Digital Commons Network^™

Evaluation Of Anti-Icing/De-Icing Products Under Controlled Environmental Conditions, Yi Ji, Bob Mccullouch, Zhi Zhou

JTRP Technical Reports

Snow and ice removal are important tasks during the winter season and large amounts of anti-icing and de-icing chemicals are used and there is a critical need to review and synthesize information from the literature to compare and contrast anti-icing and de-icing chemicals to understand their environmental impact and support decision making. The effectiveness, costs, and environmental impact of commonly used and alternative anti-icing and de-icing chemicals were reviewed in this study. Application of anti-icing and de-icing chemicals may increase ion concentrations in soils and change nitrogen cycle, soil pH, and trace metal concentrations, affect surface water and groundwater, and …

Implementing Rapid Durability Measure For Concrete Using Resistivity And Formation Factor, W. Jason Weiss, Chunyu Qiao, Burkan Isgor, Jan Olek

JTRP Technical Reports

The durability of in-place concrete is a high priority issue for concrete pavements and bridges. Several studies have been conducted by INDOT to use electrical resistivity as a measure of fluid transport properties. Resistivity is dependent on the chemistry of the cement and supplementary cementitious system used, as such it has been recommended that rather than specifying resistivity it may be more general to specify the formation factor. Samples were tested to establish the current levels of performance for concrete pavements in the state of Indiana. Temperature and moisture corrections are presented and acceptable accelerated aging procedure is presented. A …

An Assessment Of The Workforce And Occupations In The Highway, Street, And Bridge Construction Industries In Indiana, Indraneel Kumar, Lionel Beaulieu, Annie Cruz-Porter, Chun Song, Benjamin St. Germain, Andrey Zhalnin

JTRP Technical Reports

This project explores workforce and occupations within the highway, street, and bridge construction industries (NAICS 237310) in Indiana. There are five specific deliverable comprised of three data reports, one policy document, and a website. The first data report includes an assessment of the workforce based on the eight-part framework, which are industry, occupations, job postings, hard-to-fill jobs, Classification of Instructional Programs (CIP), GAP Analysis, compatibility, and automation. The report defines a cluster followed by a detailed analysis of the occupations, skills, job postings, etc., in the NAICS 237310 industry in Indiana. The report makes use of specialized labor market databases, …

Investigation Of Design Alternatives For The Subbase Of Concrete Pavements, Amy Getchell, Luis Garzon Sabogal, Philippe L. Bourdeau, Marika Santagata

JTRP Technical Reports

In all pavement structures, one or more support layers separate the pavement from the subgrade. In addition to offering structural support, these layers have several important functions, which include: providing a stable and uniform construction platform, facilitating drainage, mitigating pumping of the subgrade fines, and protecting the pavement from the effects of frost heave. Their performance is critical in achieving the desired pavement smoothness, and in extending the service life of the structure. A range of designs, making use of unbound or stabilized aggregates and in some cases geosynthetics, are employed by different agencies to fulfill these functions.

This project …

Implementing The Strut-And-Tie Method For The Design Of Bridge Components, Andi S. Vicksman, Christopher S. Williams, Merrick A. Howarth

JTRP Technical Reports

The strut-and-tie method (STM) is used for the design of D-regions (disturbed regions) of reinforced concrete structures. Many typical bridge substructure components consist of D-regions and warrant the use of the STM for design. Implementation of the STM is more complex than typical design methods, and engineers are often unfamiliar with the design process. As a result, designing using the STM is more time consuming than traditional design methods. The Indiana Department of Transportation (INDOT) identified a need for resources and tools that assist with the design of typical bridge substructure components using the STM. The primary tool created to …

Speed Management In Small Cities And Towns—Guidelines For Indiana, Andrew P. Tarko, Thomas Hall, Cristhian Lizarazo, Fernando España-Monedero

JTRP Technical Reports

Many small cities and towns in rural states such as Indiana are crossed by arterial highways. The local traffic on these roads, particularly vulnerable road users, face the excessive risk of injury and death. This danger is amplified with local land development, driveways, and on-street parking in town centers. This report presents an Indiana study of the speeding problem on arterial roads passing through small communities. Past research on various countermeasures suitable for the studied conditions were identified and the connection between speed reduction and safety improvements was investigated in a sample of Indiana small towns. Promising speed-reduction measures include …

Implementing The Superpave 5 Asphalt Mixture Design Method In Indiana, John E. Haddock, Reyhaneh Rahbar-Rastegar, M. Reza Pouranian, Miguel Montoya, Harsh Patel

