Eshan V. Dave

Eshan V. Dave
University of New Hampshire | UNH · Department of Civil Engineering

PhD

About

157
Publications
29,876
Reads
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1,465
Citations
Additional affiliations
August 2010 - December 2014
University of Minnesota Duluth
Position
  • Professor (Assistant)

Publications

Publications (157)
Conference Paper
Dans des travaux de recherche antérieurs, l'essai de fendage par coin est utilisé pour caractériser à la rupture le collage des interfaces entre couches de matériaux de chaussée dont l'enrobé bitumineux, constituant principal de ces structures. Du fait de la grande taille des éprouvettes prélevées in situ, des interfaces secondaires correspondant à...
Article
This study compared and explored the relationship between laboratory oven conditioning and field curing, using materials from six CIR projects and various field and laboratory testing procedures. The results indicate that the test methods considered in this study effectively tracked the curing process of laboratory and in-situ CIR materials. The da...
Article
Recycling agent (RA) is typically used to restore or rejuvenate the properties of aged asphalt to desired properties. This study was motivated to comprehensively characterize the performance of asphalt mixtures treated with RA. The overarching goal of the research project is to provide guidance to agencies for revising asphalt mixture specification...
Article
This paper describes the development of novel/state-of-art computational framework to accurately predict the degree of binder activity of a reclaimed asphalt pavement sample as a percentage of the indirect tensile strength (ITS) using a reduced number of input variables that are relatively easy to obtain, namely compaction temperature, air voids an...
Article
Most cold in-place recycling (CIR) construction uses asphalt emulsion or foamed asphalt as stabilizing agent, which requires placing and compacting at optimum moisture or fluid content in the field. To ensure the CIR layer gains appreciable mechanical capacity to support traffic (including that of construction vehicles), the CIR layer must cure. Cu...
Article
Fundamental linear viscoelastic (LVE) characteristics of asphalt material is a critical component of pavement performance analysis and modelling. This study presents a practical and innovative approach to predict the complex modulus (E*) if terms of dynamic modulus (|E*|) and phase angle (δ) for asphalt mixtures by means of predicting the shape par...
Article
The purpose of this research is to provide a comprehensive evaluation of the effects of a solid pelletized plastomeric polymer on asphalt mixtures’ properties and performance with respect to different distresses. Five asphalt mixtures—a control mixture (no polymer); asphalt mixtures with 2.5%, 5.0%, and 7.5% polymer content; and a mixture with 5% p...
Article
The purpose of this paper is to provide a robust process to statistically analyze reflective cracking field performance data. There is often a lack of consistency and transparency in statistical analysis of pavement field performance data, which may not satisfy ANOVA or regression modeling assumptions. Twelve full-scale asphalt concrete (AC) overla...
Article
Disk-shaped compact tension (DCT) testing is a commonly used low-temperature fracture test to determine the cracking resistance of asphalt mixtures. The current testing specification only considers the fracture energy (Gf) from load-crack mouth opening displacement test data. However, Gf does not directly take into consideration the behavior of the...
Presentation
Full-text available
A State-of-the-Art Review: Approaches for Assessing the Compatibility of Asphalt Materials and Additives
Article
Full-text available
This recommendation is based on the results of an inter-laboratory study organised by the RILEM technical committee TC 264-RAP "Asphalt Pavement Recycling"—Task Group 3 (TG3) focusing on Asphalt Binder for Recycled Asphalt Mixture. The TG3 aimed to evaluate the effect of a specific family of materials known as asphalt recycling agent (ARA) on the a...
Article
This paper presents an augmented full quadratic model (AFQM), artificial neural network (ANN) and an innovative machine learning technique called self-validated ensemble modelling (SVEM) approaches to predict low-temperature fracture energy of asphalt mixtures. An experimental database including 852 fracture energy values obtained from low temperat...
Chapter
Full-text available
The use of rejuvenators has seen a consistent increase over the years in the asphalt pavement industry. This is due to the need for maximizing the demand for incorporating a higher amount of Reclaimed Asphalt (RA) in the pavement asphalt mixtures. In order to tackle this challenge, the Task Group 3, focusing on asphalt binders and additives, of the...
Chapter
Full-text available
Cold recycling of reclaimed asphalt (RA) is a promising technique to build or to maintain roads, combining performance and environmental advantages. Although this technique has been extensively used worldwide, there is no unique and internationally-shared method to characterize cold recycled mixtures. The previous work of the RILEM TC 237-SIB TG6 s...
