Digital Commons Network^™

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 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 …

Central Hma Acceptance Lab Process Improvement Implementation Plan Project, Ted W. Boehm, Jim Handy

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) Central Hot Mix Asphalt (HMA) Acceptance Lab was opened on March 29, 2018 at the Office of Materials Management (OMM) facility in Indianapolis. The state-of-the-art lab conducts acceptance testing on HMA samples from INDOT’s Crawfordsville and Greenfield districts, as well as testing of appeals samples from the other four INDOT districts. Each HMA sample undergoes multiple sequences acceptance testing processes. In 2019, project SPR-4353 “Central HMA Acceptance Lab Process Improvement Project” was conducted with the goal to improve organization, flow of work and efficiency in the central region HMA Acceptance Lab for all tests …

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 …

Incorporating Economic Resilience Metrics Into Indot’S Transportation Decision-Making, Yue Ke, Lisa Lorena Losada-Rojas, Davis Chacon-Hurtado, Konstantina Gkritza, Jon D. Fricker

JTRP Technical Reports

The 2007 Great Recession is widely considered the worst economic downturn in recent United States History. In Indiana, the unemployment rate reached 10.6%, and took nearly seven years to return to pre-recession levels. However, employment data from this period shows that the change in total employment at the county level ranged from -20% to +5%, indicating that while many counties suffered from high unemployment, other counties experienced gains in total employment. Various research efforts, including this project, have been undertaken to understand the local characteristics that influence the differing degrees to which regional/city economies were able to resist or cope …

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 …

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 …

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 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 …

202009-02, 09/17/2020, I-70 W, Mm 123, Henry Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.

Statistical Analysis Of Safety Improvements And Integration Into Project Design Process, Andrew P. Tarko, Mario Romero, Cristhian Lizarazo, Raul Pineda

JTRP Technical Reports

RoadHAT is a tool developed by the Center for Road Safety and implemented for the INDOT safety management practice to help identify both safety needs and relevant road improvements. This study has modified the tool to facilitate a quick and convenient comparison of various design alternatives in the preliminary design stage for scoping small and medium safety-improvement projects. The modified RoadHAT 4D incorporates a statistical estimation of the Crash Reduction Factors based on a before-and-after analysis of multiple treated and control sites with EB correction for the regression-to-mean effect. The new version also includes the updated Safety Performance Functions, revised …

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 …

Review: Out In The Center: Public Controversies And Private Struggles, Jonathan J. Rylander

The Writing Center Journal

No abstract provided.

Front Matter

The Writing Center Journal

No abstract provided.

Summer Squash Variety Evaluation For Early-Season Production In High Tunnels, Wenjing Guan

Purdue Fruit and Vegetable Research Reports

This is a compilation of 12 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

Heat Pipe Dryout And Temperature Hysteresis In Response To Transient Heat Pulses Exceeding The Capillary Limit, K. Baraya, J. A. Weibel, S V. Garimella

CTRC Research Publications

The balance between the capillary pressure provided by the wick in a heat pipe or vapor chamber and the flow resistance to liquid resupply at the evaporator determines the maximum heat load that can be sustained at steady state. This maximum heat load is termed as the capillary limit; operation at steady heat loads above the capillary limit will result in dryout at the evaporator wick. However, different user needs and device workloads can lead to highly transient heat loads in applications ranging from con- sumer electronic devices to server processors. In these instances, the operation of heat pipes must …

Retrieval Practice And Word Learning In Children With Specific Language Impairment And Their Typically Developing Peers, Laurence B. Leonard, Patricia Deevy

Purdue Center for Early Learning Faculty and Staff Publications

Purpose

In this article, we review the role of retrieval practice on the word learning and retention of children with specific language impairment (SLI).

Method

Following a brief review of earlier findings on word learning in children with SLI and the assumptions behind retrieval practice, four experiments are described that compared novel words learned in a repeated spaced retrieval condition and those learned in either a repeated study condition or a repeated immediate retrieval condition. Preschool-age children with SLI and their same-age peers with typical language development were the participants in all experiments. The effects of repeated spaced retrieval were …

Agricultural Impacts Of Climate Change In Indiana And Potential Adaptations, Laura C. Bowling, Keith A. Cherkauer, Charlotte Lee, Janna Beckerman, Sylvie Brouder, Jonathan Buzan, Otto Doering Iii, Jeffrey Dukes, Paul Ebner, Jane Frankenburger, Benjamin Gramig, Eileen J. Kladivko, Jeffrey J. Volenec

Agriculture Publications

While all sectors of the economy can be impacted by climate variability and change, the agricultural sector is arguably the most tightly coupled to climate where changes in precipitation and temperature directly control plant growth and yield, as well as livestock production. This paper analyzes the direct and cascading effects of temperature, precipitation, and carbon dioxide (CO2) on agronomic and horticultural crops, and livestock production in Indiana through 2100. Due to increased frequency of drought and heat stress, models predict that the yield of contemporary corn and soybean varieties will decline by 8–21% relative to yield potential, without considering CO2 …

More Inclusive, More Practical: Climate Change Communication Research To Serve The Future, Jessica Eise, Natalie J. Lambert, Tiwaladeoluwa Adekunle, Laura Eise

Purdue Climate Change Research Center Publications

Climate change impacts are being felt around the world, threatening human well-being and global food security. Social scientists in communication and other fields, in tandem with physical scientists, are critical for implementing mitigation and adaptation strategies effectively and equitably. In the face of rapidly evolving circumstances, it is time to take stock of our current climate change communication research and look toward where we need to go. Based on our systematic review of mid- to current climate change research trends in communication as well as climate change response recommendations by the American Meteorological Society, we suggest future directions for research. …

Managing Climate Risk In The U.S. Financial System, Climate-Related Market Risk Subcommittee

Purdue Climate Change Research Center Publications

No abstract provided.