JTRP Technical Reports

Recent research developments have indicated that asphalt mixture durability and pavement life can be increased by modifying the Superpave asphalt mixture design method to achieve an in-place density of 95%, approximately 2% higher than the density requirements of conventionally designed Superpave mixtures. Doing so requires increasing the design air voids content to 5% and making changes to the mixture aggregate gradation so that effective binder content is not lowered. After successful laboratory testing of this modified mixture design method, known as Superpave 5, two controlled field trials and one full scale demonstration project, the Indiana Department of Transportation (INDOT) let …

Development Of Subgrade Stabilization And Slab Undersealing Solutions For Pcc Pavements Restoration And Repairs, Ali Behnood, Jan Olek

JTRP Technical Reports

The loss of functionality and the development of distress in concrete pavements is often attributable to the poor subbase and subgrade conditions and/or loss of support due to the development of the voids underneath the slab. Subgrade soil stabilization can be used as an effective approach to restore the functionality of the subgrades in patching projects. This research had two main objectives: (1) identifying the best practices for soil stabilization of the existing subgrade during pavement patching operations and (2) identifying and developing new, modified grouting materials for slab stabilization and undersealing. Various stabilization scenarios were tested and showed improved …

Installation And Maintenance Of Raised Pavement Markers At State Transportation Agencies: Synthesis Of Current Practices, Hamed Zamenian, Dulcy M. Abraham

JTRP Technical Reports

Although raised pavement markers (RPMs) have been widely applied by the Indiana Department of Transportation (INDOT), there have been multiple cases where snowplowing activities have damaged pavements as well as the raised pavement markers on INDOT’s roadway assets. Dislodged raised pavement markers could reduce the design life of pavements because they leave openings for water and debris to infiltrate through pavement section. Interviews with INDOT personnel indicated that the proper installation of the markers and careful attention to the tooling of the center line of the concrete pavements could alleviate this problem. To explore issues related to the proper installation …

Investigation Of Strategic Deployment Opportunities For Unmanned Aerial Systems (Uas) At Indot, Sarah M. Hubbard, Bryan Hubbard

JTRP Technical Reports

Unmanned aerial systems (UAS) are increasingly used for a variety of applications related to INDOT’s mission including bridge inspection, traffic management, incident response, construction and roadway mapping. UAS have the potential to reduce costs and increase capabilities. Other state DOTs and transportation agencies have deployed UAS for an increasing number of applications due to technology advances that provide increased capabilities and lower costs, resulting from regulatory changes that simplified operations for small UAS under 55 pounds (aka, sUAS).

This document provides an overview of UAS applications that may be appropriate for INDOT, as well as a description of the regulations …

Indot Research Program Benefit Cost Analysis—Return On Investment For Projects Completed In Fy 2019, Bob Mccullouch

JTRP Technical Reports

To demonstrate the value of research and its implementation, the Governor’s Office requested an annual financial analysis of the INDOT Research Program to determine the return on the research investment (ROI). This report is for the 35 research projects that completed in FY 2019. The ROI analysis will supplement the annual IMPACT report by adding a more rigorous quantitative benefit cost analysis (BCA) to the Research Program. Previous financial analyses used the approach of calculating net present values of cash flows to determine a benefit cost ratio and this report uses the same approach. Additionally, an overall program rate of …

Led Street Lighting Implementation Research, Support, And Testing, Robert Kramer

JTRP Technical Reports

This report describes the results of technical analysis, field tests, and laboratory tests that were performed for LED highway lighting options by the Energy Efficiency and Reliability Center (EERC) at Purdue University Northwest for the Indiana Department of Transportation (INDOT). This effort was conducted over the past 3 years to evaluate and test the technology and viability of using modern highway lighting technology to enhance energy efficiency, safety, security, and economic development of communities and roadways. During the testing period there was a continuous discussion between INDOT and EERC regarding the laboratory and field testing of INDOT approved luminaires submitted …

Verification Of Bridge Foundation Design Assumptions And Calculations, Fei Han, Monica Prezzi, Rodrigo Salgado, Mehdi Marashi, Timothy Wells, Mir Zaheer

JTRP Technical Reports

The Sagamore Parkway Bridge consists of twin parallel bridges over the Wabash River in Lafayette, IN. The old steel-truss eastbound bridge was demolished in November 2016 and replaced by a new seven-span concrete bridge. The new bridge consists of two end-bents (bent 1 and bent 8) and six interior piers (pier 2 to pier 7) that are founded on closed-ended and open-ended driven pipe piles, respectively. During bridge construction, one of the bridge piers (pier 7) and its foundation elements were selected for instrumentation for monitoring the long-term response of the bridge to dead and live loads. The main goals …

