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  Partner: UNT Libraries Government Documents Department
 Decade: 2010-2019
 Serial/Series Title: Research report (Austin, Tex.)
Texas Department of Transportation administration research: tasks completed Fiscal Year 2010

Texas Department of Transportation administration research: tasks completed Fiscal Year 2010

Date: February 2011
Creator: Baker, Richard; Ding, Liang; Epps, Jon; Estakhri, Cindy K.; Fry, Gray; Geiselbrecht, Tina et al.
Description: "This research project evaluates numerous transportation issues and develops findings and/or recommendations based on results. This project has been structured to address some of the emerging, critical, and unique considerations related to transportation."
Contributing Partner: UNT Libraries Government Documents Department
MASH test 3-11 on the 5-inch cast in place deck barrier anchors

MASH test 3-11 on the 5-inch cast in place deck barrier anchors

Date: October 2011
Creator: Bligh, Roger P.; Menges, Wanda L. & Arrington, Dusty R.
Description: "A full-scale crash test was performed to evaluate the impact performance of a Texas T223 concrete beam and post bridge rail anchored to a 5-nch cast-in-place deck (CIPD). The testing followed the MASH standards for Test Level 3 ( TL-#) longitudinal barriers. The test performed was American Association of State Highways and Transportation Officials (AAHSTO) Manual for Assessing Safety Hardware (MASH) test 3-11, which involves a 2270P (500 lb) pickup truck impacting the critical impact point (CIP) of the barrier at a nominal impact speed and angle of 62 mi/h and 25degress, respectively. This test evaluated the strength of the barrier and its anchorage to the 5-inch CIPD."
Contributing Partner: UNT Libraries Government Documents Department
Determination of minimum height and lateral design load for MASH test level 4 bridge rails

Determination of minimum height and lateral design load for MASH test level 4 bridge rails

Date: October 2011
Creator: Bligh, Roger P.; Menges, Wanda L. & Sheikh, Nauman Mansoor
Description: "This research had the objectives of determining the minimum rail height and lateral design impact load for MASH test level 4 bridge rails. Using parametric finite element analysis and subsequent crash testing, the researchers determined the minimum recommended rail height for MASH TL-4 impact conditions to be 36 inches. Later Design impact for MASH TL-4 test conditions was determined to be 80 kips."
Contributing Partner: UNT Libraries Government Documents Department
Performance of lap splices in large-scale column specimens affectedby ASR and/or DEF

Performance of lap splices in large-scale column specimens affectedby ASR and/or DEF

Date: June 2012
Creator: Bracci, Joseph M.; Gardoni, Paolo; Eck, Kathleen M. & Trejo, David
Description: "This research program conducted a large experimental program, which consisted of the design, construction, curing, deterioration, and structural load testing of 16 large-scale column specimens with a critical lap splice region, and then compared and calibrated models developed in the analytical program with the experimental behavior. Specimens were carefully instrumented both internally and externally to monitor the strain behavior of the concrete and reinforcing steel from specimen construction, curing, deterioration, and final structural load testing."
Contributing Partner: UNT Libraries Government Documents Department
Pavement repair strategies for selected distresses in FM roadways

Pavement repair strategies for selected distresses in FM roadways

Date: June 2012
Creator: Dessouky, Samer; Oh, Jeong Ho; Yang, Mijia; Ilias,Mohammad; Lee, Sang Ick; Freeman, Tom et al.
Description: "Expansive soil is considered one of the most common causes of pavement distresses in FM roadways. Depending upon the moisture level, expansive soils will experience changes in volume due to moisture fluctuations from seasonal variations. The objective of this research was to evaluate existing repair projects on selected FM roadways. Those roadways experienced failures in the form of fatigue and rutting in the wheel path, and longitudinal (faulted) cracking including edge cracking. The causes of those failures were mainly linked to high PI expansive soil and narrow pavement."
Contributing Partner: UNT Libraries Government Documents Department
Developing a mixture design specification for flexible base construction

Developing a mixture design specification for flexible base construction

Date: October 2011
Creator: Epps, Jon A.; Sebesta, Stephen; Sahin, Hakan; Button, Joe; Luo, Rong & Lytton, Robert
Description: "In the Texas Department of Transportation (TxDOT), flexible base producers typically generate large stockpiles of material exclusively for TxDOT projects. This large "state-only" inventory often maintained by producers, along with time requirements for testing and reduced manpower within TxDOT offices, resulted in this project's investigation into a mixture-design specification for flexible base. The goals of this project are to develop a flexible base specification that reduces TxDOT's burden for sampling and testing, reduces time and space burdens on producers for maintaining TxDOT-only stockpiles, and maintains or improves the quality of the base."
Contributing Partner: UNT Libraries Government Documents Department
HeatWurx patching at two locations in San Antonio

HeatWurx patching at two locations in San Antonio

Date: June 2012
Creator: Freeman, Thomas J. & Epps, Jon A.
Description: "This report documents the placing, cost, and performance of the HeatWurx pavement patching process, which uses infrared heating to make the pavement soft enough to mill and scarify so that it can be mixed with a rejuvenator and pavement millings to form a patch that stays bonded to the surrounding material."
Contributing Partner: UNT Libraries Government Documents Department
Fatigue failure and cracking in high mast poles

Fatigue failure and cracking in high mast poles

Date: March 2012
Creator: Goyal, Raka; Dhonde, Hemant B. & Dawood, Mina
Description: "This report presents the findings of a comprehensive research project to investigate the fatigue cracking and failure of galvanized high mast illumination poles (HMIP)."
Contributing Partner: UNT Libraries Government Documents Department
Evaluation, presentation and repair of microbial acid-produced attack of concrete

Evaluation, presentation and repair of microbial acid-produced attack of concrete

Date: October 2011
Creator: Hu, Jiong; Hahn, Dittmar; Rudzinski, Walter; Wang, Zhuo & Estrada, Luzelva
Description: This report evaluates the severity of the deterioration in bridges to determine if microbial induced deterioration (MID) is a significant contributor by visual inspection and a number of tests on twelve selected columns. This report also evaluates the effectiveness of suggested test procedures on identifying microbial attack on concrete and the integrity of deteriorated concrete due to the attack.
Contributing Partner: UNT Libraries Government Documents Department
Pavement preservation and system optimization task force

Pavement preservation and system optimization task force

Date: January 2011
Creator: Lomax, Timothy J.
Description: "This report provides: an overview of a proposed three-tier system, preliminary results from a state department of transportation (DOT) survey, initial estimates of required funding, ideas of UTP Category 1 Formula, and an overview of the status of mobility."
Contributing Partner: UNT Libraries Government Documents Department
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