Chapter
Full-text available
Black space diagrams (BSD) representing rheological data of bituminous materials in the form of dynamic modulus (|G*| or |E*|) versus phase angle (δ) have been successfully used for interpretation of material behavior. Previous studies have used BSD for identification of testing geometry compliance errors when testing over multiple temperatures and...
Chapter
Performance-engineered mix designs and performance-based specifications for asphalt mixtures rely on not only establishing performance properties but relevance and representation of field performance of asphalt mixtures. This paper presents a comparative evaluation of various performance indices from fracture tests with respect to asphalt mix prope...
Chapter
Cold recycling with BSMs is becoming a very common technique, nevertheless there are minimal constitutive models available that can fully characterize their mechanical response in pavement systems. The aim of this research project was to identify the intrinsic material properties through a finite element simulation of triaxial tests performed in la...
Chapter
Full-text available
The Task Group 2 of the RILEM Technical Committee 264-RAP on non-cold recycling identified the need to gather some insights about possible durability issues associated with the combination of Warm Mix Asphalt (WMA) and of Reclaimed Asphalt (RA) in order to prioritize the characterization or research needs for relevant damage types. For this purpose...
Chapter
Reliable characterization of asphalt binder properties with aging, as a function of pavement service life, is crucial to improving asphalt binder specifications as well as modification and formulation methods. The objective of this study is to evaluate how the thermo-rheological indices of asphalt binders change over time, and explore their potenti...
Chapter
While substantial research has focused on incorporation of Reclaimed Asphalt Pavement (RAP) in hot-mixed asphalt mixtures, there is a knowledge gap related to performance of stabilized base courses. This study evaluated the laboratory performance of stabilized base courses with 100% RAP and total stabilizing agent amount of 3% (by weight of RAP). T...
Chapter
Cold recycling techniques are becoming more and more popular everywhere in the world, as it is well proven that bituminous stabilized mixtures (BSM) are sustainable both from an environmental and economical point of view. There have been limited studies focusing on the performance of BSMs with respect to the service lives of pavement structures wit...
Article
Full-text available
This study compared and explored the relationship between laboratory oven conditioning and field curing, using materials and data from six CIR projects. Laboratory fabricated CIR specimens were oven-cured at a temperature of 25°C, equivalent to the average air temperature observed in the project locations during field evaluation. Ultimately, variou...
Conference Paper
Full-text available
In order to nurture development of the cities of tomorrow, the urban transportation infrastructure needs to be safe, sustainable and resilient.The main objective of this paper is to present a climate-change informed life-cycle assessment (LCA) framework to aid in design, maintenance, and operational decisions of urban and suburban roadways with the...
Article
The majority of the pavements in the world are surfaced with asphalt mixes. Milling is a necessary step for the removal of aged or distressed Hot Mix Asphalt (HMA) materials and recovery of Reclaimed Asphalt Pavement (RAP) for rehabilitation of asphalt pavements. The objective of this study was to predict the milling-induced stresses for two asphal...
Article
[Available at https://ascelibrary.org/doi/full/10.1061/%28ASCE%29MT.1943-5533.0003919] The mechanical behavior of cold recycled asphalt mixtures (CRAM) is influenced by its composition and limited studies have focused on exploration of nonlinear elastic behavior of CRAM. This study evaluates the effect of the nonlinear elastic properties of a CRAM...
Article
This paper presents a generalized framework for determining mechanistically informed layer coefficients (a-values) for asphalt mixtures in the AASHTO empirical pavement design approach. The layer coefficients influence the layer thicknesses and consequently the structural capacity of pavements. Therefore, it is critical to determine reliable mechan...
Article
Cracking is one of the primary distresses in asphalt pavements, and aging can significantly affect the cracking properties of asphalt material. The primary objective of this study is to investigate comparisons and correlations between binder and mixture cracking property parameters subjected to different aging conditions, and further evaluate how t...
Article
Aging has a significant effect on the performance of asphalt material. Reliable modelling of the change of asphalt mixture properties over time is crucial to evaluating and predicting the performance of the designed pavement. The objective of this study is to develop an aging model to accurately predict the cracking performance of asphalt mixtures...
Article
The infiltration of water in pavement layers due to heavy precipitation, snow melting, surface water flow, or ground water fluctuation can lead to a substantial change in pavement performance under traffic loading. The extent of this change depends on several complex and interdependent factors such as climatic and mechanical stressors, hydro-geolog...
Article
Non-floating oil is challenging to detect, track, and recover due to limited visibility inhibiting verification of the oil's location and subsurface movement. Oil that sinks to the bottom (i.e., sunken oil) can form large mats or small agglomerates on the bottom, mix into sediments, or remobilize into the water column and move with currents potenti...