Legal And Permit Loads Evaluation For Indiana Bridges, Chris Kusiak, Mark D. Bowman, Arun Prakash

JTRP Technical Reports

According to federal law, routine commercial vehicles must adhere to certain limits on their load configuration in order to operate legally on interstate highways. However, states may allow for heavier or different load configurations provided that bridges on the state and county highway system are load rated and, if necessary, posted with vehicles that appropriately represent these loads. The state of Indiana allows several classes of vehicles to operate with loads that exceed federal limits, and, presently, several LFD design loads are used to represent these exceptions as state legal loads. This study evaluates the MBE rating loads for their …

Performance Of Right-Turn Lane Designs At Intersections, Satish Ukkusuri, Lu Ling, Tho V. Le, Wenbo Zhang

JTRP Technical Reports

Right-turn lane (RTL) crashes are among the most key contributors to intersection crashes in the US. Different right turn lanes based on their design, traffic volume, and location have varying levels of crash risk. Therefore, engineers and researchers have been looking for alternative ways to improve the safety and operations for right-turn traffic. This study investigates the traffic safety performance of the RTL in Indiana state based on multi-sources, including official crash reports, official database, and field study. To understand the RTL crashes' influencing factors, we introduce a random effect negative binomial model and log-linear model to estimate the impact …

Extraction Of Vehicle Can Bus Data For Roadway Condition Monitoring, Howell Li, Enrique Saldivar-Carranza, Jijo K. Mathew, Woosung Kim, Jairaj Desai, Timothy Wells, Darcy M. Bullock

JTRP Technical Reports

Obtaining timely information across the state roadway network is important for monitoring the condition of the roads and operating characteristics of traffic. One of the most significant challenges in winter roadway maintenance is identifying emerging or deteriorating conditions before significant crashes occur. For instance, almost all modern vehicles have accelerometers, anti-lock brake (ABS) and traction control systems. This data can be read from the Controller Area Network (CAN) of the vehicle, and combined with GPS coordinates and cellular connectivity, can provide valuable on-the-ground sampling of vehicle dynamics at the onset of a storm. We are rapidly entering an era where …

Cost And Benefit Analysis Of Installing Fiber Optics On Indot Projects, Ananth V. Iyer, Samuel Labi, Steven Dunlop, Thomas Brady Jr., Eki Amijaya, Abdullah Nafakh

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) is tasked with the stewardship of billions of dollars’ worth of public invested highway infrastructure. Not only does INDOT continually seek design and operational policies that foster cost effective project delivery and procurement, they also seek opportunities for revenue generation.

Due to population growth and the increased demand for online connectivity and global information transmission, the fiber-optic cable industry has experienced rapid growth over the past few years. Information and communication technology (ICT) companies have long sought to achieve higher economic productivity by installing fiber-optic cables in the right of way (ROW) of access-controlled …

Concrete Box Beam Risk Assessment And Mitigation: Volume 2—Evaluation And Structural Behavior, Robert J. Frosch, Christopher S. Williams, Ryan T. Molley, Ryan T. Whelchel

JTRP Technical Reports

Adjacent box beam bridges have a history of poor long-term performance including premature deterioration and failures. Leaking joints between box beams allow chloride-laden water to migrate through the superstructure and initiate corrosion. The nature of this deterioration leads to uncertainty of the extent and effect of deterioration on structural behavior. Due to limitations in previous research and understanding of the strength of deteriorated box beam bridges, conservative assumptions are made for the assessment and load rating of these bridges. Furthermore, the design of new box beam bridges, which can offer an efficient and economical solution, is often discouraged due to …

Heat Generation Of Bulk-Fill Composites Polymerized By Multipeak Versus Single Peak Light Curing Units, Fahad Baabdullah

Student Theses, Dissertations and Capstones

Background: Multipeak light-curing units (LCUs) are gaining popularity due to potential need to activate different photoinitiators. One of the risks associated with using LCUs is heat generation which can reach the pulp chamber through restorative materials and may cause an adverse pulp reaction. However, there is a limited data on heat generation potential of multipeak as compared to single peak LCUs.

Objective: Evaluate the difference in heat generation, and transmission from single peak versusmultipeak LED-LCUs through dentin and different bulk-fill resin-based composites (BFRCs) at pulpal wall (PW).

Materials and Methods: A single extracted sound human molar was used for standardized …

Reliability Of Methods To Evaluate Sensitivity Caused By In-Office Bleaching Procedures, Ahmed Abuzinadah

Student Theses, Dissertations and Capstones

Objective: To evaluate and compare the reliability of different methods to measure sensitivity caused by in-office bleaching procedures.

