was to produce a review of successful methods and practices currently used to sample HMA during production and installation. This included visiting other states and collecting sufficient data to draw a final recommendation for the optimum technique to be adopted for HMA sampling in Illinois. The conclusion of the field visits is that sampling behind the paver is being successfully conducted by many states without difficulty. Based on the site visits conducted in this study, the roadway sampling procedure adopted by Michigan DOT was recommended for possible implementation in Illinois. In addition to this sampling technique, sealed bags adopted by Iowa DOT may be used, if necessary, to safely transport samples from the field to the laboratory.

Research paper thumbnail of Evaluation of RAP Impact on Hot-Mix Asphalt Design and Performance

Journal of the Association of Asphalt Paving Technologists, 2009

The objective of this paper is to investigate the reclaimed asphalt pavement (RAP) effect on hot-... more The objective of this paper is to investigate the reclaimed asphalt pavement (RAP) effect on hot-mix asphalt (HMA) volumetric and mechanical properties. An experimental program, including tests for measuring mixture complex moduli and fracture energy, was conducted. Six ...

Research paper thumbnail of Determination of Usable Residual Asphalt Binder in RAP

For current recycled mix designs, the Illinois Department of Transportation (IDOT) assumes 100% c... more For current recycled mix designs, the Illinois Department of Transportation (IDOT) assumes 100% contribution of working binder from Recycled Asphalt Pavement (RAP) materials when added to Hot Mix Asphalt (HMA). However, it is unclear if this assumption is correct and whether some binder may potentially be acting as "black rock," and not participating in the blending process with the new binder. Furthermore, it is also unclear whether binder modifications should be considered in the mix design for recycled HMA. The goal of this research was to determine if the current IDOT mix design practice required modification with respect to the use of RAP.

Research paper thumbnail of Laboratory Evaluation of Warm Mix Asphalt and Asphalt Mixtures with Recycled Materials

Transportation infrastructure poses significant challenges to sustainable development because its... more Transportation infrastructure poses significant challenges to sustainable development because its construction and maintenance require large amounts of material consumption, energy input, and capital investment. A refined systematic approach to the design, construction, and management of pavement systems is necessary to meet the objectives of sustainable development. The major components of sustainable development in pavement systems include economic and social considerations in addition to environmental preservation. Asphalt mixture design and construction practices are essential to the environmental component of sustainable development. These practices include, but are not limited to, asphaltic mixture reusing and recycling as well as innovative technologies considering energy efficiency and stormwater management. Performance and durability become a critical issue with the changes introduced to the mixtures. This paper briefly summarizes the evaluation of mixture design practices and the performance of asphalt mixtures prepared with various types of recycled materials and warm mix technologies.

Research paper thumbnail of Hot-Mix Asphalt Sampling Techniques and Methods of Acceptance - State DOT's Practice

Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA... more Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA) programs to ensure that the tested material is representative of the installed product. Samples of HMA in Illinois are currently taken from a truck at the plant. This sampling method allows for a quick turnaround time since the QC laboratory is usually located at the plant. However, it may be difficult to obtain a representative sample since most of the sample is taken from the top of the pile and on the side closest to the sampling platform. In addition, this sampling method does not account for any additional asphalt absorption taking place during transportation and placement. The concept of moving the sample location to the job site offers the potential to address the weaknesses cited above. However, there are a number of different approaches, each with advantages and disadvantages. The objective of this study was to produce a review of successful methods and practices currently used to sample HMA during production and installation. This included visiting other states and collecting sufficient data to draw a final recommendation for the optimum technique to be adopted for HMA sampling in Illinois. The conclusion of the field visits is that sampling behind the paver is being successfully conducted by many states without difficulty. Based on the site visits conducted in this study, the roadway sampling procedure adopted by Michigan DOT was recommended for possible implementation in Illinois. In addition to this sampling technique, sealed bags adopted by Iowa DOT may be used, if necessary, to safely transport samples from the field to the laboratory.

