Research Pays Off Seminar Series
Every 3rd Tuesday of the month, 10 a.m.
The National Road Research Alliance will provide a monthly seminar* to highlight research topics that will make an impact on the work done here in the state of Minnesota and around the country.
2019 Upcoming Webinars
June 18, Petrographic Laboratory Investigations of the Oldest Concrete Pavement in America presented by Gerard Moulzolf from American Engineering Testing.
Summary: In the summer of 2016, American Engineering Testing (AET) was contacted by the American Concrete Paving Association (ACPA) to investigate concrete from Court Avenue in Bellefontaine, Ohio – the oldest concrete pavement in the United States. The study involved several collaborating parties in both the private and academic sectors to assess the physical, chemical, and geologic properties of the historic pavement, which is still in service. The goals of the investigation were to understand how a concrete pavement placed in 1893 is still performing and what implications can be drawn to modern portland cement concrete pavements (PCCP's) used in highway construction.
AET received two pavement sections from the ACPA for the laboratory study. Representative sub-samples were procured by AET and sent to four separate laboratories to perform analysis of their choosing. Techniques utilized in the study included: petrography (optical microscopy), air void system analysis, scanning electron microscopy, electrical resistivity, neutron imaging, thermogravimetric analysis, and low-temperature differential scanning calorimetry.
These combined studies revealed the nature of the pavement's construction, the properties and attributes of the raw materials utilized, and led to an understanding of the pavement's durability and longevity. Specific material properties obtained by the study were as follows: aggregate characteristics which included lithology/type/size/grading, hardened paste properties which included air void system parameters/water-cement ratio/cement clinker chemistry and morphology. Physical concrete characteristics obtained included permeability, volume of permeable pores, and sorptivity. Petrography in-particular has proven a beneficial tool in the assessment of concrete (both young and old) and is a testament to the power of applied geology in highway engineering and construction.
July 16, Steve Dickman will be speaking on Dustex, a new product for base stabilization.
April 16, 2019--A Study of Diamond Grinding Performance in Texas with Feng Hong from the Texas Department of Transportation.
March 19, 2019--Determining Pavement Design Criteria for Large Stone Subbase Materials, by Bora Cetin, Assistant Professor in the Geotechnical and Geoenvironmental Engineering Area in the Department of Civil, Construction and Environmental Engineering at Iowa State University.
Feb. 19, 2019--Guide for Concrete Pavement Distress Assessments and Solutions by Dale S. Harrington, P.E., founding Director of the Portland Cement Concrete Pavement Technology Center at Iowa State University.
December 18-- Mechanistic design of permeable pavements based on accelerated pavement testing, presented by David R. Smith and Dave Jones, UC Davis Pavement Research Center.
November 20-- The long-term research conducted by the NRRA teams--Rigid, Flexible, Geotech and Pavement Maintenance— was constructed in the summer and fall of 2017. Now these test cells are a year old and our principle investigators for each project will talk about what we have learned so far.
Sept. 18--UAV and Close Range Photogrammetry (CRP) Studies for Transportation Infrastructure Surveys and Condition Assessment, Anand J. Puppala and Surya S. C. Congress, University of Texas Arlington
July 17--Tire Derived Aggregates, Monte Niemi, First State Tire
June 19--Panel Discussion of Rejuvenators, Amy Epps Martin, Texas A and M, Zachry Dept. of Civil Engineering and Matt Mueller, formerly with the Illinois DOT
April 17--Chip Seal Program in Oregon, Ashley Buss, Iowa State University.
March 20--Recycled concrete aggregates in new concrete pavements, Farhad Reza, Professor Department of Mechanical & Civil Engineering, Minnesota State University Mankato
February 20--MnDOT’s use of the Paver Mounted Thermal Profile (PMTP) Method and Veta Software to Find Workmanship Issues in HMA Paving, Rebecca Embacher, Advanced Materials and Technology Engineer, MnDOT Office of Materials and Road Research
Jan. 16--Pavement Preservation Panel Discussion, Jerry Geib, Buzz Powell and John Roberts
2017 Archived Webinars
Dec. 19--Reclaimed Asphalt Pavement (RAP) in Pavement Preservation Applications with Don Matthews, TSD Manager Chief Engineer for Pavement Recycling Systems, Inc. in Jurupa Valley, CA.
Nov. 21-- Biomaterials and Biopolymers with Chris Williams, Gerald & Audrey Olson Professor of Civil Engineering and Director of the Asphalt Materials & Pavements Program, Iowa State University.
Oct. 17--Validated Intelligent Compaction (VIC) Testing at MnROAD and Engineering Data Analysis with David J. White, Ph.D., P.E. President and Chief Engineer, Ingios Geotechnics, Inc
Sept. 19--The Effects of Bio-Sealants or Rejuvenators on Asphalt Binder and Mixture Properties with Debaroti Ghosh, Research Engineer for MnDOT
July 18--Balanced Mix Design David Newcomb from the Materials and Pavement Division of Texas A&M Transportation Institute
Slide from Dave's Presentation with links to video of all the tests he mentioned.
Cracking Test Videos (Powerpoint)
May 16--Factors Affecting Asphalt Mix Durability (Video)
- Factors Affecting Asphalt Mixture Durability (WHRP 14-06), Barry Paye (Powerpoint)
- Critical Factors Affecting Asphalt Concrete Durability, Ramon Bonoquist (Powerpoint)
April 18 - National Road Research Alliance Long Range Research Plans (PDF)
Feb. 21 - Barriers to Implementation of In-Place Recycling