Methodology: A convenience sample of 34 patients from the dental clinics at Nova Southeastern University participated in the study upon IRB approval, signing consent forms and complying the inclusion/exclusion criteria. All procedures were provided by the same operator (Dr. Abuzinadah) according to the manufacturer’s instructions using Opalescence® Boost® PF 40% (Ultradent, South Jordan, UT). No additional treatments were provided for desensitization. A visual analogue scale (VAS) was used to assess the level of sensitivity during the procedure, 1-hour, 24-hours, 48-hours, 1-week and …

Dentists’ Communication Skills As Determinants Of Patient Initiation Of Treatment, Nojoud Omar A Balubaid

Student Theses, Dissertations and Capstones

In the medical field literature, studies allude to the importance of interpersonal relationships between the caregiver and the patient. Communication has been highlighted as a key factor that mediates the doctor to patient relationship. This study investigated the relationship between patient initiation of treatment with the patients’ perceptions of the quality of the dentist-patient communication. A cross-sectional study that solicited from patients seeking services at Nova Southeastern University Post-Graduate Dental Programs responses to a questionnaire that measured patient’s perception of the quality of communication of the attending dentist. The participants of the study were patients of the NSU Post-graduate dental …

Dental Visual Support Schedule App For Behavior Management Of Pediatric Dental Patients With Autism: Pilot Study, Ana Lina Gonzalez Caceres

Student Theses, Dissertations and Capstones

Background: Autism Spectrum Disorder (ASD) is a prevalent neurodevelopmental disorder in the U.S (about 1 in 54 children). Treating children with ASD in the dental office can be challenging due to their impairments in social interactions, communication and aversive behavior. Visual Support Schedules are visual aids or picture cues that have been beneficial for the behavior management of patients with ASD. There are limited studies regarding effective behavior management techniques that could help those patients have a better experience at the dentist. Methods: A Visual Support Schedule App was used for behavior management compared to Tell Show DO (TSD) on …

Transitioning From Individualized Pediatric Dental Care Of Children With Autism Spectrum Disorder At The Mailman Segal Dental Clinic To Traditional Dental Settings, Toni-Marie Small

Student Theses, Dissertations and Capstones

Background: Children with special healthcare needs (SHCN) such as Autism Spectrum Disorder (ASD) usually develop strong bonds with their pediatric dental care provider. However, as they mature, transitioning to other services or providers is necessary. Low rates of successful transition of children with SHCN have gained national attention especially since their lifelong conditions require continuous care. It is important to facilitate a smooth transition among providers; dental care providers specifically. These transitions are imperative to prevent these children from losing access to dental care as they mature. This pilot study seeks to describe the proportion of children with ASD seen …

Oral Probiotic Supplementation As An Adjunct To Non-Surgical Therapy In Peri-Implantitis Lesions: A Pilot Study, Po-Ning Polly Huang

Student Theses, Dissertations and Capstones

Introduction: During the last decade, the results of several clinical studies suggested that oral probiotics may potentially improve oral health. The first study examining the effects of probiotics on oral health demonstrated that almost every patient with gingivitis, periodontitis or pregnancy gingivitis, had significant improvements in measurable periodontal indices when they were treated with a locally administered culture supernatant of a Lactobacillus acidophilus strain. This finding sparked several other studies to further examine the potential for treating oral diseases, such as, combating halitosis, oral candidiasis, and dental caries with probiotics. Of our interest, Fernandez et al. and Hollstrom et al. …

Improvement Of Stiffness And Strength Of Backfill Soils Through Optimization Of Compaction Procedures And Specifications, Shahedur Rahman, Rodrigo Salgado, Monica Prezzi, Peter J. Becker

JTRP Technical Reports

Vibration compaction is the most effective way of compacting coarse-grained materials. The effects of vibration frequency and amplitude on the compaction density of different backfill materials commonly used by INDOT (No. 4 natural sand, No. 24 stone sand, and No. 5, No. 8, No. 43 aggregates) were studied in this research. The test materials were characterized based on the particle sizes and morphology parameters using digital image analysis technique. Small-scale laboratory compaction tests were carried out with variable frequency and amplitude of vibrations using vibratory hammer and vibratory table. The results show an increase in density with the increase in …

Truck Traffic And Load Spectra Of Indiana Roadways For The Mechanistic-Empirical Pavement Design Guide, Jieyi Bao, Xiaoqiang Hu, Cheng Peng, Yi Jiang, Shuo Li, Tommy Nantung

