Petrina Johannes is a doctoral candidate in Civil Engineering at the University of Wisconsin-Madison, where she is investigating potential test methods that can be used to evaluate early and long term performance of low cost, low energy, high performance pavement preservation treatments, such as chip seals, slurry seals and micro-surfacing.
Currently, road agencies worldwide continue to face increasing challenges of shrinking federal funding and environmental constraints. The paving treatments Petrina is investigating are both cost and energy effective, and when designed and constructed property, with carefully selected materials, and on placed on a right the road, they can increase the life of a pavement for 7 years or longer. She hopes to evaluate various test methods that can be used to predict the performance of these surface treatments, and develop performance specifications. These specifications are going to be used by road agencies to ensure satisfactory performing pavements, and help them provide a safe and comfort ride to the public at a low cost.
A native of Namibia, Petrina received her Bachelor’s degree from the University of Cape Town. She briefly worked for Lithon Project Consultants and later for the Namibian Roads Authority where she developed her passion for roads.