Article
Climate change poses a threat to the performance and resiliency of flexible pavement systems around the world and can lead to inadequate designs or shortened service life which, in turn, tax the already limited budgets of transportation agencies and increase user costs. This paper aims to provide a high-level overview of three common approaches (sc...
Article
This work presents the development of new fatigue performance indices for asphalt binders based on viscoelastic continuum damage (VECD) theory and failure energy. Five plant-produced asphalt mixtures were subjected to three different conditioning levels (short-term ageing during production and loose mix ageing for 5 and 12 days at 95°C in the labor...
Article
Full-text available
Aging can significantly affect the performance of asphalt mixtures, causing increase in stiffness, reduction in relaxation capability and increase in cracking susceptibility. It is also well known that fundamental viscoelastic properties are used for design and modelling of asphalt mixtures and pavement structures to addressing rutting, fatigue and...
Preprint
Full-text available
This document provides a 2-page overview for the white paper titled Asphalt Emulsion Cold In-Place Recycling Mix Design Practices: Designing a Semi-Bound Pavement Material.
Preprint
Full-text available
Through the advent of new materials, advancements in technology, increased understanding of material characterization, as well as changing structural demands on pavements, mix design procedures have transitioned from an empirical approach toward an engineered methodology. After well over 100 years of use, mix design procedures for both unbound gran...
Conference Paper
Full-text available
The growing use of reclaimed asphalt (RAP) results in a continuous increase in the percentage of added RAP to hot mix asphalt. Within the asphalt pavement, the asphalt binder is the component which is affected the most by the ageing during service life, resulting in considerable hardening of the RAP binder. Therefore, the aged binder needs to be re...
Chapter
The use of reclaimed asphalt (RA) in road pavements is continuously gaining interest thanks to the technical, economic and environmental advantages guaranteed by such sustainable practice. Cold recycling techniques compared to traditional asphalt mixes allow a significant reduction of energy, fume emissions, use of natural resources, etc. In this p...
Article
Full-text available
The International Society for Asphalt Pavements (ISAP) is a volunteer organization of professionals and experts in asphalt engineering whose goal is to share the latest in leading edge asphalt pavement technology worldwide. ISAP’s most important event, its Conference, is held every four years and the 13th ISAP Conference on Asphalt Pavements (ISAP2...
Article
Aging has a significant effect on performance of asphalt materials. Reliable characterization of asphalt binder properties with aging is crucial to improving asphalt binder specifications as well as modification and formulation methods. The objective of this study is to correlate the laboratory conditioning methods with field aging using evolution...
Article
Rutting distress within a pavement structure has a direct correlation with mixtures' structural responses to loading. For this reason, the complex modulus (E* and phase angle) master curves may be used to estimate the mixtures' rutting performance. This research introduces and investigates five different complex modulus-based rutting index paramete...
Conference Paper
Typical pavement Life Cycle Assessment (LCA) are performed using historical climate data to evaluate pavement performance and provide recommendations for budgeting and planning of M&R strategies in the future. However, due to climate change, this assumption may not be appropriate as flexible pavements’ performance is influenced by climate stressors...
Article
A variety of testing and performance index parameters are available to assess the asphalt mixture performance with respect to different structural distresses. However, because of continuous improvements in asphalt material production and construction techniques, it is necessary to regularly evaluate the correlation of the performance index paramete...
Article
Full-text available
Asphalt materials experience substantial amounts of environmental damage throughout their lives as surface layers in pavements. One of the most prominent forms of environmental damage, moisture-induced damage, is caused by the weakening of internal bonds of the material because of the presence of moisture in the voids of asphalt mixtures and is a c...
Article
Full-text available
Reclaimed asphalt pavement (RAP) has received wide application in asphalt pavement construction and maintenance and it has shown cost-effectiveness over virgin hot mix asphalt (HMA). HMA with a high content of reclaimed asphalt (RA) (e.g., 40%) is sometimes used in practice, however, it may have significant adverse effects on the life cycle perform...
Article
Accurate identification of soil freeze or thaw (FT) is important for road management, because it greatly affects a road’s load bearing capacity. Despite low-volume roads (LVR) being more susceptible to damage because of FT transitions compared with high-volume roadways, relatively few LVRs are monitored via temperature data probes (TDP). Frequent a...
Article
Full-text available
Thermal cracking is a major distress in cold regions of the United States. During pavement cooling cycles, thermally induced (or non-load–associated) tensile stress begins to build-up in asphalt pavement surfaces. From a local or microscopic viewpoint, when the accumulated thermal stress exceeds the local tensile strength of the material, separatio...