Is This The Perfect Time, Or The Worst Time, To Bend The Climate Change Curve?, R.M. Filley, J.S. Dukes

Purdue Climate Change Research Center Publications

No abstract provided.

Fall Broccoli Production In High Tunnels, Wenjing Guan

Purdue Fruit and Vegetable Research Reports

This is a compilation of 12 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

Cantaloupe And Specialty Melon Variety Evaluation In Indiana, Wenjing Guan, Dennis Nowaskie, Petrus Langenhoven, Dan Egel

Purdue Fruit and Vegetable Research Reports

This is a compilation of 12 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

2019 Standard-Size And Personal-Size Triploid Watermelon Variety Evaluation In Indiana, Wenjing Guan, Dennis Nowaskie, Thomas D H Haseman, Dan Egel

Purdue Fruit and Vegetable Research Reports

This is a compilation of 12 research trial reports from four land-grant universities in the Midwestern United States. Crops include cantaloupe, pickling cucumber, pepper, potato, pumpkin, summer squash and zucchini, sweet corn, tomato, and watermelon. Somecrops were evaluated in high tunnels or hoophouses. Most trials evaluated different cultivars or varieties. One report addressed plant spacing for sweet corn and one addressed soil block for production of tomato seedlings. A list of vegetable seed sources and a list of other online sources of vegetable trial reports are also included.

Response Of Cucumber, Yellow Squash, And Zucchini To Six Nitrogen Rates, Ron G. Goldy, Kyle Ferrantella

Midwest Vegetable Trial Reports

No abstract provided.

2020 Cantaloupe Variety Evaluation In Southern Indiana, Wenjing Guan, Dan Egel, Dennis Nowaskie, Thomas D H Haseman

Midwest Vegetable Trial Reports

Indiana ranks sixth in cantaloupe production in the US. A total of 1,800 acres of cantaloupes were planted in Indiana with a production value of $8.6 million in 2018. Melon produced in Indiana is primarily eastern-type cantaloupes. Recently, extended shelf life varieties have been developed and are becoming attractive in the eastern market. This report compared the yield and quality of seven cantaloupe varieties grown in southern Indiana.

A presentation of this trial is available at https://mediaspace.itap.purdue.edu/media/MVTR+2020+cantaloupe+variety+evaluation+in+southern+Indiana/1_pyaa792t

Cantaloupe And Specialty Melon Variety Evaluation In Indiana, Wenjing Guan, Dennis Nowaskie, Petrus Langenhoven, Daniel S. Egel

Midwest Vegetable Trial Reports

Thirty melon varieties including traditional eastern-type cantaloupe, non-slip muskmelon, honeydew, and other specialty type melons were evaluated in a field trial at the Southwest Purdue Agricultural Center (SWPAC) in Vincennes, IN in 2019. Yield and fruit quality attributes including fruit size, total soluble solids, firmness, etc., were recorded. This study identified promising melon cultivars for growing under Midwest open-field conditions.

Supersweet Sweet Corn Cultivar Evaluation For Northern Indiana, 2019, Elizabeth Maynard

Midwest Vegetable Trial Reports

Indiana sweet corn for fresh market was harvested from 3,580 acres and 426 farms in 2017 (USDA NASS, 2019a). Indiana ranked 16th among states for production of all sweet corn and produced about 0.6% of the nation’s total in 2017 (USDA NASS, 2018). Sweet corn fields for fresh market sales are located throughout the state. In northern Indiana, bicolor corn is most commonly grown. Varieties with improved eating quality are of interest to both producers and consumers. Producers are also interested in yield, ear size, appearance, and agronomic characteristics.

This paper reports on fifteen bicolor, four yellow, and one white …

2020 Pumpkin Variety Trial, Nathan R. Johanning

Midwest Vegetable Trial Reports

In 2020, the University of Illinois Extension conducted an observational pumpkin variety trial in southern Illinois at the Southern Illinois University Belleville Research Center, in Belleville, IL. The trial was a single replication including 54 pumpkin and winter squash varieties divided into 2 categories: Specialty and Jack O’Lantern. Specialty Pumpkins included anything of “carving size” and colors other than orange (white, red, blue, warted, etc.) and included some large specialty pumpkins (over 25 lb) The Jack O’Lantern pumpkins were also grouped as Medium (under 25 lbs) and Large (over 25 lbs). Pumpkins were grown in a no-till, transplanted system, double …