Research paper thumbnail of Tack Coat Optimization for HMA Overlays: Laboratory Testing

Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavem... more Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements can be one of the most significant factors affecting overlay service life. Various factors may affect the bonding condition at the interface, including HMA material,tack coat material, tack coat application rate, PCC surface texture, temperature, and moisture conditions. The objective of this study is to quantify the impact of these parameters on the permanent deformation of the HMA overlay. This study includes three major components to achieve the objective: laboratory testing, numerical modeling, and accelerated pavement testing. This report presents and analyzes the laboratory testing results. A direct shear test device was built and utilized to investigate the characteristics of the HMA-PCC interface and to determine the interface shear strength in the lab. Tests were run in monotonic mode at a constant loading rate of 0.47 in/min (12 mm/min). Test specimens were prepared using ...

Research paper thumbnail of Tack Coat Optimization for HMA Overlays: Accelerated Pavement Test Report

Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavem... more Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements is one of the most significant factors affecting overlay service life. This study was performed to quantify the effects of HMA type, tack coat type, tack coat application rate, and PCC surface texture on the interface bonding and overlay performance through laboratory testing, accelerated pavement testing (APT), and numerical modeling. This report presents the outcomes of the APT, as well as the numerical modeling of pavement interfaces. The results of the laboratory testing are covered in a companion report. The APT built on and validated previously completed laboratory tests where an HMA overlay was placed on top of an existing PCC pavement having various surface textures including smooth, transverse tined, longitudinal tined, and milled. In addition, zebra sections were included to evaluate the effect of non-uniform tack coat application. Asphalt emulsion SS-1hP and cutback aspha...

Research paper thumbnail of Mitigation of moisture damage in asphalt concrete: Testing techniques and additives/modifiers effectiveness

Construction and Building Materials, 2015

Research paper thumbnail of Achieving Desired Volumetrics and Performance for Mixtures with High Percentage of Reclaimed Asphalt Pavement

Transportation Research Record: Journal of the Transportation Research Board, 2012

Research paper thumbnail of Impact of High RAP Contents on Structural and Performance Properties of Asphalt Mixtures

Currently, highway agencies in Illinois are exploring the feasibility of using of higher amounts ... more Currently, highway agencies in Illinois are exploring the feasibility of using of higher amounts of reclaimed asphalt pavement (RAP) in asphalt mixtures. Concerns about variability in aggregate gradation and higher stiffness of aged RAP binder have limited this use, however. This research project was designed to characterize the performance of hot-mix asphalt (HMA) with high amounts of RAP and to identify any special considerations that must be met to utilize these higher RAP contents.

Research paper thumbnail of Thermal Cracking Potential in Asphalt Mixtures with High RAP Contents

Asphalt recycling is a key component of the sustainable practices in the pavement industry. Use o... more Asphalt recycling is a key component of the sustainable practices in the pavement industry. Use of reclaimed asphalt pavement (RAP) minimizes the construction cost as well as consumption of natural resources. Adding RAP, though, is believed to make the asphalt mixtures prone to thermal cracking by increasing their stiffness. A semi-circular bend (SCB) test was conducted to evaluate the low temperature cracking potential of asphalt mixtures with RAP, whereas, a flow number test was conducted to provide some insight into the gained stiffness. Eight asphalt mixtures with a high amount (up to 50%) of RAP were designed using two material sources. Two additional softer binders were used to prepare testing samples in order to evaluate the effect of binder grade bumping. Flow number test data showed significant improvement in potential rutting resistance of asphalt mixtures when RAP was added. However, thermal cracking potential may increase when RAP is added to asphalt mixtures. This effect could be reduced when binder double-pumped grade is used.

Research paper thumbnail of Hot-Mix Asphalt Sampling Techniques and Methods of Acceptance: State Department of Transportation’s Practice

Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA... more Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA) programs to ensure that the tested material is representative of the installed product. Samples of HMA in Illinois are currently taken from a truck at the plant. This sampling method allows for a quick turnaround time since the QC laboratory is usually located at the plant. However, it may be difficult to obtain a representative sample since most of the sample is taken from the top of the pile and on the side closest to the sampling platform. In addition, this sampling method does not account for any additional asphalt absorption taking place during transportation and placement. The concept of moving the sample location to the job site offers the potential to address the weaknesses cited above. However, there are a number of different approaches, each with advantages and disadvantages. The objective of this study was to produce a review of successful methods and practices currently used to sample HMA during production and installation. This included visiting other states and collecting sufficient data to draw a final recommendation for the optimum technique to be adopted for HMA sampling in Illinois. The conclusion of the field visits is that sampling behind the paver is being successfully conducted by many states without difficulty. Based on the site visits conducted in this study, the roadway sampling procedure adopted by Michigan DOT was recommended for possible implementation in Illinois. In addition to this sampling technique, sealed bags adopted by Iowa DOT may be used, if necessary, to safely transport samples from the field to the laboratory.