Article
Full-text available
Greenhouse gas emissions have caused global temperatures to rise since the mid-20th century accompanied by sea-level rise (SLR). Temperature increases and SLR-induced groundwater rise have been shown to cause premature pavement failure in many roadway structures. Hybrid bottom-up/top-down (hybrid) adaptation approaches have shown promise by initial...
Article
This recommendation describes how to characterize the reclaimed asphalt through the fragmentation test. The guidelines given hereafter are based on the results of a round robin test organized by the RILEM Technical Committee 237-SIB ‘‘Testing and characterization of sustainable innovative bituminous materials and systems’’ and provide information o...
Conference Paper
Since its first development in 1960, the AASHTO design guide for flexible pavements design has been widely used by many agencies for the design of a pavement structure. The guide was substantially modified in 1986 to incorporate nationwide requirements and climatic conditions. However, with significant changes in asphalt technology such as the addi...
Conference Paper
Since its first development in 1960, the AASHTO design guide for flexible pavements design has been widely used by many agencies for the design of a pavement structure. The guide was substantially modified in 1986 to incorporate nationwide requirements and climatic conditions. However, with significant changes in asphalt technology such as the addi...
Article
Full-text available
It is well known that mixture variables such as binder grade, aging state, recycled binder ratio, and recycling agent type and dose alter the rheological properties of asphalt mixtures. The ability to understand these changes in rheological properties caused by changes in the mixture variables is beneficial to know how to change the mixture variabl...
Article
The objective of this study is to evaluate how the viscoelastic, fatigue, and fracture properties of asphalt binders and mixtures change as a function of ageing. Six plant-produced mixtures are evaluated in short term and three different long term ageing conditions (loose mixture conditioned 24 h @ 135°C, 5 days @ 95°C, and 12 days @ 95°C). Compari...
Article
Full-text available
As construction costs continue to rise and adequate amounts of funding continues to be a challenge, the allocation of resources is of critical importance when it comes to the maintenance and rehabilitation (M&R) of highway infrastructure. A Life Cycle Assessment (LCA) methodology is presented here that integrates realistic traffic conditions in the...
Article
Depending on the local conditions and structural design of the pavement, multiple asphalt concrete layers including base, intermediate, and wearing courses are used. Typically, the base and intermediate layers have larger aggregate sizes and lower total asphalt binder contents as compared with the wearing course. Recently, cold recycled (CR) asphal...
Preprint
As construction costs continue to rise and adequate amounts of funding continues to be a challenge, the allocation of resources is of critical importance when it comes to the maintenance and rehabilitation (M&R) of highway infrastructure. A Life Cycle Assessment (LCA) methodology is presented here that integrates realistic traffic conditions in the...
Article
Aging can significantly affect the viscoelastic properties and cracking behavior of asphalt mixtures, causing increase in stiffness, reduction in relaxation capability, and increase in brittleness. Eleven mixtures are evaluated using different laboratory conditioning protocols to evaluate how the properties of asphalt mixtures, including viscoelast...
Article
Pavements are vulnerable to reduced life with climate-change-induced temperature rise. Greenhouse gas emissions have caused an increase in global temperatures since the mid-20th century and the warming is projected to accelerate. Many studies have characterized this risk with a top-down approach in which climate-change scenarios are chosen and appl...
Article
The use of quality assurance (QA) processes in highway infrastructure is critical to ensure durable, safe, and economical transportation operations. These processes ensure the desired level of quality is maintained throughout manufacturing. Precast and pre-stressed concrete elements are commonly used in highway construction projects, including many...
Article
Use of the semi-circular bending (SCB) test has gained popularity for evaluating cracking performance of asphalt mixtures. An Illinois Flexibility Index Test (I-FIT) variant of SCB has shown the ability to distinguish mixtures through use of the flexibility index (FI) parameter. While this index has been able to rank the mixtures with respect to pe...
Article
This study investigates the dependence of overlay field cracking performance on overlay thickness and fracture energy of asphalt mixture. A total of 15 pavement sections in Minnesota for which Disk-shape Compact Tension (DCT) testing was performed on field cores from overlays were used for the study. Due to the difference in the overlay lives, diff...
Presentation
Pavements are vulnerable to reduced life with climate-change induced temperature rise. Greenhouse gas emissions have caused an increase in global temperatures since the mid-20th century and the warming is projected to accelerate. Many studies have characterized this risk with a top-down approach in which climate-change scenarios are chosen and appl...