AUGUST 21, 2018
Title: Mechanistic Input Parameters and Model Calibration for Design and Performance Evaluation of Flexible Pavements in Oklahoma.
PRESENTER: Dr. Nur Hossain, Senior Project Manager, Geocal Inc.
MARCH 27, 2018
Title: A Climate Trends "Roadmap" for Transportation
PRESENTER: Dr. Esther Mullens, South Central Climate Science Center
ABSTRACT: Extreme weather, such as heat waves, cold waves, heavy precipitation, and winter storms, impact transportation infrastructure and activities each year, affecting safety and state of good repair. The Southern Plains Transportation Center has made climate adaptive transportation a focus of their research activities. Adapting to present and potential future extremes of weather and climate will require some understanding of how these conditions are trending. It is expected that some of these changes may be such that using only historical climate information in planning and design may no longer be sufficiently accounting for the potential range of extreme conditions that the transportation system will encounter.
The South Central Climate Science Center (SC-CSC) has worked to evaluate recent and future trends in a number of transportation-relevant weather and climate conditions in the South Central United States. I will discuss the motivation and methods used to obtain these trends from climate data. The SC-CSC will shortly be releasing detailed state-by-state summaries of these trends for each state in the SPTC area of responsibility, and i will provide an overview of the information, data sets, and resource that are becoming available to assist transportation researchers and agencies in their planning for future weather extremes.
April 15, 2016
Title: Enhancing Microsoft Word Accessibility Skills
PRESENTER: Rob Carr, Accessibility Coordinator, Oklahoma ABLE Tech
ABSTRACT: Microsoft Word gives document authors several straightforward tools to create more accessible documents. Our workshop will detail how to take advantage of several of the techniques that make more accessible Word documents. You will learn how to use Word to create accessible images, section headings, lists and more. You will also learn techniques to create accessible color choices and data table layouts. All of that, plus more tips and tricks.
May 13, 2015
Title: Alkali-Silica Reaction (ASR) and ASR Mitigation
PRESENTER: Dr. W. Micah Hale, University of Arkansas
ABSTRACT: In 2012 it was discovered that roughly 4 miles of an interstate median barrier along Interstate 49 in Northwest Arkansas had rapidly deteriorated. After the initial inspection, a sample was submitted for analysis, and found to contain evidence of alkali-silica reaction (ASR). A research program was implemented with the goal of determining the cause of ASR and developing a program for mitigating the ongoing deterioration. The median barrier had not deteriorated equally throughout the 4 miles, and the level of damage varied considerably throughout the length. A research program was implemented to evaluate several treatment methods, with the goal of slowing or arresting the deterioration within the median barrier. Several sections of the median barrier were instrumented to measure expansion and internal relative humidity. The barrier wall has been monitored for approximately two years. The aggregates used in the median barrier construction were also evaluated in laboratory testing, which included the AMBT and CPT. The laboratory results were compared to the findings from the petrographic analysis. The results of the laboratory testing were used to develop recommendations on the prevention of ASR in concrete which contains the same aggregates.