Research paper thumbnail of Hot-Mix Asphalt Sampling Techniques and Methods of Acceptance - State DOT's Practice

Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA... more Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA) programs to ensure that the tested material is representative of the installed product. Samples of HMA in Illinois are currently taken from a truck at the plant. This sampling method allows for a quick turnaround time since the QC laboratory is usually located at the plant. However, it may be difficult to obtain a representative sample since most of the sample is taken from the top of the pile and on the side closest to the sampling platform. In addition, this sampling method does not account for any additional asphalt absorption taking place during transportation and placement. The concept of moving the sample location to the job site offers the potential to address the weaknesses cited above. However, there are a number of different approaches, each with advantages and disadvantages. The objective of this study was to produce a review of successful methods and practices currently used to sample HMA during production and installation. This included visiting other states and collecting sufficient data to draw a final recommendation for the optimum technique to be adopted for HMA sampling in Illinois. The conclusion of the field visits is that sampling behind the paver is being successfully conducted by many states without difficulty. Based on the site visits conducted in this study, the roadway sampling procedure adopted by Michigan DOT was recommended for possible implementation in Illinois. In addition to this sampling technique, sealed bags adopted by Iowa DOT may be used, if necessary, to safely transport samples from the field to the laboratory.

Research paper thumbnail of Evaluation of RAP Impact on Hot-Mix Asphalt Design and Performance

Journal of the Association of Asphalt Paving Technologists, 2009

The objective of this paper is to investigate the reclaimed asphalt pavement (RAP) effect on hot-... more The objective of this paper is to investigate the reclaimed asphalt pavement (RAP) effect on hot-mix asphalt (HMA) volumetric and mechanical properties. An experimental program, including tests for measuring mixture complex moduli and fracture energy, was conducted. Six ...

Research paper thumbnail of Determination of Usable Residual Asphalt Binder in RAP

For current recycled mix designs, the Illinois Department of Transportation (IDOT) assumes 100% c... more For current recycled mix designs, the Illinois Department of Transportation (IDOT) assumes 100% contribution of working binder from Recycled Asphalt Pavement (RAP) materials when added to Hot Mix Asphalt (HMA). However, it is unclear if this assumption is correct and whether some binder may potentially be acting as "black rock," and not participating in the blending process with the new binder. Furthermore, it is also unclear whether binder modifications should be considered in the mix design for recycled HMA. The goal of this research was to determine if the current IDOT mix design practice required modification with respect to the use of RAP.

Research paper thumbnail of Laboratory Evaluation of Warm Mix Asphalt and Asphalt Mixtures with Recycled Materials

Transportation infrastructure poses significant challenges to sustainable development because its... more Transportation infrastructure poses significant challenges to sustainable development because its construction and maintenance require large amounts of material consumption, energy input, and capital investment. A refined systematic approach to the design, construction, and management of pavement systems is necessary to meet the objectives of sustainable development. The major components of sustainable development in pavement systems include economic and social considerations in addition to environmental preservation. Asphalt mixture design and construction practices are essential to the environmental component of sustainable development. These practices include, but are not limited to, asphaltic mixture reusing and recycling as well as innovative technologies considering energy efficiency and stormwater management. Performance and durability become a critical issue with the changes introduced to the mixtures. This paper briefly summarizes the evaluation of mixture design practices and the performance of asphalt mixtures prepared with various types of recycled materials and warm mix technologies.

Research paper thumbnail of Hot-Mix Asphalt Sampling Techniques and Methods of Acceptance - State DOT's Practice

Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA... more Hot-mix asphalt (HMA) sampling is a critical step in quality control and quality assurance (QC/QA) programs to ensure that the tested material is representative of the installed product. Samples of HMA in Illinois are currently taken from a truck at the plant. This sampling method allows for a quick turnaround time since the QC laboratory is usually located at the plant. However, it may be difficult to obtain a representative sample since most of the sample is taken from the top of the pile and on the side closest to the sampling platform. In addition, this sampling method does not account for any additional asphalt absorption taking place during transportation and placement. The concept of moving the sample location to the job site offers the potential to address the weaknesses cited above. However, there are a number of different approaches, each with advantages and disadvantages. The objective of this study was to produce a review of successful methods and practices currently used to sample HMA during production and installation. This included visiting other states and collecting sufficient data to draw a final recommendation for the optimum technique to be adopted for HMA sampling in Illinois. The conclusion of the field visits is that sampling behind the paver is being successfully conducted by many states without difficulty. Based on the site visits conducted in this study, the roadway sampling procedure adopted by Michigan DOT was recommended for possible implementation in Illinois. In addition to this sampling technique, sealed bags adopted by Iowa DOT may be used, if necessary, to safely transport samples from the field to the laboratory.

Research paper thumbnail of Tack Coat Optimization for HMA Overlays: Laboratory Testing

Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavem... more Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements can be one of the most significant factors affecting overlay service life. Various factors may affect the bonding condition at the interface, including HMA material,tack coat material, tack coat application rate, PCC surface texture, temperature, and moisture conditions. The objective of this study is to quantify the impact of these parameters on the permanent deformation of the HMA overlay. This study includes three major components to achieve the objective: laboratory testing, numerical modeling, and accelerated pavement testing. This report presents and analyzes the laboratory testing results. A direct shear test device was built and utilized to investigate the characteristics of the HMA-PCC interface and to determine the interface shear strength in the lab. Tests were run in monotonic mode at a constant loading rate of 0.47 in/min (12 mm/min). Test specimens were prepared using ...

Research paper thumbnail of Tack Coat Optimization for HMA Overlays: Accelerated Pavement Test Report

Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavem... more Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements is one of the most significant factors affecting overlay service life. This study was performed to quantify the effects of HMA type, tack coat type, tack coat application rate, and PCC surface texture on the interface bonding and overlay performance through laboratory testing, accelerated pavement testing (APT), and numerical modeling. This report presents the outcomes of the APT, as well as the numerical modeling of pavement interfaces. The results of the laboratory testing are covered in a companion report. The APT built on and validated previously completed laboratory tests where an HMA overlay was placed on top of an existing PCC pavement having various surface textures including smooth, transverse tined, longitudinal tined, and milled. In addition, zebra sections were included to evaluate the effect of non-uniform tack coat application. Asphalt emulsion SS-1hP and cutback aspha...

Research paper thumbnail of Mitigation of moisture damage in asphalt concrete: Testing techniques and additives/modifiers effectiveness

Construction and Building Materials, 2015

Research paper thumbnail of Achieving Desired Volumetrics and Performance for Mixtures with High Percentage of Reclaimed Asphalt Pavement

Transportation Research Record: Journal of the Transportation Research Board, 2012

Research paper thumbnail of Impact of High RAP Contents on Structural and Performance Properties of Asphalt Mixtures

Currently, highway agencies in Illinois are exploring the feasibility of using of higher amounts ... more Currently, highway agencies in Illinois are exploring the feasibility of using of higher amounts of reclaimed asphalt pavement (RAP) in asphalt mixtures. Concerns about variability in aggregate gradation and higher stiffness of aged RAP binder have limited this use, however. This research project was designed to characterize the performance of hot-mix asphalt (HMA) with high amounts of RAP and to identify any special considerations that must be met to utilize these higher RAP contents.

Research paper thumbnail of Thermal Cracking Potential in Asphalt Mixtures with High RAP Contents

Asphalt recycling is a key component of the sustainable practices in the pavement industry. Use o... more Asphalt recycling is a key component of the sustainable practices in the pavement industry. Use of reclaimed asphalt pavement (RAP) minimizes the construction cost as well as consumption of natural resources. Adding RAP, though, is believed to make the asphalt mixtures prone to thermal cracking by increasing their stiffness. A semi-circular bend (SCB) test was conducted to evaluate the low temperature cracking potential of asphalt mixtures with RAP, whereas, a flow number test was conducted to provide some insight into the gained stiffness. Eight asphalt mixtures with a high amount (up to 50%) of RAP were designed using two material sources. Two additional softer binders were used to prepare testing samples in order to evaluate the effect of binder grade bumping. Flow number test data showed significant improvement in potential rutting resistance of asphalt mixtures when RAP was added. However, thermal cracking potential may increase when RAP is added to asphalt mixtures. This effect could be reduced when binder double-pumped grade is used.