Classroom Implementation of Biology and Architectural Lesson Plans Reflecting Evaluation of Concrete Bridge Decks Using Non-Destructive Evaluation Methods

This research focused on evaluating Reinforced Concrete (RC) bridge decks using Ground Penetrating Radar (GPR), which is important for ensuring safety and durability in existing infrastructure.The 2024 Research Experiences for Teachers (RET) Program on Sustainable and Resilient Infrastructure for Urban Communities at the University of Texas at Arlington (UTA), funded by the National Science Foundation (NSF) included STEM teachers from schools within the Dallas-Fort Worth Metroplex.After a literature review, two small-scale RC beam samples were fabricated with plywood forms.The samples were reinforced with steel rebars with different sizes and concrete covers.Weekly GPR scan of the beam surfaces and data processing were undertaken weekly for 30 days.The samples were then loaded in a bending test set-up until it broke.The results indicated significant changes during the initial 3-weeks.The dielectric properties of concrete and cement hydration caused this variation.The addition of 1% fiber improved the average compression and bending strengths by approximately 10% and 45%, respectively.However, the cover determination was not affected by the fibers.It may be concluded that proper curing and rebar placement are important for RC strength and durability.Non-destructive methods like GPR are effective for assessing concrete integrity.Teachers implemented the information into their classroom lesson plans and hands-on student activities involving physical and biology experiments.This approach will bridge practical experiences with theoretical knowledge, sparking student interest in engineering careers.