About Bob

Dr. Steffes joined the Institute for Transportation after retiring from the Iowa Department of Transportation in 2003. He works in the Portland Cement Concrete Pavement and Materials Research Laboratory in Town Engineering Building at Iowa State University. 

Research

Completed Research

Jun, 2016

Development and Evaluation of Portable Device for Measuring Curling and Warping in Concrete Pavements

Aug, 2015

Evaluating Roadway Subsurface Drainage Practices – Phase II

May, 2013

Evaluating Roadway Subsurface Drainage Practices

Jun, 2009

Investigation into Freezing-Thawing Durability of Low Permeability Concrete with and without Air Entraining Agent

Jun, 2008

Improving Variability and Precision of AVA Test Results and Developing Rational Specification Limits

Dec, 2007

Material and Construction Optimization for Prevention of Premature Pavement Distress in PCC Pavements, Phase 3

Nov, 2005

Self-Consolidating Concrete: Applications for Slip Form Paving, Phase 1