JTRP Technical Reports

The Mechanistic-Empirical Pavement Design Guide (MEPDG) has been employed for pavement design by the Indiana Department of Transportation (INDOT) since 2009 and has generated efficient pavement designs with a lower cost. It has been demonstrated that the success of MEPDG implementation depends largely on a high level of accuracy associated with the information supplied as design inputs. Vehicular traffic loading is one of the key factors that may cause not only pavement structural failures, such as fatigue cracking and rutting, but also functional surface distresses, including friction and smoothness. In particular, truck load spectra play a critical role in all …

Correction To: Bilingualism Is Associated With A Delayed Onset Of Dementia But Not With A Lower Risk Of Developing It: A Systematic Review With Meta-Analyses, Stefano Brini, Hamid R. Sohrabi, Jeffrey J. Hebert, Mitchell R. L. Forrest, Matti Laine, Heikki Hämäläinen, Mira Karrasch, Jeremiah J. Peiffer, Ralph N. Martins, Timothy J. Fairchild

Research outputs 2014 to 2021

The original version of this article unfortunately contained the following mistakes. 1. In the Results section under the paragraph Disease Severity, the sentence “The PIs ranged between -0.47 and 0.57 MMSE points” should read -0.49 and 0.59 MMSE points. 2. In Figs. 3, 5, and 7, the labels “favour bilinguals” and “favours monolinguals” should be inverted. Therefore, it should be “favours monolinguals” and “favours bilinguals”. Please see below for the correct figures. © 2020, The Author(s).

Elecsys Csf Biomarker Immunoassays Demonstrate Concordance With Amyloid-Pet Imaging, James A. Doecke, Larry Ward, Samantha C. Burnham, Victor L. Villemagne, Qiao-Xin Li, Steven Collins, Christopher J. Fowler, Ekaterina Manuilova, Monika Widmann, Stephanie R. Rainey-Smith, Ralph N. Martins, Colin L. Masters, Aibl Research Group

Research outputs 2014 to 2021

Background: β-amyloid (Aβ) positron emission tomography (PET) imaging is currently the only Food and Drug Administration-approved method to support clinical diagnosis of Alzheimer's disease (AD). However, numerous research studies support the use of cerebrospinal fluid (CSF) biomarkers, as a cost-efficient, quick and equally valid method to define AD pathology. Methods: Using automated Elecsys® assays (Roche Diagnostics) for Aβ (1-42) (Aβ42), Aβ (1-40) (Aβ40), total tau (tTau) and phosphorylated tau (181P) (pTau), we examined CSF samples from 202 participants of the Australian Imaging, Biomarkers and Lifestyle (AIBL) study of ageing cohort, to demonstrate the concordance with pathological AD via PET imaging. …

Hiding In Plain Sight: The Globally Distributed Bacterial Candidate Phylum Pauc34f, Michael L. Chen, Eric D. Becraft, Maria Pachiadaki, Julia M. Brown, Jessica K. Jarett, Josep M. Gasol, Nikolai V. Ravin, Duane P. Moser, Takuro Nunoura, Gerhard J. Herndl, Tanja Woyke, Ramunas Stepanauskas

Research outputs 2014 to 2021

Bacterial candidate phylum PAUC34f was originally discovered in marine sponges and is widely considered to be composed of sponge symbionts. Here, we report 21 single amplified genomes (SAGs) of PAUC34f from a variety of environments, including the dark ocean, lake sediments, and a terrestrial aquifer. The diverse origins of the SAGs and the results of metagenome fragment recruitment suggest that some PAUC34f lineages represent relatively abundant, free-living cells in environments other than sponge microbiomes, including the deep ocean. Both phylogenetic and biogeographic patterns, as well as genome content analyses suggest that PAUC34f associations with hosts evolved independently multiple times, while …

Definitions, Sources And Self-Reported Consumption Of Regionally Grown Fruits And Vegetables In Two Regions Of Australia, Katherine Kent, Stephanie Godrich, Sandra Murray, Stuart Auckland, Lauren Blekkenhorst, Beth Penrose, Johnny Lo, Amanda Devine

Research outputs 2014 to 2021

Regional food systems are complex networks, with numerous retail sources that underpin a local economy. However, evidence is limited regarding how consumers define, identify, and source regionally grown fresh fruits and vegetables (RGFFV). A cross-sectional study was conducted in Tasmania (TAS) and South Western Australia (SWA) to compare how RGFFV are defined, identified and sourced by consumers, including self-reported consumption of selected RGFFV. Survey data were analyzed using the Chi-square test and t-tests. Results (TAS n = 120, SWA n = 123) identified that consumers had mixed perceptions of how RGFFV are defined, including produce sold at farmers markets, or …